Welding Procedure Qualification Record， WPQR

The test procedure and the results are evaluated to verify the correctness of the weld process or the welder qualification.

Application of welding process evaluation

1, for the boiler, pressure vessels, pressure pipes, bridges, ships, aerospace, nuclear energy and steel structure and other steel equipment manufacturing, installation, maintenance work;

2, suitable for gas welding, electrode arc welding, TIG welding, melting gas welding, submerged arc welding, plasma arc welding, electroslag welding, stud welding, laser welding, pressure welding and other welding methods.

Assessment process

1, pre-welding process guide (Preliminary Welding Procedure Specification, referred to as PWPS);

2, welding test pieces and preparation of samples;

3, test specimens and samples;

4, determine whether the welding joints meet the performance requirements required by the standard;

5, the proposed welding process assessment report on the preparation of the welding process to assess the book.

Process evaluation routine testing

external assessment

Non-destructive testing

Stretch test

Bending test

Impact test

Hardness Testing

Low magnification test

Surface crack detection

Process evaluation reference standard

European standard:

Process evaluation of pre - production welding tests

EN ISO15614-1 steel arc welding and gas welding / nickel and nickel alloy arc welding

EN ISO15614-2 Arc welding of aluminum and aluminum alloys

EN ISO15614-3 cast iron arc

EN ISO15614-4 cast aluminum repair welding

EN ISO15614-5 Arc welding of titanium and titanium alloys; Arc welding of zirconium and zirconium alloys

EN ISO15614-6 Arc welding of copper and copper alloys

EN ISO15614-7 surfacing

EN ISO15614-8 welded joints for pipe joints and tubesheets

EN ISO 15614-11 Electron and laser beam welding

EN ISO 15614-12 spot welding, seam welding and projection welding

EN ISO 15614-13 resistance butt welding and flash welding

EN ISO 15614-14 laser, arc and composite welding of steel, nickel and nickel alloys

Welding of welded joints. Welding of welded joints

Welding of welded steel bars - Non - load welded joints

American standard:

AWS

Code for welding of thin plate steel structure

Welding of stainless steel

Code for welding of steel structures D1.1 / D1.1M: 2005

Rules for Welding of Aluminum Structures for D1.2 / D1.2M: 2003

D1.5 / D1.5M: 2002 Bridge Welding

D14.3 / D14.3M: 2005 Rules for welding of lifting machinery