ANSI/IAS NGV 4.2-1999/CSA 12.52-M99 (R2009)
Hoses for Natural Gas Vehicles and Dispensing Systems
This Standard applies to compressed natural gas hose assemblies which are used for NGV dispensing stations to connect the dispenser to the refueling nozzle, or used as part of a vehicle on-board fuel system and for gas lines which carry vented gas back to a safe location.
Hose assemblies certified under this standard may be assembled at the point of manufacture of the bulk hose, or at hose assembly facilities authorized by the bulk hose manufacturer.
This Standard does not apply to hoses which are utilized at less than 2 psi.
All dimensions used in this standard are in metric units [International System of Units (SI)], unless otherwise specified. If a value for a 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.
For clarification of which clause applies to which aspect of fueling see Appendix A (Applications Summary Table).
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.