FMVSS 304

Compressed Natural Gas Fuel Container Integrity

This Standard applies to containers designed to store CNG as motor fuel on-board any motor vehicle. It specifies requirements for the integrity of CNG motor vehicle fuel containers.

Applicability:

Trucks & MPVs 10,000 GVWR or Less Yes
Trucks More than 10,000 GVWR Yes
Buses 10,000 GVWR or Less Yes
Buses More than 10,000 GVWR Yes
Trailers No 

Read the Complete Standard