1 Scope
This standard specifies the rules, test methods and qualified indexes of welding procedure qualification for butt weld and fillet weld, anticorrosive overlaying process qualification, welding procedure qualification for composite metallic materials, welding procedure qualification and supplementary welding procedure qualification for heat exchange tube and tube plate, and stud arc welding procedure qualification, for pressure equipment (boiler, pressure vessel and pressure piping).
This standard is applicable to welding techniques such as oxyfuel gas welding, shielded metal arc welding, submerged arc welding, gas tungstun arc welding, gas metal arc welding, electroslag welding, plasma arc welding, friction welding, electrogas welding and stud arc welding.
This standard is not applicable to gas cylinder.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the dated versions apply to this standard. For undated references, the latest edition of the normative document (include all the amendments) is applicable to this standard.
GB 150 (all Parts) Pressure Vessels
GB 151 Tubular Heat Exchangers
GB/T 228 Metallic Materials-Tensile Testing
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method
GB/T 699 Quality Carbon Structural Steels
GB/T 700 Carbon Structural Steels
GB/T 710 Hot-rolled Quality Carbon Structural Steel Sheets and Strips
GB/T 711 Hot-rolled Quality Carbon Structural Steel Plates Sheets and Wide Strips
GB 713 Steel Plates for Boiler and Pressure Vessels
GB 912 Hot-Rolled Plates and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels
GB/T 1176 Specification for Cast Copper Alloys
GB/T 1527 Drawn Tube of Copper and Copper Alloys
GB/T 1528 Extruded Tube of Copper and Copper Alloys
GB/T 1591 High Strength Low Alloy Structural Steels
GB/T 2040 Sheet of Copper and Copper Alloy
GB/T 2054 Nickel and Nickel Alloy Sheets
GB/T 2653 Bend Test Methods on Welded Joints
GB/T 2882 Product of Geographical Indication-Fuling Mustard Tuber
GB/T 3077 Alloy Structure Steels
GB 3087 Seamless Steel Tubes for Low and Medium Pressure
GB/T 3091 Welded Steel Pipes for Low Pressure Liquid Delivery
GB/T 3274 Hot-rolled Plates and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels
GB/T 3280 Cold Rolled Stainless Steel Plate Sheet and Strip
GB/T 3375 Welding Terminology
GB 3531 Low Alloy Steel Plates for Low Temperature Pressure Vessels
GB/T 3621 Titanium and Titanium Alloy Plate and Sheet
GB/T 3624 Titanium and Titanium Alloy Seamless Tubes
GB/T 3625 Titanium and Titanium Alloy Tube for Condensers and Heat Exchangers
GB/T 3670 Coated Electrodes for Copper and Copper Alloys
GB/T 3880 (all parts) Wrought Aluminium and Aluminium Alloy Plates, Sheets and Strips for General Engineering
GB/T 4237 Hot Rolled Stainless Steel Plate Sheet and Strip
GB/T 4423 Copper and Copper-alloy Cold-drawn Rod and Bar
GB/T 4435 Nickel and Nickel Alloys Bars
GB/T 4437.1 Aluminium and Aluminium Alloy Extruded Tubes--Part 1: Seamless Tubes
GB/T 5293 Carbon Steel Electrodes and Fluxes for Submerged Arc Welding
GB 5310 Seamless Steel Tubes and Pipes for High Pressure Boiler
GB 6479 Seamless Steel Tubes For High-Pressure For Chemical Fertilizer Equipment
GB/T 6614 Titanium and Titanium Alloy Castings
GB 6653 Steel Plates and Strips for Welded Gas Cylinders
GB/T 6893 Aluminium and Aluminium Alloy Cold Drawn (Rolled) Seamless Tubes
GB/T 8163 Seamless Steel Tubes for Liquid Service
GB/T 8890 Seamless Copper Alloy Tube For Heat-Exchanger
GB/T 9460 Copper and Copper Alloy Wires and Rods
GB/T 9711.1 Petroleum and Natural Gas Industries-Steel Pipe for Pipelines-Technical Delivery Conditions-
Part 1: Pipes of Requirement Class A
GB/T 9711.2 Petroleum and Natural Gas Industries-Steel Pipe for Pipelines-Technical Delivery Conditions-
Part 2: Pipes of Requirements Class B
GB 9948 Seamless Steel Tubes for Petroleum Cracking
GB/T 11352 Carbon Steel Castings for General Engineering Purpose
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 12459 Steel Butt-welding Seamless Pipe Fittings
GB/T 12470 Low alloy steel electrodes and fluxes for submerged arc welding
GB/T 12771 Welded Stainless Steel Pipes for Liquid Delivery
GB/T 13237 Cold-Rolled Quality Carbon Structural Steel Sheets and Strips
GB 13296 Seamless Stainless Steel Tubes for Boiler and Heat Exchanger
GB/T 13401 Steel Plate Butt-Welding Pipe Fittings
GB/T 13814 Nickel and Nickel Alloy Welding Rods
GB/T 14845 Titanium Sheet for Plate Heat Exchangers
GB/T 14976 Stainless Steel Seamless Tubes for Fluid Transport
GB/T 15008 Corrosion-resisting Alloy Bars
