GB 18047-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 18047-2017 | English | 115 |
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Compressed natural gas as vehicle fuel
| Valid |
| GB 18047-2000 | English | 279 |
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Compressed natural gas as vehicle fuel
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GB 18047-2017: Compressed natural gas as vehicle fuel---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB18047-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.060
E 24
Replacing GB 18047-2000
Compressed natural gas as vehicle fuel
Issued on. SEPTEMBER 7, 2017
Implemented on. APRIL 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 5
4 Technical requirements and test methods... 6
5 Storage and use... 7
6 Inspection... 8
Appendix A (Informative) Calculation method of methane number... 9
Appendix B (Informative) Gas categories of compressed natural gas... 11
Foreword
Article 4.1 of this Standard is mandatory. The rest are recommendatory.
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB 18047-2000 “Compressed natural gas as vehicle
fuel”. As compared with GB 18047-2000, the main changes of this Standard
are as follows.
- REVISE technical specifications for total sulfur. It is changed from “not more
than 200 mg/m3” to “not more than 100 mg/m3” (SEE Table 1);
- REVISE technical specifications for water dew point. The minimum
requirement that “under the maximum operating pressure, the water dew
point shall be not higher than -13 °C” is changed to “the mass concentration
of water shall not be more than 30 mg/m3”, which is recommended in ISO
15403-2.2006;
- ADD test methods for various indicators and POINT out arbitration methods
at the same time;
- MODIFY the gas categories in Appendix B; MODIFY the indicators for 10T
and 12T gas; CANCEL 13T gas.
This Standard shall be under the jurisdiction of China National Gas
Standardization Technology Committee (SAC/TC 244).
Drafting organizations of this Standard. PetroChina Southwest Oil & Gasfield
Branch Natural Gas Research Institute, North China Municipal Engineering
Design & Research Institute Co., Ltd., China Petroleum Engineering &
Construction Corp East China Design Branch, China National Offshore Oil
Corporation Research Institute.
Main drafters of this Standard. Tang Meng, Wu Hongsong, Chi Yongjie, Zhang
Yanxia, He Bin, He Yongming, Cui Dechun, Li Shengshan.
The previous release of version of the standard replaced by this Standard is.
- GB 18047-2000.
Compressed natural gas as vehicle fuel
1 Scope
This Standard specifies the technical requirements and test methods of
compressed natural gas as vehicle fuel.
This Standard applies to the compressed natural gas of which the pressure is
not more than 25 MPa as vehicle fuel.
2 Normative references
The following documents are essential to the application of this document. For
the dated references, only the versions with the dates indicated are applicable
to this document. For the undated references, the latest version (including all
the amendments) are applicable to this document.
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
3 Terms and definitions
The following terms and definitions are applicable to this document.
3.1 Compressed natural gas; CNG
The compressed gas fuel of which the main component is methane.
4 Technical requirements and test methods
4.1 The technical specifications of compressed natural gas as vehicle fuel shall
conform to the provisions of Table 1.
4.2 The calculation of the higher heating value of compressed natural gas as
vehicle fuel shall be carried out according to GB/T11062.The determination of
the composition of natural gas on which it is based shall be carried out
according to GB/T13610, GB/T 27894.3, GB/T 27894.4, GB/T 27894.5, or GB/T
27894.6.The arbitration test method is GB/T 13610.
4.3 The determination of the content of total sulfur in compressed natural gas
as vehicle fuel shall be carried out according to GB/T 11060.4, GB/T 11060.5,
GB/T 11060.7, or GB/T 11060.8.The arbitration test method is GB/T 11060.4.
4.6 The determination of oxygen content in natural gas as vehicle fuel shall be
carried out according to GB/T 13610, GB/T 27894.3, GB/T 27894.4, GB/T
27894.5, or GB/T 27894.6.The arbitration test method is GB/T 13610.
4.7 The determination of water content and water dew point of compressed
natural gas as vehicle fuel shall be carried out according to GB/T 17283, GB/T
18619.1, GB/T 21069, or GB/T 27896.
5 Storage and use
5.1 The storage vessels of compressed natural gas shall comply with the
relevant provisions of TSGR 0004 or GB/T 19158.The steel cylinders for
compressed natural gas as vehicle fuel shall comply with the relevant
provisions of GB/T 17258.
5.2 Under operating pressure and temperature, there shall be no liquid
hydrocarbon in compressed natural gas as vehicle fuel.
5.5 When using compressed natural gas as vehicle fuel, it shall consider the
antiknock performance. The calculation method of methane number of natural
gas is given in Appendix A.
5.6 When using compressed natural gas as vehicle fuel, it shall consider the
Wobbe index. The gas category of compressed natural gas in the same area
shall be kept unchanged. The gas categories of compressed natural gas are
given in Appendix B.
6 Inspection
6.1 The sampling of compressed natural gas as vehicle fuel shall be carried out
according to GB/T 13609.
6.2 In normal production, the water content of products must be inspected daily,
to ensure that there is no liquid water in compressed natural gas.
Appendix A
(Informative)
Calculation method of methane number
A.1 Definition of methane number
MN Methane Number
An agreed value which represents the antiknock quality of fuel of spark ignition
engine.
A.2 Octane number and methane number
A.2.1 Correlation between octane number and methane number
The U.S. Gas Technology Institute (GRI) [should be. GTI] used ASTM’s
evaluation method of octane number to measure the motor octane number
(MON) of gas fuel. The measurement results show that, the MON of pure
methane is about 140; the MON of most natural gas is 115~130.The MON of
peak-shaving gas with high propane content (17%~25%) is 96~97.The GRI
[should be. GTI], through its research, has derived two correlations between
composition or hydrogen-carbon ratio and octane number, which are in good
agreement with the experimental data, and can be applied to most conventional
natural gas. In addition, there are two correlations between octane number and
methane number derived from experimental data. These correlations are as
follows.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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