1625-0060 Stat/Authority

Coast Guard, DHS

Pt. 39

(1) Maximum allowable pressure, as
determined by the safety relief valve
setting; or
(2) Design pressure, when cargo tanks
operate at maximum allowable pressures reduced below the design pressure
in order to satisfy special mechanical
stress relief requirements.
NOTE: See the ASME Code, Section VIII,
Appendix 3 for information on design pressure.

(c) For pressure vessels designed and/
or supported such that they cannot
safely be filled with water, the Commandant will consider a pneumatic
test in lieu of the hydrostatic test. A
leak test shall be performed in conjunction with the pneumatic test.
Pneumatic testing shall be in accordance with subchapter F (Marine Engineering) of this chapter.
(d) Nonpressure vessel type tanks
shall be tested to a pressure equal to
the pressure on the bottom of the tank
under the design conditions listed in
§ 38.05–4(e).
(e) In the application of the requirements for testing of the cargo tanks,
the test shall in no case be less severe
than the worst anticipated service condition of the cargo loading.
(f) In the design and testing of the
independent cargo tanks, consideration
shall be given to the possibility of the
independent tanks being subjected to
external loads.
[CGFR 66–33, 31 FR 15269, Dec. 6, 1966, as
amended by CGD 85–061, 54 FR 50962, Dec. 11,
1989]

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§ 38.25–3 Nondestructive
ALL.

testing—TB/

(a) Before nondestructive testing
may be conducted to meet § 38.25–1
(a)(4) and (a)(5), the owner shall submit
a proposal to the Officer in Charge, Marine Inspection for acceptance that includes—
(1) The test methods and procedures
to be used, all of which must meet section V of the ASME Boiler and Pressure Vessel Code (1986);
(2) Each location on the tank to be
tested; and
(3) The test method and procedure to
be conducted at each location on the
tank.

(b) If the Officer in Charge, Marine
Inspection rejects the proposal, the Officer in Charge, Marine Inspection informs the owner of the reasons why the
proposal is rejected.
(c) If the Officer in Charge, Marine
Inspection accepts the proposal, then
the owner shall ensure that—
(1) The proposal is followed; and
(2) Nondestructive testing is performed by personnel meeting ASNT
‘‘Recommended Practice No. SNT-TC1A (1988), Personnel Qualification and
Certification in Nondestructive Testing.’’
(d) Within 30 days after completing
the nondestructive test, the owner
shall submit a written report of the results to the Officer in Charge, Marine
Inspection.
[CGD 85–061, 54 FR 50963, Dec. 11, 1989]

§ 38.25–5 Removal of defective tanks—
TB/ALL.
If a tank fails to pass the tests prescribed in this subpart, it shall be removed from service unless otherwise
authorized by the Commandant.
§ 38.25–10 Safety
relief
valves—TB/
ALL.
(a) The cargo tank safety relief
valves shall be inspected at least once
in every 2 years.
(b) The safety relief valve discs must
be lifted from their seats in the presence of a marine inspector by either
liquid, gas, or vapor pressure at least
once every 5 years to determine the accuracy of adjustment and, if necessary,
must be reset.
[CGFR 66–33, 31 FR 15269, Dec. 6, 1966, as
amended by CGD 95–027, 61 FR 26000, May 23,
1996]

PART 39—VAPOR CONTROL
SYSTEMS
Subpart 39.10—GeneraI
Sec.
39.10–1 Applicability—TB/ALL.
39.10–3 Definitions—TB/ALL.
39.10–5 Incorporation
by
reference—TB/
ALL.
39.10–9 Vessel vapor processing unit—TB/
ALL.
39.10–11 Personnel training—TB/ALL.
39.10–13 Submission of vapor control system
designs—TB/ALL.

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§ 39.10–1

46 CFR Ch. I (10–1–09 Edition)

Subpart 39.20—Design and Equipment
39.20–1 Vapor collection system—TB/ALL.
39.20–3 Cargo gauging system—TB/ALL.
39.20–7 Tankship liquid overfill protection—
T/ALL.
39.20–9 Tank barge liquid overfill protection—B/ALL.
39.20–11 Vapor overpressure and vacuum
protection—TB/ALL.
39.20–13 High and low vapor pressure protection for tankships—T/ALL.

Subpart 39.30—Operations
39.30–1

Operational requirements—TB/ALL.

Subpart 39.40—Lightering and Topping-Off
Operations with Vapor Balancing
39.40–1 General requirements for vapor balancing—TB/ALL.
39.40–3 Design and equipment for vapor balancing—TB/ALL.
39.40–5 Operational requirements for vapor
balancing—TB/ALL.
AUTHORITY: 33 U.S.C. 1231; 46 U.S.C. 3306,
3703, 3715(b); 45 FR 58801, 3 CFR, 1980 Comp.,
p. 277; Department of Homeland Security
Delegation No. 0170.1.
EDITORIAL NOTE: Nomenclature changes to
part 39 appear at 74 FR 49227, Sept. 25, 2009.
SOURCE: CGD 88–102, 55 FR 25446, June 21,
1990, unless otherwise noted.

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Subpart 39.10—General
§ 39.10–1 Applicability—TB/ALL.
(a) Except as specified by paragraph
(c) of this section, this part applies to
each tank vessel operating in the navigable waters of the United States,
when collecting vapors of crude oil,
gasoline blends, or benzene emitted
from a vessel’s cargo tanks through a
vapor control system.
(b) A tank vessel which transfers vapors of flammable or combustible cargoes other than crude oil, gasoline
blends, or benzene, to a facility covered
by 33 CFR part 154 must meet the requirements prescribed by the Commandant (CG–522).
(c) A tank vessel with an existing
vapor collection system specifically approved by the Coast Guard for the collection of cargo vapor which was operating prior to July 23, 1990, is subject
only to § 39.30–1 and § 39.40–5 of this part
as long as it transfers cargo vapor only
to the specific facilities for which it
was approved.

(d) This part does not apply to the
collection of vapors of liquefied flammable gases as defined in § 30.10–39 of
this subchapter.
[CGD 88–102, 55 FR 25446, June 21, 1990, as
amended by CGD 95–072, 60 FR 50462, Sept. 29,
1995; CGD 96–041, 61 FR 50727, Sept. 27, 1996]

§ 39.10–3

Definitions—TB/ALL.

As used in this part:
Cargo deck area means that part of
the weather deck that is directly over
the cargo tanks.
Existing vapor collection system means
a vapor collection system which was
operating prior to July 23, 1990.
Facility vapor connection means the
point in a facility’s fixed vapor collection system where it connects with the
vapor collection hose or the base of the
vapor collection arm.
Independent as applied to two systems means that one system will operate with a failure of any part of the
other system except power sources and
electrical feeder panels.
Inerted means the oxygen content of
the vapor space in a cargo tank is reduced to 8 percent by volume or less in
accordance with the inert gas requirements of § 32.53 or § 153.500 of this chapter.
Lightering or lightering operation
means the transfer of a bulk liquid
cargo from a tank vessel to a service
vessel.
Marine Safety Center means the Commanding Officer, U.S. Coast Guard Marine Safety Center, 1900 Half Street,
SW, Suite 1000, Room 525, Washington,
DC 20024 for visitors. Send all mail to
Commanding Officer, U.S. Coast Guard
Marine Safety Center, 2100 2nd St. SW.,
Stop 7102, Washington, DC 20593–7102, in
a written or electronic format. Information for submitting the VSP electronically can be found at http://
www.uscg.mil/HQ/MSC.
Maximum
allowable
transfer
rate
means the maximum volumetric rate
at which a vessel may receive cargo or
ballast.
New vapor collection system means a
vapor collection system which is not
an existing vapor collection system.
Service vessel means a vessel which
transports bulk liquid cargo between a
facility and another vessel.

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Coast Guard, DHS

§ 39.10–5

Topping-off operation means the
transfer of a bulk liquid cargo from a
service vessel to another vessel in
order to load the receiving vessel to a
deeper draft.
Vapor balancing means the transfer of
vapor displaced by incoming cargo
from the tank of a vessel receiving
cargo into a tank of the vessel or facility delivering cargo via a vapor collection system.
Vapor collection system means an arrangement of piping and hoses used to
collect vapor emitted from a vessel’s
cargo tanks and to transport the vapor
to a vapor processing unit.
Vapor control system means an arrangement of piping and equipment
used to control vapor emissions collected from a vessel. It includes the
vapor collection system and vapor
processing unit.
Vapor processing unit means the components of a vapor control system that
recovers, destroys, or disperses vapor
collected from a vessel.
Vessel vapor connection means the
point in a vessel’s fixed vapor collection system where it connects with the
vapor collection hose or arm.

