Welding Procedure Qualification Record (WPQR)
WPQR stands for Welding Procedure Qualification Record. It is a document that certifies that a particular welding procedure has been tested and has met the required codes and standards. A WPQR is a necessary requirement for developing a Welding Procedure Specification (WPS).
The WPQR test involves welding a test coupon using the welding procedure specified in the WPS. The test coupon is then subjected to various tests to evaluate the quality and soundness of the weld. These tests may include visual inspection, radiography, ultrasonic testing, or mechanical testing. The results of the tests are recorded in the WPQR document.The WPQR document typically includes the following information:
- Identification of the welding procedure specification (WPS) used for the test.
- Welding process used.
- Base metals specification.
- Filler metal specification.
- Welding parameters, including amperage, voltage, travel speed, and preheat temperature.
- Results of the tests performed on the test coupon, including visual inspection, radiography, ultrasonic testing, or mechanical testing.
- Any limitations or restrictions associated with the welding procedure
The WPQR is closely related to the WPS, as it is used to verify that the welding procedure specified in the WPS produces quality welds that meet the required codes and standards. The WPQR provides evidence that the welding procedure has been tested and has passed the required tests. The WPS, on the other hand, is a document that outlines the welding procedures to be followed for a particular welding job based on the information in the WPQR.