GB/T 13927-2022Industrial valves - Pressure testing (English PDF)

Foreword

This document was issued on 30 December 2022 by the State Administration for Market Regulation; Standardization Administration of the PRC and takes effect on 1 July 2023.

It is a GB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

1 Scope

GB/T 13927-2022 covers the pressure testing of metal industrial valves. Clause 4 sets the conditions added when a buyer takes part — testing a stock valve without stripping paint or coating from the shell surface, witnessed tests, and the optional test items a contract may call up. Clause 5 holds the requirements: safety precautions, where the test is carried out, the test rig and the pressure measuring equipment, the state of the shell surface, the test fluid, the test pressures, which tests apply to which valve, and how long pressure is held. Clause 6 gives the three methods — the shell test, the back closure test and the sealing test — and Clause 7 the acceptance criteria for each, closing with the certificate of conformity the manufacturer hands the buyer. Annex A maps the clause structure against ISO 5208:2015 and Annex B gives equivalent nominal sizes. A valve has to hold pressure and also move, and the two duties pull against each other. A rig that clamps the ends too hard distorts the body and lets a leaking seat pass, so the procedure has to be pinned down as tightly as the pass mark. For valve manufacturers, inspection bodies and purchasers who witness tests.

This document specifies pressure test additional conditions, pressure test requirements,

test methods, test acceptance criteria for industrial valves.

This document applies to pressure testing of metal valves.

2 Normative references

This document has no normative references.

3 Terms and definitions

The following terms and definitions apply to this document.

During the test, the gauge pressure of the test fluid, which is endured by the inner

cavity of the valve.

4 Additional conditions for pressure test

If the buyer performs a pressure test on a stock valve, the stock valve may be tested,

without removing paint or coating from the shell surface.

When the order contract requires it, the test of the "optional" items in Table 1 can be

carried out.

5 Pressure test requirements

The pressure test equipment shall not exert external forces, that would affect the valve

test results. If an end pair clamping test device is used, the valve manufacturer shall be

able to ensure that the test device does not affect the test results of the sealing

performance of the valve being tested.

6 Test methods

For valves with an upper sealing structure, close the inlet and outlet of the valve.

Fill the valve shell with liquid test medium. Drain the air in the valve body cavity. Use

the valve operating mechanism, to open the valve to the fully open position. Loosen the

packing gland bolts.

7 Test acceptance criteria

The valve manufacturer shall provide the buyer with a certificate of conformity,

certifying that the valve product complies with this document.

......

Appendix A for a list of structural number comparisons between this document and ISO

5208.2015.

The technical differences between this document and ISO 5208.2015 and their reasons

are as follows.

a) DELETE the terms and definitions of "test fluid temperature", "DN/NPS",

"PN/Class"; ADD the terms and definitions of "back closure test", which appears

in the document (see 3.3);

b) CHANGE the requirements for pressure measurement equipment (see 5.4), to

meet the needs of practical applications in China;

c) ADD the fluctuation requirements of test pressure (see 5.7.4), to meet the needs

of practical applications in China;

d) ADD the test item requirements for cast iron valves (see 5.8.2), to meet the needs

of practical applications in China;

e) INTEGRATE the contents noted in Tables 1 and 3 into the Tables and clauses (see

5.8 and 6.3.2).

This document has made the following editorial changes, as compared with ISO

5208.2015.

- DELETE Note 3 in Table 3 regarding "Plug gasket material requirements".

Please note that some content in this document may be subject to patents. The publisher

of this document assumes no responsibility for identifying patents.

This document was proposed by China Machinery Industry Federation.

This document shall be under the jurisdiction of the National Valve Standardization

Technical Committee (SAC/TC 188).

The drafting organizations of this document. Hefei General Machinery Research

Institute Co., Ltd., Hefei General Mechanical and Electrical Products Testing Institute

Co., Ltd., Shenzhen Quality and Safety Inspection and Testing Institute, Chengdu

Chenggao Valve Co., Ltd., Chaoda Valve Group Co., Ltd., Zhejiang Petrochemical

Valve Co., Ltd., Jiangsu Suyan Valve Machinery Co., Ltd., Zhejiang Bethel Technology

Co., Ltd., Yuanda Valve Group Co., Ltd., Jiangsu Shentong Valve Co., Ltd., Jiangsu

Chenggong Valve Technology Co., Ltd., Anhui Tongdu Fluid Technology Co., Ltd., Kai

Ruite Valve Co., Ltd., Baoyi Group Co., Ltd., Shanghai Guanlong Valve Energy Saving

Equipment Co., Ltd., Ningbo Jackron Precision Co., Ltd., Shenjiang Valve Co., Ltd.,

