Subpart I—Platforms and Structures Source: 70 FR 41575, July 19, 2005, unless otherwise noted. General Requirements for Platforms § 250.900 What general requirements apply to all platforms? (a) You must design, fabricate, install, use, maintain, inspect, and assess all platforms and related structures on the Outer Continental Shelf (OCS) so as to ensure their structural integrity for the safe conduct of drilling, workover, and production operations. In doing this, you must consider the specific environmental conditions at the platform location. (b) You must also submit an application under §250.905 of this subpart and obtain the approval of the Regional Supervisor before performing any of the activities described in the following table:
(c) Under emergency conditions, you may make repairs to primary structural elements to restore an existing permitted condition without an application or prior approval. You must notify the Regional Supervisor of the damage that occurred within 24 hours, and you must notify the Regional Supervisor of the repairs that were made within 24 hours of completing the repairs. If you make emergency repairs on a floating platform, you must also notify the USCG. (d) You must determine if your new platform or major modification to an existing platform is subject to the Platform Verification Program (PVP). Section 250.910 of this subpart fully describes the facilities that are subject to the PVP. If you determine that your platform is subject to the PVP, you must follow the requirements of §§250.909–250.918 of this subpart. (e) MMS will cancel your approved platform installation permits one year after the approval is granted if the platform is not installed. If MMS cancels your permit approval, you must resubmit your application. [70 FR 41575, July 19, 2005; 71 FR 16859, Apr. 4, 2006, as amended at 73 FR 20171, Apr. 15, 2008] § 250.901 What industry standards must your platform meet? (a) In addition to the other requirements of this subpart, your plans for platform design, analysis, fabrication, installation, use, maintenance, inspection and assessment must, as appropriate, conform to: (1) American Concrete Institute (ACI) Standard 318, Building Code Requirements for Reinforced Concrete, plus Commentary, (incorporated by reference as specified in §250.198); (2) ACI 357R, Guide for the Design and Construction of Fixed Offshore Concrete Structures, (incorporated by reference as specified in §250.198); (3) ANSI/AISC 360–05, Specification for Structural Steel Buildings, (incorporated by reference as specified in §250.198); (4) American Petroleum Institute (API) Bulletin 2INT–DG, Interim Guidance for Design of Offshore Structures for Hurricane Conditions, (incorporated by reference as specified in §250.198); (5) API Bulletin 2INT–EX, Interim Guidance for Assessment of Existing Offshore Structures for Hurricane Conditions, (incorporated by reference as specified in §250.198); (6) API Bulletin 2INT–MET, Interim Guidance on Hurricane Conditions in the Gulf of Mexico, (incorporated by reference as specified in §250.198); (7) API Recommend Practice (RP) 2A–WSD, RP for Planning, Designing, and Constructing Fixed Offshore Platforms—Working Stress Design (incorporated by reference as specified in §250.198); (8) API RP 2FPS, Recommended Practice for Planning, Designing, and Constructing Floating Production Systems, (incorporated by reference as specified in §250.198); (9) API RP 2RD, Design of Risers for Floating Production Systems (FPSs) and Tension-Leg Platforms (TLPs), (incorporated by reference as specified in §250.198); (10) API RP 2SK, Recommended Practice for Design and Analysis of Station Keeping Systems for Floating Structures, (incorporated by reference as specified in §250.198); (11) API RP 2SM, Recommended Practice for Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, (incorporated by reference as specified in §250.198); (12) API RP 2T, Recommended Practice for Planning, Designing and Constructing Tension Leg Platforms, (incorporated by reference as specified in §250.198); (13) API RP 14J, Recommended Practice for Design and Hazards Analysis for Offshore Production Facilities, (incorporated by reference as specified in §250.198); (14) American Society for Testing and Materials (ASTM) Standard C 33–99a, Standard Specification for Concrete Aggregates, (incorporated by reference as specified in §250.198); (15) ASTM Standard C 94/C 94M–99, Standard Specification for Ready-Mixed Concrete, (incorporated