1 Scope
This document specifies the structural type, technical requirements, materials, test methods, inspection rules, markings, protection, packaging, storage and transportation of steel ball valves of elastic sealing pair for petroleum, petrochemical and allied industries.
This document is applicable to:
——Ball valves at flange connecting end and welded connecting end, with nominal pressure of PN16-PN100, nominal dimension of DN15-DN600, pressure class of Class150-Class600 and nominal dimension of NPS½-NPS 24;
——Ball valves at threaded connecting end and socket welding connecting end, with nominal pressure of PN16-PN140, nominal dimension of DN8-DN50, pressure class of Class150-Class800 and nominal dimension NPS¼ -NPS2;
——-Ball valves with full diameter and reduced diameter. Ball valves with floating ball structure and fixed ball structure;
——Applicable temperature: -46°C to 260°C.
Ball valves with metal and ceramic material sealing pair can be implemented by reference to this document.
2 Normative references
The following 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 150.4 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 197 General purpose metric screw threads—Tolerances
GB/T 228.1 Metallic materials - Tensile testing—Part 1: Method of test at room temperature
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2: Taper internal and external threads
GB/T 9124 (All parts) Steel pipe flanges
GB/T 12220 Industrial valves—Marking
GB/T 12221 Metal calves—Face to face, end to end, center to face and center to end dimensions
GB/T 12223 Part-turn valve actuator attachments
GB/T 12224 General requirements for industrial steel valves
GB/T 12228 General purpose industrial valves—Specification of carbon steel forgings
GB/T 12229 General purpose industrial valves—Specification of carbon steel castings
GB/T 12230 General purpose industrial valves—Specification of stainless steel castings
GB/T 20801.5 Pressure piping code—Industrial piping—Part 5: Inspection and testing
GB/T 26479 Fire test for soft-seated quarter-turn valves
GB/T 26480 Valve inspection and testing
GB/T 35741 Specification of stainless steel forgings for industrial valves
JB/T 106 Valves marking and paint
SY/T 7024 Technical code for field hardness test of metal materials used in highly hydrogen sulfide gas field
3 Terms and definitions
For the purposes of this document, the following term and definition apply.
3.1
conducting electrostatic design
structure to ensure continuous electrostatic conduction among valve body, ball and stem
3.2
fire resisting design
structure that can still maintain certain sealing performance requirements when the elastic sealing material is damaged by fire
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Structural types
5 Technical requirements
5.1 Pressure-temperature rating
5.2 Structure length
5.3 Connecting end
5.4 Dimension of ball runner
5.5 Valve body
5.6 Connection between valve bodies
5.7 Anti-dropping structure of stem
5.8 Stem structure
5.9 Ball
5.10 Packing gland and bolts
5.11 Conducting electrostatic design
5.12 Operating mechanism
5.13 Fire resisting design
5.14 Non-destructive test
5.15 Pressure test of ball valve
5.16 Ordering requirements
6 Materials
6.1 Ball valve housing
6.2 Ball and valve seat
6.3 Stem
6.4 Connecting studs and bolts between valve bodies
6.5 Connecting bolts between packing gland and bonnet
6.6 Sealing materials
6.7 Packing sleeve and packing plate
6.8 Plug screw
6.9 Handle or handwheel
6.10 Hydrogen sulfide resistance
7 Test methods and inspection rules
7.1 Test methods
7.2 Inspection rules
8 Marking
8.1 Marking contents
8.2 Marking on valve body
8.3 Markings on the plate
8.4 Other markings
9 Protection, packaging, storage and transportation
Annex A (informative) Order contract data sheet
1 Scope
This document specifies the structural type, technical requirements, materials, test methods, inspection rules, markings, protection, packaging, storage and transportation of steel ball valves of elastic sealing pair for petroleum, petrochemical and allied industries.
This document is applicable to:
——Ball valves at flange connecting end and welded connecting end, with nominal pressure of PN16-PN100, nominal dimension of DN15-DN600, pressure class of Class150-Class600 and nominal dimension of NPS½-NPS 24;
——Ball valves at threaded connecting end and socket welding connecting end, with nominal pressure of PN16-PN140, nominal dimension of DN8-DN50, pressure class of Class150-Class800 and nominal dimension NPS¼ -NPS2;
——-Ball valves with full diameter and reduced diameter. Ball valves with floating ball structure and fixed ball structure;
——Applicable temperature: -46°C to 260°C.
Ball valves with metal and ceramic material sealing pair can be implemented by reference to this document.
2 Normative references
The following 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 150.4 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 197 General purpose metric screw threads—Tolerances
GB/T 228.1 Metallic materials - Tensile testing—Part 1: Method of test at room temperature
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2: Taper internal and external threads
GB/T 9124 (All parts) Steel pipe flanges
GB/T 12220 Industrial valves—Marking
GB/T 12221 Metal calves—Face to face, end to end, center to face and center to end dimensions
GB/T 12223 Part-turn valve actuator attachments
GB/T 12224 General requirements for industrial steel valves
GB/T 12228 General purpose industrial valves—Specification of carbon steel forgings
GB/T 12229 General purpose industrial valves—Specification of carbon steel castings
GB/T 12230 General purpose industrial valves—Specification of stainless steel castings
GB/T 20801.5 Pressure piping code—Industrial piping—Part 5: Inspection and testing
GB/T 26479 Fire test for soft-seated quarter-turn valves
GB/T 26480 Valve inspection and testing
GB/T 35741 Specification of stainless steel forgings for industrial valves
JB/T 106 Valves marking and paint
SY/T 7024 Technical code for field hardness test of metal materials used in highly hydrogen sulfide gas field
3 Terms and definitions
For the purposes of this document, the following term and definition apply.
3.1
conducting electrostatic design
structure to ensure continuous electrostatic conduction among valve body, ball and stem
3.2
fire resisting design
structure that can still maintain certain sealing performance requirements when the elastic sealing material is damaged by fire
Contents of GB/T 12237-2021
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Structural types
5 Technical requirements
5.1 Pressure-temperature rating
5.2 Structure length
5.3 Connecting end
5.4 Dimension of ball runner
5.5 Valve body
5.6 Connection between valve bodies
5.7 Anti-dropping structure of stem
5.8 Stem structure
5.9 Ball
5.10 Packing gland and bolts
5.11 Conducting electrostatic design
5.12 Operating mechanism
5.13 Fire resisting design
5.14 Non-destructive test
5.15 Pressure test of ball valve
5.16 Ordering requirements
6 Materials
6.1 Ball valve housing
6.2 Ball and valve seat
6.3 Stem
6.4 Connecting studs and bolts between valve bodies
6.5 Connecting bolts between packing gland and bonnet
6.6 Sealing materials
6.7 Packing sleeve and packing plate
6.8 Plug screw
6.9 Handle or handwheel
6.10 Hydrogen sulfide resistance
7 Test methods and inspection rules
7.1 Test methods
7.2 Inspection rules
8 Marking
8.1 Marking contents
8.2 Marking on valve body
8.3 Markings on the plate
8.4 Other markings
9 Protection, packaging, storage and transportation
Annex A (informative) Order contract data sheet