§ 39.10–5 Incorporation by reference—
TB/ALL.
(a) Certain materials are incorporated by reference into this part
with the approval of the Director of the
Federal Register in accordance with 5
U.S.C. 552(a). To enforce any edition
other than the one listed in paragraph
(b) of this section, notice of change
must be published in the FEDERAL REGISTER and the material made available
to the public. All approved material is
on file at the U.S. Coast Guard, Office
of Operating and Environmental Standards (CG–522), 2100 2nd St. SW., Stop
7126, Washington, DC 20593–7126, or at
the National Archives and Records Administration (NARA). For information
on the availability of this material at
NARA, call 202–741–6030, or go to: http://
www.archives.gov/federallregister/
codeloflfederallregulations/
ibrllocations.html. All material is
available from the sources indicated in
paragraph (b) of this section.
(b) The material approved for incorporation by reference in this part, and
the sections affected are:

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[CGD 88–102, 55 FR 25446, June 21, 1990, as
amended by USCG–2007–29018, 72 FR 53965,
Sept. 21, 2007]
American Petroleum Institute (API), 1220 L Street NW., Washington, DC 20005
API Standard 2000, Venting Atmospheric and Low-Pressure Storage Tanks
(Nonrefrigerated and Refrigerated), Third Edition, January 1982 (reaffirmed
December 1987) ..................................................................................................
American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY
10036
ANSI B16.5, Steel Pipe Flanges and Flanged Fittings, 1981 .................................
American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, West
Conshohocken, PA 19428–2959
ASTM F 1271–90 (1995)—Standard Specification for Spill Valves for Use in Marine Tank Liquid Overpressure Protection Applications ..................................
International Electrotechnical Commission (IEC), Bureau Central de la Commission
Electrotechnique Internationale, 1 rue de Varembe´, Geneva, Switzerland
IEC 309–1—Plugs, Socket-Outlets and Couplers for Industrial Purposes: Part 1,
General Requirements, 1979 ..............................................................................
IEC 309–2—Plugs, Socket-Outlets and Couplers for Industrial Purposes: Part 2,
Dimensional Interchangeability Requirements for Pin and Contact-tube Accessories, 1981 ....................................................................................................
National Electrical Manufacturers Association (NEMA), 2101 L St. NW., Washington,
DC 20036
ANSI/NEMA WD6—Wiring Devices, Dimensional Requirements, 1988 .................
National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02269
NFPA 70—National Electrical Code, 1987 .............................................................
Oil Companies International Marine Forum (OCIMF), 15th Floor, 96 Victoria Street,
London SWIE 5JW, England
International Safety Guide for Oil Tankers and Terminals, Third Edition, 1988

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39.20–11

39.20–1

39.20–9

39.20–9

39.20–9

39.20–9
39.20–9

39.30–1

§ 39.10–9

46 CFR Ch. I (10–1–09 Edition)

[CGD 88–102, 55 FR 25446, June 21, 1990, as amended by CGD 95–072, 60 FR 50462, Sept. 29, 1995;
CGD 96–041, 61 FR 50727, Sept. 27, 1996; CGD 97–057, 62 FR 51043, Sept. 30, 1997; USCG-1999–5151,
64 FR 67177, Dec. 1, 1999]

§ 39.10–9 Vessel
unit—TB/ALL.

vapor

processing

Each vessel which has a vapor processing unit located on board must meet
the requirements of 33 CFR part 154,
subpart E to the satisfaction of the
Commandant (CG–522) in addition to
complying with the requirements of
this part.
[CGD 88–102, 55 FR 25446, June 21, 1990, as
amended by CGD 95–072, 60 FR 50462, Sept. 29,
1995; CGD 96–041, 61 FR 50727, Sept. 27, 1996]

§ 39.10–11
ALL.

Personnel

training—TB/

(a) A person in charge of a transfer
operation utilizing a vapor collection
system must have completed a training
program covering the particular system installed on the vessel. Training
must include drills or demonstrations
using the installed vapor control system covering normal operations and
emergency procedures.
(b) The training program required by
paragraph (a) of this section must
cover the following subjects:
(1) Purpose of a vapor control system;
(2) Principles of the vapor control
system;
(3) Components of the vapor control
system;
(4) Hazards associated with the vapor
control system;
(5) Coast Guard regulations in this
part;
(6) Operating procedures, including:
(i) Testing and inspection requirements,
(ii) Pre-transfer procedures,
(iii) Connection sequence,
(iv) Start-up procedures, and
(v) Normal operations; and
(7) Emergency procedures.
[CGD 88–102, 55 FR 25446, June 21, 1990; 55 FR
39270, Sept. 26, 1990]

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§ 39.10–13 Submission of vapor control
system designs—TB/ALL.
(a) Plans, calculations, and specifications for a new vessel vapor collection
system must be submitted to the Ma-

rine Safety Center for approval prior to
installation.
(b) An existing vapor collection system installation that has been Coast
Guard approved to transfer cargo vapor
to specific facilities must be reviewed
and approved by the Marine Safety
Center prior to transferring vapors to
other facilities.
(c) The owners/operators of a foreign
flag vessel may submit certification by
the classification society which classes
the vessel that the vessel meets the requirements of this part as an alternative to meeting the requirements in
paragraph (a) of this section.
(d) Upon satisfactory completion of
plan review and inspection of the vapor
collection system or receipt of the certification provided for in paragraph (c)
of this section, the Officer in Charge,
Marine Inspection, shall endorse the
Certificate of Inspection for U.S. flag
vessels, or the Certificate of Compliance for foreign flag vessels, that the
vessel is acceptable for collecting the
vapor from crude oil, gasoline blends,
and benzene, or any other vapor it is
found acceptable to collect.
[CGD 88–102, 55 FR 25446, June 21, 1990, as
amended by CGD 95–028, 62 FR 51200, Sept. 30,
1997; USCG-2004–18884, 69 FR 58345, Sept. 30,
2004]

Subpart 39.20—Design and
Equipment
§ 39.20–1 Vapor collection system—TB/
ALL.
(a) Each vapor collection system
must meet the following requirements:
(1) Except as allowed by paragraph
(a)(3) of this section or the Commandant (CG–522), vapor collection piping must be permanently installed,
with the vessel’s vapor connection located as close as practical to the loading manifold;
(2) If the vessel collects vapors from
incompatible cargoes simultaneously,
it must keep the incompatible vapors
separate throughout the entire vapor
collection system;

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Coast Guard, DHS

§ 39.20–3

(3) A vessel certified to carry cargo
listed in Table 151.05 of part 151 or
Table 1 of part 153 of this chapter may
have vapor connections located in the
vicinity of each tank in order to preserve segregation of cargo systems, in
lieu of common header piping;
(4) A means must be provided to
eliminate liquid condensate which may
collect in the system, such as draining
and collecting liquid from each low
point in the line;
(5) Vapor collection piping must be
electrically bonded to the hull and
must be electrically continuous; and
(6) An inerted tankship must have a
means to isolate the inert gas supply
from the vapor collection system. The
inert gas main isolation valve required
by SOLAS 74, as amended, chapter II–2,
Regulation 62.10.8 may be used to satisfy this requirement.
(b) The vapor collection system must
not interfere with the proper operation
of the cargo tank venting system.
(c) An isolation valve capable of
manual operation must be provided at
the vessel vapor connection. The valve
must have an indicator to show clearly
whether the valve is in the open or
closed position, unless the valve position can be readily determined from
the valve handle or valve stem.
(d) The last 1.0 meter (3.3 feet) of
vapor piping before the vessel vapor
connection must be:
(1) Painted red/yellow/red with:
(i) The red bands 0.1 meter (0.33 feet)
wide, and
(ii) The middle yellow band 0.8 meter
(2.64 feet) wide; and
(2) Labeled ‘‘VAPOR’’ in black letters
at least 50 millimeters (2 inches) high.
(e) Each vessel vapor connection
flange must have a permanently attached 0.5 inch diameter stud at least
1.0 inch long projecting outward from
the flange face. The stud must be located at the top of the flange, midway
between bolt holes, and in line with the
bolt hole pattern.
(f) Each hose used for transferring
vapors must:
(1) Have a design burst pressure of at
least 25 psig;
(2) Have a maximum allowable working pressure of at least 5 psig;

(3) Be capable of withstanding at
least 2.0 psi vacuum without collapsing
or constricting;
(4) Be electrically continuous with a
maximum resistance of ten thousand
(10,000) ohms;
(5) Have flanges with:
(i) A bolt hole arrangement complying with the requirements for 150
pound class ANSI B16.5 flanges, and
(ii) One or more 0.625 inch diameter
holes in the flange located midway between bolt holes and in line with the
bolt hole pattern;
(6) Be abrasion resistant and resistant to kinking; and
(7) Have the last 1.0 meter (3.3 feet) of
each end of the vapor hose marked in
accordance with paragraph (d) of this
section.
(g) Vapor hose handling equipment
must be provided with hose saddles
which provide adequate support to prevent kinking or collapse of hoses.
[CGD 88–102, 55 FR 25446, June 21, 1990, as
amended by CGD 95–072, 60 FR 50462, Sept. 29,
1995; CGD 96–041, 61 FR 50727, Sept. 27, 1996]

§ 39.20–3 Cargo gauging system—TB/
ALL.
(a) Each cargo tank of a tank vessel
that is connected to a vapor collection
system must be equipped with a cargo
gauging device which:
(1) Provides a closed gauging arrangement as defined in § 151.15.10 of
this chapter that does not require
opening the tank to the atmosphere
during cargo transfer;
(2) Allows the operator to determine
the liquid level in the tank for the full
range of liquid levels in the tank;
(3) Indicates the liquid level in the
tank at the location where cargo transfer is controlled; and
(4) If portable, is installed on the
tank during the entire transfer operation.
(b) Except when a tank barge complies with § 39.20–9(a) of this part, each
cargo tank of a barge must have a high
level indicating device that:
(1) Provides a visual indication of the
liquid level in the cargo tank when the
cargo level is within 1.0 meter (3.28
feet) of the tank top;
(2) Has the maximum liquid level permitted under § 39.30–1(e) of this part at
even keel conditions conspicuously and

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§ 39.20–7

46 CFR Ch. I (10–1–09 Edition)

permanently marked on the indicating
device; and
(3) Is visible from all cargo control
areas on the tank barge.