by reference as specified in §250.198); (16) ASTM Standard C 150–99, Standard Specification for Portland Cement, (incorporated by reference as specified in §250.198); (17) ASTM Standard C 330–99, Standard Specification for Lightweight Aggregates for Structural Concrete, (incorporated by reference as specified in §250.198); (18) ASTM Standard C 595–98, Standard Specification for Blended Hydraulic Cements, (incorporated by reference as specified in §250.198); (19) AWS D1.1, Structural Welding Code—Steel, including Commentary, (incorporated by reference as specified in §250.198); (20) AWS D1.4, Structural Welding Code—Reinforcing Steel, (incorporated by reference as specified in §250.198); (21) AWS D3.6M, Specification for Underwater Welding, (incorporated by reference as specified in §250.198); (22) NACE Standard MR0175, Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment, (incorporated by reference as specified in §250.198); (23) NACE Standard RP0176–2003, Item No. 21018, Standard Recommended Practice, Corrosion Control of Steel Fixed Offshore Structures Associated with Petroleum Production. (b) You must follow the requirements contained in the documents listed under paragraph (a) of this section insofar as they do not conflict with other provisions of 30 CFR Part 250. You may use applicable provisions of these documents, as approved by the Regional Supervisor, for the design, fabrication, and installation of platforms such as spars, since standards specifically written for such structures do not exist. You may also use alternative codes, rules, or standards, as approved by the Regional Supervisor, under the conditions enumerated in §250.141. (c) For information on the standards mentioned in this section, and where they may be obtained, see §250.198 of this part. (d) The following chart summarizes the applicability of the industry standards listed in this section for fixed and floating platforms:
[70 FR 41575, July 19, 2005, as amended at 72 FR 12096, Mar. 15, 2007; 73 FR 20169, Apr. 15, 2008] § 250.902 What are the requirements for platform removal and location clearance? You must remove all structures according to §§250.1725 through 250.1730 of Subpart Q—Decommissioning Activities of this part. § 250.903 What records must I keep? (a) You must compile, retain, and make available to MMS representatives for the functional life of all platforms: (1) The as-built drawings; (2) The design assumptions and analyses; (3) A summary of the fabrication and installation nondestructive examination records; (4) The inspection results from the inspections required by §250.919 of this subpart; and (5) Records of repairs not covered in the inspection report submitted under §250.919(b). (b) You must record and retain the original material test results of all primary structural materials during all stages of construction. Primary material is material that, should it fail, would lead to a significant reduction in platform safety, structural reliability, or operating capabilities. Items such as steel brackets, deck stiffeners and secondary braces or beams would not generally be considered primary structural members (or materials). (c) You must provide MMS with the location of these records in the certification statement of your application for platform approval as required in §250.905(j). Platform Approval Program § 250.904 What is the Platform Approval Program? (a) The Platform Approval Program is the MMS basic approval process for platforms on the OCS. The requirements of the Platform Approval Program are described in §§250.904 through 250.908 of this subpart. Completing these requirements will satisfy MMS criteria for approval of fixed platforms of a proven design that will be placed in the shallow water areas (≤ 400 ft.) of the Gulf of Mexico OCS. (b) The requirements of the Platform Approval Program must be met by all platforms on the OCS. Additionally, if you want approval for a floating platform; a platform of unique design; or a platform being installed in deepwater (> 400 ft.) or a frontier area, you must also meet the requirements of the Platform Verification Program. The requirements of the Platform Verification Program are described in §§250.909 through 250.918 of this subpart. § 250.905 How do I get approval for the installation, modification, or repair of my platform? The Platform Approval Program requires that you submit the information, documents, and fee listed in the following table for your proposed project.