GB/T 15620 Nickel and Nickel alloy wires and rods
GB/T 16253 Steel Castings for Pressure Purposes
GB/T 16598 Titanium and Titanium Alloy Disc and Ring
GB/T 17791 Seamless Copper Tube for Air Conditioner and Refrigeration Equipment
GB/T 17854 Stainless Steel Electrodes and Fluxes for Submerged Arc Welding
GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping
GB 19189-2011 Quenched and Tempered High Strength Steel Plates for Pressure Vessels
GB/T 20878 Stainless and Heat-resisting Steels - Designation and Chemical Composition
GB/T 21832 Austenitic - Ferritic (Duplex) Grade Stainless Steel Welded Tubes and Pipes
GB/T 21833 Austenitic - Ferritic (Duplex) Grade Stainless Steel Seamless Tubes and Pipes
GB 24511-2009 Stainless Steel Plate, Sheet and Strip for Pressure Equipment
GB/T 24593 Welded Austenitic Stainless Steel Tubes for Boiler and Heat-exchanger
NB/T 47008 Carbon Steel and Alloy Steel Forgings for Pressure Equipment
NB/T 47009 Low-alloy Steel Forgings for Low Temperature Pressure Equipment
NB/T 47010 Stainless and Heat-resisting Steel Forgings for Pressure Equipment
NB/T 47018 (all parts) Technical Permission of Welding Materials for Pressure Equipment
JB/T 4730 (all parts) Nondestructive Testing of Pressure Equipment
JB/T 4734 Aluminium Welded Vessels
JB 4741 Nickel-copper Alloy Hot Rolled Plate for Pressure Vessels
JB 4742 Nickel-copper alloy Seamless Tube and Pipe for Pressure Vessels
JB 4743 Nickel-copper Alloy Forgings for Pressure Vessels
JB/T 9625 Specification for Pressure Retaining Casting of Boiler Pipe Fittings
JB/T 9626 Specification for Boiler Forging
JB/T 10087 Specifications for steel casting of steam turbines for pressure purposes
YB/T 5264 Corrosion-resisting Alloy Forging
YB/T 5353 Hot-rolled Plates of Corrosion-resisting
YB/T 5354 Cold-rolled Sheets of Corrosion-resisting Alloy
3 Terms and Definitions
For the purpose of this Standard, those defined in GB/T 3375 and the following terms and definitions apply.
3.1
Welding procedure qualification
Assessment of test process and result carried out to verify the correctness of the proposed welding procedure of weldment.
In this Standard, the welding procedure qualification refers to the process to carry out verifying test and result assessment for preliminary welding procedure specification, in order to make the mechanical property and bending property of welded joints or the chemical compositions of overlaying meet the requirements.
3.2
Preliminary welding procedure specification (pWPS)
Document of welding procedure proposed for welding procedure qualification.
3.3
Procedure qualification report (PQR)
Report recording verifying test and inspection result and assessing proposed pWPS.
3.4
Welding procedure specification (WPS)
Document of welding procedure prepared according to qualified PQR and for product welding.
3.5
Welding working instruction (WWI)
Detailed working document for processing and operation concerning weldment manufacturing. The operation instructions applied by welder in welding, which can guarantee the reproducibility of welding quality.
3.6
Supplementary welding procedure qualification
Assessment of verifying test and result carried out for proposed welding procedure specification in order to make the supplementary characteristics of the welded joint (e.g. fillet weld thickness of heat exchange tube and tube plate) meet the requirement.
3.7
Weldment
Pressure equipment or its parts that are connected by welding or of overlaying. The weldment is composed of two parts--base metal and welded joint (or overlay).
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 General
5 Welding Procedure Qualification Factors and Classification
6 Butt Weld and Fillet Weld Welding Procedure Qualification
7 Anticorrosive Overlaying Procedure Qualification
Appendix A (Informative) Flow Diagram of Welding Procedure Specification
Appendix B (Normative) Additional Regulations for Base Metal, Filler Metal and Welding Technique
Appendix B (Normative) Additional Regulations for Base Metal, Filler Metal and Welding Technique
Appendix C (Normative) Welding Procedure Qualification for Composite Metallic Materials
Appendix D (Normative) Welding Procedure Qualification and Supplementary Welding Procedure Qualification for Heat Exchange Tube and Tube Plate
Appendix E (Normative) Stud Arc Welding Procedure Qualification
Appendix F (Informative) Recommended Format of Welding Procedure Qualification Table
Appendix G (Informative) Common English Abbreviations and Codes for Welding Procedure Qualification
