This standard specifies the model designation, requirements, test method, inspection rules, marking, packaging, transportation and storage of pressure regulator of compressed natural gas (hereinafter referred to as CNG) vehicles.
This standard is applicable to the pressure regulator of CNG vehicles (hereinafter referred to as pressure regulator) with the rated working pressure not exceeding 20MPa (the pressure stated hereof refers to gauge pressure), the operating ambient temperature of -40℃~+120℃ and the working medium conforming to GB 18047.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrigendum), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition applies.
GB/T 528 Rubber, Vulcanized or Thermoplastic - Determination of Tensile Stress-strain Properties (GB/T 528-1998, eqv ISO 37:1994)
GB/T 3765 Specification for Bite Type Tube Fittings
GB/T 7762 Rubber, Vulcanized or Thermoplastic - Resistance to Ozone Cracking - Static Strain Test (GB/T 7762-2003, ISO 1431-1:1989, Rubber, Vulcanized or Thermoplastic - Resistance to Ozone Cracking - Part 1: Static and Dynamic Strain Testing, MOD)
GB 9969.1 General Principles for Preparation of Instructions for Use of Industrial Products
GB/T 10125 Corrosion Tests in Artificial Atmospheres - Salt Spray Test (GB/T 10125-1997, eqv ISO 9227:1990)
GB/T 17895 Natural Gas Vehicle and Liquefied Petroleum Gas Vehicle - Vocabulary
GB 18047 Compressed Natural Gas as Vehicle Fuel
GB/T 19240 Mounting Requirements of Special Equipment for Compressed Natural Vehicles
CB/T 3764 Thickness Series and Quality Requirements for Metallic and Chemical Coatings
QC/T 245 Technical Specifications for Isolated Plant of Compressed Natural Gas Vehicles
3 Terms and Definitions
GB/T 20735-2006 The following standards are cited：