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§ 39.20–7 Tankship liquid overfill protection—T/ALL.
(a) Each cargo tank of a tankship
must be equipped with an intrinsically
safe high level alarm and a tank overfill alarm.
(b) The high level alarm and tank
overfill alarm required by paragraph
(a) of this section, if installed after
July 23, 1990 must:
(1) Be independent of each other;
(2) Alarm in the event of loss of
power to the alarm system or failure of
electrical circuitry to the tank level
sensor; and
(3) Be able to be checked at the tank
for proper operation prior to each
transfer or contain an electronic selftesting feature which monitors the
condition of the alarm circuitry and
sensor.
(c) The high level alarm required by
paragraph (a) of this section must:
(1) Alarm before the tank overfill
alarm, but no lower than 95 percent of
tank capacity;
(2) Be identified with the legend
‘‘High Level Alarm’’ in black letters at
least 50 millimeters (2 inches) high on
a white background; and
(3) Have audible and visible alarm indications that can be seen and heard on
the vessel where cargo transfer is controlled.
(d) The tank overfill alarm required
by paragraph (a) of this section must:
(1) Be independent of the cargo gauging system;
(2) Have audible and visible alarm indications that can be seen and heard on
the vessel where cargo transfer is controlled and in the cargo deck area;
(3) Be identified with the legend
‘‘TANK OVERFILL ALARM’’ in black
letters at least 50 millimeters (2
inches) high on a white background;
and
(4) Alarm early enough to allow the
person in charge of transfer operations
to stop the transfer operation before
the cargo tank overflows.
(e) If a spill valve is installed on a
cargo tank fitted with a vapor collec-

tion system, it must meet the requirements of § 39.20–9(c) of this part.
(f) If a rupture disk is installed on a
cargo tank fitted with a vapor collection system, it must meet the requirements of § 39.20–9(d) of this part.
§ 39.20–9 Tank barge
protection—B/ALL.

liquid

Each cargo tank of a tank barge
must have one of the following liquid
overfill protection arrangements.
(a) A system meeting the requirements of § 39.20–7 of this part which:
(1) Includes a self-contained power
supply;
(2) Is powered by generators installed
on the barge; or
(3) Receives power from a facility and
is fitted with a shore tie cable and a 120
volt 20 amp explosion-proof plug which
meets:
(i) ANSI/NEMA WD6;
(ii) NFPA 70, Articles 410–57 and 501–
12; and
(iii) § 111.105–9 of this chapter.
(b) An intrinsically safe overfill control system which:
(1) Is independent of the cargo gauging device required by § 39.20–3(a) of
this part;
(2) Actuates an alarm and automatic
shutdown system at the facility overfill control panel, or on the vessel to be
lightered if a lightering operation, 60
seconds before the tank becomes 100
percent liquid full;
(3) Is able to be checked at the tank
for proper operation prior to each loading;
(4) Consists of components which, individually or in series, will not generate or store a total of more than 1.2
V, 0.1 A, 25 mW, or 20 microjoules;
(5) Has at least one tank overfill sensor switch with normally closed contacts per cargo tank;
(6) Has all tank overfill sensor
switches connected in series;
(7) Has interconnecting cabling that
meets § 111.105–15(b) of this chapter; and
(8) Has a male plug with a 5 wire, 16
amp connector body meeting IEC 309–1/
309–2 which is:
(i) Configured with pins S2 and R1 for
the tank overfill sensor circuit, pin G
connected to the cabling shield, and
pins N and T3 reserved for an optional

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Coast Guard, DHS

§ 39.30–1

high level alarm circuit meeting the
requirements of this paragraph; and
(ii) Labeled ‘‘Connector for Barge
Overflow Control System’’ and with
the total inductance and capacitance of
the connected switches and cabling.
(c) A spill valve which:
(1) Meets ASTM F 1271 (incorporated
by reference, see § 39.10–5);
(2) Relieves at a pressure higher than
the pressure at which the pressure relief valves meeting the requirements of
§ 39.20–11 operate;
(3) Limits the maximum pressure at
the cargo tank top during liquid overfill, at the maximum loading rate for
the tank, to not more than the maximum design working pressure for the
tank; and
(4) If the vessel is in ocean or coastwise service, has provisions to prevent
opening due to cargo sloshing.
(d) A rupture disk arrangement
which meets paragraphs (c)(2), (c)(3)
and (c)(4) of this section and is approved by the Commandant (CG–522).
[CGD 88–102, 55 FR 25446, June 21, 1990, as
amended by CGD 95–072, 60 FR 50462, Sept. 29,
1995; CGD 96–041, 61 FR 50727, Sept. 27, 1996;
USCG-2000–7790, 65 FR 58459, Sept. 29, 2000]

erowe on DSK5CLS3C1PROD with CFR

§ 39.20–11 Vapor overpressure and vacuum protection—TB/ALL.
(a) The cargo tank venting system
required by § 32.55 of this chapter must:
(1) Be capable of discharging cargo
vapor at 1.25 times the maximum
transfer rate such that the pressure in
the vapor space of each tank connected
to the vapor collection system does not
exceed:
(i) The maximum design working
pressure for the tank, or
(ii) If a spill valve or rupture disk is
fitted, the pressure at which the device
operates;
(2) Not relieve at a pressure corresponding to a pressure in the cargo
tank vapor space of less than 1.0 psig;
(3) Prevent a vacuum in the cargo
tank vapor space, whether generated
by withdrawal of cargo or vapor at
maximum rates, that exceeds the maximum design vacuum for any tank connected to the vapor collection system;
and
(4) Not relieve at a vacuum corresponding to a vacuum in the cargo

tank vapor space of less than 0.5 psi
below atmospheric pressure.
(b) Each pressure-vacuum relief valve
must:
(1) Be tested for venting capacity in
accordance with paragraph 1.5.1.3 of
API 2000; and
(2) Have a means to check that the
device operates freely and does not remain in the open position, if installed
after July 23, 1991.
(c) The relieving capacity test required by paragraph (b)(1) of this section must be carried out with a flame
screen fitted at the vacuum relief opening and at the discharge opening if the
pressure-vacuum relief valve is not designed to ensure a minimum vapor discharge velocity of 30 meters (98.4 ft.)
per second.
§ 39.20–13 High and low vapor pressure protection for tankships—T/
ALL.
Each tankship vapor collection system must be fitted with a pressure
sensing device that senses the pressure
in the main vapor collection line,
which:
(a) Has a pressure indicator located
on the vessel where the cargo transfer
is controlled; and
(b) Has a high pressure and a low
pressure alarm that:
(1) Is audible and visible on the vessel
where cargo transfer is controlled;
(2) Alarms at a high pressure of not
more than 90 percent of the lowest
pressure relief valve setting in the
cargo tank venting system; and
(3) Alarms at a low pressure of not
less than four inches water gauge (0.144
psig) for an inerted tankship, or the
lowest vacuum relief valve setting in
the cargo tank venting system for a
non-inerted tankship.

Subpart 39.30—Operations
§ 39.30–1 Operational requirements—
TB/ALL.
(a) Vapor from a tank vessel may not
be transferred to:
(1) A facility in the United States
which does not have its letter of adequacy endorsed as meeting the requirements of 33 CFR part 154, subpart E; or
(2) In the case of a lightering or topping off operation, a vessel which does

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§ 39.30–1

46 CFR Ch. I (10–1–09 Edition)

not have its certificate of inspection or
certificate of compliance endorsed as
meeting the requirements of this part.
(b) The pressure drop through the
vapor collection system from the most
remote cargo tank to the vessel vapor
connection must be:
(1) Determined for each cargo handled by the vapor collection system at
the maximum transfer rate and at lessor transfer rates;
(2) Based on a 50 percent cargo vapor
and air mixture, and a vapor growth
rate appropriate for the cargo being
loaded; and
(3) Included in the vessel’s oil transfer procedures as a table or graph
showing the liquid transfer rate versus
the pressure drop.
(c) If a vessel carries vapor hoses, the
pressure drop through the hoses must
be included in the pressure drop calculations required by paragraph (b) of
this section.
(d) The rate of cargo transfer must
not exceed the maximum allowable
transfer rate as determined by the lesser of the following:
(1) Eighty (80) percent of the total
venting capacity of the pressure relief
valves in the cargo tank venting system when relieving at the set pressure
required by § 39.20–11(a) of this part;
(2) The total vacuum relieving capacity of the vacuum relief valves in the
cargo tank venting system when relieving at the set pressure required by
§ 39.20–11(a) of this part;
(3) The rate based on pressure drop
calculations at which, for a given pressure at the facility vapor connection,
or if lightering at the vapor connection
of the vessel receiving cargo, the pressure in any cargo tank connected to
the vapor collection system exceeds 80
percent of the setting of any pressure
relief valve in the cargo tank venting
system.
(e) A cargo tank must not be filled
higher than:
(1) 98.5 percent of the cargo tank volume; or
(2) The level at which an overfill
alarm complying with § 39.20–7 or
§ 39.20–9(b)(2) of this part is set.
(f) A cargo tank must not be opened
to the atmosphere during cargo transfer operations except as provided in
paragraph (g) of this section.

(g) A cargo tank may be opened to
the atmosphere for gauging or sampling while a tank vessel is connected
to a vapor control system if the following conditions are met:
(1) The cargo tank is not being filled;
(2) Except when the tank is inerted,
any pressure in the cargo tank vapor
space is first reduced to atmospheric
pressure by the vapor control system;
(3) The cargo is not required to be
closed or restricted gauged by Table
151.05 of part 151 or Table 1 in part 153
of this chapter; and
(4) For static accumulating cargo, all
metallic equipment used in sampling
or gauging is electrically bonded to the
vessel before it is put into the tank, remains bonded to the vessel until it is
removed from the tank, and if the tank
is not inerted, a period of 30 minutes
has elapsed since loading of the tank
was completed.
(h) For static accumulating cargo the
initial transfer rate must be controlled
in accordance with Section 7.4 of the
OCIMF, International Safety Guide for
Oil Tankers and Terminals, in order to
minimize the development of a static
electrical charge.
(i) If cargo vapor is collected by a facility that requires the vapor from the
vessel to be inerted in accordance with
33 CFR 154.820(a) or (b), the oxygen content in the vapor space of each cargo
tank connected to the vapor collection
system must not exceed 8 percent by
volume at the start of cargo transfer.
The oxygen content of each tank must
be measured at a point one meter (3.28
feet) below the tanktop and at a point
equal to one-half of the ullage. Where
tanks have partial bulkheads, the oxygen content of each area of that tank
formed by each partial bulkhead must
be measured at a point one meter (3.28
feet) below the tanktop and at a point
equal to one-half of the ullage.
(j) If the vessel is equipped with an
inert gas system, the isolation valve
required by § 39.20–1(a)(6) of this part
must remain closed during vapor transfer.
(k) Unless equipped with an automatic self-test and circuit monitoring
feature, each high level alarm and tank
overfill alarm required by § 39.20–7 or
§ 39.20–9 of this part, on a cargo tank
being loaded, must be tested at the

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Coast Guard, DHS

§ 39.40–5

tank for proper operation within 24
hours prior to the start of cargo transfer.
[CGD 88–102, 55 FR 25446, June 21, 1990; 55 FR
39270, Sept. 26, 1990]

Subpart 39.40—Lightering and
Topping-Off Operations with
Vapor Balancing
§ 39.40–1 General requirements
vapor balancing-TB/ALL.

for

(a) Except as provided in paragraph
(b) of this section, each vessel which
uses vapor balancing while conducting
a lightering or topping-off operation
must meet the requirements of this
subpart in addition to the requirements of subparts 39.10, 39.20, and 39.30
of this part.
(b) An arrangement to control vapor
emissions during a lightering or topping-off operation which does not use
vapor balancing must receive approval
from the Commandant (CG–522).
(c) A vapor balancing operation must
not use a compressor or blower to assist vapor transfer without approval
from the Commandant (CG–522).
(d) Vapor balancing is prohibited
when the cargo tanks on a vessel discharging cargo are inerted and the
cargo tanks on a vessel receiving cargo
are not inerted.
(e) A vessel which intends to engage
in a lightering or topping-off operation
while collecting cargo vapor from
other than crude oil, gasoline, or benzene must receive specific approval
from the Commandant (CG–522).

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[CGD 88–102, 55 FR 25446, June 21, 1990; 55 FR
39270, Sept. 26, 1990, as amended by CGD 95–
072, 60 FR 50462, Sept. 29, 1995; CGD 96–041, 61
FR 50727, Sept. 27, 1996]

§ 39.40–3 Design and equipment for
vapor balancing—TB/ALL.
(a) If the cargo tanks on a vessel discharging cargo and a vessel receiving
cargo are inerted, the service vessel
must:
(1) Have a means to inert the vapor
transfer hose prior to transferring
cargo vapor; and
(2) Have an oxygen analyzer with a
sensor or sampling connection fitted
within 3 meters (9.74 ft.) of the vessel
vapor connection which:

(i) Activates an audible and visible
alarm at a location on the service vessel where cargo transfer is controlled
when the oxygen content in the vapor
collection system exceeds 8 percent by
volume;
(ii) Has an oxygen concentration indicator located on the service vessel
where the cargo transfer is controlled;
and
(iii) Has a connection for injecting a
span gas of known concentration for
calibration and testing of the oxygen
analyzer.
(b) If the cargo tanks on a vessel discharging cargo are not inerted, the
vapor collection line on the service
vessel must be fitted with a detonation
arrester that meets the requirements
of 33 CFR 154.822(a) located within 3
meters (9.74 ft.) of the vessel vapor connection.
(c) An electrical insulating flange or
one length of non-conductive hose
must be provided between the vessel
vapor connection on the service vessel
and the vapor connection on the vessel
being lightered or topped-off.
§ 39.40–5 Operational requirements for
vapor balancing—TB/ALL.
(a) During a lightering or topping-off
operation each cargo tank being loaded
must be connected by the vapor collection system to a cargo tank which is
being discharged.
(b) If the cargo tanks on both the
vessel discharging cargo and the vessel
receiving cargo are inerted, the following requirements must be met:
(1) Each tank on a vessel receiving
cargo which is connected to the vapor
collection system must be tested prior
to cargo transfer to ensure that the oxygen content in the vapor space does
not exceed 8 percent by volume. The
oxygen content of each tank must be
measured at a point one meter (3.28
feet) below the tanktop and at a point
equal to one-half of the ullage. Where
tanks have partial bulkheads, the oxygen content of each area of that tank
formed by each partial bulkhead must
be measured at a point one meter (3.28
feet) below the tanktop and at a point
equal to one-half of the ullage;

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§ 39.40–5

46 CFR Ch. I (10–1–09 Edition)

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(2) The oxygen analyzer required by
§ 39.40–3(a) must be tested for proper operation prior to the start of each transfer operation;
(3) The oxygen content of vapors
being transferred must be continuously
monitored during the transfer operation;
(4) Cargo transfer must be terminated if the oxygen content exceeds 8
percent by volume and must not be restarted until the oxygen content in the
tanks of the vessel receiving cargo is
reduced to 8 percent by volume or less;
and
(5) The vapor transfer hose must be
purged of air and inerted prior to starting vapor transfer.
(c) The isolation valve, required by
§ 39.20–1(c) of this part, located on the
service vessel must not be opened until
the pressure in the vapor collection
system on the vessel receiving cargo
exceeds the pressure in the vapor col-

lection system on the vessel discharging cargo.
(d) The cargo transfer rate must be
controlled from the vessel discharging
cargo, and must not exceed the maximum allowable transfer rate for the
vessel receiving cargo.
(e) The pressure in the vapor space of
any cargo tank connected to the vapor
collection line on either the vessel receiving cargo or the vessel discharging
cargo must not exceed 80 percent of the
lowest setting of any pressure relief
valve during ballasting or cargo transfer.
(f) All impressed current cathodic
protection systems must be deenergized during cargo transfer operations.
(g) Tank washing is prohibited unless
the cargo tanks on both the vessel discharging cargo and the vessel receiving
cargo are inerted or the tank is isolated from the vapor collection line.
[CGD 88–102, 55 FR 25446, June 21, 1990; 55 FR
39270, Sept. 26, 1990]

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INDEX
SUBCHAPTER D—TANK VESSELS
EDITORIAL NOTE: This listing is provided for informational purposes only. It is compiled and
kept current by the U.S. Coast Guard, Department of Homeland Security. This index is updated as of October 1, 2009.
Part, subpart, or section

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A
Accident or casualty report ................................................................. Subpart 35.15
Accommodations for crew.................................................................... Subpart 32.40
Application .................................................................................................. 32.40-1
Construction............................................................................................... 32.40-15
Heating and cooling.................................................................................... 32.40-50
Hospital space............................................................................................. 32.40-35
Insect screens ............................................................................................. 32.40-55
Location of Crew spaces ............................................................................. 32.40-10
Messrooms .................................................................................................. 32.40-30
On tankships constructed before June 15, 1987 ........................................... 32.40-65
On tankships of less than 100 gross tons and manned tank barges ............. 32.40-60
Other spaces ............................................................................................... 32.40-40
Sleeping Accommodations.......................................................................... 32.40-20
Washrooms and toilet rooms ...................................................................... 32.40-25
Aids to Navigation:
Charts or information regarding.................................................................. 35.20-1
Coast pilots .................................................................................................. 35.20-1
Current tables .............................................................................................. 35.20-1
Light lists .................................................................................................... 35.20-1
Nautical publications................................................................................... 35.20-1
Notice to Mariners ....................................................................................... 35.20-1
Sailing directions......................................................................................... 35.20-1
Tide tables ................................................................................................... 35.20-1
Air compressor ................................................................................. 32.35-15, 35.35-85
Alarm bells ........................................................................................................ 32.25
Marking required ......................................................................................... 35.40-5
Switches, markings of.................................................................................. 35.40-1
Alarm systems ..................................................................................... Subpart 32.25
Alcohol or drugs, used by crew ...................................................................... 35.05-25
Alterations and repairs, regulations governing ............................... 30.01-10, 31.10-25
American Bureau of Shipping ......................................................................... 31.10-1
Anniversary date........................................................................................... 30.10-2a
Annual inspection:
Application for: .......................................................................................... 31.01-15
Fire extinguishers ...................................................................................... 31.10-18
Anode installations, sacrificial ..................................................................... 35.01-25
Application for inspection................................................................ 31.01-15, 31.01-20
Application, electrical installations Subpart .................................................... 32.45
Application of regulations:
Governing alterations and repairs.............................................................. 30.01-10
Vessels on an international voyage ............................................................. 30.01-6

