This standard specifies the welding process assessment of butt welds and fillet welds, corrosion-resistant surfacing welding process assessment, composite metal material welding process assessment, and heat exchange tube and tube plate welding process assessment of pressure equipment (boilers, pressure vessels, pressure pipelines) and additional qualifications for welding procedures and rules, test methods and qualification indicators for stud arc welding procedure qualifications. This standard applies to gas welding, electrode arc welding, submerged arc welding, gas tungsten arc welding, gas metal arc welding, electroslag welding, plasma arc welding, friction welding, gas-electric vertical welding and stud arc Welding and other welding methods. This standard does not apply to gas cylinders.

ICS25.160.10
Industry standard of the People's Republic of China
NB/T47014-2011 (JB/T4708)
Replaces JB4708—2000
Welding procedure qualification for pressure equipment
equipment2011-07-01Release
National Energy AdministrationRelease
2011-10-01Implementation
Normative reference documents
Terms and definitions
Welding procedure qualification factors and classification
6 Welding procedure qualification for butt welds and fillet welds: Corrosion resistant cladding procedure qualification
Appendix A (Informative Appendix)
Appendix B (Normative Appendix)
Appendix C (Normative Appendix)
Appendix D (Normative Appendix)
Appendix E (Normative Appendix)
Appendix F (Informative Appendix)
Appendix G (Informative Appendix)
Preparation instructions
Welding procedure specification flow chart….||tt| |Supplementary provisions for parent metal, filler metal and welding method Welding procedure qualification for composite metal materials
NB/T47014—2011 (JB/T4708)
Welding procedure qualification for heat exchange tube and tube sheet and additional qualification for welding procedure Stud arc welding procedure qualification
Recommended format for welding procedure qualification form:
Common English abbreviations and codes for welding procedure qualification64
NB/T47014—2011 (JB/T4708)
Compared with JB4708--2000 "Welding procedure qualification for steel pressure vessels", the main changes of this standard are as follows: the scope of application is expanded from pressure vessels to boilers, pressure vessels and pressure piping; "Welding procedure specification flow chart", "Supplementary provisions for parent metal, filler metal and welding method" are added Qualification of welding procedures for composite metal materials", "Qualification of welding procedures for heat exchange tubes and tube sheets and additional qualification of welding procedures", "Qualification of stud arc welding procedures" and "Common English abbreviations and codes for welding procedure qualification" are added: welding procedure qualification of welding methods such as plasma arc welding, gas-electric vertical welding, stud arc welding and friction welding is added; welding procedure qualification of titanium, aluminum, copper and nickel materials is added; classification of filler metals (electrodes, welding wires, fluxes) and welding procedure qualification rules are added: the content of the term "welding procedure qualification" is added, and the "welding procedure instruction" is changed to "pre-welding procedure specification"; the terms "additional qualification of welding procedure", "welding operation instruction", "stud arc welding" and "deficiency" are added; Appendix A "Welding procedure qualification of stainless steel and composite steel" in JB47082000 is cancelled "; Change the writing structure of JB4708-2000 standard, and concentrate the welding process assessment factors and classification into one chapter; All kinds of welding process assessment are written according to the assessment rules, assessment methods, inspection requirements and result evaluation procedures; Chapter 4
Cancel the welding process assessment of type test pieces: Chapter 5
1) Add metal materials for boilers and pressure pipes, and divide them into categories and groups; 2) According to the changes in GB150-1998, cancel and add some pressure vessel steels and re-divide them into categories and groups; 3) Cancel the assessment rules for the grades and steel grades of welding rods, fluxes and welding wires in the filler metal category in Table 1 of JB4708-2000, and cancel the welding process assessment factors related to electroslag welding in the "Welding process assessment of butt welds and fillet welds" in JB4708-2000. Several clauses were added, and Table 6 was revised; Chapter 6
1) Added the parent material assessment rules for plasma arc welding and friction welding. Added parent material assessment rules for other welding methods; 2) Revised the two test piece thickness and weldment thickness coverage regulations; 3) Revised the tensile test judgment basis and qualified indicators; 4) Changed the bending test specimen width of tubular test pieces with an outer diameter of @≤100mm; 5) Added the bending test regulations for titanium, aluminum, copper and nickel materials; 6) Revised the regulations for the location of impact test specimens in the thickness direction; Chapter 7
1) Revised the cladding process factors for re-evaluation of cladding metal; 2) Added the cladding process factors for re-evaluation of plasma arc welding cladding; 3) Added tubular cladding test pieces and specified the sampling location; Appendix
NB/T47014-2011 (JB/T4708) In the recommended format of welding process assessment forms, Table F.3 "Heat exchange tube and tube sheet welding process card" and Table F.4 "Additional assessment report on the welding process of heat exchange tubes and tube sheets". Appendices B, C, D and E of this standard are normative appendices. Appendices A, F and G of this standard are informative appendices. This standard was proposed and coordinated by the National Technical Committee for Standardization of Boilers and Pressure Vessels (SAC/TC262). Responsible drafting units and drafters of this standard: Hefei General Machinery Research Institute
China Special Equipment Testing and Research Institute
Special Equipment Safety Supervision Bureau of the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Participating drafting units and drafters of this standard: Shanghai Boiler Factory Co., Ltd.
