GB/T 34618-2017 English PDF

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GB/T 34618-2017: Temperature detection method for judging internal leakage faults of working valves in steam drainage steam
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34618-2017	199	Add to Cart	3 days	Temperature detection method for judging internal leakage faults of working valves in steam drainage steam	Valid

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Basic data

Standard ID: GB/T 34618-2017 (GB/T34618-2017)
Description (Translated English): Temperature detection method for judging internal leakage faults of working valves in steam drainage steam
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J16
Classification of International Standard: 23.060.01
Word Count Estimation: 10,192
Date of Issue: 2017-09-29
Date of Implementation: 2018-04-01
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34618-2017: Temperature detection method for judging internal leakage faults of working valves in steam drainage steam

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Temperature detection method for judging internal leakage faults of working valves in steam drainage steam ICS 23.060.01 J16 National Standards of People's Republic of China Steam valve internal drain valve steam leakage temperature detection method 2017-09-29 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Preface Ⅰ 1 Scope 1 2 Normative references 1 3 leakage level 1 4 test procedures 1 4.1 Test conditions 1 4.2 detection device 1 4.3 test procedures 3 4.4 test records 3 5 leakage detection judgment 3 5.1 Internal leakage qualitative judgment 3 5.2 Internal leakage quantitative judgment 4 6 special hydrophobic system valve leak detection 4 Appendix A (informative) test report 5 Appendix B (Informative) steam valve steam valve on-line temperature measurement quantitative judgment 6 Appendix C (informative) special structure hydrophobic system valve leak judgment 7

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by the China Machinery Industry Federation. This standard by the National Valve Standardization Technical Committee (SAC/TC188) centralized. This standard was drafted unit. Hunan Hongyuan High Pressure Valve Co., Ltd., Changsha University of Science and Technology, Datang Huayin Electric Power Co., Ltd., Silver Ball Festival Can Engineering Co., Ltd. The main drafters of this standard.Li Ping Ping, Deng Youcheng, Kong Huashan, Huang Zhangjun, Zhao Guoguang, Zeng Weisheng, Zhang Xiangquan, Chen Xi Jun, Li Nengbin, Liu Yang, Wu Fengling, Han Xudong. Steam valve internal drain valve steam leakage temperature detection method

1 Scope

This standard specifies the steam drainage system on-line valve (hereinafter referred to as "valve") within the leak temperature detection of leak level, test rules Process, the detection of internal leakage and special hydrophobic system valve leakage detection. This standard applies to steam power plants, steam drainage system (with steam pipes, steam headers, steam turbine cylinder steam phase Even) cut off the role of valve leakage within the fault temperature detection.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 4272 equipment and pipe insulation technology DL/T 5054 thermal power plant steam pipe design specifications

3 leakage level

Valve leakage level from small to large divided into three levels, namely micro-leakage, general leakage, serious leakage. Leakage level corresponding to the leakage See Table 1 for quantity. Table 1 steam drain on-line valve leakage level Leakage level Leakage G/(kg/h) Leakage 10≤G < 50 General leakage 50 ≤ G < 100 Serious leakage G ≥ 100

4 testing procedures

4.1 test conditions 4.1.1 unit load basically stable. Main steam parameters, reheat steam parameters, condenser vacuum basically stable. 4.1.2 The length of the hydrophobic pipe before the valve under test should be not less than 4000mm. 4.1.3 hydrophobic shut-off class valve is closed, the time interval from the last valve test should be greater than 15min. 4.1.4 hydrophobic pipe insulation material selection and structural design should be consistent with the provisions of GB/T 4272. 4.1.5 hydrophobic pipe design should be consistent with the provisions of DL/T 5054. 4.2 detection device 4.2.1 General requirements Temperature sensors, temperature transmitters, test instruments should be verified. ......

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