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46 CFR Ch. I (10–1–09 Edition)
Approved, definition........................................................................................ 30.10-3
Arresters, flame................................................................................ 30.10-23, 32.20-10
Assignment of functions ................................................................................ 31.01-10
Auto pilot ...................................................................................................... 35.20-45
Auxiliary machinery:
Construction ................................................................................................ 32.35-1
Design .......................................................................................................... 32.35-1
Installation of internal combustion engine ................................................. 32.35-5
Axes, fire .............................................................................................. 34.05-20, 34.60

B
Bell, alarm Subpart ........................................................................................... 32.25
Bell signals...................................................................................................... 32.30-5
Bilge systems Subpart ....................................................................................... 32.52
Bills of lading required .................................................................................. 35.01-10
Boilerroom, fire extinguishing systems for .................................................... 34.05-5
Boilers:
Accident report by chief engineer ................................................................ 35.25-5
Examination by engineer ............................................................................. 35.25-1
Safety rules for fires .................................................................................... 35.30-5
Breathing apparatus, fresh air ......................................................... 35.30-20, 35.40-20
Butterworth plates, safety rules regarding ................................................... 35.30-10

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C
Carbon dioxide extinguishing systems:
Alarms ........................................................................................................ 34.15-30
Amount of carbon dioxide required.............................................................. 34.15-5
Application .................................................................................................. 34.15-1
Controls ...................................................................................................... 34.15-10
Discharge outlets........................................................................................ 34.15-25
Dry cargo spaces .......................................................................................... 34.15-5
Enclosed ventilation systems for rotating electrical propulsion equipment ....................................................................................................... 34.15-5
Enclosure openings ..................................................................................... 34.15-35
Installation contracted for prior to January 1, 1962 ................................... 34.15-90
Machinery spaces pumprooms paint lockers and similar spaces ................. 34.15-5
Piping ......................................................................................................... 34.15-15
Pressure relief ............................................................................................ 34.15-40
Quantity, pipe sizes, and discharge rates ..................................................... 34.15-5
Storage ....................................................................................................... 34.15-20
Total available supply ................................................................................. 34.15-5
Cargo definition .............................................................................................. 30.10-5
Cargo discharge............................................................................................... 32.50-3
Cargoes elevated temperatures...................................................................... Part 36
Cargoes regulated................................................................................. Subpart 30.25
Cargo gear certificates or registers ............................................................... 31.10-16
Cargo gear inspection .................................................................................... 31.10-16
Cargo handling:
Equipment maintenance............................................................................. 35.35-70
General ........................................................................................................... 35.35
Liquefied petroleum gases ................................................................ Subpart 38.15
Loading information....................................................................................... 35.35
Safety requirements ....................................................................................... 35.30
Unmanned tank barges ................................................................................ 35.35-1
Cargo handling room, definitions.................................................................... 30.10-6
Cargo hose ............................................................................ 35.35-15, 35.35-70, 38.15-5
Cargo piping .................................................................................................. 38.10-10

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Subchapter D Index
Cargo pumps......................................................................................... Subpart 32.50
Cargo pump relief valves................................................................................. 36.10-1
Cargo pump, testing of .................................................................................. 35.35-70
Cargo tank hatches, ullage holes and Butterworth plates, safety rules regarding .................................................................................................... 35.30-10
Cargo tanks:
Construction and testing of ................................ 32.60-40, 32.65-40, 32.70-25, 32.75-10
Design and installation of............................................................................... 38.05
Electric bonding and grounding of ............................................................. 32.75-15
Filling densities ........................................................................................... 38.15-1
Fire extinguishing systems for .................................................................... 34.05-5
Hydrostatic test of ....................................................................................... 38.25-1
Installation for carrying liquids at elevated temperatures ......................... 36.05-1
Independent...................................................................... 32.60-30, 32.65-30, 32.75-10
Liquefied petroleum gases .......................................................................... Part 38
Liquid level gauging devices ......................................................... 38.10-20, 32.20-20
Marking of ................................................................................................... 38.05-5
Periodic test................................................................................................. 38.25-1
Piping ........................................................................................................ .38.10-10
Refrigeration system used with.................................................................. 38.05-25
Removal from service .................................................................................. 38.25-5
Venting of .................................................................. Subpart 32.55, 38.20-1, 38.20-5
Cargo transfer:
Approval of ................................................................................................. 35.35-25
Conditions affecting ................................................................................... 35.35-40
Connecting of cargo hose ............................................................................ 35.35-15
Declaration of inspection ........................................................................... 35.35-30
Duties of senior deck officer....................................................................... 35.35-35
Electric bonding........................................................................................... 35.35-5
Filling densities ........................................................................................... 38.15-1
Handling of packaged goods, etc................................................................. 35.35-55
Inspection prior to..................................................................................... 35.35-2 0
Liquefied flammable gases ........................................................................... 38.15-5
Maintenance of equipment ......................................................................... 35.35-70
Men on duty ................................................................................................. 35.35-1
Tank barges ................................................................................................ 35.35-60
Termination of ........................................................................................... 35.35-50
Towing vessels furnishing steam, air or electricity ................................... 35.35-45
Vapor control systems................................................................................ Part 39
Vessels coming alongside during ................................................................ 35.35-42
Carriage of person other than crew ............................................................... 35.01-15
Casualty or accident report ................................................................. Subpart 35.15
Certificate of class .......................................................................................... 31.10-5
Certificate of inspection:
Application for .............................................................................. 31.01-15, 31.01-20
Cargoes of elevated temperatures, carriage of ............................................. 36.01-5
Delivery of ................................................................................................... 31.05-1
Endorsed for liquefied flammable gas .......................................................... 38.01-5
Indication of water traveled on.................................................................... 31.20-1
Ocean or unlimited coastwise vessels on inland and Great Lakes
Routes-TB/OC......................................................................................... 30.01-7
Posting of ..................................................................................................... 31.05-5
Terms, endorsements.................................................................................. 31.05-15
Validity .................................................................................................... 31.10-17a
Certificates regarding shipboard cargo gear.................................................. 31.10-16
Certificates under International Convention for Safety of Life at
Sea ............................................................................................................... 31.40
1960 American Bureau of Shipping.............................................................. 31.40-45

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46 CFR Ch. I (10–1–09 Edition)
Application .................................................................................................. 31.40-1
Cargo Ship Safety Construction Certificate. ............................................... 31.40-5
Cargo Ship Safety Equipment Certificate .................................................. 31.40-10
Cargo Ship Safety Radiotelegraphy Certificate ......................................... 31.40-15
Duration of Convention Certificate ............................................................ 31.40-40
Exemption Certificate ................................................................................ 31.40-25
Posting of Convention Certificates............................................................. 31.40-35
Certified crewmembers ................................................................................... 31.15-1
Certified definition ......................................................................................... 30.10-7
Charts of navigable waters required ............................................................... 35.20-1
Chief Engineer:
Repairs of boilers and unfired pressure vessels and reports or accidents....................................................................................................... 35.25-5
Class, certificate of ......................................................................................... 31.10-5
Classification requirements, definition .......................................................... 30.10-9
CO2 fire apparatus, marking required............................................................ 35.40-10
Coast Guard District Commander ................................................................. 30.10-19
Coast pilots ..................................................................................................... 35.20-1
Coastwise, definition ..................................................................................... 30.10-11
Cofferdam:
Definition of ............................................................................................... 30.10-13
Location of ....................................................................... 32.60-10, 32.65-15, 32.70-10
Requirements of ......................................................................................... 32.70-10
Venting of ................................................................................................... 32.55-45
Combustible gas indicator ............................................................................. 35.30-15
Combustible liquids, definition ..................................................................... 30.10-15
Commandant, definition................................................................................ 30.10-17
Commodities regulated ........................................................................ Subpart 30.25
Communication, interior system ......................................................... Subpart 32.30
Construction and testing of cargo tanks and bulkheads on tank vessels ................................................................................ 32.65-40, 32.60-40, 32.75-10
Construction of tank barges of materials other than steel or iron, requirements ................................................................................................ 32.80-1
Construction of tank vessels:
Cargo spaces segregated from cargo tanks ........................................ 32.57-10, 32.60
Ceilings ........................................................................................................ 32.57-1
Deck ........................................................................................................... 32.57-10
Enclosed spaces .......................................................................................... 32.60-10
General cargo spaces .................................................................................. 32.60-15
Hatch covers ............................................................................................... 32.57-10
Hull requirements................................................................ 32.60, 32.65, 32.70, 32.75
Lamp Lockers............................................................................................. 32.57-10
Living quarters.............................................................................. 32.60-25, 32.65-25
Location of cargo tank spaces .................................................................... 32.60-10
Location of independent .................................................................... tanks32.60-30
Machinery ................................................................................................... .32.35-1
Paint lockers .............................................................................................. 32.57-10
Requirements for scantlings, material and workmanship ..... 32.60-1, 32.65-1, 32.705, 32.75-5
Segregation of cargo................................................................................... 32.60-10
Stowage spaces ........................................................................................... 32.60-10
Subdivision of cargo space .............................................................. 32.60-5, 32.65-10
Testing of cargo tanks and bulkheads.............................. 32.60-40, 32.65-40, 32.75-10
Construction of vessels for liquefied gases...................................................... 38.05-1
Construction of wood hull tank vessels:
Application of regulations ........................................................................... 32.75-1
Electric bonding and grounding of cargo tanks.......................................... 32.75-15
Hold spaces ................................................................................................. 32.75-20