Ningbo Amico Copper Valve Co., Ltd., Zhejiang Province Pump and Valve Products

Quality Inspection Center, Zhejiang Yongyuan Valve Co., Ltd., Sichuan Jingkong Valve

Manufacturing Co., Ltd., Zhejiang Linuo Fluid Control Technology Co., Ltd., Jiangnan

Valve Co., Ltd., Zhuzhou Nanfang Valve Co., Ltd., Chengde High and Medium

Pressure Valve and Pipe Fittings Group Co., Ltd., Shaanxi Aerospace Pump and Valve

Technology Group Co., Ltd., Xuanda Industrial Group Co., Ltd., Xi'an Pump and Valve

General Factory Co., Ltd., Sichuan Feiqiu (Group) Co., Ltd., Zhejiang Deka Control

Valve and Instrument Co., Ltd., Zhejiang Wonderkai Fluid Equipment Technology Co.,

Ltd., Ningbo Ri'an Valve Co., Ltd., Suzhou Antwei Valve Co., Ltd., Zhejiang Ruige

Copper Co., Ltd., Beijing Building Materials Inspection Institute Co., Ltd., Zhejiang

Hualong Jushui Technology Co., Ltd., Jitai Valve Group Co., Ltd., Zhejiang Tingyu

Fluid Equipment Co., Ltd., Jinggong Valve Group Co., Ltd., Lianggong Valve Group

Co., Ltd., Guogong Holding Group Co., Ltd., Wuxi Skaur Automatic Control

Equipment Co., Ltd., Jiangsu Shengtai Valve Co., Ltd., Zhejiang Su Ming Valve Co.,

Ltd., Zhejiang Benigo Fluid Control Co., Ltd., Zhejiang Etz Valve Technology Co., Ltd.,

Bohai Valve Group Co., Ltd., Yonglong Valve Co., Ltd., Bande Valve Technology Co.,

Ltd., Chengdu Chuanli Intelligent Fluid Equipment Co., Ltd., Shanghai Yaao Valve Co.,

Ltd., Hangzhou Chunjiang Valve Co., Ltd., Guangzhou Jiafusi Valve Manufacturing

Co., Ltd., Wuhu Jinmao Fluid Technology Co., Ltd., Henan Saifu Special Equipment

Testing Co., Ltd., Zhejiang Lishui Technology Co., Ltd., Zhejiang Fansheng Fluid

Control Co., Ltd., Zhejiang Dabolin Valve Co., Ltd., Zhejiang Odehua Technology Co.,

Ltd., Dongbao Valve Co., Ltd., Zhejiang Hengjie Copper Co., Ltd., Zhejiang Jiada Fluid

Control Co., Ltd., Zhejiang Haoji Fluid Technology Co., Ltd., Zhejiang Yuquan Fluid

Technology Co., Ltd., Jinbo Valve Group Co., Ltd.

The main drafters of this document. Wang Xiaojun, Wu Huaikun, Zhang Jianbin, Sun

Qi, Zeng Pinqi, Wang Ce, Wu Huaimin, Wang Yin, Wu Shoijing, Feng Yuzhu, Chen

Lin, Chen Shuanghe, Yan Jie, Chen Yong, Zhang Xiaozhong, Liu Fengnian, Yan

Rongjie, Ye Jijun, Zheng Xuezhen, Sun Fengwei, Li Huanyu, Gu Lidong, Peng Yulin,

Huang Zilong, Huang Jing, Wang Lijun, Lin Zhongcan, Wang Qiang, Fu Yanhe, Zhu

Yongping, Huang Jianwei, Cha Zhao, Wu Haifeng, Li Yufei, Li Zhenkun, Wang

Yongchao, Jia Zhengye, Huang Binbin, Gao Kaike, Wang Xuepeng, Zhang Peng, Yu

Jinli, Huang Bin, Yan Tao, Su Zongyao, Liu Weili, Jiang Binlong, Chen Liyi, Yu Jinxian,

Xia Xuchao, Wan Jianhua, Liu Liyan, Chai Lu, Wu Fuquan, Sun Xiong, Li Wenguang,

Huang Hui, Zheng Lin, Lin Hailin, Lin Yong, Liu Yu, Wang Gaoneng, Zhong Jiahai,

Lin Ji, Wang Jianhong, Mao Tonglian.

This standard replaces the standard previously issued as follows.

- It was first published as GB/T 13927-1992 in 1992; it was first revised in 2008.

- This is the second revision.

Industrial valves - Pressure testing

Warning. This document does not include all safety matters during the test.

Personnel using this document shall be familiar with the test procedures AND have

the responsibility to take appropriate safety and health measures and comply with

national laws and regulations, especially during high-pressure gas tests.