GB/T 12235-2025 Steel globe valves and lift check valve for petroleum;petrochemical and allied industries English, Anglais, Englisch, Inglés, えいご
Steel globe valves and lift check valve for petroleum, petrochemical and allied industries
1 Scope
This document specifies the structural types, technical requirements, materials, test methods, inspection rules, marking, and packaging, transportation and storage of steel globe valves and lift check valves for petroleum, petrochemical and allied industries.
This document is applicable to the design, production, and inspection of steel globe valves and lift check valves with flanged or welded end connections, with nominal sizes ranging from DN15 to DN600 and nominal pressures ranging from PN16 to PN400, or with nominal sizes ranging from NPS1/2 to NPS24 and nominal pressures ranging from Class150 to Class2,500, and service temperatures ranging from -46℃ to 550℃. It may serve as a reference for throttle valves.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150.3 Pressure vessels - Part 3: Design
GB/T 150.4 Pressure vessels - Part 4: Fabrication, inspection and testing, and acceptance
GB/T 152.4 Fasteners - Counterbores for hexagon bolts and nuts
GB/T 196 General purpose metric screw threads - Basic dimensions
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 5796 (all parts) Trapezoidal screw threads
GB/T 9124 (all parts) Steel pipe flanges
GB/T 12220 Industrial valves - Marking
GB/T 12221 Metal valves - Face to face, end to end, centre to face and centre to end dimensions
GB/T 12222 Multi-turn valve actuator attachments
GB/T 12224 General requirements for industrial steel valves
GB/T 26480 Valve inspection and testing
GB/T 26481 Industrial valves test for fugitive emissions
GB/T 40079 Classification system and qualification procedures for fugitive emission type testing of valves
HG/T 20592 Steel pipe flanges (PN designated)
HG/T 20615 Steel pipe flanges (Class designated)
JB/T 106 Valves marking and coating
JB/T 6440 Methods of radiographic examination for steel castings valves
JB/T 8859 Globe valve - Potential pressure life test regulation
NB/T 47013.4 Nondestructive testing of pressure equipments - Part 4: Magnetic particle testing
NB/T 47013.5 Nondestructive testing of pressure equipments - Part 5: Penetrant testing
SY/T 0599 Specification for sulfide stress cracking and stress corrosion cracking resistant metallic materials for natural gas surface facilities
3 Terms and definitions
No terms and definitions are defined in this document.
4 Structural types
4.1 The typical structural type of a straight-through globe valve with bolted bonnet is shown in Figure 1.
Contents
Foreword III
1 Scope
2 Normative references
3 Terms and definitions
4 Structural types
5 Technical requirements
5.1 Pressure-temperature ratings
5.2 Face‑to‑face dimensions
5.3 Connection ends
5.4 Valve body
5.5 Bonnet
5.6 Valve body-to-bonnet connection
5.7 Connecting studs between valve body and bonnet
5.8 Disc
5.9 Stem and stem nut
5.10 Packing and stuffing box
5.11 Valve opening and closing
5.12 Potential pressure life
5.13 Nondestructive testing
5.14 Pressure test
5.15 Fugitive emission test
6 Materials
6.1 Valve materials
6.2 Stem
6.3 Materials for sealing pairs
6.4 Requirements for corrosion resistance
6.5 Gaskets for valve body-to-bonnet connection
7 Test methods
7.1 General
7.2 Pressure test
7.3 Measurement of shell wall thickness
7.4 Measurement of stem diameter
7.5 Measurement of sealing surface hardness
7.6 Measurement of stem hardness
7.7 Analysis of material composition
7.8 Mechanical property test for valve body material
7.9 Fugitive emission test
7.10 Potential pressure life test
7.11 Inspection of valve body markings
7.12 Inspection of nameplate content
7.13 Nondestructive testing
8 Inspection rules
8.1 End-of-manufacturing inspection
8.2 Type test
9 Marking
10 Packaging, transportation and storage
11 Ordering requirements
Annex A (Informative) Order contract data sheet for steel globe valves and lift check valves for petroleum, petrochemical and allied industries
Bibliography
Figure 1 Structural diagram for a straight-through globe valve with bolted bonnet
Figure 2 Structural diagram for an angle globe valve with bolted bonnet
Figure 3 Structural diagram for a Y-pattern globe valve with bolted bonnet
Figure 4 Structural diagram for a lift check valve with bolted bonnet
Figure 5 Structural diagram for a stop-check valve with bolted bonnet
Figure 6 Structural diagram for a globe valve with pressure self-sealing bonnet
Table 1 Post-weld heat treatment for welded joints between valve body and end flanges
Table 2 Minimum wall thickness of valve body and bonnet
Table 3 Minimum inner diameter of valve body seat
Table 4 Minimum wall thickness of stem stuffing box section on bonnet
Table 5 Minimum diameter of double end studs for the valve body-to-bonnet connection
Table 6 Minimum stem diameter
Table 7 Number of potential pressure life cycles for globe valves
Table 8 Materials for parts
Table 9 Stem materials
Table 10 Weld overlay metals for sealing surfaces
Table 11 Gaskets for valve body-to-bonnet connection
Table 12 Inspection items
Table A.1 Order contract data sheet for steel globe valves and lift check valves for petroleum, petrochemical and allied industries
GB/T 12235-2025 Steel globe valves and lift check valve for petroleum;petrochemical and allied industries English, Anglais, Englisch, Inglés, えいご
Steel globe valves and lift check valve for petroleum, petrochemical and allied industries
1 Scope
This document specifies the structural types, technical requirements, materials, test methods, inspection rules, marking, and packaging, transportation and storage of steel globe valves and lift check valves for petroleum, petrochemical and allied industries.
