On December 28, 2020 (85 FR 85380), the Pipeline and Hazardous Materials Safety Administration (PHMSA) published a final rule in the federal register amending the Hazardous Materials Regulations (HMR) to revise certain requirementsapplicable to the manufacture, use, and requalification of DOT-specification cylinders. PHMSA is taking this action in response to petitions for rulemaking submitted by stakeholders and agency review of compressed gas cylinder regulations. Specifically, PHMSA is incorporating by reference or updating the references to several Compressed Gas Association publications, amending the filling requirements for compressed and liquefied gases, expanding the use of salvage cylinders, and revising and clarifying the manufacture and requalification requirements for cylinders. The effective date of this final rule is January 27, 2021. Unless otherwise specified, compliance with the amendments adopted in this final rule is required beginning December 28, 2021.

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PHMSA 12-28-2020 final rule DOT cylinders HMR revisions