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

Summary: This SNPRM proposes to incorporate and allow 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 cargo tank motor vehicles (CTMVs), cryogenic portable tanks, and multi-unit tank car tanks (``ton tanks''). The PHMSA also proposes to incorporate and authorize the use of the 2015 edition of the National Board of Boiler and Pressure Vessel Inspectors National Board Inspection Code, in our regulations as it applies to the continued service of CTMVs, cryogenic portable tanks, and ton tanks constructed to ASME Section XII standards, as well as for existing CTMVs constructed in accordance with the current hazardous materials regulations. If adopted, these amendments will allow for flexibility regarding selection of authorized packaging, in addition to qualification and maintenance for continued service of the packaging, without compromising safety.