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Subchapter D Index
Independent cargo tanks ............................................................................ 32.75-10
Convention certificates........................................................................ Subpart 31.40
Conversion of vessels to tank vessels ............................................................ 31.10-10
Crew:
Certified members of.................................................................................... 31.15-1
Illness of ..................................................................................................... 35.05-25
Licensed officers .......................................................................................... 31.15-1
Physical condition of.................................................................................. 35.05-20
Required for cargo handling......................................................................... 35.35-1
Crew accommodations:
Inspection of ............................................................................................... 31.10-45
Requirements for .............................................................................. Subpart 32.40
Sanitary condition of ................................................................................... 35.01-5
Current tables ................................................................................................. 35.20-1

D
Deck foam system ................................................................................ Subpart 34.20
Declaration of inspection prior to bulk cargo transfer ................................. 35.35-30
Definitions ........................................................................................... Subpart 30.10
Delivery of certificate of inspection ............................................................... 31.05-1
Design:
Cargo tanks .................................................................................................. 38.05-2
Main and auxiliary machinery..................................................................... 32.35-1
Vapor control system........................................................................ Subpart 39.20
Devices, spark producing ............................................................................... 35.30-35
Display of Plans .............................................................................................. 35.10-3
Draft marks......................................................................................... 32.05-1, 35.20-5
Drills:
Boat.............................................................................................................. 35.10-5
Fire .............................................................................................................. 35.10-5
Line throwing appliance .............................................................................. 35.10-1

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E
Effective date of regulation........................................................................... 30.01-15
Electric bonding and grounding......................................................... 32.75-15, 35.35-5
Electrical installations............................................................................. 31.35, 32.45
Elevated temperature cargoes:
Cargo pump relief valves.............................................................................. 36.10-1
Certificate of inspection .............................................................................. 36.01-5
Flame Screens, vents and ventilations ........................................................ 36.20-1
Installation of cargo tanks .......................................................................... 36.05-1
Lagged tanks, periodic inspections .............................................................. 36.30-1
Protection of personnel .............................................................................. 36.05-10
Ventilation of pumproom................................................................................ 36.20-5
Emergency:
Authority of senior officer ......................................................................... 35.35-75
Breathing equipment, marking .................................................................. 35.40-20
Lighting and power systems ....................................................................... 35.10-15
Outfit .......................................................................................................... 35.30-20
Repairs to firefighting equipment .............................................................. 35.01-35
Signals ......................................................................................................... 35.10-5
Training ....................................................................................................... 35.10-1
Enclosed ventilating system, fire extinguishing system ................................ 34.05-5
Engineering, electrical ............................................................................. 31.35, 32.45
Engineering, marine Subpart ............................................................................ 31.30
Equipment:
Cargo handling .................................................................................. Subpart 32.50

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46 CFR Ch. I (10–1–09 Edition)
Emergency.................................................................................................. 35.30-20
Fire and emergency, marking.............................................. Subpart 35.40, 35.40-40
Installed but not required ............................................................................ 34.01-5
Portable electrical...................................................................................... 35.30-30
Previously approved ................................................................................... 30.01-15
Equipment installations ...................................................................... Subpart 32.20
Equipment installations on vessels during World War II................................ 32.20-1
Equipment, navigation ........................................................................ Subpart 32.15
Equivalents ..................................................................................................... 30.15-1
Escape, means of ............................................................................................. 32.02-1
Examination of sea chests, sea valves, sea strainers, and bilge injection
valves....................................................................................................... 31.10-20
Exemption certificate.................................................................................... 31.40-25
Explosives, transportation of ........................................................................ 35.30-25

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Fire axes ............................................................................................... 34.05-20, 34.60
Location of ................................................................................................. 34.60-10
Number required .......................................................................................... 34.60-5
Fire drills ........................................................................................................ 35.10-5
Fire extinguishers, portable and semiportable:
Application .................................................................................................. 34.50-1
Classification. .............................................................................................. 34.50-5
Location ..................................................................................................... 34.50-10
Spare charges ............................................................................................. 34.50-15
Vessels contracted for prior to January 1, 1962 .......................................... 34.50-90
Fire extinguishing deck foam system:
Application .................................................................................................. 34.20-1
Area protected ............................................................................................. 34.20-5
Cargo area definitions .................................................................................. 34.20-3
Controls ...................................................................................................... 34.20-10
Discharge outlets........................................................................................ 34.20-20
Installations contracted for prior to January 1, 1970.................................. 34.20-90
Marking ...................................................................................................... 35.40-10
Piping ......................................................................................................... 34.20-15
Quantity of foam required ........................................................................... 34.20-5
Rate of application....................................................................................... 34.20-5
Separate supply of foam-producing material ............................................... 34.20-5
Supply of foam producing material.............................................................. 34.20-5
Water supply ................................................................................................ 34.20-5
Fire extinguishing fixed foam systems:
Additional protection required................................................................... 34.17-25
Application .................................................................................................. 34.17-1
Area protected ............................................................................................. 34.17-5
Controls ...................................................................................................... 34.17-10
Discharge outlets........................................................................................ 34.17-20
Installations contracted for prior to January 1, 1962.................................. 34.17-90
Piping ......................................................................................................... 34.17-15
Rate of Application ...................................................................................... 34.17-5
Separate supply of foam-producing material ............................................... 34.17-5
Supply of foam producing material.............................................................. 34.17-5
Water supply for required pumps ................................................................. 34.17-5
Fire extinguishing systems:
Boilerrooms.................................................................................................. 34.05-5
Carbon dioxide ................................................................................................ 34.15
Cargo tanks .................................................................................................. 34.05-5
Dry cargo compartments ............................................................................. 34.05-5

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Subchapter D Index
Enclosed ventilating systems ...................................................................... 34.05-5
Foam, deck........................................................................................ Subpart 34.20
Foam, fixed ....................................................................................... Subpart 34.17
Installations contracted for prior to January 1, 1962.................................. 34.10-90
Lamp, paint lockers and similar pages ........................................................ 34.05-5
Machinery spaces ......................................................................................... 34.05-5
Marking ...................................................................................................... 35.40-10
Piping ......................................................................................................... 34.10-15
Pumprooms .................................................................................................. 34.05-5
Fire extinguishing system, steam smothering:
Application .................................................................................................. 34.13-1
Installations contracted for prior to January 1, 1962.................................. 34.17-90
Firefighting equipment:
Application .................................................................................................. 34.01-1
Fire axes ............................................................................................ 34.05-20, 34.60
Fire main system ......................................................................................... 34.05-1
Hose ............................................................................................................ 34.10-10
Nozzles ........................................................................................................ 35.40-10
Hydrants ..................................................................................................... 35.40-15
Installed but not required ............................................................................ 34.01-5
Portable, vessel’s name on ......................................................................... 35.40-40
Protection for unusual arrangements or special products ......................... 34.01-10
Testing and inspection .................................................................. 31.10-18, 31.10-19
Fire main system:
Application .................................................................................................. 34.10-1
Fire pumps ................................................................................................... 34.10-5
Fire station hydrants hose and nozzles ...................................................... 34.10-10
Fire, matches and smoking safety rules ......................................................... 35.30-5
Fire protection, structu1ral, for tank vessels contracted for on or after
January 1, 1963 ............................................................................... Subpart 32.57
Fire protection, structural for ships with a keel laying date on or after
January 1, 1975 ............................................................................... Subpart 32.56
Fire station ................................................................................................... 34.10-10
Fitting and piping for liquefied petroleum gases .......................................... 38.10-10
Fittings, cargo ..................................................................................... Subpart 32.50
Flame arresters ................................................................................ 30.10-23, 32.20-10
Flame screen...................................................................................... 30.10-25, 36.20-1
Flammable liquid, definition......................................................................... 30.10-22
Flammable liquid and gas fuels as ships’ stores ............................................ 35.30-40
Flammable or inflammable, definition.......................................................... 30.10-21
Flashpoint, definition.................................................................................... 30.10-27
Foam hose/monitor stations .......................................................................... 35.40-17
Fresh air breathing apparatus.......................................................... 35.30-20, 35.40-20
Fuel oil, requirements ................................................................................... 35.25-10
Fuels, flammable liquid and gas .................................................................... 35.30-40
Functions, assignment of ................................................................................ 30.01-3

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Galley fires, safety rules ................................................................................. 35.30-5
Gangway signs ................................................................................................ 35.30-1
Gas chemist certified by American Bureau of Shipping ................................. 35.01-1
Gas free, definition ........................................................................................ 30.10-29
Gauge, liquid level ................................................................ 32.20-20, 38.10-20, 39.20-3
Gear, shipboard cargo, certificates or registers ............................................ 31.10-16
General alarm switch, marking of .................................................................. 35.40-1
General alarm systems:
Alarm bells for tankships constructed on or after September 15,
1943 ......................................................................................................... 32.25-1

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46 CFR Ch. I (10–1–09 Edition)
Alarm bells for tankships constructed prior to September 15, 1943.............. 32.25-1
Alarm bells for manned barges .................................................................... 32.25-1
General rules and regulations ....................................................................... 30.10-31
Grade D, combustible liquid .......................................................................... 30.10-15
Grade E, combustible liquid .......................................................................... 30.10-15
Great Lakes ................................................................................................... 30.10-33

