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Re: [MW:11982] DOT/DWT qualification

By Materials & Welding
Dear Prasu,
 

The simple answer read it carefully.

 

Essential variable: The variable which affects the properties of the weld metal is known as essential variable. Change in essential variable requires requalification of PQR.

 

Welding Technique is Non essential variable and hence will not affect the properties of the weld metal and no requalification of PQR is required.

 

The DOT/DWT technique it will not affect the properties of the weld metal and hence Requalification of PQR is not required nor the welders Requalification required if welders are qualified for suitable position and thickness range of base metal.

AS PER MY KNOWLEDGE

 

Hope the answer to the question

 

Regards

ABDUL JABBAR KHAN  

 
normally for requalification of PQR the
--- On Fri, 29/7/11, Prasu Cutie <pracuty@gmail.com> wrote:

From: Prasu Cutie <pracuty@gmail.com>
Subject: [MW:11976] DOT/DWT qualification
To: materials-welding@googlegroups.com
Date: Friday, 29 July, 2011, 4:57 PM

Dear Experts,
Is welder qualification & PQR qualification is required for DOT/DWT technique????? *(As per Sec.IX)

DOT-- Double operator technique
DWT-- Double welder technique

Awaiting for reply!!!!!!!!!

Regards
prasu
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