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If youre unfamiliar with welding, those jumbles of letters probably look like a confusing bowl of alphabet soup. Heres the translation. WPS Welding Procedure Specifications. PQR Procedure Qualification Records, and. WQT / WPQ Welder Qualification Test / Welder Performance Qualifications.
What is the difference between procedure qualification and welder qualification?
So, in summary: The difference between welder and procedure qualifications are that one gives critical information on the welded joint and has no end date (PQR) whilst the welder tests give no numbers, just pass or fail and has an expiry date.
What is the difference between a PQR and a WPQR?
The quick answer is this. An AWS PQR (Procedure Qualification Record) does not include ranges of approval. These are issued to the WPS (Welding Procedure Specification). An ISO WPQR (Welding Procedure Qualification Record) includes the range of approval.
What is the difference between PQR and WPQR?
For How long is the WPS PQR certificate valid? A WPS PQR certificate is to be renewed every three year. If there is a change in any essential parameter, then the WPS PQR becomes invalid and has to be requalified.
What is the main difference between WPS and PQR?
A WPS and PQR are required documents in the fabrication process when a weld must comply with a certain standard. In simple terms, a WPS is a set of welding instructions and the PQR is a checklist to ensure those instructions were satisfactorily met. The PQR document is created first and is needed to create the WPS.
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The purpose of a WPS and PQR is to determine if a proposed weldment to be used in construction is capable of providing the required properties for the intended application. 79. A qualification in a 4G position qualifies a welder for all groove weld positions.
Related links
(PDF) Guide to understanding WPS, PQR, WPQR
This guide provides an overview of three critical documents in welding: Welding Procedure Specification (WPS), Procedure Qualification Record (PQR), and Welder
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