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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

Hazardous Materials: Safety Requirements for External Product Piping on Cargo Tanks Transporting Flammable Liquids

Advance notice of proposed rulemaking (ANPRM).

RSPA is considering alternatives for reducing safety risks associated with the transportation of flammable liquids in unprotected product piping (wetlines) on DOT specification cargo tank motor vehicles. In this notice, RSPA is soliciting comments and information regarding methods to reduce the risks posed by wetlines. In addition, we are seeking answers to questions to assist in determining whether further regulatory action is warranted. Regulatory amendments that may be promulgated as a result of comments to this notice will be developed jointly with the Federal Motor Carrier Safety Administration (FMCSA), which has primary enforcement authority for cargo tank motor vehicles and highway transportation.

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