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燃气汽车专用手动截止阀
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QCT 917-2013
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标准编号: QC/T 917-2013 (QC/T917-2013)
中文名称: 燃气汽车专用手动截止阀
英文名称: Manual valve for gas vehicle
行业: 汽车行业标准 (推荐)
中标分类: T47
国际标准分类: 43.040.60
字数估计: 17,172
引用标准: GB/T 191; GB/T 7762; GB/T 9969; GB/T 10125; GB/T 17895; GB 18047; GB 19159; GB/T 19239; GB/T 19240; QC/T 245; QC/T 247; QC/T 746
起草单位: 中国汽车工程研究院股份有限公司
归口单位: 全国汽车标准化技术委员会
标准依据: 工业和信息化部公告2013年第23号;行业标准备案公告2013年第12号(总第168号)
范围: 本标准规定了燃气汽车专用手动截止阀(以下简称截止阀)的定义、结构要求、技术要求、试验方法、检验规则、标志、包装、运输及储存。本标准适用于额定工作压力不大于20MPa(本标准所述压力均指表压)、环境温度为-40℃～+85℃、工作介质符合GB 18047要求的汽车用压缩天然气截止阀(以下简称CNG截止阀)及额定工作压力不大于2.2MPa、环境温度为-40℃～+85℃、工作介质符合GB 19159要求的汽车用液化石油气截止阀(以下简称LPG截止阀)。
QC/T 917-2013: 燃气汽车专用手动截止阀
QC/T 917-2013 英文名称: Manual valve for gas vehicle
中 华 人 民 共 和 国 汽 车 行 业 标 准
QC/T 917—2013
中华人民共和国工业和信息化部 发布
1 范围
本标准规定了燃气汽车专用手动截止阀(以下简称截止阀)的定义、结构要求、技术要求、试验方法、检验规则、
标志、包装、运输及储存。
本标准适用于额定工作压力不大于20MPa (本标准所述压力均指表压)、环境温度为-40℃~+ 85℃、工作介质
符合GB 18047要求的汽车用压缩天然气截止阀(以下简称CNG 截止阀)及额定工作 压力不大于2.2MPa、环境
温度为-40℃~+85℃、工作介质符合 GB 19159 要求的汽车用液化石油气截止阀(以下简称LPG 截止阀)。
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/T191包装储运图示标志GB/T 7762
硫化橡胶耐臭氧老化试验 静态拉伸试验法GB/T 9969 工业产品使用说明书 总则GB/T10125 人造气氛腐蚀试验
盐雾试验GB/T17895 天然气汽车和液化石油气汽车 词汇GB 18047 汽车用压缩天然气GB 19159
车用液化石油气GB/T 19239 液化石油气汽车专用装置的安装要求GB/T 19240 压缩天然气汽车专用
装置的安装要求QC/T 245 压缩天然气汽车专用装置技术条件QC/T 247 液化石油气汽车专用装置技
术条件QC/T746 压缩天然气汽车高压管路总成
3 术语和定义
GB/T 17895 界定的以及下列术语和定义适用于本标准。
4 要求
4.1 一般要求4.1.1CNG截止阀的质量和结构应符合QC/T245 、QC/T746 及本标准的有关规定，
并按经规定程 序批准的图样及技术文件制造。 CNG 截止阀在汽车上的安装方式应符合GB/T 19240 的规定。
LPG 截止阀的质量和结构应符合 QC/T 247及本标准的有关规定，并按经规定程序批准的图样及技术文 件制造。
LPG 截止阀在汽车上的安装方式应符合GB/T 19239的规定。
4.1.2 截止阀手轮上应有明显的开闭方向指示，有清晰的“开、关”标记，手轮的旋转范围为1.5~2圈。
4.1.3 截止阀的公称通径应从表1系列中选取。
4.1.4加工要求。
a) 截止阀体应锻压成型，截止阀体表面应平整、圆滑，不应有裂纹、折皱、夹杂物等有损阀性能 的缺陷。
b) 手轮不应有锐边、毛刺。
4.2 性能要求4.2.1启闭力矩。按5.3规定的方法进行试验，截止阀的启闭力矩应不大于7N ·m。
4.2.2额定流量。按5.4规定的方法进行试验，流量 Q 应符合生产商产品标准的规定，
且各种公称通径的CNG 截止阀的流量应不小于表2的规定数值，LPG 截止阀的流量应不小于表3的规定数值。
4.2.3 泄漏量。按5.5规定的方法进行试验，压力计显示值不应下降或泄漏量不应超过15×10-⁶N ·m³/h。
4.2.4 耐温性。按5.6规定的方法进行试验，应满足4.2.3的要求。
4.2.5 耐于热性。CNG 截止阀中与天然气接触的非金属零件，LPG 截止阀中与液化石油气接触的非金属零件，
按5.7规定的方法进行耐干热试验后，抗拉强度变化不应超过+25%,延伸率变化范围不应超过-30%～+10%。
4.2.6 耐振性。按5.8规定的方法进行试验后，紧固件应无松动，截止阀应仍能正常开闭；并应符合4.2.3中常温泄漏试验要求。
4.2.7耐压性。按5.9规定的方法进行试验，截止阀不应出现破裂、永久变形等现象。
4.2.8耐用性。按5.10规定的方法进行试验后，样件应无破损和变形；并应符合4.2.1～4.2.3的要求。
4.2.9 耐腐蚀性。
a) 按5. 11. 1 规定的方法进行试验后，并符合4.2.3常温泄漏试验的要求；
b) 对于铜或黄铜承压部件，按5.11.2规定的方法进行试验后，用25倍的放大镜检查，截止阀 上不应有裂纹产生。
4.2.10 耐臭氧性。按5.12规定的试验方法进行耐臭氧性试验后不应出现裂纹。
4.2.11 相容性。]按5.13规定的试验方法进行相容性试验后，体积变化率不得超过20%,质量下降率不得超过5%。
4.2.12 扭矩强度。按5.14规定的方法试验后，样件应无破损和变形，并符合4.2.3常温泄漏试验的要求。
4.2.13 弯矩强度。按5.15规定的方法试验后，样件应无裂纹、损坏，并符合4.2.3常温泄漏试验的要求。
5 试验方法
5.1 试验条件
5.1.1 一般规定。除非另有规定，本标准规定的试验条件为：
a)应在常温20℃±5℃范围内进行。
b)所有试验气体，均应使用干燥空气或氮气。
5.1.2 试验用仪器设备精度要求。
a) 压力计：精确度不低于2.5级，测量误差小于读数的±10%。
b) 流量计：精确度不低于2.5级，测量误差小于读数的±10%。
c)温度计：精确度为±0.5℃,最小分度不大于精度的二倍。
5.2 外观检查用目测法检查截止阀外观，检查结果应符合本标准4.1的有关规定。
5.3 启闭性试验
将截止阀装在专用装置上，从截止阀进气口充入氮气或空气到公称工作压力，以不大于7N ·m 的力矩关闭后，
浸入水中100mm～300mm 深处，观察至少1min,应无气泡出现；从水中取出，再以不大于7N ·m 的力矩开启，应能打开。
5.4 额定流量试验
在截止阀入口处安装流量计和压力计，将长度为600mm 的管子， 一端连接到截止阀出口，另一 端敞开，
管子的通径不得小于截止阀的通径。打开截止阀，按以下方法试验，从流量计上读出最大流量值。
a) CNG 截止阀入口通以压力为0.5 MPa 的清洁空气或氮气，测量时间为30s,试验过程中介 质温度变化应保证在±3℃以内。
b) LPG 截止阀入口通以压力为0.05 MPa 的试验用水，每次通水时间不得少于30s上述试验共进行6次，以求得6个流量值，取其算术平均值作为截止阀的额定流量。在各次测得的流量值中，若最大值比最小值大10%,则该最小值在算术平均值计算中应删除。
5.5 泄漏试验
试样入口经正向截止阀连接到气压源上，在试样和正向截止阀之间安装压力计或泄漏量测试 仪，向试样内充入表4或表5规定压力的试验气体，待温度达到试验温度时，关闭正向截止阀，检查1min 内压力计示值或测量1min 泄漏量。泄漏试验应分别进行外泄漏试验和内泄漏试验。
a)外泄漏试验。将试样出口密封，试样处于开启状态。
b)内泄漏试验。将试样出口打开，试样处于关闭状态。
QC/T 917-2013
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
T47
Manual valve for gas vehicle
ISSUED ON. APRIL 25, 2013
IMPLEMENTED ON. SEPTEMBER 1, 2013
Issued by. Ministry of Industry and Information Technology
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements ... 5
5 Test methods ... 8
6 Inspection rules ... 13
7 Mark, package, transportation and storage ... 14
Foreword
This Standard is drafted according to the rules given in GB/T 1.1-2009.
This Standard was proposed by and shall be under the jurisdiction of National Technical
Committee of Auto Standardization (SAC/TC 114).
Drafting organizations of this Standard. China Automotive Engineering Research Institute
Co., Ltd. and Chongqing Dinghui Automotive Fuel System Co., Ltd.
Main drafters of this Standard. Cheng Wanying, Shi Minglei, Wang Shu, Chen Chunyu,
Zhang Haihui and Xie Jiming.
Manual valve for gas vehicle
1 Scope
This Standard specifies the definitions, structure requirements, technical requirements,
test methods, inspection rules, mark, package, transportation and storage of manual valve
for gas vehicle (hereinafter referred to as shut-off valve).
This Standard is applicable to compressed gas shut-off valve for vehicle (hereinafter
referred to as CNG shut-off valve) of which the rated working pressure is not greater than
20MPa (the pressure in this Standard refers to gauge pressure), the environment
temperature is -40 ~ +85 °C and working medium conforms to the requirement of GB
18047 AND liquefied petroleum gas shut-off valve (hereinafter referred to as LPG shut-off
valve) for vehicle of which the rated working pressure is not greater than 2.2MPa, the
environment temperature is -40 ~ +85 °C and working medium conforms to the
requirement of GB 19159.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document; for
the undated documents, only the latest version (including all the amendments) are
applicable to this Standard.
GB/T 191 Packaging - Pictorial Marking for Handling of Goods
GB/T 7762 Rubber, Vulcanized or Thermoplastic - Resistance to Ozone Cracking -
Static Strain Test
GB/T 9969 General Principles for Preparation of Instructions for Use of Industrial
Products
GB/T 10125 Corrosion Tests in Artificial Atmospheres - Salt Spray Test
GB/T 17895 Natural Gas Vehicle and Liquefied Petroleum Gas Vehicle – Vocabulary
GB 18047 Compressed Natural Gas for Vehicle
GB 19159 Automotive Liquefied Petroleum Gas
GB/T 19239 Mounting Requirements of Special Equipment for Liquefied Petroleum
After it is tested according to the method in 5.8, the fastener shall not be loosened; the
shut-off valve can be opened-closed normally; and it shall conform to the requirement of
normal temperature leakage test in 4.2.3.
4.2.7 Pressure resistance
It is tested according to the method in 5.9; and the shut-off valve has no crack, permanent
deformation, etc.
4.2.8 Durability
After it is tested according to the method in 5.10, the sample piece has no damage and
deformation; and it shall conform to the requirements of 4.2.1 ~ 4.2.3.
4.2.9 Corrosion resistance
a) After it is tested according to the method in 5.11.1, it must conform to the
requirement of normal temperature leakage test in 4.2.3.
b) After the copper or brass pressing part is tested according to the method in 5.11.2, it
shall be checked by 25-times magnifying glass; and there is no crack on the shut-off
valve.
After the ozone resistance test is carried out according to the test method in 5.12, there is
no crack.
4.2.11 Compatibility
After the compatibility test is carried out according to the test method in 5.13, the volume
change rate does not exceed 20%; and the mass decrease rate does not exceed 5%.
