Transportation Safety Alert
(by Boyd Stephenson and James Curry)
On October 24, 2019, the Pipeline and Hazardous Materials Safety Administration (PHMSA) published a notice of proposed rulemaking (NPRM) proposing to amend the Hazardous Materials Regulations (HMR) to allow the bulk transport of liquefied natural gas (LNG) in DOT-113C120W (DOT-113) specification railcars. PHMSA issued the NPRM in response to a petition for rulemaking filed by the Association of American Railroads (AAR). Also, an April 10, 2019, Executive Order directed PHMSA to issue a final rule on bulk transportation of LNG by rail by May 2020. Comments on the NPRM are due by December 23, 2019.
Over the last decade, the number of LNG facilities, and total storage and vaporization capacities have drastically increased. And, according to PHMSA, total liquefaction capacity increased by 939% due to new LNG export terminals. With this growth, PMHSA has recognized there may be a need for greater flexibility in the modes of transporting LNG. While LNG is already authorized for transportation by highway and in maritime vessels, LNG may only be transported by railcar with a special permit from PHMSA or in smaller, portable tanks loaded onto a railcar. However, other cryogenic liquids that are chemically similar to LNG are already authorized to be transported by rail under the HMR.
Currently, there is a pending special permit renewal application to transport bulk LNG in DOT-113 specification railcars using requirements identical to those proposed in the NPRM. The comment period ended on August 7, 2019, with PHMSA receiving nearly 3,000 comments. PHMSA has not yet acted on the special permit application.
Proposed Changes
In the NPRM, PHMSA proposes to:
- Amend the LNG entry on the Hazardous Materials Table (UN 1972, Methane, refrigerated liquid (cryogenic liquid), 2.1) to allow transportation of bulk LNG in rail tank cars under the terms of 49 C.F.R.