Harbin Boiler Factory Co., Ltd.
Lanzhou Lanshi Machinery Equipment Co., Ltd. Fushun Machinery Equipment Manufacturing Co., Ltd.
AVIC Liming Jinxi Chemical Machinery (Group) Co., Ltd. Dalian Bingshan Group Jinzhou Heavy Machinery Co., Ltd. China Petroleum and Natural Gas Pipeline Science Research Institute China Chemical The Third Construction Company of Xueyuan Engineering
Jindun Pressure Vessel Co., Ltd.
Petroleum and Natural Gas Lanzhou Engineering Quality Supervision Station Ge Zhaowen, Dou Wanbo, Fang Wunong
Shou Binan, Xie Tiejun, Yang Guoyi
Zhang Jianrong, Wang Xiaolei
Yang Peiliang
Lei Wanqing
Hu Xihai
Wang Yuwei
Sui Yongli
Xia Jiewen
Ma Xiakang
Zhang Jianjun
This standard is interpreted by the National Technical Committee for Standardization of Boilers and Pressure Vessels (SAC/TC262). The previous versions replaced by this standard are: JB4708—1992;
JB4708—2000.
1 Scope
NB/T47014—2011 (JB/T4708)
Qualification of welding procedure for pressure equipment
This standard specifies the rules, test methods and qualified indicators for the qualification of welding procedure for butt welds and fillet welds, corrosion resistant cladding, welding procedure for composite metal materials, welding procedure for heat exchange tubes and tube sheets and additional qualification of welding procedure, as well as stud arc welding procedure qualification for pressure equipment (boilers, pressure vessels, pressure pipes). This standard applies to welding methods such as gas welding, arc welding, submerged arc welding, gas tungsten arc welding, gas metal arc welding, electroslag welding, plasma arc welding, friction welding, gas-electric vertical welding and stud arc welding. This standard does not apply to gas cylinders.
2 Normative references
The following documents are indispensable for the application of this document. For all dated references, only the dated version applies to this document. For any undated referenced documents, the latest version (including all amendments) applies to this document. GB150 (all parts)
GB/T228
GB/T229
GB/T699
GB/T700
GB/T710
GB/T711
GB/T1176
GB/T1527
GB/T1528
GB/T1591
GB/T2040
GB/T2054
GB/T2653
GB/T2882
GB/T3077
GB3087
GB /T3091
GB/T3274
GB/T3280
Pressure vessel
Shell and tube heat exchanger
Tensile test for metal materials
Charpy pendulum impact test method for metal materialsHigh-quality carbon structural steel
Carbon structural steel
High-quality carbon structural steel hot-rolled steel sheet and stripHigh-quality carbon structural steel hot-rolled thick steel sheet and stripSteel plate for boiler and pressure vessel
Hot-rolled steel sheet and strip for carbon structural steel and low-alloy structural steelTechnical conditions for cast copper alloys
Copper and copper alloy drawn pipes
Copper and copper alloy extruded pipes
Low-alloy high-strength structural steel||t t||Copper and copper alloy plates
Nickel and nickel alloy plates
Bending test method for welded joints
Nickel and nickel alloy pipes
Alloy structural steel
Seamless steel pipes for low and medium pressure boilers
Welded steel pipes for low pressure fluid transportation
Carbon structural steel and low alloy structural steel hot-rolled thick steel plates and strips Stainless steel cold-rolled steel plates and strips
NB/T47014—2011（JB/T4708）
GB/T3375
GB3531
GB/T3621
GB/T3624
GB/T3625
G B/T3670 | | tt | 6614
GB6653
GB/T6893
GB/T8163
GB/T8890
GB/T9460
GB/T9711.1
GB/T9711.2
GB9948
GB/T11352
GB/T12229
GB/T12230
GB/T12459
GB/T12470||tt ||GB/T12771
GB/T13237
GB13296
GB/T13401
GB/T13814
GB/T14845
GB/ T14976
GB/T15008
GB/T15620
Welding terms
Low alloy steel plates for low temperature pressure vessels
Titanium and titanium alloy plates
Titanium and titanium alloy seamless pipes
Titanium and titanium alloy tubes for heat exchangers and condensers Copper and copper alloy welding rods
Aluminum and aluminum alloy plates and strips for general industry Hot-rolled stainless steel plates and strips
Copper and copper alloy drawing Rods
Nickel and nickel alloy rods
Aluminium and aluminium alloy hot extruded tubes Part 1: Carbon steel welding wire and flux for submerged arc welding of seamless round tubes
Non-ferrous metal for high pressure boilers Seamless steel pipe
Seamless steel pipe for high pressure fertilizer equipment Steel pipes
Titanium and titanium alloy castings
Steel plates and strips for welded gas cylinders
Aluminum and aluminum alloy drawn (rolled) seamless pipes
Non-woven seamless pipes for conveying fluids Seamless steel pipe
