Historical
NFPA 52-2019
NFPA 52 Vehicular Natural Gas Fuel Systems Code, 2019 edition
The purpose of this code shall be to provide fundamental safeguards against fire and explosion hazards associated with compressed natural gas (CNG) and liquefied natural gas (LNG) engine fuel systems on vehicles of all types and for refueling stations and associated storage.
National Fire Protection Association [nfpa]