IS 15722 : 2006 Road Vehicles - Compressed Natural Gas (CNG) Fuel System Components - CNG Low-Pressure Flexible Fuel Line With End Connections [CNG Fuel Line Having Pressure Not Exceeding 2.15 MPa (21.5 Bar)]

1 Scope

1.1 This standard specifies definitions, test methodsand requirements of CNG low-pressure flexible fuelline with end comections of CNG onboard fuel systemcomponent having service pressure not exceeding2.15 MPa (21.5 Bar), intended for use on motorvehicles defined in IS 14272 (Part 1), two wheelersand construction equipment vehicles (CEV).

1.1.1 This standard is applicable to CNG fuel systemcomponents intended to use on vehicles usingcompressed natural gas (mono-fuel or hi-fuelapplications).

1.1.2 It is not applicable to the following:

a) Liquefied natural gas (LNG) fuel systemcomponents located upstream of, andincluding, the vaporizer;

b) Fuel containers;

c) Stationary gas engines; and

d) CNG fuel systems components for thepropulsion of marine craft.

1.1.3 This standard is based upon a service pressurefor compressed natural gas as a fuel at 20 MPa(200 Bar) settled at 15�C. Other service pressures couldbe accommodated by adjusting the pressure by theappropriate factor (ratio). For example, a 25 MPa(250 Bar) service pressure system will require pressuresto be multiplied by 1.25. All references to pressure areto be considered gauge pressures unless otherwisespecified.

2 References

The following standards contain provisions, which,through reference in this text, constitute provisions ofthis standard. At the time of publication the editionsindicated were valid. All standards are subject torevision and parties to agreements based on thisstandard are encouraged to investigate the possibilityof applying the most recent editions of the standardsindicated below: