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On April 13, 2023, PHMSA approves DNV’s petition for Phast version 8.4 as an alternative model for calculating the flammable vapor dispersion exclusion zones under 49 C.F.R. § 193.2059(a). The Final Environmental Assessment discusses the analysis of the validation results. Other documentations...
The Onshore Gas Gathering FAQs for Type C and Type R Pipelines include general guidance on gas gathering and specific guidance on requirements applicable to Type C and Type R gathering lines.
PHMSA published a Safety Advisory Notice on the "Transportation of Electric Vehicles Containing Lithium Batteries Damaged by Extreme Weather Events" to serve as a reminder of PHMSA's current requirements under the Hazardous Materials Regulations for transport and shipment of electric vehicles...
PHMSA issues responses to FAQs addressing questions about the upcoming phaseouts for transporting ethanol in DOT-111 tank cars. These FAQs will respond to questions and requests for guidance from railroads and tank car shippers on the upcoming May 1 and July 1 ethanol phaseout deadlines.
In relation to its final rulemaking entitled "Pipeline Safety: Safety of Gas Transmission Pipelines: Repair Criteria, Integrity Management Improvements, Cathodic Protection, Management of Change, and Other Related Amendments," PHMSA is providing notice that in certain limited circumstances...
In relation to its final rulemaking entitled "Pipeline Safety: Safety of Gas Transmission Pipelines: Repair Criteria, Integrity Management Improvements, Cathodic Protection, Management of Change, and Other Related Amendments," PHMSA is providing notice that it will exercise regulatory...
This Safety Advisory alerts those engaged in the rail transportation of hazardous materials of their obligation to appropriately plan for emergencies and share information about available emergency response resources, as well as urges actions to ensure emergency responders are adequately...
This Safety Advisory alerts hazardous materials tank car owners and offerors of the potential harm to certain manway assemblies with aluminum protective housing covers when exposed to extreme heat. See Safety Advisory for more details.