Re: [MW:21689] Welder Qualification

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The Fno can be the same in case of SS and CS (example Fno4 and Fno 5). The same for F no6, it can be both. The Pno range is huge and includes Pno1 and Pno 8. So your answer, general speaking was wrong.
Tack welders need to be qualified if the tack weld remains in place. If tack welds are removed, the welders need not to be qualified. This is for the ASME Code.
I know nothing about AWS  D.1.1

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Dr. Georgios Dilintas

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Dhanabal Jalachandran ---25/08/2014 11:51:02---Gent's, Kindly need your advice to clear one issue based on Welder Qualification.?

From: Dhanabal Jalachandran <dhanabal.jalachandrann@gmail.com>
To: materials-welding@googlegroups.com
Date: 25/08/2014 11:51
Subject: [MW:21685] Welder Qualification
Sent by: materials-welding@googlegroups.com

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Gent's,

Kindly need your advice to clear one issue based on Welder Qualification.? These questions were asked to me yesterday in Aramco Interview.

• If a welder is qualified with CS, can he weld SS.? ( i answered he cannot as F4 and F5 doesn't allow as per ASME Sec IX), but the interviewer told me it can be welded in GTAW with some kind of Gas i forgot the name of it. but i have gone through all the reference code i dont find any as P number and F number are essential variable.

• Welder requires tack welding qualification in ASME Sec IX or AWS D 1.1.? As per ASME Sec IX all the welders need to be qualified. As our company manufactures only Tanks and Vessels not much involved with AWS D 1.1, is there any applicable stuff where specifically welder needs to be qualified for Tank welding if he is not qualified welder.??

• If a welder is qualified with ASME Sec IX, can he weld the jobs with the code based on AWS D 1.1.? I have answered yes it's possible as the requirements need to be followed, i.e., Essential variable, Client approval as per AWS D 1.1 Clause 4.2.2.1

 
Regards
Dhanabal Jalachandran

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