2311.8 Repair garages for vehicles fueled by lighter-than-air motor fuels.
FC § 2311.8
The repair garage, or the room, booth or area thereof, for the conversion and/or repair of vehicles which use CNG, liquefied natural gas (LNG), hydrogen or other lighter-than-air motor fuels shall be designed, installed, operated and maintained in accordance with FC 2311.8.1 through 2311.8.8. Exceptions: 1. Repair garages where work is conducted only on vehicles that have been defueled and their systems purged with nitrogen gas, and which will not be re-fueled in the repair garage. Documentation of such purging shall be maintained on the premises and signage conspicuously posted that no lighter-than-air gas fueling shall be conducted in the repair garage.
2.Repair garages where work is not performed on the fuel system and is limited to exchange of parts and maintenance requiring no open flame or welding on the CNG-, LNG-, hydrogen- or other lighter-than-air-fueled motor vehicle.
3.Repair garages for hydrogen-fueled vehicles where work is not performed on the hydrogen storage tank and is limited to the exchange of parts and maintenance requiring no open flame or welding on the hydrogen-fueled vehicle. During the work, the entire hydrogen fuel system shall contain less than 200 cubic feet (5.6 m3) of hydrogen.
4.Repair garages for natural-gas-fueled vehicles where work is not being performed on the fuel storage tank, and is limited to the exchange of parts and maintenance requiring no open flame or welding on the natural-gas-fueled vehicle. During the work, the natural gas in the vehicle fuel tank shall contain a pressure of not more than 250 psi at 70ºF (1724 kPa at 21ºC).
