Title 49 of the Code of Federal Regulations of the United States (49 CFR) provides requirements for natural gas and liquid pipeline operators to maintain human and environmental safety. The regulations stipulate the maximum pressure at which a pipeline can be operated in accordance with 49 CFR Part 192 Paragraph 192.619 for natural gas and 49 CFR Part 19 Paragraph 195.310 for liquids.
In May of 2012, PHMSA issued an advisory bulletin reminding gas pipeline facilities to preserve and verify records related to maximum allowable operating pressure (MAOP) and informed hazardous liquid operators that they should adhere to the same standards for maximum operating pressure (MOP). However, as the American Gas Association has noted, maintenance of these records may be complicated by mergers and acquisitions or changes in how the records were stored over the years, leading to incomplete records by current standards. For this reason, it is important for operators to conduct record searches and re-evaluate existing records for completeness.
In addition, PHMSA issued a Notice of Proposed Rulemaking (NPRM) to 49 CFR Part 192 in March of 2016 that contains additional requirements for MAOP verification.
Applus+ solutions for MAOP and MOP record verification
Applus+ has developed a Materials Verification Program (MVP) to assist pipeline owners and operators in determining and documenting the mechanical properties of their assets in order to obtain the records required by regulations. Applus+ technicians use in-situ material testing techniques to gather data required to verify the mechanical properties of the line pipe for MAOP/MOP validation.
Field Material Testing Techniques offered by Applus+ includes:
- Field metallography and replication (ASTM grain size and seam weld identification)
- Optical Emission Spectrometry (chemical composition and the carbon equivalence value)
- UCI HV Hardness Testing (for material strength identification and aids in seam weld identification)
- Instrumented Indentation Technology (AIS is used to measure the YS and UTS directly)
The Applus+ MVP program results can also be used in fitness-for-service assessments as requested by the client.
For more information, contact us.