1 Scope
This standard specifies the technical requirements and test methods of compressed natural gas as vehicle fuel.
This standard is applicable to the compressed natural gas as vehicle fuel with the pressure no larger than 25MPa.
2 Normative References
The provisions of the following standard, through reference into this standard, constitute provisions of this standard. At the time of publication, all editions indicated are valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the standards indicated below.
GB/T 11060.1-1998 "Natural Gas-Determination of Hydrogen Sulfide Content- Iodometric Titration Method"
GB/T 11061-1997 "Natural Gas-Determination of Sulfur-Oxidative Microcoulometry Method"
GB/T 11062-1998 "Natural Gas-Calculation of Calorific Values, Density, Relative Density and Wobbe Index from Composition"
GB/T 13609-1999 "Natural Gas-Sampling Guidelines"
GB/T 3610-1992 "Analysis of Natural Gas by Gas Chromatography"
GB 17258-1998 "Steel Cylinders for the On-board of Compressed Natural Gas as a Fuel for Vehicles"
GB/T 17283-1998 "Determination of the Water Dew Point of Natural Gas-Cooled Surface Condensation Hygrometers"
“Safety Inspection Regulations for Gas Cylinders”
“Supervision Regulation on Safety Technology for Pressure Vessel”
3 Definitions
For the purposes of this standard, the following definitions apply.
3.1 Compressed natural gas (CNG)
It is the compressed gas fuel of which the main component is methane.
3.2 Compressed natural gas as vehicle fuel
It is the compressed natural gas that is stored in special pressure vessels and used as vehicle fuel.
4 Technical Requirements and Test Methods
4.1 The technical indexes of compressed natural gas shall be in accordance with those specified in Table 1.
4.2 The calculation of gross calorific value of natural gas shall be carried out in accordance with GB/T 11062, and the determination of the natural gas composition on which it is based shall be carried out in accordance with GB/T 13610.
4.3 The determination of the total sulfur content in natural gas shall be carried out in accordance with GB/T 11061.
4.4 The determination of the hydrogen sulfide content in natural gas shall be carried out in accordance with GB/T 11060.1.
4.5 The determination of the carbon dioxide content in natural gas shall be carried out in accordance with GB/T 13610.
4.6 The determination of the oxygen gas in natural gas shall be carried out in accordance with GB/T 13610.
4.7 The determination of the water dew point of natural gas shall be carried out in accordance with GB/T 17283.
Foreword I
1 Scope
2 Normative References
3 Definitions
4 Technical Requirements and Test Methods
5 Storage and Use
6 Inspection
Appendix A (Informative) Calculation Method of Methane Number
Appendix B (Informative) Types of Compressed Natural Gas as Fuel