H
Hauling out or drydocking ............................................................................ 31.10-20
Headquarters ................................................................................................. 30.10-35
Hose, cargo .................................................................................................... 32.50-30
Hospital accommodations ............................................................................. 32.40-35
Hull and cargo tank requirements:
Alternative arrangements............................................................................ 32.63-8
Application .................................................................................................. 32.63-1
Barge hull classifications............................................................................. 32.63-5
Cargo tanks and supports ........................................................................... 32.63-25
Hull structure ............................................................................................. 32.63-20
Rakes and coamings ................................................................................... 32.63-10
Hull requirements................................................. 32.60, 32.63, 32.65, 32.70, 32.75, 32.80
Hydrostatic test for cargo tanks..................................................................... 38.25-1

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I
Independent cargo tanks............................ 32.60-30, 32.60-35, 32.65-30, 32.70-25 32.75-10
Inert gas system................................................................................... Subpart 32.53
Inspection:
Alternations and repairs............................................................................. 31.10-25
Bilges .......................................................................................................... 31.10-50
Certificate of ..................................................................................... Subpart 31.05
Conversion of a vessel to a tank vessel, application for ............................. 31.01-20
Crew accommodations ................................................................................ 31.10-45
During trial trip ......................................................................................... 31.10-40
General requirements ....................................................................... Subpart 31.01
Initial, scope of ............................................................................................ 31.01-5
Lagged tanks................................................................................................ 36.30-1
New tank vessel .............................................................................. 31.01-20, 31.10-5
Plans and specifications............................................................................... 31.10-5
Recognized classification society ................................................................ 31.10-1
Required ....................................................................................................... 31.01-1
Required before making repairs ................................................................... 35.01-1
Required, liquefied, petroleum gas tanks .................................................... 38.25-1
Required on new tank vessels ...................................................................... 31.01-1
Safety valves .............................................................................................. 38.25-10
Two years ...................................................................................... 31.10-15, 31.10-17
Inspection and certification of cargo gear..................................................... 31.10-16
Inspection and test, periodic, of independent cargo tanks ................................ 38.25
Inspection of cargo gear:
Certification ............................................................................................... 31.10-16
Installation of cargo tanks ............................................................................ 38.05-10
Installation of internal combustion engines ................................................... 32.35-5
Installations made during the Unlimited National Emergency ...................... 32.20-1
Internal combustion installations, fire extinguishing systems ...................... 34.05-5
International voyage....................................................................................... 30.01-6
Interior communications system:
Bell signals between engineroom and pilothouse......................................... 32.30-5
Inspection of ................................................................................................... 32.30
Telegraph systems .......................................................................................... 32.30

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Subchapter D Index
Telephone equipment ................................................................................... 32.30-1
Voice tubes................................................................................................... 32.30-1
Issuance of certificates of inspection .............................................................. 31.05-1

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L
Lakes, bays and sounds ................................................................................. 30.10-41
Lamp and paintrooms:
Fire extinguishing system for...................................................................... 34.05-5
Fireproofing of ............................................................................................. 32.85-1
Licensed officers required ............................................................................... 31.15-1
Lifeboat drills ................................................................................................. 35.10-5
Lifesaving Appliances and Approaches ................................................ Subpart 31.36
Actions to be required ................................................................................ 35.07-10
Certificate of inspection regulation ............................................................. 31.05-1
Drills ............................................................................................................ 35.10-1
Inspections required..................................................................................... 31.01-1
Musters ........................................................................................................ 35.10-5
Lights, flashing the ray of ............................................................................. 35.20-30
Light List........................................................................................................ 35.20-1
Liquid, flammable ......................................................................................... 30.10-22
Liquid level gauging devices ...................................... 32.20-20, 38.10-1, 38.10-20 39.20-3
Liquefied flammable gas................................................................................ 30.10-39
Cargo hose .................................................................................................... 38.15-5
Cargo piping ............................................................................................... 38.10-10
Certificate of inspection .............................................................................. 38.01-5
Design and construction of cargo tanks....................................................... 38.05-2
Design and construction of nonpressure vessel type cargo tanks ................ 38.05-4
Design and construction of pressure vessel type cargo tanks ...................... 38.05-3
Design and construction of vessels, general................................................. 38.05-1
Electrical installations .............................................................................. 38.15-15
Filling and discharge pipes .......................................................................... 38.10-5
Filling of tanks ............................................................................................ 38.15-1
Installation of cargo tanks ......................................................................... 38.05-10
Insulation ................................................................................................... 38.05-20
Leak detection systems .............................................................................. 38.15-10
Liquid level gauging devices....................................................................... 38.10-20
Markings ...................................................................................................... 38.05-5
Refrigerated systems .................................................................................. 38.05-25
Remote shutdowns...................................................................................... 38.15-20
Removal of defective tanks.......................................................................... 38.25-5
Safety relief valves..................................................................................... 38.25-10
Safety relief valves for pressure vessel type tanks..................................... 38.10-15
Scope of regulations..................................................................................... 38.01-1
Tests and inspections. .................................................................................. 38.25-1
Transportation of ....................................................................................... Part 38
Transportation of portable cylinders or portable tanks containing or
having previously contained liquefied flammable gases in dry cargo
spaces ..................................................................................................... 38.01-2
Valves, fittings, and accessories .................................................................. 38.10-1
Vapor control system ................................................................................. Part 39
Ventilation ................................................................................................. 38.20-10
Venting............................................................................................. 38.20-1, 38.20-5
Living quarters................................................................................. 32.60-25, 32.65-25
Load lines............................................................................................. Subpart 31.25
Loading information...................................................................................... 31.10-32
Logbook entries:
Actions required to be logged ..................................................................... 35.07-10

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46 CFR Ch. I (10–1–09 Edition)
Application .................................................................................................. 35.07-1
Draft of tank ship ........................................................................................ 35.20-5
Fire and lifeboat drills ................................................................................. 35.10-5
Fuel oil requirements ................................................................................. 35.25-10
Logbooks and records................................................................................... 35.07-5
Steering gear tests ..................................................................................... 35.20-10

M
Machinery spaces, fire extinguishing systems for .......................................... 34.05-5
Machinery, main and auxiliary:
Accident report by chief engineer ................................................................ 35.25-5
Air compressors .......................................................................................... 32.35-15
Construction ................................................................................................ 32.35-1
Design .......................................................................................................... 32.35-1
Examination by engineer ............................................................................. 32.25-1
Installation of internal combustion engines ................................................ 32.35-5
Steering apparatus ..................................................................................... 32.35-10
Maneuvering characteristics, display of........................................................ 35.20-40
Manning:
Tank vessels........................................................................................ 31.15, 35.35-1
Marine engineering and material specifications.................................. Subpart 31.30
Marine inspector, authority of ...................................................................... 31.01-10
Markings:
CO2 alarm ..................................................................................................... 35.40-7
Draft marks ................................................................................................. 32.05-1
Emergency breathing apparatus................................................................. 35.40-20
Emergency lights ......................................................................................... 35.40-6
Fire and emergency equipment......................................................... Subpart 35.40
Firehose stations ........................................................................................ 35.40-15
General alarm bell ....................................................................................... 35.40-5
General alarm bell switch ............................................................................ 35.40-1
Lifesaving equipment ................................................................................. 35.40-40
Portable fire extinguishers......................................................................... 35.40-25
Steam, foam or CO2 apparatus.................................................................... 35.40-10
Steering station.......................................................................................... 35.40-35
Tanks for liquefied flammable gas, marking of ........................................... 38.05-5
Vapor control system piping ........................................................................ 39.20-1
Vessel’s name ................................................................................ 32.05-10, 32.05-15
Vessel’s name on equipment ........................................................................ 32.05-5
Master:
Casualty or accident report ......................................................................... 35.15-1
Licensed officer ............................................................................................ 35.05-1
Station bills and muster list ............................................................ 35.10-1, 35.10-5
Master’s and officer’s responsibility.............................................................. 35.20-20
Matches:
Use of ........................................................................................................... 35.30-5
Materials specification ........................................................................ Subpart 31.30
Material, scantlings and workmanship ............................................... 32.60-1, 32.65-1
Means of escape............................................................................................... 32.02-1
Muster list........................................................................................... 35.10-1, 35.10-5

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Nautical publications...................................................................................... 35.20-1
Navigation, use of Auto Pilot ........................................................................ 35.20-45
Navigation equipment:
Anchors for seagoing barges ....................................................................... 32.15-15
Magnetic compass and gyro compass ......................................................... 32.15-35

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Subchapter D Index
Radar .......................................................................................................... 32.15-30
Sounding machines..................................................................................... 32.15-10
Whistles ....................................................................................................... 32.15-5
New tank vessels, inspection of ...................................................................... 31.10-5
New tank vessels, plans for inspection of ................................................... 31.10-5(a)
Notice to mariners .......................................................................................... 35.20-1

O
Ocean, definition ........................................................................................... 30.10-45
Officer in Charge, Marine Inspection............................................................. 30.10-47
Officers required on tank vessels ......................................................... Subpart 35.05
Open hopper type barges................................................................................ 35.01-45
Overfill protection, liquid, tank barge ............................................................ 39.20-9
Overfill protection, liquid, tank ship .............................................................. 39.20-7
Overpressure and vacuum protection, vapor, tank barge and ship ................ 39.20-11
Oxygen breathing apparatus, marking of ...................................................... 35.40-20

