A large number of mandatory and voluntary standards cover the varying facets of natural gas vehicle components, conversion, and manufacture, and the fueling stations, repair facilities and garages that service them. Following is a list and short description of the “NGV” series of American National Standards, developed through the Natural Gas Vehicle Coalition with support from the Gas Research Institute, the Canadian Gas Association and CSA International.
These voluntary standards represent natural gas vehicle industry “good practice” for the safety and durability of essential elements in CNG vehicle fueling stations and vehicle fuel systems.
NGV1-1994 (includes addenda 1a-1997 and 1b-1998) – Compressed Natural Gas Vehicle (NGV) Fueling Connection Devices
Covers the examination, construction, performance, testing, safe operation and certification of
NGV fueling nozzles and receptacles.
NGV2-2000 – Basic Requirements for Compressed Natural Gas Vehicle (NGV) Fuel Containers
Covers the construction, performance, testing, inspection and safe operation of vehicle on-board
compressed natural gas storage containers (“cylinders”).
PRD1-1998 (including addendum 1a-1999) – Basic Requirements for Pressure Relief Devices for Natural Gas Vehicle (NGV) Fuel Containers
A standard for the safe operation, substantial and durable construction, performance and testing of pressure relief valves for on-board natural gas vehicle fuel containers.
NGV3.1-1995 – Fuel System Components for Natural Gas Powered Vehicles
Applies to the design, construction, testing and approval to assure safe performance of newly produced compressed natural gas fuel system components (e.g., valves, pressure regulators, sensors) intended for use on NG powered vehicles.
NGV4.1-1999 – NGV Dispensing Systems
A standard for the safe operation, substantial and durable construction, performance and testing of components (e.g., housings, filters, electrical equipment, overfill protection) for CNG vehicle fuel dispensing systems.
NGV4.2-1999 – Hoses for Natural Gas Vehicles and Dispensing Systems
Covers the safe operation, substantial and durable construction, performance and testing of components for hoses for CNG vehicles and dispensing systems.
NGV4.4-1999 – Breakaway Devices for Natural Gas Dispensing Hoses and Systems
A standard for the safe operation, substantial and durable construction, performance and testing of breakaway devices (components to shut off gas flow in the event a vehicle hits a dispenser or drives away with a fueling hose still attached) for vehicular CNG dispensers and dispensing hoses.
NGV4.6-1999 – Manually Operated Valves for Natural Gas Dispensing Systems
A standard for the safe operation, substantial and durable construction, performance and testing of manually operated valves for CNG vehicle dispensing systems.
NGV4.8-2002 – Natural Gas Fueling Station Reciprocating Compressor Guidelines
General requirements for compressor packages containing reciprocating compressors used in CNG fueling station service.
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