Have pipeline design requirements changed to accommodate alternative MAOP requirements?
Yes. The rule adds a new section to Subpart CPipe Design in 49 CFR Part 192. The new section, 49 CFR 192.112, prescribes additional design standards required for the steel pipeline to be qualified for operation at an alternative MAOP based on higher stress levels. These include requirements for rigorous steel chemistry and manufacturing practices and standards. Pipelines designed under these standards contain pipe with improved toughness properties to resist damage from outside forces and to control fracture initiation and growth. The considerable attention paid to the quality of seams, coatings, and fittings is intended to prevent flaws leading to pipeline failure. Unlike other design standards, 49 CFR 192.112 applies to a new or existing pipeline only to the extent that an operator elects to operate at a higher alternative MAOP than allowed in previous regulations.
Related Questions
- Does a pipeline operator need to notify PHMSA that they will operate their pipeline under alternative MAOP requirements?
- How were the gas transmission pipeline regulations revised to reflect the alternative MAOP requirements?
- Have pipeline design requirements changed to accommodate alternative MAOP requirements?
