The National Transportation Safety Board has reviewed PHMSA’s new rule for automatic shutoff valve installation and minimum rupture detection standards for newly constructed and entirely replaced onshore gas transmission.
This new rule improves pipeline safety and includes requirements for automatic shutoff valves for gas gathering, and hazardous liquid pipelines, a safety improvement beyond our original recommendations. However, it does not fully address previously issued safety recommendations.
PHMSA’s rule excludes existing pipelines and therefore would not have helped mitigate the natural gas explosion that occurred in San Bruno, California, in 2010. It also falls short in addressing safety issues related to valve spacing and leak detection.
“PHMSA’s final rule does not meet the criteria specified in NTSB safety recommendations regarding valve and rupture detection completely,” said NTSB Chair Jennifer Homendy. “I encourage PHMSA to continue their efforts to address the identified issues from our investigation of the San Bruno, California natural gas explosion and satisfy the NTSB safety recommendations.”
In a letter sent to the Department of Transportation on 25 May 2020, the NTSB cited several areas where the Notice of Proposed Rule Making that was the basis for the new final rule did not adequately address the relevant NTSB recommendations. The recommendations stem from the 9 September 2010, rupture of a Pacific Gas and Electric Company natural gas pipeline and resulting fire in San Bruno, California and areassociated with the current NTSB Most Wanted List of Transportation Safety Improvements.
The NTSB’s MWL identifies the top safety improvements that should be made across all transportation modes to prevent accidents, minimise injuries, and save lives in the future.
Read the latest issue of World Pipelines magazine for pipeline news, project stories, industry insight and technical articles.
The April issue includes a keynote article on regulations and compliance, along with technical articles on horizontal directional drilling, integrity systems and pipeline mapping.
Read the article online at: https://www.worldpipelines.com/regulations-and-standards/04042022/ntsb-responds-to-phmsas-valve-and-rupture-detection-rule/