Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
Article 4.1 of this standard is mandatory and the rest are recommendatory.
This standard is developed in accordance with the rules given in GB/T 1.1-2009
This standard replaces GB 18047-2000 Compressed Natural Gas as Vehicle Fuel. The following technical changes have been made with respect to GB/T 18047-2000 (the previous edition).
——Technical indexes of total sulfur are modified, from "no greater than 200 mg / m3" into "no greater than 100 mg/m3 (see Table 1);
——The technical indexes of water dew point are modified, the minimum requirements are modified from "under maximum working pressure, the water dew point shall not be higher than -13℃" into "mass concentration of water is no greater than 30 mg/m3" as recommended in ISO 15403-2:2006;
——Testing method of various indexes is added and arbitration method is indicated meanwhile;
—— Category of gas in Annex B is modified, indexes of 10 T and 12 T gas are modified, and 13 T gas is cancelled.
This standard is under the jurisdiction of National Technical Committee on Natural Gas of Standardization Administration of China (SAC/TC 244).
The previous edition replaced by this standard is as follows:
——GB 18047-2000.
Compressed Natural Gas as Vehicle Fuel
1 Scope
This standard specifies technical requirements and test methods of compressed natural gas as vehicle fuel.
This standard is applicable to compressed natural gas as vehicle fuel at the pressure no greater than 25 MPa.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 11060.1 Natural Gas - Determination of Sulfur Compound - Part 1: Determination of Hydrogen Sulfide Content by Iodometric Titration Method
GB/T 11060.2 Natural Gas - Determination of Sulfur Compound - Part 2: Determination of Hydrogen Sulfide Content by Methylene Blue Method
GB/T 11060.3 Natural Gas - Determination of Sulfur Compound - Part 3:Determination of Hydrogen Sulfide Content by Lead Acetate Reaction Rate Dual Photo Path Method
GB/T 11060.4 Natural Gas - Determination of Sulfur Compound - Part 4: Determination of Total Sulfur Content by Oxidative Microcoulometry Method
GB/T 11060.5 Natural Gas - Determination of Sulfur Compound - Part 5:Determination of Total Sulfur Content by Hydrogenolysis and Rateometric Colorimetry Method
GB/T 11060.7 Natural Gas - Determination of Sulfur Compounds - Part 7:Determination Of Total Sulfur Content by Lingener Combustion Method
GB/T 11060.8 Natural Gas - Determination of Sulfur Compound - Part 8: Determination of Total Sulfur Content by Ultraviolet Fluorescence Method
GB/T 11062 Natural Gas - Calculation of Calorific Values, Density, Relative Density and Wobbe Index from Composition
GB/T 13609 Natural Gas - Sampling Guidelines
GB/T 13610 Analysis of Natural Gas Composition - Gas Chromatography
GB/T 13611-2006 Classification and Essential Property of City Gas
GB/T 17258 Steel Cylinders for the On-board Storage of Compressed Natural Gas as a Fuel for Automotive Vehicles
GB/T 17283 Determination of the Water Dew Point of Natural Gas - Cooled Surface Condensation Hygrometers
GB/T 18619.1 Natural gas - Determination of Water by the Karl Fischer Method - Coulometric Procedure
GB/T 19158 Steel Cylinders for the Storage of Compressed Natural Gas
GB/T 21069 Natural gas - Determination of Water Content at High Pressure
GB/T 22634 Conversion between Water Content and Water Dew Point of Natural Gas
GB/T 27894.3 Natural Gas - Determination of Composition With Defined Uncertainty by Gas Chromatography - Part 3: Determination Of Hydrogen, Helium, Oxygen, Nitrogen, Carbon Dioxide and Hydrocarbons Up to C8 Using Two Packed Columns
GB/T 27894.4 Natural Gas - Determination of Composition with Defined Uncertainty by Gas Chromatography - Part 4: Determination of Nitrogen, Carbon Dioxide and C1 to C5 and C6+ Hydrocarbons for A Laboratory and On-line Measuring System Using Two Columns
GB/T 27894.5 Natural Gas - Determination of Composition With Defined Uncertainty by Gas Chromatography - Part 5:Determination of Nitrogen, Carbon Dioxide and C1 to C5 and C+6 Hydrocarbons for A Laboratory and On-line Process Application Using Three Columns
GB/T 27894.6 Natural Gas - Determination of Composition with Defined Uncertainty by Gas Chromatography - Part 6: Determination of Hydrogen Helium Oxygen Nitrogen Carbon Dioxide and C1 to C8 Hydrocarbons Using Three Capillary Columns
GB/T 27896 Test Method for Water Vapor Content of Natural Gas Using - Electronic Moisture Analyzers
TSGR 0004 Supervision Regulation on Safety Technology for Stationary Pressure Vessel
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
compressed natural gas; CNG
compressed gas fuel with the principal ingredient of methane
3.2
compressed natural gas as vehicle fuel
Compressed natural gas stored with pressure vessel and used as vehicle fuel
4 Technical Requirements and Test Methods
4.1 The technical indexes of compressed natural gas as vehicle fuel shall be in accordance with those specified in Table 1
Table 1 Technical Indexes of Compressed Natural Gas as Vehicle Fuel
Item Technical index
Higher heating value a/(MJ/m3) ≥ 31.4
Total sulfur (calculated on sulfur)a/(mg/m3) ≤ 100
Hydrogen sulfide a/(mg/m3) ≤ 15
Carbon dioxide mol: mol/% ≤ 3.0
Oxygen mol: mol/% ≤ 0.5
Water a/(mg/m3) ≤ Within specific geographical region of automobile driving, on the premise of pressure no greater than 25 MPa and ambient temperature no less than -13℃, the mass concentration of water shall not be greater than 30 mg/m3.
Water dew point /℃ Within specific geographical region of automobile driving, on the premise of pressure no greater than 25 MPa and ambient temperature below -13℃, water dew point shall be 5℃ lower than minimum ambient temperature.
a In this standard, the standard reference condition for the gas volume is 101.325kPa and 20℃.
4.2 Calculation of higher heating value for compressed natural gas as vehicle fuel shall be implemented according to GB/T 11062, the determination for composition of the based natural gas shall be implemented in accordance with GB/T 13610, GB/T 27894.3, GB/T 27894.4, GB/T 27894.5 or GB/T 27894.6, and the arbitration test method is GB/T 13610.
4.3 Determination of total sulfur content in compressed natural gas as vehicle fuel shall be implemented according to GB/T 11060.4, GB/T 11060.5, GB/T 11060.7 or GB/T 11060.8, and the arbitration test method is GB/T 11060.4.
4.4 Determination of hydrogen sulfide content in compressed natural gas as vehicle fuel shall be implemented according to GB/T 11060.1, GB/T 11060.2 or GB/T 11060.3 and the arbitration test method is GB/T 11060.1.
4.5 Determination of carbon dioxide content in natural gas for vehicle shall be implemented according to GB/T 13610, GB/T 27894.3, GB/T 27894.4, GB/T 27894.5 or GB/T 27894.6, and the arbitration test method is GB/T 13610.
4.6 Determination of oxygen content in natural gas for vehicle shall be implemented according to GB/T 13610, GB/T 27894.3, GB/T 27894.4, GB/T 27894.5 or GB/T 27894.6, and the arbitration test method is GB/T 13610.
4.7 Determination of water content and water dew point for compressed natural gas as vehicle fuel shall be implemented according to GB/T 17283, GB/T 18619.1, GB/T 21069 or GB/T 27896, and the arbitration test method is GB/T 17283. When the water dew point is given, its conversion into water content under standard reference conditions may be conducted according to GB/T 22634.
5 Storage and Use
5.1 The storage container of compressed natural gas shall meet the relevant requirements of TSGR 0004 or GB/T 19158. Steel cylinders for the on-board storage of compressed natural gas as a fuel for vehicles shall meet the relevant requirements of GB/T 17258.
5.2 Under operation pressure and temperature, liquid hydrocarbon shall not exist in compressed natural gas as vehicle fuel.
5.3 Solid particle diameter in compressed natural gas as vehicle fuel shall be less than 5μm.
5.4 Compressed natural gas as vehicle fuel shall be provided with perceptible odor. Natural gas without odor or insufficient odor shall be odorized. Minimal dose of odorant shall be perceptible when the natural gas is leaked into the air and reaches 20% concentration of lower explosive limit. Odorant is generally be prepared by compound with obvious odor.
5.5 When the compressed natural gas as vehicle fuel is under use, its antiknock property shall be considered. Annex A gives out the calculation method of natural gas methane number.
5.6 Where compressed natural gas as vehicle fuel is used, its Wobbe index shall be considered; as for the compressed natural gas in the same region, the gas category should remain constant. Annex B gives out the gas category of compressed natural gas.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements and Test Methods
5 Storage and Use
6 Inspection
Annex A (Informative) Calculation Method of Methane Number
Annex B (Informative) Category of Compressed Natural Gas
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
Article 4.1 of this standard is mandatory and the rest are recommendatory.
