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GB/T 20173-2025: Valves for petroleum and natural gas industries
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 20173-2025	English	1899	Add to Cart	10 days [Need to translate]	Valves for petroleum and natural gas industries
GB/T 20173-2013	English	1719	Add to Cart	10 days [Need to translate]	Petroleum and natural gas industries -- Pipeline transportation systems -- Pipeline valves
GB/T 20173-2006	English	RFQ	ASK	11 days [Need to translate]	Petroleum and natural gas industries -- Pipeline transportation systems -- Pipeline valves

GB/T 20173-2025: Valves for petroleum and natural gas industries

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ICS 75.180.10 CCSE92 National Standards of the People's Republic of China Replaces GB/T 20173-2013 Valves for the oil and gas industry Published on 2025-10-31 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 2 4.Abbreviations 5.Types and structural forms of valves 5.1 Type 5 5.2 Structural Form 5 6.Technical Requirements 15 6.1 Pressure-temperature rating 15 6.2 Valve Flow Channel Form 16 6.3 Structural length 17 6.4 End connection 17 6.5 Bolted connection 19 6.6 Operational adaptability 20 7 Design 21 7.1 Design Program 21 7.2 Design Standards and Calculations 21 7.3 Valve stem anti-flyout 21 7.4 Antistatic 22 7.5 Flow coefficient 22 7.6 Valve chamber pressure relief 22 7.7 Valve body interface 22 7.8 Transmission Chain Design 23 7.9 Hoisting 24 8.Material 24 8.1 Metallic Materials 24 8.2 Non-metallic materials 26 8.3 Bolt 27 9 Welding 27 9.1 General Rule 27 9.2 Welding materials 27 9.3 Welding Qualification 27 9.4 Corrosion-resistant alloy (CRA) surfacing 27 9.5 Weld impact test 28 9.6 Hardness 29 9.7 Visual Inspection 29 9.8 NDE 29 9.9 Repair welding 30 10 Quality Control 30 10.1 Measurement and testing equipment 30 10.2 Visual Inspection 31 10.3 Storage of Non-metallic Seals 32 10.4 Valve Assembly 32 11 Factory Acceptance Test 32 11.1 Pressure Test 32 11.2 Valve stem back seal 33 11.3 Shell hydrostatic pressure test 33 11.4 Valve seat hydrostatic pressure test 34 11.5 Pressure relief valve set pressure test 35 12 Paint 36 12.1 General Requirements 36 12.2 External coating of end connector 36 13 Mark 38 13.1 General Requirements 38 13.2 Valve size marking 39 13.3 Nameplate 40 13.4 Supplementary Requirement 41 14.Shipment Preparation 42 14.1 Emptying 42 14.2 Protection 42 14.3 Transportation Preparation 42 15 Documents 42 15.1 File saving 42 15.2 Random File 43 Appendix A (Normative) Structural Lengths and Tolerances 44 Appendix B (Normative) Design Validation Test 61 Appendix C (Normative) Supplementary Design and Manufacturing Requirements Designated by the Purchaser 70 Appendix D (Normative) Qualification of Heat Treatment Equipment 78 Appendix E (Normative) Quality Specification Level (QSL) Requirements and Supplementary Tests 80 References 88

