Pipeline Safety Alert
(by Keith Coyle and Chris Kuhman)
On April 8, 2022, the Pipeline and Hazardous Materials Safety Administration (PHMSA) published a final rule in the Federal Register introducing new valve installation and rupture detection requirements for certain onshore gas, hazardous liquid, and carbon dioxide pipelines (the Final Rule). PHMSA issued the Final Rule in response to National Transportation Safety Board recommendations and congressional mandates from the Pipeline Safety, Regulatory Certainty, and Job Creation Act of 2011 (2011 PIPES Act), as well as related studies prepared by the Government Accountability Office and Oak Ridge National Laboratories. Below is a summary of the key changes that the Final Rule makes to PHMSA’s regulations.
Rupture Mitigation Valves
The Final Rule prescribes new rupture mitigation valve (RMV) installation requirements for certain onshore gas and hazardous liquid transmission and gathering pipelines. An RMV is defined as an automatic shut-off valve (ASV) or remote-control valve (RCV) “that a pipeline operator uses to minimize the volume of gas released from the pipeline and to mitigate the consequences of a rupture.”
Operators are required to install RMVs on certain pipeline segments with diameters of six inches or greater that are constructed or “entirely replaced” after April 10, 2023. “Entirely replaced” is defined for these purposes as replacing two or more miles, in the aggregate, of any contiguous five miles of pipeline during a 24-month period. However, the RMV installation requirements only apply to entirely replaced pipelines if the addition, replacement, or removal of a valve is part of the replacement project. The RMV installation requirements also do not apply to any gas pipeline segments in Class 1 or Class 2 locations that have a potential impact radius (PIR) of 150 feet or less. …