IS 15718 : 2006 Road Vehicles - Compressed Natural Gas (CNG) Fuel System Components - CNG High Pressure Fuel Line (Flexible Hose) with End Connections [Having Service Pressure Exceeding 2.15 MPa (21.5 Bar)]

1 Scope

1.1 This standard specifies definitions, test methods and requirements of CNG high pressure fuel line (flexible hose) with end connections having service pressure exceeding 2.15 MPa (21.5 bar), of CNG onboard fuel system component intended for use on motor vehicles defined in IS 14272 (Part 1), two wheelers and construction equipment vehicles (CEV).

1.1.1 This standard is applicable to CNG fuel system componentsintendedto use on vehiclesusing compressed natural gas (mono-fuel or bi-fuel applications).

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 pressure for 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 are tobe considered gauge pressures unless otherwise specified.

2 References

The following standards contain provisions, which, through reference in this text, constitute provisions of this standard. At the time of publication the editions indicatedwere valid. All standards are subject to revision and parties to agreements based on this standard areencouraged to investigate the possibility of applying the most recent editions of the standards indicated below: