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GB 18047-2017

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标准号码内文价格(元)第2步交付天数标准名称状态
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标准编号: GB 18047-2017 (GB18047-2017)
中文名称: 车用压缩天然气
英文名称: Compressed natural gas as vehicle fuel
行业: 国家标准
中标分类: E24
字数估计: 8,899
发布日期: 2017-09-07
实施日期: 2018-04-01
旧标准 (被替代): GB 18047-2000
起草单位: 中国石油西南油气田分公司天然气研究院、中国市政工程华北设计研究总院、中国石油工程建设公司华东设计分公司、中国海洋石油总公司研究总院
归口单位: 全国天然气标准化技术委员会(SAC/TC 244)
发布机构: 中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会

GB 18047-2017
Compressed natural gas as vehicle fuel
ICS 75.060
E24
中华人民共和国国家标准
代替GB 18047-2000
车 用 压 缩 天 然 气
2017-09-07发布
2018-04-01实施
中华人民共和国国家质量监督检验检疫总局
中国国家标准化管理委员会发布
前言
本标准的第4.1条为强制性的,其余为推荐性的。
本标准按照GB/T 1.1-2009给出的规则起草。
本标准代替 GB 18047-2000《车用压缩天然气》。本标准与 GB 18047-2000相比的主要变化
如下:
---修改了总硫的技术指标,由“不大于200mg/m3”修改到“不大于100mg/m3”(见表1);
---修改了水露点的技术指标,最低要求由“在最高操作压力下,水露点不应高于-13℃”修改到
ISO 15403-2:2006推荐的“水的质量浓度不大于30mg/m3”;
---增加了各项指标的检验方法,并同时指出了仲裁方法;
---修改了附录B中燃气的类别,修改了10T和12T燃气的指标,取消了13T燃气。
本标准由全国天然气标准化技术委员会(SAC/TC244)归口。
本标准起草单位:中国石油西南油气田分公司天然气研究院、中国市政工程华北设计研究总院、中
国石油工程建设公司华东设计分公司、中国海洋石油总公司研究总院。
本标准主要起草人:唐蒙、吴洪松、迟永杰、张艳霞、何斌、何永明、崔德春、李胜山。
本标准所代替标准的历次版本发布情况为:
---GB 18047-2000。
车 用 压 缩 天 然 气
1 范围
本标准规定了车用压缩天然气的技术要求和试验方法。
本标准适用于压力不大于25MPa,作为车用燃料的压缩天然气。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文
件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 11060.1 天然气 含硫化合物的测定 第1部分:用碘量法测定硫化氢含量
GB/T 11060.2 天然气 含硫化合物的测定 第2部分:用亚甲蓝法测定硫化氢含量
GB/T 11060.3 天然气 含硫化合物的测定 第3部分:用乙酸铅反应速率双光路检测法测定硫
化氢含量
GB/T 11060.4 天然气 含硫化合物的测定 第4部分:用氧化微库仑法测定总硫含量
GB/T 11060.5 天然气 含硫化合物的测定 第5部分:用氢解-速率计比色法测定总硫含量
GB/T 11060.7 天然气 含硫化合物的测定 第7部分:用林格奈燃烧法测定总硫含量
GB/T 11060.8 天然气 含硫化合物的测定 第8部分:用紫外荧光光度法测定 总硫含量
GB/T 11062 天然气 发热量、密度、相对密度和沃泊指数的计算方法
GB/T 13609 天然气取样导则
GB/T 13610 天然气的组成分析 气相色谱法
GB/T 13611-2006 城镇燃气分类和基本特性
GB/T 17258 汽车用压缩天然气钢瓶
GB/T 17283 天然气水露点的测定 冷却镜面凝析湿度计法
GB/T 18619.1 天然气中水含量的测定 卡尔费休-库仑法
GB/T 19158 站用压缩天然气钢瓶
GB/T 21069 天然气 高压下水含量的测定
GB/T 22634 天然气水含量与水露点之间的换算
GB/T 27894.3 天然气 在一定不确定度下用气相色谱法测定组成 第3部分:用两根填充柱测
定氢、氦、氧、氮、二氧化碳和直至C8的烃类
GB/T 27894.4 天然气 在一定不确定度下用气相色谱法测定组成 第4部分:实验室和在线测
量系统中用两根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类
GB/T 27894.5 天然气 在一定不确定度下用气相色谱法测定组成 第5部分:实验室和在线工
艺系统中用三根色谱柱测定氮、二氧化碳和C1至C5及C6+的烃类
GB/T 27894.6 天然气 在一定不确定度下用气相色谱法测定组成 第6部分:用三根毛细柱测
定氢、氦、氧、氮、二氧化碳和C1至C8的烃类
GB/T 27896 天然气中水含量的测定 电子分析法
TSGR0004 固定式压力容器安全技术监察规程
3 术语和定义
下列术语和定义适用于本文件。
3.1
压缩天然气 compressednaturalgas;CNG
主要成分为甲烷的压缩气体燃料。
3.2
以专用压力容器储存的,用作车用燃料的压缩天然气。
4 技术要求和试验方法
4.1 车用压缩天然气的技术指标应符合表1的规定。
表1 车用压缩天然气的技术指标
项 目 技术指标
高位发热量a/(MJ/m3) ≥ 31.4
总硫(以硫计)a/(mg/m3) ≤ 100
硫化氢a/(mg/m3) ≤ 15
二氧化碳 mol∶mol/% ≤ 3.0
氧气 mol∶mol/% ≤ 0.5
水a/(mg/m3)
在汽车驾驶的特定地理区域内,在压力不大于25MPa和环境温度不低于-13℃
水露点/℃
在汽车驾驶的特定地理区域内,在压力不大于25MPa和环境温度低于-13℃的
条件下,水露点应比最低环境温度低5℃
a 本标准中气体体积的标准参比条件是101.325kPa,20℃。
4.2 车用压缩天然气高位发热量的计算应按GB/T 11062执行,其所依据的天然气组成的测定应按
GB/T 13610、GB/T 27894.3、GB/T 27894.4、GB/T 27894.5或GB/T 27894.6执行,仲裁试验方法为
GB/T 13610。
4.3 车用压缩天然气中总硫含量的测定应按 GB/T 11060.4、GB/T 11060.5、GB/T 11060.7或
GB/T 11060.8执行,仲裁试验方法为GB/T 11060.4。
仲裁试验方法GB/T 11060.1。
4.5 车用天然气中二氧化碳含量的测定应按GB/T 13610、GB/T 27894.3、GB/T 27894.4、GB/T 27894.5
或GB/T 27894.6执行,仲裁试验方法为GB/T 13610。
4.6 车用天然气中氧气含量的测定应按GB/T 13610、GB/T 27894.3、GB/T 27894.4、GB/T 27894.5
或GB/T 27894.6执行,仲裁试验方法为GB/T 13610。
4.7 车用压缩天然气水含量和水露点的测定应按GB/T 17283、GB/T 18619.1、GB/T 21069或GB/T 27896
执行,仲裁试验方法GB/T 17283。当水露点已知时,可按GB/T 22634将其换算到标准参比条件下的
水含量。
5 储存和使用
符合GB/T 17258的有关规定。
5.2 在操作压力和温度下,车用压缩天然气中不应存在液态烃。
5.3 车用压缩天然气中固体颗粒直径应小于5μm。
5.4 车用压缩天然气应具有可以察觉的臭味。无臭味或臭味不足的天然气应加臭。加臭剂的最小量
应符合当天然气泄漏到空气中,达到爆炸下限的20%浓度时,应能察觉。加臭剂常用具有明显臭味的
化合物配制。
5.5 车用压缩天然气在使用时,应考虑其抗爆性能。附录A给出了天然气甲烷值的计算方法。
5.6 车用压缩天然气在使用时,应考虑其沃泊指数(华白数),同一地区的压缩天然气,其燃气类别宜应
保持不变。附录B给出了压缩天然气的燃气类别。
6.1 车用压缩天然气的取样按GB/T 13609进行。
6.2 正常生产时,必须每天对产品水含量进行检验,以确保压缩天然气中不存在液态水。
6.3 在下列情况下,车用压缩天然气产品应按本标准规定的技术要求进行全面检验:
a) 初次投入生产时;
b) 正常生产时,定期或积累一定产量后;
c) 工艺发生重大变化时;
d) 检验结果与上次全面检验有较大差异时。
附 录 A
(资料性附录)
A.1 甲烷值的定义
甲烷值 MN MethaneNumber
表示点燃式发动机燃料抗爆性的一个约定数值。
一种气体燃料的甲烷值是用ASTM的辛烷值评定方法,在规定条件下的标准发动机试验中,将该
燃料与标准燃料混合物的爆震倾向进行比较而测定的。当被测气体燃料的抗爆性能与按一定比例混合
的甲烷和氢气混合气标准燃料的抗爆性能相同时,该标准燃料中甲烷的体积百分数的数值是该气体燃
料的甲烷值。
A.2 辛烷值与甲烷值
A.2.1 辛烷值与甲烷值的关联
测量结果表明,纯甲烷的 MON在140左右,大多数天然气的 MON在115~130之间。丙烷含量高
(17%~25%)的调峰气的 MON为96~97。美国气体研究院通过研究分别推导出两个与实验数据非
常吻合的、组成或氢碳比与辛烷值的关联式,可适用于大多数常规天然气。此外,还有两个用实验数据
推导的辛烷值与甲烷值的关联式。这些关联式如下。
A.2.2 天然气组成与辛烷值的线性关联式
天然气组成与辛烷值的线性关联式见式(A.1):
MON=137.78x1+29.948x2-18.193x3
-167.062x4+181.233x5+26.994x6 (A.1)
式中:
xi ---组分i的摩尔分数,各组分的代号和名称见表A.1。
表A.1 气体燃料中组分代号和名称
组分代号 1 2 3 4 5 6
组分名称 甲烷 乙烷 丙烷 丁烷 二氧化碳 氮气
A.2.3 天然气氢碳比与辛烷值关联式
天然气氢碳比与辛烷值关联式见式(A.2):
MON=-406.14+508.04R-173.55R2+20.17R3 (A.2)
式中:
R---气体燃料氢原子与碳原子数目的比值。
天然气甲烷值与辛烷值的关联式见式(A.3)和式(A.4):
MN=1.445MON-103.42 (A.3)
MON=0.679MN+72.3 (A.4)
式(A.3)和式(A.4)不是完全线性的(r2=0.98),因此,这两个关联式相互间并不是完全可逆的。
附 录 B
(资料性附录)
压缩天然气的燃气类别
根据GB/T 13611-2006《城镇燃气分类和基本特性》,并结合本标准技术指标中天然气高位发热
量大于31.4MJ/m3的要求,按沃泊指数(华白数)W 和燃烧势CP的要求,压缩天然气可分为10T和
沃泊指数(华白数)W(Wobbeindex)按式(B.1)计算:
W =
HS
(B.1)
式中:
W ---燃气的沃泊指数(华白数),单位为兆焦每立方米(MJ/m3);
HS ---燃气的体积高位发热量,单位为兆焦每立方米(MJ/m3);
d ---燃气的相对密度(空气的相对密度为1)。
表B.1 同时符合本标准和GB/T 13611-2006的燃气类别
GB/T 13611-2006
的燃气分类
GB/T 13611-2006规定值
101.325kPa,15℃(干)
换算到
101.325kPa,20℃(干)
沃泊指数(高华白数) 沃泊指数(高华白数)
标 准
MJ/m3
MJ/m3
标 准
MJ/m3
范 围
MJ/m3
燃烧势CP
标准 范围
10T 41.52 39.0~44.84 40.79 38.37~44.05 33.0 31.0~34.3
12T 50.73 45.6~54.78 49.83 44.86~53.81 40.3 40.3~69.3

GB 18047-2017
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
车用压缩天然气
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.
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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.
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.
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 by 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
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,
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 C6+ hydrocarbons for a laboratory and on-
line process application using three columns
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
4.2 The calculation of the higher heating value of compressed natural gas as
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.
4.4 The determination of the content of hydrogen sulfide in compressed natural
gas as vehicle fuel shall be carried out according to GB/T 11060.1, GB/T
11060.2, or GB/T 11060.3. The arbitration test method is GB/T 11060.1.
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.
4.6 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. The arbitration test method is GB/T
17283. When the water dew point is known, according to GB/T 22634, it can be
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.
5.3 The diameter of solid particles in compressed natural gas as vehicle fuel
shall be less than 5 μm.
odorize the natural gas which is odorless or of inadequate odor. The minimum
amount of odorant shall conform to that, when natural gas leaks into the air and
reaches 20% concentration of lower explosive limit, it shall be detected. Usually
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
The methane number of a gas fuel is determined by using ASTM’s evaluation
method of octane number, by comparing the detonation tendency of this fuel
with that of a standard fuel mixture in a standard engine test under specified
conditions. When the antiknock performance of the tested gas fuel is the same
as that of the standard fuel mixture of methane and hydrogen in a certain
proportion, the number of volume percentage of methane in the standard fuel
is the methane number of the gas fuel.
A.2 Octane number and methane number
A.2.1 Correlation between octane number and methane number
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
A.2.2 Linear correlation between the composition of natural gas and
octane number
The linear correlation between the composition of natural gas and octane
number is shown in the equation (A.1).
   
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