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GB/T 38520-2020: Marine cryogenic breakaway coupling
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GB/T 38520-2020: Marine cryogenic breakaway coupling

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Marine cryogenic breakaway coupling ICS 47.020.99 U52 National Standards of People's Republic of China Marine cryogenic pull-off valve 2020-03-06 release 2020-10-01 implementation State Administration of Market Supervision Published by the National Standardization Administration

Contents

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Classification 2 4.1 Structural Type 2 4.2 Basic parameters 2 4.3 Product Marking 3 5 Technical requirements 3 5.1 Design and Structure 3 5.2 Size 3 5.3 Appearance quality 4 5.4 Material 4 5.5 Performance 4 6 Test method 5 6.1 Size 5 6.2 Appearance quality 5 6.3 Electrical conductivity 5 6.4 Performance 6 7 Inspection rules 11 7.1 Inspection classification 11 7.2 Type inspection 11 7.3 Factory inspection 12 8 Marking, packaging, transport and storage 12 8.1 Logo 12 8.2 Packaging 13 8.3 Transport 13 8.4 Storage 13 Appendix A (informative) Typical structure of a pull-off valve 14 Reference 16

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed and managed by the National Marine Machinery Standardization Technical Committee (SAC/TC137). This standard was drafted. China Institute of Shipbuilding Industry Comprehensive Technology and Economy, China Classification Society Wuhan Specification Institute, Chengdu Andy Biosensor Co., Ltd., Zhangjiagang Furui Valve Co., Ltd., Wuhan Sanjiang Aerospace Yuanfang Technology Co., Ltd., Hangzhou Xinya Low Temperature Technology Co., Ltd. Yantai Taiyue Fluid Technology Co., Ltd. and Guangdong CSSC Military-civilian Integration Research Institute Co., Ltd. The main drafters of this standard. Wei Huaxing, Wu Shunping, Liu Tieying, Wu Yongfeng, Tu Huan, Zeng Xuebing, Wang Jianrong, Wang Jun, Yu Feng, Sun Lilong, Xu Jincheng, Li Run, Wang Ruidong, Shengwei, An Lili, Yang Peng, Zhou Jie, Shi Liping, Ma Jun, Cheng Jun, Jiang Bin. Marine cryogenic pull-off valve

1 Scope

This standard specifies the classification, technical requirements, test methods, inspection rules, and standards for marine ultra-low temperature pull-off valves (hereinafter referred to as "pull-off valves"). Storage, packaging, transportation, storage. This standard applies to the breaking of hose transmission systems used in the process of bunkering, transfer and loading and unloading of ships' liquefied natural gas (LNG). Design, manufacture and acceptance of valves.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 191 Packaging, storage and transportation icon GB/T 1184-1996 shape and position tolerances without tolerance values GB/T 1220-2007 stainless steel rod GB/T 1804-2000 Tolerances for linear and angular dimensions without general tolerances GB/T 1958 Product Geometric Technical Specification (GPS) Geometric Tolerance Detection and Verification GB/T 9124.1 Steel pipe flanges Part 1. PN series GB/T 13306 signs GB/T 13384 General technical requirements for packaging of electromechanical products GB/T 24925 low temperature valve technical conditions GB/T 30832-2014 Valve flow coefficient and flow resistance coefficient test method ISO 10497 Valve Test Fire Testing Requirements (Testing ofvalves-Firetype-testing requirements)

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Breakawaycoupling When a certain external force is applied, the safety device can be safely disconnected, and the two ends are automatically closed. 3.2 Full close time When the pull-off valve is subjected to external force, the time from the safe disconnection to automatic closing at both ends. Note. The unit of full shutdown time is seconds (s). 3.3 Breaking force The force to which the two ends of the pull-off valve are safely disconnected. Note. The unit of breaking force is kilonewtons (kN). ...