This part of ISO 15500 specifies tests and requirements for the gas injector, a compressed natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833. This part of ISO 15500 is applicable to vehicles using natural gas in accordance with ISO 15403 (mono-fuel, bi-fuel or dual-fuel applications). It is not applicable to injectors intended for high-pressure injection to the combustion chamber, or to the following: a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer; b) fuel containers; c) stationary gas engines; d) container mounting hardware; e) electronic fuel management; f) refuelling receptacles. NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested according to the appropriate functional tests. NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified. NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as fuel of [ ] settled at . Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a [ ] service pressure system will require pressures to be multiplied by 1,25. NOTE 4 ; . 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 15500. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 15500 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 3833:1977, Road vehicles — Types — Terms and definitions ISO 15500-1, Road vehicles — Compressed natural gas (CNG) fuel system components — Part 1: General requirements and definitions ISO 15500-2, Road vehicles — Compressed natural gas (CNG) fuel system components — Part 2: Performance and general test methods 20 MPa 200 bar 15 ◦C 25 MPa 250 bar 1 bar = 0,1 MPa = 105 Pa 1 MPa = 1 N/mm