GB/T 20173-2025Valves for petroleum and natural gas industries (English PDF)

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).

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