ANSI/IAS NGV 4.1-99/CSA 12.5-M99 (R2014)
NGV Dispensing Systems
This Standard applies to:
(a) The mechanical and electrical features of newly manufactured systems that dispense natural gas for vehicles (NGV) where such a system is intended primarily to dispense the fuel directly into the fuel storage container of the vehicle,
(b) NGV dispensers contained in a single housing, and
(c) NGV dispensers contained in multiple housings for metering and registering devices, remote electronics, remote overfill protection, hoses and nozzles.
Each dispenser may have the capability of independently fueling more than one vehicle simultaneously.
NGV dispensers covered by this standard are intended for use with gas composition specified by SAE J1616, Recommended Practice for Compressed Natural Gas Vehicle Fuel.
A dispenser hose may be pressurized or non-pressurized while inactive.
This Standard does not apply to:
(a) Compression and ancillary equipment;
(b) Compressed natural gas storage containers;
(c) Priority valving equipment;
(d) Vehicle Fueling Appliances for NGV;
(e) Remote station or Kiosk consoles; and
(f) Remote sequencing equipment and other remote equipment not supplied as part of the dispenser.
Installation of a dispensing system is intended to be in accordance with the Standards ANSI/NFPA 52, Compressed Natural Gas (CNG) Vehicular Fuel Systems, or the CSA-B108-99 Natural Gas Fuelling Stations Installation Code, as applicable, and the requirements of the authority having jurisdiction.
All dimensions used in this standard are in metric units [International System of Units (SI)], unless otherwise specified. If a value for measurement, as given in this standard, is followed by an equivalent value in other units, the first stated is to be regarded as the specification.
All references to pressure throughout this document are to be considered gauge pressures unless otherwise specified.
Exhibit B contains a list of standards specifically referenced in this standard, and sources from which these reference standards may be obtained. It includes both U.S. and Canadian reference standards where applicable.