[70 FR 41575, July 19, 2005, as amended at 71 FR 40912, July 19, 2006] § 250.906 What must I do to obtain approval for the proposed site of my platform? (a) Shallow hazards surveys. You must perform a high-resolution or acoustic-profiling survey to obtain information on the conditions existing at and near the surface of the seafloor. You must collect information through this survey sufficient to determine the presence of the following features and their likely effects on your proposed platform: (1) Shallow faults; (2) Gas seeps or shallow gas; (3) Slump blocks or slump sediments; (4) Shallow water flows; (5) Hydrates; or (6) Ice scour of seafloor sediments. (b) Geologic surveys. You must perform a geological survey relevant to the design and siting of your platform. Your geological survey must assess: (1) Seismic activity at your proposed site; (2) Fault zones, the extent and geometry of faulting, and attenuation effects of geologic conditions near your site; and (3) For platforms located in producing areas, the possibility and effects of seafloor subsidence. (c) Subsurface surveys. Depending upon the design and location of your proposed platform and the results of the shallow hazard and geologic surveys, the Regional Supervisor may require you to perform a subsurface survey. This survey will include a testing program for investigating the stratigraphic and engineering properties of the soil that may affect the foundations or anchoring systems for your facility. The testing program must include adequate in situ testing, boring, and sampling to examine all important soil and rock strata to determine its strength classification, deformation properties, and dynamic characteristics. If required to perform a subsurface survey, you must prepare and submit to the Regional Supervisor a summary report to briefly describe the results of your soil testing program, the various field and laboratory test methods employed, and the applicability of these methods as they pertain to the quality of the samples, the type of soil, and the anticipated design application. You must explain how the engineering properties of each soil stratum affect the design of your platform. In your explanation you must describe the uncertainties inherent in your overall testing program, and the reliability and applicability of each test method. (d) Overall site investigation report. You must prepare and submit to the Regional Supervisor an overall site investigation report for your platform that integrates the findings of your shallow hazards surveys and geologic surveys, and, if required, your subsurface surveys. Your overall site investigation report must include analyses of the potential for: (1) Scouring of the seafloor; (2) Hydraulic instability; (3) The occurrence of sand waves; (4) Instability of slopes at the platform location; (5) Liquifaction, or possible reduction of soil strength due to increased pore pressures; (6) Degradation of subsea permafrost layers; (7) Cyclic loading; (8) Lateral loading; (9) Dynamic loading; (10) Settlements and displacements; (11) Plastic deformation and formation collapse mechanisms; and (12) Soil reactions on the platform foundations or anchoring systems. § 250.907 Where must I locate foundation boreholes? (a) For fixed or bottom-founded platforms and tension leg platforms, your maximum distance from any foundation pile to a soil boring must not exceed 500 feet. (b) For deepwater floating platforms which utilize catenary or taut-leg moorings, you must take borings at the most heavily loaded anchor location, at the anchor points approximately 120 and 240 degrees around the anchor pattern from that boring, and, as necessary, other points throughout the anchor pattern to establish the soil profile suitable for foundation design purposes. § 250.908 What are the minimum structural fatigue design requirements? (a) API RP 2A-WSD, Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms (incorporated by reference as specified in 30 CFR 250.198), requires that the design fatigue life of each joint and member be twice the intended service life of the structure. When designing your platform, the following table provides minimum fatigue life safety factors for critical structural members and joints.