This document is applicable to the design, production, and inspection of steel globe valves and lift check valves with flanged or welded end connections, with nominal sizes ranging from DN15 to DN600 and nominal pressures ranging from PN16 to PN400, or with nominal sizes ranging from NPS1/2 to NPS24 and nominal pressures ranging from Class150 to Class2,500, and service temperatures ranging from -46℃ to 550℃. It may serve as a reference for throttle valves.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150.3 Pressure vessels - Part 3: Design
GB/T 150.4 Pressure vessels - Part 4: Fabrication, inspection and testing, and acceptance
GB/T 152.4 Fasteners - Counterbores for hexagon bolts and nuts
GB/T 196 General purpose metric screw threads - Basic dimensions
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 5796 (all parts) Trapezoidal screw threads
GB/T 9124 (all parts) Steel pipe flanges
GB/T 12220 Industrial valves - Marking
GB/T 12221 Metal valves - Face to face, end to end, centre to face and centre to end dimensions
GB/T 12222 Multi-turn valve actuator attachments
GB/T 12224 General requirements for industrial steel valves
GB/T 26480 Valve inspection and testing
GB/T 26481 Industrial valves test for fugitive emissions
GB/T 40079 Classification system and qualification procedures for fugitive emission type testing of valves
HG/T 20592 Steel pipe flanges (PN designated)
HG/T 20615 Steel pipe flanges (Class designated)
JB/T 106 Valves marking and coating
JB/T 6440 Methods of radiographic examination for steel castings valves
JB/T 8859 Globe valve - Potential pressure life test regulation
NB/T 47013.4 Nondestructive testing of pressure equipments - Part 4: Magnetic particle testing
NB/T 47013.5 Nondestructive testing of pressure equipments - Part 5: Penetrant testing
SY/T 0599 Specification for sulfide stress cracking and stress corrosion cracking resistant metallic materials for natural gas surface facilities
3 Terms and definitions
No terms and definitions are defined in this document.
4 Structural types
4.1 The typical structural type of a straight-through globe valve with bolted bonnet is shown in Figure 1.
Contents of GB/T 12235-2025
Contents
Foreword III
1 Scope
2 Normative references
3 Terms and definitions
4 Structural types
5 Technical requirements
5.1 Pressure-temperature ratings
5.2 Face‑to‑face dimensions
5.3 Connection ends
5.4 Valve body
5.5 Bonnet
5.6 Valve body-to-bonnet connection
5.7 Connecting studs between valve body and bonnet
5.8 Disc
5.9 Stem and stem nut
5.10 Packing and stuffing box
5.11 Valve opening and closing
5.12 Potential pressure life
5.13 Nondestructive testing
5.14 Pressure test
5.15 Fugitive emission test
6 Materials
6.1 Valve materials
6.2 Stem
6.3 Materials for sealing pairs
6.4 Requirements for corrosion resistance
6.5 Gaskets for valve body-to-bonnet connection
7 Test methods
7.1 General
7.2 Pressure test
7.3 Measurement of shell wall thickness
7.4 Measurement of stem diameter
7.5 Measurement of sealing surface hardness
7.6 Measurement of stem hardness
7.7 Analysis of material composition
7.8 Mechanical property test for valve body material
7.9 Fugitive emission test
7.10 Potential pressure life test
7.11 Inspection of valve body markings
7.12 Inspection of nameplate content
7.13 Nondestructive testing
8 Inspection rules
8.1 End-of-manufacturing inspection
8.2 Type test
9 Marking
10 Packaging, transportation and storage
11 Ordering requirements
Annex A (Informative) Order contract data sheet for steel globe valves and lift check valves for petroleum, petrochemical and allied industries
Bibliography
Figure 1 Structural diagram for a straight-through globe valve with bolted bonnet
Figure 2 Structural diagram for an angle globe valve with bolted bonnet
Figure 3 Structural diagram for a Y-pattern globe valve with bolted bonnet
Figure 4 Structural diagram for a lift check valve with bolted bonnet
Figure 5 Structural diagram for a stop-check valve with bolted bonnet
Figure 6 Structural diagram for a globe valve with pressure self-sealing bonnet
Table 1 Post-weld heat treatment for welded joints between valve body and end flanges
Table 2 Minimum wall thickness of valve body and bonnet
Table 3 Minimum inner diameter of valve body seat
Table 4 Minimum wall thickness of stem stuffing box section on bonnet
Table 5 Minimum diameter of double end studs for the valve body-to-bonnet connection
Table 6 Minimum stem diameter
Table 7 Number of potential pressure life cycles for globe valves
Table 8 Materials for parts
Table 9 Stem materials
Table 10 Weld overlay metals for sealing surfaces
Table 11 Gaskets for valve body-to-bonnet connection
Table 12 Inspection items
Table A.1 Order contract data sheet for steel globe valves and lift check valves for petroleum, petrochemical and allied industries