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 20173-2013 "Pipeline Valves for Pipeline Transmission Systems in the Oil and Gas Industry" and is consistent with GB/T 20173- Compared to.2013, aside from structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the.2013 edition); b) Added terms and definitions for two-way valve seats and transition pipes (see 3.1, 3.8); c) The compliance requirement has been removed (see Chapter 3 of the.2013 edition); d) Terms and definitions such as ASME rating levels, venting, protocols, handwheels, nominal diameter, nominal pressure, and pigging have been removed (see.2013). (Pages 4.1, 4.3, 4.6, 4.12, 4.16, 4.17, and 4.23 of the.2016 edition) e) Added abbreviations such as "BSL" and "MAWP" (see Chapter 4), and removed symbols (see 5.1 of the.2013 edition); f) Increased the types and structural forms of axial flow valves (see 5.2.1); g) The requirements for pressure-temperature ratings have been changed (see 6.1, 7.2 of the.2013 edition); h) Added requirements for reduced-bore valves with a circular through-hole as the closing element (see 6.2.2); i) The dimensional requirements for face distance and end distance for all valves with nominal pressure Class 400 have been removed (see Tables 2-5 in the.2013 edition); j) The requirements for bolted connections have been changed (see 6.5, 8.6 in the.2013 edition); k) Increased the requirement for valve chamber pressure relief (see 7.6); l) The requirements for vent and discharge pipe dimensions have been changed (see Table 2, Table 7 in the.2013 edition); m) Tensile strength requirements have been added (see 8.1.6); n) The minimum Charpy V-notch impact toughness requirements for duplex and super duplex stainless steels have been increased (see Table 3); o) Requirements for non-metallic materials have been added (see 8.2); p) The requirement for corrosion-resistant alloy overlay welding has been increased (see 9.4); q) Added requirements for visual inspection of welds (see 9.7); r) Added requirements for repair welding (see 9.9); s) Increased requirements for hydrostatic testing of the shell at higher pressures (see 11.3.2); t) Added requirements for hydrostatic pressure testing of the shell with transition pipe (see 11.3.4); u) The minimum holding time requirement for the valve seat hydrostatic test has been changed (see Table 8, Table 11 in the.2013 edition); v) The acceptance criteria for the valve seat hydrostatic pressure test have been changed (see 11.4.1, 11.4.3 in the.2013 version); w) The structural length and tolerance requirements for axial flow valves have been increased (see Appendix A); x) Design validation tests have been added (see Appendix B); y) Additional design and manufacturing requirements specified by the purchaser have been added (see Appendix C). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the National Technical Committee on Standardization of Petroleum Drilling Equipment and Tools (SAC/TC96). This document was drafted by. CNPC Jianghan Machinery Research Institute Co., Ltd., Jiangsu Suyuan Valve Machinery Co., Ltd., and Fangyuan Valve Group Co., Ltd. Limited Company, China National Petroleum Corporation Changqing Oilfield Branch, Jiangsu Jiulong Valve Manufacturing Co., Ltd., Baoyi Group Co., Ltd. Company, Southwest Branch of China Petroleum Engineering & Construction Corporation, Zhejiang Lianda Valve Co., Ltd., Petroleum Industry Well Control Equipment Quality Supervision and Inspection Center, Zhejiang Rock Machinery Testing Co., Ltd., Jiangsu Tenglong Petrochemical Machinery Co., Ltd., Jiangsu Hongtai Petrochemical Machinery Co., Ltd., Special Valve Group Limited Company, Zhejiang Guanzheng Valve Co., Ltd., Chengdu Chenggao Valve Co., Ltd. The main drafters of this document are. Xiao Li, Zhu Zaisi, Zhang Rongwei, Han Zhenghai, Zhang Yushu, He Jia, Xu Jinping, Zhang Xiaozhong, Wang Changfeng, and Sun Hongxiang. Yu Liexin, Guo Chaohui, Dai Yiming, Jiang Jinwei, Wu Xianjin, Yu Ce, Hu Jian, Liu Hongcui, Wang Yin, Wang Feng, Liu Hui, Ye Tingting, Pan Chao. This document was first published in.2006, revised for the first time in.2013, and this is the second revision. Valves for the oil and gas industry

1 Scope

This document specifies the design, materials, welding, and quality control of axial flow valves, ball valves, check valves, gate valves, and plug valves used in the oil and gas industry. Requirements for manufacturing, factory acceptance testing, painting, marking, shipping preparation, and documentation. This document applies to applications in the oil and gas industry with nominal pressure ratings of Class 150, Class 300, Class 600, Class 900, Class 1500, and... The design, manufacture, and inspection of Class 2500 axial flow valves, ball valves, check valves, gate valves, and plug valves. Valves with intermediate nominal pressure are subject to [reference needed]. implement.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 150.3 Pressure Vessels - Part 3.Design GB/T 150.4 Pressure Vessels - Part 4.Manufacturing, Inspection and Acceptance GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature GB/T 229 Metallic materials Charpy impact test method GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1.Test method GB/T 231.1 Metallic materials – Brinell hardness test – Part 1.Test method GB/T 3141-1994 Industrial liquid lubricants - ISO viscosity classification GB/T 7307 55° Non-sealing pipe thread GB/T 9124.2 Steel pipe flanges - Part 2.Class series GB/T 9445 Qualification and Certification of Nondestructive Testing Personnel GB/T 12221 Structural Length of Metal Valves GB/T 12222 Connection of multi-turn valve actuators GB/T 12223 Connection of Partial Rotary Valve Actuators GB/T 12224 General requirements for steel valves GB/T 12228 Technical requirements for carbon steel forgings for general valves GB/T 12229 Technical Requirements for Carbon Steel Castings for General Valves GB/T 12716 60° Sealing Pipe Thread GB/T 13402 Large Diameter Steel Pipe Flanges GB/T 13927-2022 Pressure Testing of Industrial Valves GB/T 14906-2018 Viscosity Classification of Internal Combustion Engine Oils GB/T 19805 Skill Assessment for Welding Operators GB/T 19866 General Principles of Welding Procedure Specification and Qualification GB/T 19867 (all parts) Welding Procedure Specification GB/T 19869.1 Welding procedure qualification test for steel, nickel and nickel alloys GB/T 20801 (All Parts) Pressure Piping Specification for Industrial Piping ...