Does a prequalified WPS require a PQR?

Does a prequalified WPS require a PQR?

A prequalified WPS does not need a Procedure Qualification Record because it is a procedure that has been identified by AWS as having a prooven satisfactory performance.

How do you qualify for WPS?

Specific codes and/or engineering societies are often the driving force behind the development of a company’s WPS. A WPS is supported by a Procedure Qualification Record (PQR or WPQR). A PQR is a record of a test weld performed and tested (more rigorously) to ensure that the procedure will produce a good weld.

What does not require a PQR?

The PQR must include all essential variable (such as P number, F number, A number, PWHT) and supplementary essential variables (such as Group Number). The nonessential variables are not code requirements for PQR.

What comes first PQR and WPS?

In simple terms: The WPS is written from the PQR. A PQR comes before a WPS.

What is pre qualified WPS in AWS D1 1?

1 Prequalified Welding Procedure Specifications. Pre-written welding procedures in accordance with clause 3 of AWS D1. SMAW, FCAW, and GMAW (Spray-transfer) welding processes are prequalified on most common structural steel materials, including ASTM A36, ASTM A992, A572 Grade 50 and many more. …

What is Pqr welding?

A Procedure Qualification Record (PQR) is the record of the actual weld test parameters used.It is the founding document as far as procedures are concerned and is used to produce welding procedure specification sheets (WPS) for production welds. It is company dependent and never expires.

How do you prepare WPS and PQR?

Basic Information. Most WPS will be backed on a PQR (Procedure Qualification Record) and this information should always be stated in the WPS. All you need to do is reference the PQR number which will allow any reader of your WPS to trace back to the original qualifying document.

Why PQR is required?

This initial procedure is used to create a series of welds which are then mechanically tested to ensure they meet all applicable requirements. In short, a PQR serves as evidence that a given WPS can, in fact, be used to produce an acceptable weld.

What is difference between PQR and WPS?

WPS is welding procedure specification whereas PQR is procedure specification record. These are some of the significant and mandatory documents especially to ensure that the welds comply with the rules.

When to use a WPS with a PQR?

If a WPS is used in conjunction with an approved procedure qualification record (PQR) then the ranges stated should be in accordance with the approval ranges permitted by the PQR. However careful consideration should be given to the ranges specified to ensure they are achievable, so that these ranges represent good welding practice.

Do you need to record A PQR during welding?

When the WPS provided, then a test sample must be prepared and welded. All welding variable must be recorded during the welding. Please note in WPS you have the range but you will not have a range in the PQR, and you need to record a single value for each specified variable.

What is the purpose of qualifying a WPS?

The purpose of qualifying a WPS is that to indicate joining process proposed for production welding has required mechanical property. The WPS is written by knowledgeable person but needs to be tested to ensure the produced weld based on WPS has required mechanical property. When the WPS provided, then a test sample must be prepared and welded.

What do you need to know about PQR documentation?

PQR documentation is essentially a preliminary list of procedures and materials used to create a series of welds and the final result of those welds. This may include informational and operational material on specific tests and inspection procedures such as guided bend testing and tensile strength tests.