This standard is developed in accordance with the rules given in GB/T 1.1-2009
This standard replaces GB 18047-2000 Compressed Natural Gas as Vehicle Fuel. The following technical changes have been made with respect to GB/T 18047-2000 (the previous edition).
——Technical indexes of total sulfur are modified, from "no greater than 200 mg / m3" into "no greater than 100 mg/m3 (see Table 1);
——The technical indexes of water dew point are modified, the minimum requirements are modified from "under maximum working pressure, the water dew point shall not be higher than -13℃" into "mass concentration of water is no greater than 30 mg/m3" as recommended in ISO 15403-2:2006;
——Testing method of various indexes is added and arbitration method is indicated meanwhile;
—— Category of gas in Annex B is modified, indexes of 10 T and 12 T gas are modified, and 13 T gas is cancelled.
This standard is under the jurisdiction of National Technical Committee on Natural Gas of Standardization Administration of China (SAC/TC 244).
The previous edition replaced by this standard is as follows:
——GB 18047-2000.
Compressed Natural Gas as Vehicle Fuel
1 Scope
This standard specifies technical requirements and test methods of compressed natural gas as vehicle fuel.
This standard is applicable to compressed natural gas as vehicle fuel at the pressure no greater than 25 MPa.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 11060.1 Natural Gas - Determination of Sulfur Compound - Part 1: Determination of Hydrogen Sulfide Content by Iodometric Titration Method
GB/T 11060.2 Natural Gas - Determination of Sulfur Compound - Part 2: Determination of Hydrogen Sulfide Content by Methylene Blue Method
GB/T 11060.3 Natural Gas - Determination of Sulfur Compound - Part 3:Determination of Hydrogen Sulfide Content by Lead Acetate Reaction Rate Dual Photo Path Method
GB/T 11060.4 Natural Gas - Determination of Sulfur Compound - Part 4: Determination of Total Sulfur Content by Oxidative Microcoulometry Method
GB/T 11060.5 Natural Gas - Determination of Sulfur Compound - Part 5:Determination of Total Sulfur Content by Hydrogenolysis and Rateometric Colorimetry Method
GB/T 11060.7 Natural Gas - Determination of Sulfur Compounds - Part 7:Determination Of Total Sulfur Content by Lingener Combustion Method
GB/T 11060.8 Natural Gas - Determination of Sulfur Compound - Part 8: Determination of Total Sulfur Content by Ultraviolet Fluorescence Method
GB/T 11062 Natural Gas - Calculation of Calorific Values, Density, Relative Density and Wobbe Index from Composition
GB/T 13609 Natural Gas - Sampling Guidelines
GB/T 13610 Analysis of Natural Gas Composition - Gas Chromatography
GB/T 13611-2006 Classification and Essential Property of City Gas
GB/T 17258 Steel Cylinders for the On-board Storage of Compressed Natural Gas as a Fuel for Automotive Vehicles
GB/T 17283 Determination of the Water Dew Point of Natural Gas - Cooled Surface Condensation Hygrometers
GB/T 18619.1 Natural gas - Determination of Water by the Karl Fischer Method - Coulometric Procedure
GB/T 19158 Steel Cylinders for the Storage of Compressed Natural Gas
GB/T 21069 Natural gas - Determination of Water Content at High Pressure
GB/T 22634 Conversion between Water Content and Water Dew Point of Natural Gas
GB/T 27894.3 Natural Gas - Determination of Composition With Defined Uncertainty by Gas Chromatography - Part 3: Determination Of Hydrogen, Helium, Oxygen, Nitrogen, Carbon Dioxide and Hydrocarbons Up to C8 Using Two Packed Columns
GB/T 27894.4 Natural Gas - Determination of Composition with Defined Uncertainty by Gas Chromatography - Part 4: Determination of Nitrogen, Carbon Dioxide and C1 to C5 and C6+ Hydrocarbons for A Laboratory and On-line Measuring System Using Two Columns
GB/T 27894.5 Natural Gas - Determination of Composition With Defined Uncertainty by Gas Chromatography - Part 5:Determination of Nitrogen, Carbon Dioxide and C1 to C5 and C+6 Hydrocarbons for A Laboratory and On-line Process Application Using Three Columns
GB/T 27894.6 Natural Gas - Determination of Composition with Defined Uncertainty by Gas Chromatography - Part 6: Determination of Hydrogen Helium Oxygen Nitrogen Carbon Dioxide and C1 to C8 Hydrocarbons Using Three Capillary Columns
GB/T 27896 Test Method for Water Vapor Content of Natural Gas Using - Electronic Moisture Analyzers
TSGR 0004 Supervision Regulation on Safety Technology for Stationary Pressure Vessel
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
compressed natural gas; CNG
compressed gas fuel with the principal ingredient of methane
3.2
compressed natural gas as vehicle fuel
Compressed natural gas stored with pressure vessel and used as vehicle fuel
4 Technical Requirements and Test Methods
4.1 The technical indexes of compressed natural gas as vehicle fuel shall be in accordance with those specified in Table 1
Table 1 Technical Indexes of Compressed Natural Gas as Vehicle Fuel
Item Technical index
Higher heating value a/(MJ/m3) ≥ 31.4
Total sulfur (calculated on sulfur)a/(mg/m3) ≤ 100
Hydrogen sulfide a/(mg/m3) ≤ 15
Carbon dioxide mol: mol/% ≤ 3.0
Oxygen mol: mol/% ≤ 0.5
Water a/(mg/m3) ≤ Within specific geographical region of automobile driving, on the premise of pressure no greater than 25 MPa and ambient temperature no less than -13℃, the mass concentration of water shall not be greater than 30 mg/m3.