(b) The documents incorporated by reference in §250.901 may require larger safety factors than indicated in paragraph (a) of this section for some key components. When the documents incorporated by reference require a larger safety factor than the chart in paragraph (a) of this section, the requirements of the incorporated document will prevail. Platform Verification Program § 250.909 What is the Platform Verification Program? The Platform Verification Program is the MMS approval process for ensuring that floating platforms; platforms of a new or unique design; platforms in seismic areas; or platforms located in deepwater or frontier areas meet stringent requirements for design and construction. The program is applied during construction of new platforms and major modifications of, or repairs to, existing platforms. These requirements are in addition to the requirements of the Platform Approval Program described in §§250.904 through 250.908 of this subpart. § 250.910 Which of my facilities are subject to the Platform Verification Program? (a) All new fixed or bottom-founded platforms that meet any of the following five conditions are subject to the Platform Verification Program: (1) Platforms installed in water depths exceeding 400 feet (122 meters); (2) Platforms having natural periods in excess of 3 seconds; (3) Platforms installed in areas of unstable bottom conditions; (4) Platforms having configurations and designs which have not previously been used or proven for use in the area; or (5) Platforms installed in seismically active areas. (b) All new floating platforms are subject to the Platform Verification Program to the extent indicated in the following table:
(c) If a platform is originally subject to the Platform Verification Program, then the conversion of that platform at that same site for a new purpose, or making a major modification of, or major repair to, that platform, is also subject to the Platform Verification Program. A major modification includes any modification that increases loading on a platform by 10 percent or more. A major repair is a corrective operation involving structural members affecting the structural integrity of a portion or all of the platform. Before you make a major modification or repair to a floating platform, you must obtain approval from both the MMS and the USCG. (d) The applicability of Platform Verification Program requirements to other types of facilities will be determined by MMS on a case-by-case basis. [70 FR 41575, July 19, 2005; 71 FR 28080, May 15, 2006] § 250.911 If my platform is subject to the Platform Verification Program, what must I do? If your platform, conversion, or major modification or repair meets the criteria in §250.910, you must: (a) Design, fabricate, install, use, maintain and inspect your platform, conversion, or major modification or repair to your platform according to the requirements of this subpart, and the applicable documents listed in §250.901(a) of this subpart; (b) Comply with all the requirements of the Platform Approval Program found in §§250.904 through 250.908 of this subpart. (c) Submit for the Regional Supervisor's approval three copies each of the design verification, fabrication verification, and installation verification plans required by §250.912; (d) Include your nomination of a Certified Verification Agent (CVA) as a part of each verification plan required by §250.912; (e) Follow the additional requirements in §§250.913 through 250.918; (f) Obtain approval for modifications to approved plans and for major deviations from approved installation procedures from the Regional Supervisor; and (g) Comply with applicable USCG regulations for floating OCS facilities. § 250.912 What plans must I submit under the Platform Verification Program? If your platform, associated structure, or major modification meets the criteria in §250.910, you must submit the following plans to the Regional Supervisor for approval: (a) Design verification plan. You may submit your design verification plan with or subsequent to the submittal of your Development and Production Plan (DPP) or Development Operations Coordination Document (DOCD). Your design verification must be conducted by, or be under the direct supervision of, a registered professional civil or structural engineer or equivalent, or a naval architect or marine engineer or equivalent, with previous experience in directing the design of similar facilities, systems, structures, or equipment. For floating platforms, you must ensure that the requirements of the USCG for structural integrity and stability, e.g., verification of center of gravity, etc., have been met. Your design verification plan must include the following: (1) All design documentation specified in §250.905 of this subpart; (2) Abstracts of the computer programs used in the design process; and (3) A summary of the major design considerations and the approach to be used to verify the validity of these design considerations. (b) Fabrication verification plan. The Regional Supervisor must approve your fabrication verification plan before you may initiate any related operations. Your fabrication verification plan must include the following: (1) Fabrication drawings and material specifications for artificial island structures and major members of concrete-gravity and steel-gravity structures; (2) For