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Technical Discussions
Krishnamohanyaramati
Futurendt, India, Joined Nov 2018, 2

Krishnamohanyaramati

Futurendt,
India,
Joined Nov 2018
2
12:55 Nov-27-2018
Plz explain about wps and pqr

Plz answer me sir

 
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William A Jensen
Other,
IHI Southwest Technologies, Inc., USA, Joined May 2017, 67

William A Jensen

Other,
IHI Southwest Technologies, Inc.,
USA,
Joined May 2017
67
19:32 Nov-27-2018
Re: Plz explain about wps and pqr
In Reply to Krishnamohanyaramati at 12:55 Nov-27-2018 (Opening).

A Welding Procedure Specification, or WPS, is a document that serves as a guide for the effective creation of a weld that meets all applicable code requirements and production standards. Think of a WPS as a recipe for welders. In the same way that a recipe for a cake details what ingredients and quantities you’ll need, a WPS contains details that are necessary to create the desired weld. This includes information such as base metal grade, filler metal classification, amperage range, shielding gas composition, and pre-heat and interpass temperatures. The idea is that if a group of welders adhere to all the details on a WPS, they should each be able to produce welds with reasonably similar mechanical properties.

To answer this question, we need to take a step back. You see, before a WPS can be drafted, a preliminary set of procedures and materials must be established. This initial procedure is used to create a series of welds which are then mechanically tested to ensure they meet all applicable requirements. The procedures for creating and testing the sample welds, as well as the final results, are documented on a Procedure Qualification Record, or PQR. If the test results are acceptable, the PQR is approved and can then serve as the foundation on which one or more WPSs are drafted. In short, a PQR serves as evidence that a given WPS can, in fact, be used to produce an acceptable weld.

https://awo.aws.org/2018/02/wps-and-pqr-demystified/

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