Water dew point /℃ Within specific geographical region of automobile driving, on the premise of pressure no greater than 25 MPa and ambient temperature below -13℃, water dew point shall be 5℃ lower than minimum ambient temperature.
a In this standard, the standard reference condition for the gas volume is 101.325kPa and 20℃.
4.2 Calculation of higher heating value for compressed natural gas as vehicle fuel shall be implemented according to GB/T 11062, the determination for composition of the based natural gas shall be implemented in accordance with GB/T 13610, GB/T 27894.3, GB/T 27894.4, GB/T 27894.5 or GB/T 27894.6, and the arbitration test method is GB/T 13610.
4.3 Determination of total sulfur content in compressed natural gas as vehicle fuel shall be implemented according to GB/T 11060.4, GB/T 11060.5, GB/T 11060.7 or GB/T 11060.8, and the arbitration test method is GB/T 11060.4.
4.4 Determination of hydrogen sulfide content in compressed natural gas as vehicle fuel shall be implemented according to GB/T 11060.1, GB/T 11060.2 or GB/T 11060.3 and the arbitration test method is GB/T 11060.1.
4.5 Determination of carbon dioxide content in natural gas for vehicle shall be implemented according to GB/T 13610, GB/T 27894.3, GB/T 27894.4, GB/T 27894.5 or GB/T 27894.6, and the arbitration test method is GB/T 13610.
4.6 Determination of oxygen content in natural gas for vehicle shall be implemented according to GB/T 13610, GB/T 27894.3, GB/T 27894.4, GB/T 27894.5 or GB/T 27894.6, and the arbitration test method is GB/T 13610.
4.7 Determination of water content and water dew point for compressed natural gas as vehicle fuel shall be implemented according to GB/T 17283, GB/T 18619.1, GB/T 21069 or GB/T 27896, and the arbitration test method is GB/T 17283. When the water dew point is given, its conversion into water content under standard reference conditions may be conducted according to GB/T 22634.
5 Storage and Use
5.1 The storage container of compressed natural gas shall meet the relevant requirements of TSGR 0004 or GB/T 19158. Steel cylinders for the on-board storage of compressed natural gas as a fuel for vehicles shall meet the relevant requirements of GB/T 17258.
5.2 Under operation pressure and temperature, liquid hydrocarbon shall not exist in compressed natural gas as vehicle fuel.
5.3 Solid particle diameter in compressed natural gas as vehicle fuel shall be less than 5μm.
5.4 Compressed natural gas as vehicle fuel shall be provided with perceptible odor. Natural gas without odor or insufficient odor shall be odorized. Minimal dose of odorant shall be perceptible when the natural gas is leaked into the air and reaches 20% concentration of lower explosive limit. Odorant is generally be prepared by compound with obvious odor.
5.5 When the compressed natural gas as vehicle fuel is under use, its antiknock property shall be considered. Annex A gives out the calculation method of natural gas methane number.
5.6 Where compressed natural gas as vehicle fuel is used, its Wobbe index shall be considered; as for the compressed natural gas in the same region, the gas category should remain constant. Annex B gives out the gas category of compressed natural gas.
Contents of GB 18047-2017
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements and Test Methods
5 Storage and Use
6 Inspection
Annex A (Informative) Calculation Method of Methane Number
Annex B (Informative) Category of Compressed Natural Gas
