Hazardous Materials: Incorporation of ASME Code Section XII and the National Board Inspection Code

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 Parts 107, 171, 173, 178, 179, and 180 [Docket No. PHMSA-2010-0019 (HM-241)] RIN 2137-AE58 AGENCY: Pipeline and Hazardous Materials Safety Administration (PHMSA), Department of Transportation (DOT). ACTION: Final rule. SUMMARY: PHMSA is amending the Hazardous Materials Regulations (HMR) to incorporate by reference and authorize the use of the 2015 edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section XII—Rules for Construction and Continued Service of Transport Tanks for the construction and continued service of certain specification cargo tank motor vehicles (CTMVs), cryogenic portable tanks, and multi-unit tank car tanks. PHMSA is also amending the HMR to incorporate by reference and authorize the use of the 2015 edition of the National Board of Boiler and Pressure Vessel Inspectors National Board Inspection Code, Parts 2 and 3 (including Supplement 6) as it applies to the continued service of transport packagings constructed to ASME Section XII standards, as well as for existing CTMVs constructed in accordance with ASME requirements and the HMR. PHMSA finds these updates will result in cost savings and increased regulatory flexibility without compromising safety. DATES: Effective date: October 28, 2026. Voluntary compliance date: September 28, 2026. Incorporation by reference date: The incorporation by reference of the publicati…