jacket and floating structures, all the primary load-bearing members included in the space-frame analysis; and (3) A summary description of the following: (i) Structural tolerances; (ii) Welding procedures; (iii) Material (concrete, gravel, or silt) placement methods; (iv) Fabrication standards; (v) Material quality-control procedures; (vi) Methods and extent of nondestructive examinations for welds and materials; and (vii) Quality assurance procedures. (c) Installation verification plan. The Regional Supervisor must approve your installation verification plan before you may initiate any related operations. Your installation verification plan must include: (1) A summary description of the planned marine operations; (2) Contingencies considered; (3) Alternative courses of action; and (4) An identification of the areas to be inspected. You must specify the acceptance and rejection criteria to be used for any inspections conducted during installation, and for the post-installation verification inspection. (d) You must combine fabrication verification and installation verification plans for manmade islands or platforms fabricated and installed in place. § 250.913 When must I resubmit Platform Verification Program plans? (a) You must resubmit any design verification, fabrication verification, or installation verification plan to the Regional Supervisor for approval if: (1) The CVA changes; (2) The CVA's or assigned personnel's qualifications change; or (3) The level of work to be performed changes. (b) If only part of a verification plan is affected by one of the changes described in paragraph (a) of this section, you can resubmit only the affected part. You do not have to resubmit the summary of technical details unless you make changes in the technical details. § 250.914 How do I nominate a CVA? (a) As part of your design verification, fabrication verification, or installation verification plan, you must nominate a CVA for the Regional Supervisor's approval. You must specify whether the nomination is for the design, fabrication, or installation phase of verification, or for any combination of these phases. (b) For each CVA, you must submit a list of documents to be forwarded to the CVA, and a qualification statement that includes the following: (1) Previous experience in third-party verification or experience in the design, fabrication, installation, or major modification of offshore oil and gas platforms. This should include fixed platforms, floating platforms, manmade islands, other similar marine structures, and related systems and equipment; (2) Technical capabilities of the individual or the primary staff for the specific project; (3) Size and type of organization or corporation; (4) In-house availability of, or access to, appropriate technology. This should include computer programs, hardware, and testing materials and equipment; (5) Ability to perform the CVA functions for the specific project considering current commitments; (6) Previous experience with MMS requirements and procedures; (7) The level of work to be performed by the CVA. § 250.915 What are the CVA's primary responsibilities? (a) The CVA must conduct specified reviews according to §§250.916, 250.917, and 250.918 of this subpart. (b) Individuals or organizations acting as CVAs must not function in any capacity that would create a conflict of interest, or the appearance of a conflict of interest. (c) The CVA must consider the applicable provisions of the documents listed in §250.901(a); the alternative codes, rules, and standards approved under 250.901(b); and the requirements of this subpart. (d) The CVA is the primary contact with the Regional Supervisor and is directly responsible for providing immediate reports of all incidents that affect the design, fabrication and installation of the platform. § 250.916 What are the CVA's primary duties during the design phase? (a) The CVA must use good engineering judgement and practices in conducting an independent assessment of the design of the platform, major modification, or repair. The CVA must ensure that the platform, major modification, or repair is designed to withstand the environmental and functional load conditions appropriate for the intended service life at the proposed location. (b) Primary duties of the CVA during the design phase include the following:
(c) The CVA must submit interim reports to the Regional Supervisor and to you, as appropriate. The CVA, upon completion of the design verification, must prepare a final report and submit one copy to the Regional Supervisor. The CVA must submit the final report within 90 days of the receipt of the design data, or within 90 days from the date the approval to act as a CVA was issued, whichever is later. The CVA must submit the final report to the Regional Supervisor before fabrication begins, and must include: (1) A summary of the material reviewed and the CVA's findings; (2) The CVA's recommendation that the Regional Supervisor either accept, request modifications, or reject the proposed design; (3) The particulars of how, by whom, and when the independent review was conducted; and (4) Any additional comments the CVA may deem necessary. § 250.917 What are the CVA's primary duties during the fabrication phase? (a) The CVA must use good engineering judgement and practices in conducting an independent assessment of the fabrication activities. The CVA must monitor the fabrication of the platform or major modification to ensure that it has been built according to the approved design and the fabrication plan. If the CVA finds that fabrication procedures are changed or design specifications are modified, the CVA must inform you. If you accept the modifications, then the CVA must so inform the Regional Supervisor. (b) Primary duties of the CVA during the fabrication phase include the following:
