Understanding PHMSA’s Proposed Expansion of MAOP Verification

January 2017, Vol. 244, No. 1

By Daniel Thayer, Jacob Greenfield and Courtney Tripp

U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration (PHMSA) issued a notice of proposed rulemaking (NPRM) on April 8, published in Federal Register Vol. 81, No. 68, which outlines significant changes to the Pipeline Safety Regulations to increase the safety of onshore natural gas transmission and gathering pipelines across the country. One of the most significant areas of these changes, which would bring with it far-reaching effects for owners and operators, focuses on maximum allowable operating pressure (MAOP) and pipeline material verification. Tulsa, OK-based Shafer, Kline & Warren’s (SKW) Daniel Thayer, who heads…

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