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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

UN Cylinders: What You Should Know

This brochure describes the USDOT standards for the design, construction, and use of UN pressure receptacles, adopted into 49 CFR, Parts 171-180, effective September 11, 2006.

DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact
Effective Date: Monday, September 11, 2006
Issued Date: Monday, September 11, 2006