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Welding Procedure Qualification

Introduction of Welding Procedure Qualification Record: Welding Procedure Qualification Record(WPQR  for short)is one kind of evaluation of test process and result to prove the validity of the welding technology of welding drawn up or welding ability evaluation.

The purpose of Welding Procedure Qualification Record:

1Assess whether welds unit is capable of welding soldered jointwhich conform to the requirements of relevant national or trade standards and technical specifications.

2.Verify whether the welding process instructions which is formulated by the welds units is correct.

3.Provide reliable technical basis for developing formal welding process instructions or welding process card.

4.Assessment of welding ability.

Application scope of Welding Procedure Qualification Record:

1, apply to the manufacturing, installation, maintenance and repair work of boiler, pressure vessel, pressure piping, Bridges, ships, aerospace, nuclear, bearing steel and other steel equipment.

2, suitable for welding, welding rod arc welding , tungsten argon arc welding, melting polar gas shielded arc welding, submerged arc welding, plasma arc welding, electroslag welding and other welding methods.

Process assessment:

1.Preliminary Welding Procedure Specification (PWPS for short)

2.Welding and making specimen

3.test specimens and samples

4.Determinewhether the welding joint meet the using performance that the standards required.

5.make the welding procedure qualification report to assess the proposed welding process instructions.

Technology evaluation standards

reference evaluation standards:

Domestic standard of Welding Procedure Qualification Record

•SY∕T4103－1995 （amount to API 1104)

NB/T47014-2011《承压设备用焊接工艺评定》

SY∕T0452－2002《石油输气管道焊接工艺评定方法》(note: used for oil, chemical procedure qualification)

JGJ81－2002 《建筑钢结构焊接技术规程》（Note: highway bridge technology evaluation can be reference to perform）

GB50236－98 《现场设备，工业管道焊接工程施工及压力管道工艺评定》《蒸汽锅炉安全技术监察规程（1996）》

Note: lifting industry procedure qualification to borrow this standard 

European standard

ISO15614-1 Arc and gas welding of steels and arc welding of nickel and nickel alloys

ISO15614-2 Arc welding of aluminum and its alloy

ISO15614-3 Fusion welding of non-alloyed and low-alloyed cast irons

ISO15614-4 Finishing welding of aluminium castings

ISO15614-5 Arc welding of titanium, zirconium and their alloys 

ISO15614-6 Arc and gas welding of copper and its alloy

ISO15614-7 overlay welding

ISO15614-8 Welding of tubes to tube-plate joints

EN 288 or ISO 15607 - ISO 15614 series of standard

United states standard

AWS

D1.3-98 steel plate welding procedures

D1.6:1999 stainless steel welding

D1.1∕D1.1M: 2005 Structural welding Code-Steel

D1.2∕D1.2M: 2003 Structural welding Code-Aluminum

D1.5∕D1.5M: 2002 Bridge welding Code

D14.3∕D14.3M: 2005 Specification for Welding Earthmoving and Contsruction Equipment