IS 15714 : 2006 Road Vehicles - Compressed Natural Gas (CNG) Fuel System Components - Gas/Air Mixer

1 Scope

1.1 This standard specifies definitions, test methodsand requirements of gadair mixer of CNG onboard fuelsystem component intended for use on motor vehiclesdefined in IS 14272 (Part 1), two wheelers andconstruction equipment vehicles (CEV).

1.1.1 This standard is applicable to CNG fuel systemcomponents intended to use on vehicles usingcompressed natural gas in accordance with IS 15320(mono-fuel or hi-fuel applications).

1.1.2 It is not applicable to the following

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

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 could beaccommodated 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 to revisionand parties to agreements based on thk standard areencouraged to investigate the possibility of applying themost recent edhions of the standards indicated below: