Fuel System Integrity of Compressed Natural Gas Vehicles*

This Standard applies to MPVs, trucks and buses with a GVWR of 10,000 lbs. (4,536 kg) or less and use compressed natural gas (CNG) as a motor fuel. It also applies to school buses regardless of weight that use CNG as a motor fuel. It specifies requirements for the integrity of motor vehicle fuel systems using CNG, including the CNG fuel systems of bi-fuel, dedicated and dual fuel CNG vehicles.

*This Standard specifies barrier testing


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

Read the Complete Standard