P
Paint lockers .......................................................................... Subparts 32.85, 34.05-5
Period covered by certificate of inspection ................................................... 31.05-10
Permit definition........................................................................................... 30.10-49
Permit to proceed to another port for repairs ............................................... 31.10-35
Piping:
Fire extinguishing systems ..... 34.10-10, 34.10-15, 34.10-90, 34.15-15, 34.17-15, 34.20-15,
34.25-15
Piping, bilge .................................................................................................... 32.52-5
Piping, cargo ........................................................................................ Subpart 32.50
Cargo tanks ................................................................................................ 38.10-10
Steering apparatus ..................................................................................... 32.35-10
Plans, Display of ............................................................................................. 35.10-3
Plans for inspection of new tank vessels .................................................... 31.10-5(a)
Portable and semiportable extinguishers ............................................. 34.05-10, 34.50
Portable electrical equipment ....................................................................... 35.30-30
Posting of certificate of inspection................................................................. 31.05-5
Pressure-vacuum relief valve............................................................. 30.10-55, 32.20-5
Protection for personnel................................................................................ 36.05-10
Pumprooms:
Electrical installations .............................................................................. 32.60-20
Fire extinguishing systems for .................................................................... 34.05-5
Lighting...................................................................................................... 32.60-20
Location of .................................................................................... 32.60-20, 32.65-20
Requirements for........................................................................... 32.70-15, 32.70-20
Ventilation ..................................................................................... 32.60-20, 36.20-5
Pumps, bilge ...................................................................................... 32.60-20, 36.20-5
Pumps, cargo ..................................................................................................... 32.50

Q
Quarters, living ................................................................................ 32.60-25, 32.65-25

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Radar ............................................................................................................. 32.15-30
Radio room warning signs............................................................................... 35.30-1
Recognized classification society, definition ................................................ 30.10-57
Refrigerated systems ..................................................................................... 38.05-25
Registers regarding shipboard cargo gear ..................................................... 31.10-16
Regulations:

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46 CFR Ch. I (10–1–09 Edition)
Application of .............................................................................................. 30.01-5
Effective date ............................................................................................. 30.01-15
Explanation of vessel description ................................................................ 30.01-5
Governing alterations and repairs.............................................................. 30.01-10
Liquefied flammable gas............................................................................. Part 38
Scope of........................................................................................................ 36.01-1
Vapor control system ................................................................................. Part 39
Reid vapor pressure, definition...................................................................... 30.10-59
Reinspection .................................................................................................. 31.10-17
Relief valves:
Cargo pump .................................................................................................. 36.10-1
Cargo pump, testing of ............................................................................... 35.35-70
Cargo tanks ................................................................................................ 38.10-15
Repairs:
Application of regulations.......................................................................... 30.01-10
Firefighting equipment .............................................................................. 35.01-35
Inspection before making............................................................................. 35.01-1
Involving hot work....................................................................................... 35.01-1
Permit to proceed to another port ............................................................. 31.10-35
Reports of engineers........................................................................................ 35.25-5
Rivers, definition........................................................................................... 30.10-61
Rudder:
Indicators ................................................................................................... 35.40-35

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Safety radio certificate ................................................................................. 31.40-15
Safety requirements:
Means of escape............................................................................................ 32.02-1
Safety relief valves for cargo tanks............................................................... 38.10-15
Safety rules.......................................................................................... Subpart 35.30
Sailing directions............................................................................................ 35.20-1
Sanitary inspection by master and chief engineer.......................................... 35.01-5
Scantlings, material and workmanship............................................... 32.60-1, 32.65-5
Scuppers, closing of ....................................................................................... 35.35-10
Sea chests, examination of ............................................................................ 31.10-20
Sea strainers, examination of........................................................................ 31.10-20
Sea valves, closing of..................................................................................... 35.35-10
Segregation of spaces containing the emergency source of electric
power ....................................................................................................... 32.60-45
Shipboard cargo gear, certificates or registers ............................................. 31.10-16
Shipping papers required ............................................................................... 35.01-10
Sleeping accommodations ............................................................... Subpart 32.40-20
Smoking safety rules ...................................................................................... 35.30-5
Sounding machines........................................................................................ 32.15-10
Spark arrester ............................................................................................... 30.10-63
Spark producing devices................................................................................ 35.30-35
Spray nozzles ................................................................................................. 34.10-10
Specifications, material....................................................................... Subpart 31.30
Special operating requirements ........................................................... Subpart 35.01
Special operating requirements for tank barges carrying certain dangerous bulk cargoes ................................................................................. 35.01-50
Stability requirements .................................................................................. 31.10-30
Station bills required ...................................................................................... 35.10-1
Steam fire extinguishing systems, marking of.............................................. 35.40-10
Steam, carrying of excess .............................................................................. 35.25-15
Steam smothering system ................................................................... Subpart 34.13
Steel hull tank vessels ............................................ Subparts 32.70, 32.60, 32.63, 32.65

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Subchapter D Index
Steering apparatus on tank vessel ................................................................ 32.35-10
Steering gear, instruction for changing ........................................................ 35.40-30
Steering gear test .......................................................................................... 35.20-10
Steering orders, marking .............................................................................. 35.40-35
Stowage of package and general cargo .......................................................... 35.35-55
Subdivision of cargo spaces ............................................................... 32.60-5, 32.65-10

T
Tank barge:
Carrying bulk cargoes having dangerous characteristics in addition to
flammability and combustibility ......................................................... 35.01-50
Definition ................................................................................................... 30.10-65
Watchman for ............................................................................................. 35.05-15
Tankerman, definition .................................................................................. 30.10-71
Tankship:
Definition ................................................................................................... 30.10-67
Licensed officers and crew ........................................................................... 35.05-1
Tank vessel:
Definition ................................................................................................... 30.10-69
Laid up or dismantled .................................................................................. 31.01-1
Telegraph equipment, engine order ..................................................... Subpart 32.30
Telephone equipment, sound powered .................................................. Subpart 32.30
Testing of firefighting equipment ................................................................. 31.10-19
Tide tables ...................................................................................................... 35.20-1
Toilet facilities.............................................................................................. 32.40-25
Towing vessels.................................................................................. 31.15-10, 35.35-45
Trial trip inspection ...................................................................................... 31.10-40

U
Ullage holes, safety rules regarding .............................................................. 35.30-10

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Valves:
Back pressure check type................................................................. 38.10-1, 38.10-5
Excess flow ....................................................................................... 38.10-1, 38.10-5
Liquefied flammable gas .................................................................. 38.10-1, 38.10-5
Pressure vacuum relief ................................................................... 30.10-55, 32.20-5
Relief .................................................................... 35.35-70, 38.10-1, 38.10-10, 38.10-15
Shutoff ......................................................................................................... 38.10-1
Vapor balancing:
Design and equipment for ............................................................................ 39.40-3
General requirements for ............................................................................. 39.40-1
Operational requirements for....................................................................... 39.40-5
Vapor collection system ................................................................................. 39.20-1
Vapor control systems................................................................................... Part 39
Applicability ................................................................................................ 39.10-1
Cargo gauging system .................................................................................. 39.20-3
Definitions ................................................................................................... 39.10-3
Design and equipment ....................................................................... Subpart 39.20
General requirements ....................................................................... Subpart 39.10
Lightering and topping-off operations with vapor balancing ........... Subpart 39.40
Operational requirements ............................................................................ 39.30-1
Operations......................................................................................... Subpart 39.30
Personnel training...................................................................................... 39.10-11
Submission of vapor control system designs .............................................. 39.10-13
Tank barge and ship vapor overpressure and vacuum protection............... 39.20-11

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46 CFR Ch. I (10–1–09 Edition)
Tank barge liquid overfill protection .......................................................... 39.20-9
Tankship high and low vapor pressure protection...................................... 39.20-13
Vessel vapor processing units ......................................................................... 39.10-9
Ventilation and venting:
Cargo tanks....................................................................................... Subpart 32.55
Cargo tanks, independent ................................................................. Subpart 38.20
Cofferdams.................................................................................................. 32.55-45
Flame screen ................................................................................................ 36.20-1
Hold spaces ................................................................................................. 32.55-15
Pumproom.................................................................................................... 36.20-5
Tank ships with a keel laying date on or after January 1, 1975 .................. 32.55-50
Vessels coming alongside .............................................................................. 35.35-42
Vessels converted to tank vessels.................................................................. 31.10-10
Vessel’s name on equipment .......................................................................... 35.40-40
Vessel’s name ................................................................................... 32.05-10, 32.05-15
Voice tubes...................................................................................................... 32.30-1

W

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Warning signals and signs ............................................................................... 35.30-1
Warning signs.................................................................................................. 35.30-1
Washing facilities .......................................................................................... 32.40-25
Watchman for tank barge .............................................................................. 35.05-15
Water spray extinguishing systems, details ........................................ Subpart 34.25
Application .................................................................................................. 34.25-1
Capacity and arrangement ........................................................................... 34.25-5
Controls ...................................................................................................... 34.25-10
Installations contracted for prior to January 1, 1964.................................. 34.25-90
Piping ......................................................................................................... 34.25-15
Spray nozzles .............................................................................................. 34.25-20
Water spray systems, marking of .................................................................. 35.40-18
Waters, travel permitted on................................................................. Subpart 31.20
Welding repairs ............................................................................................... 35.01-1
Whistles .......................................................................................................... 32.15-5
Whistle signals for drills ................................................................................. 35.10-5
Whistling, unnecessary.................................................................................. 35.20-35
Work vests:
Application of .............................................................................................. 35.03-1
Approved unicellular plastic foam ............................................................... 35.03-5
Shipboard inspection .................................................................................. 35.03-20
Shipboard stowage...................................................................................... 35.03-15
Use .............................................................................................................. 35.03-10
Workmanship, material, and scantlings ......................................................... 32.65-5

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