Copper alloy seamless pipe for heat exchanger
Copper and copper alloy welding wire
Petroleum and natural gas industry
, delivery technical conditions of conveying steel pipe
Part 1: Grade A steel pipes
Technical delivery conditions for steel pipes for transportation in the petroleum and natural gas industries Part 2: Grade B steel pipes
Seamless steel pipes for petroleum cracking
Cast carbon steel for general engineering TT valve Technical conditions for carbon steel castings for doors
Technical conditions for stainless steel castings for general valves
Steel butt-welding seamless pipe fittings
Low alloy steel welding wire and flux for submerged arc welding
Stainless steel welded steel pipes for fluid transportation
High-quality carbon structural steel cold-rolled thin steel plates and steel strips Seamless stainless steel pipes for boilers and heat exchangers Steel plate butt-welded pipe fittings
Nickel and nickel alloy welding rods||tt ||Titanium plate for plate heat exchanger
Stainless steel seamless pipe for fluid transportation
Corrosion-resistant alloy rod
Nickel and nickel alloy welding wire
GB/T16253||tt || GB/T16598
GB/T17791
GB/T17854
GB/T18984
GB19189—2011
GB/T20878
GB/ T21832
GB/T21833
GB24511—2009
GB/T24593
NB/T47008
NB/T47009
NB/T47010| |tt||NB/T47018 (all (partial)
JB/T4730 (all parts)
JB/T4734
JB4741
JB4742
JB4743
JB/T9625| |tt||JB/T9626
JB/T10087
YB/T5264
YB/T5353
YB/T5354
3Terms and Definitions|| tt||Pressure-bearing steel castings
Titanium and titanium alloy cakes and rings
NB/T47014—2 011 (JB/T4708)
Seamless copper tubes for air conditioning and refrigeration equipment
Stainless steel welding wire and flux for submerged arc welding
Seamless steel tubes for low temperature pipelines
Pressure Quenched and tempered high strength steel plate for container
Stainless steel and heat resistant steel grades and chemical compositionAustenitic ferritic duplex stainless steel welded steel pipeAustenitic ferritic duplex stainless steel seamless steel pipeStainless steel plate for pressure equipment and steel strips
Austenitic stainless steel welded steel pipes for boilers and heat exchangers Carbon steel and alloy steel forgings for pressure equipment Low alloy steel forgings for low temperature pressure equipment
Stainless steel and Heat-resistant steel forgings Ordering technical conditions for welding materials for pressure equipment Non-destructive testing of pressure equipment
Aluminum welded container
Nickel-copper alloy hot-rolled plates for pressure vessels
Nickel for pressure vessels Copper alloy seamless pipe
Nickel-copper alloy forgings for pressure vessels
Technical conditions for pressure castings for boiler pipe accessories Technical conditions for boiler forgings
Technical conditions for pressure castings for steam turbines| |tt||Corrosion-resistant alloy forgings
Corrosion-resistant alloy hot-rolled plates
Corrosion-resistant alloy cold-rolled sheets
The terms and definitions defined in GB/T 3375 and the following apply to this document. 3.1
Welding procedure qualification welding procedure qualification is the test process and result evaluation carried out to verify the correctness of the proposed welding procedure for weldments. In this standard, welding procedure qualification refers to the process of conducting verification tests and evaluating the results of the pre-welding procedure specifications in order to ensure that the mechanical properties, bending properties of the welded joint or the chemical composition of the weld overlay meet the requirements. 3.2||tt| |Preliminary welding procedure specification (pWPS)
Preliminary welding procedure specification is a welding procedure document prepared for welding procedure qualification. NB/T47014—2011 (JB/T4708)
Welding procedure qualification report (PQR) Procedure qualification record is a report that records the results of verification tests and their inspections and evaluates the proposed preliminary welding procedure specification. 3.4
welding procedure specification (WPS)
welding procedure specification is prepared based on a qualified welding procedure qualification report Welding procedure documents used for product welding. 3.5
Welding working instruction (WWI)
weldingworkinginstructionbZxz.net
A detailed work document related to the processing and operation of weldments. The work instruction used by welders during welding can ensure The reproducibility of quality during construction.
