Transportation Department, Pipeline and Hazardous Materials Safety Administration
This final rule removes undue regulatory burdens by adopting the provisions of U.S. Department of Transportation (DOT) special permit (SP) 14175 to authorize a 10-year requalification period and the ultrasonic examination (UE) testing method for DOT specification 3A and 3AA cylinders in flammable and non-flammable, nonpoisonous gas service. This adoption reflects advances in testing technology and will relieve stakeholders of the burden of performing more frequent cylinder requalification.
Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Department of Transportation Pipeline and Hazardous Materials Safety Administration 49 CFR Part 180 [Docket No. PHMSA-2025-0103 (HM-268O)] RIN 2137-AG17 AGENCY: Pipeline and Hazardous Materials Safety Administration (PHMSA), Department of Transportation (DOT). ACTION: Final rule. SUMMARY: This final rule removes undue regulatory burdens by adopting the provisions of U.S. Department of Transportation (DOT) special permit (SP) 14175 to authorize a 10-year requalification period and the ultrasonic examination (UE) testing method for DOT specification 3A and 3AA cylinders in flammable and non-flammable, nonpoisonous gas service. This adoption reflects advances in testing technology and will relieve stakeholders of the burden of performing more frequent cylinder requalification. DATES: This final rule is effective September 3, 2026. FOR FURTHER INFORMATION CONTACT: Ryan Larson, Standards and Rulemaking Division, Pipeline and Hazardous Materials Safety Administration (PHMSA), 1200 New Jersey Avenue SE, Washington, DC 20590, 202-366-8553, ryan.larson@dot.gov . I. PHMSA Action A. What action is PHMSA taking in this final rule? PHMSA is adopting the provisions of DOT SP 14175 into the Hazardous Materials Regulations (HMR; 49 CFR parts 171-180 ) by adding new paragraph (b)(2) to 49 CFR 180.209 . This change will authorize a 10-year requalification interval (rather than five years) when either UE testing or hydrostatic testing with visual inspection is used for DOT specification 3A and …
Other Federal Register documents from the same docket.
Citation: 91 FR 49354