4.2.12 Torque strength
After it is tested according to the method in 5.14, the sample piece has not damage and
deformation; and it shall conform to the requirement of normal temperature leakage test in
4.2.3.
After it is tested according to the method in 5.15, the sample piece has no crack and
damage; and it shall conform to the requirement of normal temperature leakage test in
4.2.3.
5.6 Temperature resistance test
The shut-off valve is installed on the special device; the shut-off valve is in closing state.
After the nitrogen or air is injected from the air inlet of the shut-off valve to the nominal
working pressure, it is maintained for 2h (one hour for opening and closing, respectively)
under the following conditions; the low temperature leakage test and high temperature
leakage test are carried out according to the method in 5.5.
b) It is placed in high temperature box, so that the temperature reaches 85°C±2°C.
5.7 Dry heat resistance test
After non-metal parts contacting with natural gas in CNG shut-off valve AND non-metal
part contacting with liquefied petroleum gas in LPG shut-off valve are exposed for 168h in
85°C±2°C of high temperature, check the tensile strength and elongation rate change.
5.8 Vibration resistance test
The shut-off valve is reliably installed on the clamp of sine vibration test table, so that the
shut-off valve is in a closing state. The nitrogen or air is filled from the air inlet of the
shut-off valve to the nominal working pressure; the frequency is set as 17Hz; the
respectively.
5.9 Pressure resistance test
The shut-off valve is firmly installed on the special sealed test table, so as to block the
outlet of the shut-off valve; the test liquid is slowly added to the shut-off valve from the inlet
of the shut-off valve; the pressurizing time is not less than 3min; after reaching to the
hydrostatic pressure value specified in Table 6, it is stabilized for 3min; relieve the
pressure.
The sample for the test must not be used for other tests.
Table 6 Specified value of hydrostatic pressure
Specified value of hydrostatic pressure 50MPa 6.75MPa
5.10 Durability test
5.10.1 This item test shall use new shut-off valve; the shut-off valve is installed on the
special device (see figure 1). The nitrogen or air is filled from the air inlet of the shut-off
valve to the nominal working pressure; open the shut-off valve; the pressure of the shut-off
14 Compatibility test 5.13 4.2.11 ✓ AB
15 Torque test 5.14 4.2.12 ✓ AB
16 Bending moment test 5.15 4.2.13 ✓ AB
Note. “√” represents the inspection item; ABCDEF are the sampling test piece A, test piece B, test piece
6.2 Exit-factory inspection
The manufacturer shall check the item piece-by-piece according to the regulations in
Table 8; only after it is inspected as qualified by the inspection department, can the
conformity certificate be issued and the product be delivered from the factory.
6.3 Type inspection
The type inspection samples shall be sampled from the qualified products that are newly
produced and pass the exit-factory inspection; the sampling quantity is shown in Table 8.
All items in type inspection shall be qualified. If any one item is not qualified, then the
sampling is doubled for re-inspection; and it is indicated in the inspection result.
to the items in Table 8. The newly designed product shall be subjected to product design
review according to the requirements in 4.1.
a) New design or when design parameter, process and material have significant
change;
b) When resuming production after shutdown for more than one year;
c) When it is continuously produced for three years.
7 Mark, package, transportation and storage
7.1 Mark
7.1.1 Nameplate mark
words on the nameplate shall be clear; and it must mark.
a) Product name;
b) Product model;
c) Nominal working pressure;
d) Working medium;
e) Manufacturer name;
f) Product serial number;
g) Manufacturing date.
7.1.2 Valve-body mark
valve-body.
7.2 Package
7.2.1 The pictorial markings for handling of packages shall conform to the regulations of
GB/T 191; and it must ensure that the product is not damaged during the handling
process.
7.2.2 The product conformity certificate, operation instructions and necessary packing list
shall be provided in the packing box of the product.
The following contents shall be indicated on the product conformity certificate.
a) Manufacturer’s name and trademark;
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