supplementary welding procedure qualification To ensure that the additional characteristics of the welded joint (such as the thickness of the fillet weld of the heat exchange tube and the tube sheet) meet the requirements, a verification test is carried out on the proposed welding procedure specification.
Weldment
Pressure-bearing equipment or its parts connected by welding or with a cladding layer. Weldments include base metal and welded joints (or cladding layers) Two parts.
Test coupon
A weldment made for testing according to a predetermined welding process. The test coupon consists of two parts: the base material and the weld joint (or weld overlay). 3.9
Post weld heat treatment (PWHT)
post weld heat treatment
Thermal process that can change the structure and properties of the welded joint or the welding residual stress. 3.10
lower transformationtemperature Temperature
The phase transformation temperature at which austenite begins to form during heating. 3.11
Upper transformation temperature
uppertransformationtemperatureThe phase transformation temperature at which austenite transformation is completed during heating. 3.12
|Facebend
The tensile side of the bending specimen is the front side of the weld. The side with the larger weld width is the front side. When the weld widths of the two sides are equal, the side with the cover layer weld completed first is the front side.
rootbend
The bending specimen has the back side of the weld as the tensile surface. 3.14
Sidebend
Bending test specimen with the tensile surface being the cross section of the weld. 10
Stud arc welding
NB/T47014-—2011 ( JB/T4708) A welding method in which the end of a metal stud (or similar part) and the surface of a workpiece are melted and fused together under the action of an electric arc and external pressure. No filler metal is used during welding, and shielding gas and flux may or may not be used. 3.16
Imperfection
In the weld joint and the parent material, the discontinuity allowed by the non-destructive testing standard. 4 General
4.1 The welding procedure qualification of pressure equipment shall comply with the requirements of the relevant standards and technical documents of boilers, pressure vessels and pressure piping products in addition to complying with the provisions of this standard.
4.2 The general process of welding procedure qualification is: according to the welding performance of metal materials, the pre-welding procedure specification is formulated in accordance with the provisions of the design documents and the manufacturing process, the welding test pieces and the test samples are welded, whether the welding joints meet the specified requirements, and the welding procedure qualification report is formed to evaluate the pre-welding procedure specification. 4.3 The welding procedure qualification shall be carried out in the unit. The equipment and instruments used for welding procedure qualification shall be in normal working condition, the metal materials and welding materials shall meet the corresponding standards, and the test pieces shall be welded by the skilled welding personnel of the unit using the equipment of the unit. 4.4 The qualified welding process refers to the important factors and supplementary factors in the general welding process qualification factors and special welding process qualification factors listed in the qualified welding process qualification report. 4.5 See Appendix A for the welding process specification procedure. 5 Welding process qualification factors and classification
5.1 General welding process qualification factors and classification of various welding methods5.1.1 Welding methods and classification
The categories of welding methods are: gas welding, arc welding, submerged arc welding, gas tungsten arc welding, gas metal arc welding (including flux-cored arc welding), electroslag welding, plasma arc welding, friction welding, gas-electric vertical welding and stud arc welding. 5.1.2 Metal materials and classification
Based on the chemical composition, mechanical properties and welding properties of metal materials, the parent materials for welded pressure equipment are classified and grouped as shown in Table 1. Table 1 Classification and grouping of parent materials for welded pressure equipment Parent material
Fe-1-1
Brand, grade, model
GB/T699，GB/T711，GB3087，GB6479,GB/T8163，GB9948,GB/T12459
GB/T710，GB/T711，GB/T13237
GB/T699,GB/T710,GB/T711GB3087,GB6479,GB/T8163,GB9948，GB/T12459，GB/T13237，NB/T47008GB5310，GB/T12459
GB/T700
GB/T700，GB/T3091
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