Pipeline Safety Alert
(by James Curry and Boyd Stephenson)
On July 24, 2020, the Pipeline and Hazardous Materials Safety Administration (PHMSA or the Agency) published a Final Rule (Rule) in the Federal Register allowing railroads to transport liquefied natural gas (LNG) in modified DOT-113C120W (DOT-113) railcars designed to hold cryogenic flammable liquids. The rule was prompted by a 2017 Association of American Railroads (AAR) rulemaking petition to allow LNG transport by rail and Executive Order 13868, directing PHMSA to conduct a rulemaking allowing LNG to travel by rail tank car. In developing the Rule, PHMSA relied on safety data from other cryogenic flammable liquid shipments and from an existing special permit that already allows limited transportation of LNG by rail to demonstrate LNG could safely be transported. The Rule follows PHMSA’s October 24, 2019, Notice of Proposed Rulemaking (NPRM). It takes effect on August 24, 2020, and PHMSA is allowing immediate voluntary compliance.
The rulemaking attracted significant attention from industry eager to meet increased natural gas demand, safety organizations such as the National Transportation Safety Board that raised concerns about transporting LNG, and from environmental groups. Numerous media reports on the Executive Order also increased public attention. Over 450 individuals and organizations submitted comments on the NPRM. In the NPRM and in the Rule, PHMSA noted that it lacks data about how many LNG rail shipments are likely to occur under the new rules. Currently, cryogenic flammable gases are transported rarely by railcar, but most commenters expect LNG rail shipments to quickly outstrip shipments of other cryogenic flammable gases.
Previously, LNG could only be transported by rail tank car with a special permit, or in smaller, portable tanks loaded onto a railcar. …