(c) Reports. The CVA must submit interim reports to the Regional Supervisor and to you, as appropriate. The CVA must prepare a final report covering the adequacy of the entire fabrication phase. The final report need not cover aspects of the fabrication already included in interim reports. The CVA must submit one copy of the final report to the Regional Supervisor within 90 days after completion of the fabrication phase but before the beginning of the installation phase. In the final report the CVA must: (1) Give details of how, by whom, and when the independent monitoring activities were conducted; (2) Describe the CVA's activities during the verification process; (3) Summarize the CVA's findings; (4) Confirm or deny compliance with the design specifications and the approved fabrication plan; (5) Make a recommendation to accept or reject the fabrication; and (6) Provide any additional comments that the CVA deems necessary. § 250.918 What are the CVA's primary duties during the installation phase? (a) The CVA must use good engineering judgment and practice in conducting an independent assessment of the installation activities. (b) Primary duties of the CVA during the installation phase include the following:
(c) Reports. The CVA must submit interim reports to you and the Regional Supervisor, as appropriate. The CVA must prepare a final report covering the adequacy of the entire installation phase, and submit one copy of the final report to the Regional Supervisor within 30 days of the installation of the platform. In the final report, the CVA must: (1) Give details of how, by whom, and when the independent monitoring activities were conducted; (2) Describe the CVA's activities during the verification process; (3) Summarize the CVA's findings; (4) Write a confirmation or denial of compliance with the approved installation plan; (5) Provide a recommendation to accept or reject the installation; and (6) Provide any additional comments that the CVA deems necessary. Inspection, Maintenance, and Assessment of Platforms § 250.919 What in-service inspection requirements must I meet? (a) You must develop a comprehensive annual in-service inspection plan covering all of your platforms. As a minimum, your plan must address the recommendations of the appropriate documents listed in §250.901(a). Your plan must specify the type, extent, and frequency of in-place inspections which you will conduct for both the above water and the below water structure of all platforms, and pertinent components of the mooring systems for floating platforms. The plan must also address how you are monitoring the corrosion protection for both the above water and below water structure. (b) You must submit a report annually on November 1 to the Regional Supervisor that must include: (1) A list of fixed or floating platforms inspected in the preceding 12 months; (2) The extent and area of inspection; (3) The type of inspection employed, ( i.e. , visual, magnetic particle, ultrasonic testing); and (4) A summary of the testing results indicating what repairs, if any, were needed and the overall structural condition of the fixed or floating platform. § 250.920 What are the MMS requirements for assessment of platforms? (a) You must perform a platform assessment when needed, based on the platform assessment initiators listed in sections 17.2.1–17.2.5 of API RP 2A–WSD, Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms—Working Stress Design (incorporated by reference as specified in 30 CFR 250.198). (b) You must initiate mitigation actions for platforms that do not pass the assessment process of API RP 2A–WSD. (c) You must document all wells, equipment, and pipelines supported by the platform if you intend to use the medium or low consequence of failure exposure category for your assessment. Exposure categories are defined in API RP 2A–WSD Section 1.7. (d) MMS may require you to conduct a platform assessment where reduced environmental loading criteria are not allowed. (e) The use of Section 17, Assessment of Existing Platforms, of API RP 2A–WSD, is limited to existing fixed structures that are serving their original approved purpose. § 250.921 How do I analyze my platform for cumulative fatigue? (a) If you are required to analyze cumulative fatigue on your platform because of the results of an inspection or platform assessment, you must ensure that the safety factors for critical elements listed in §250.908 are met or exceeded. (b) If the calculated life of a joint or member does not meet the criteria of §250.908, you must either mitigate the load, strengthen the joint or member, or develop an increased inspection process.
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| File Type | application/msword |
| Author | blundonc |
| Last Modified By | blundonc |
| File Modified | 2008-06-06 |
| File Created | 2008-06-06 |