US PIPELINE REGULATIONS - Conclusion: PHMSA needs to clarify SMYS for pressure boosts

07/03/2006
The US Pipeline & Hazardous Materials Administration needs to clarify in each waiver application for an increase in pipeline maximum allowable operating pressure what maximum specified minimum yield strength (MAOP plus pressure accumulation) it would allow in areas where operators seek to increase MAOP.This article, the second of two, identifies key issues and concerns to be addressed before granting pressure increase waivers and summarizes observations obtained from PHMSA’s Mar. 21, 2006, MAOP public meeting. The first article (OGJ, June 26, 2006, p. 70) discussed the general context in which the MAOP debate is occurring.Although MAOP is defined in regulation, not all parties u...
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