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Safety Advisory Notice: Special Permits for Composite Gas Cylinders

The Safety Advisory Notice provides recommendations to help facilitate the safe transportation of compressed natural gas under the terms of specific Hazardous Materials Special Permits authorizing the manufacture, mark, sale, and use of non-DOT specification fully wrapped reinforced composite cylinders. See the Safety Advisory Notice for more details.

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 PHMSA-Accessibility@dot.gov.
Effective Date: Tuesday, January 12, 2021
Issued Date: Tuesday, January 12, 2021