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Up Topic American Welding Society Services / Certifications / Does A "Weld Conditioning" Process Require Requalification?
- - By tom cooper (**) Date 07-30-2007 21:32 Edited 07-30-2007 23:42
If we had a perfectly acceptable manual tig, mig or stick WPS for mild steel, say ASTM A36,  and now a customer wanted to add a "weld conditioning" process such as the Meta-Lax system provides DURING welding (not as a PWHT), does this constitute a change to an oscillation variable (where before there was no oscillation) and must we now requalify this procedure?  
Thanks.
Parent - - By jon20013 (*****) Date 07-31-2007 01:09
Depends on Code I'd say but if ASME the simple answer is "no" requalification is not required.
Parent - - By js55 (*****) Date 07-31-2007 14:24
jon is right, there is no requirement for requal that I know of, but I would sure be tempted to run some tests anyway to see for myself if there is a difference.
If you do, please let us know the results.
Parent - - By Bill M (***) Date 08-01-2007 13:37
This inquiry has me asking a question.  We do a conditioning operation which is a GTAW (tig) dressing of weld toes on large, heavily loaded fillet reinforcements.  Do we need to qualify a procedure for the tig remelt?  (The original weld is FCAW and AWS D1.1 Code ref.)
Parent - - By Lawrence (*****) Date 08-01-2007 14:15
Bill

You bet you need a GTAW WPS if your using tig to dress your weld toes.
Parent - By js55 (*****) Date 08-01-2007 14:54
As autogenous as well, if you aren't using filler.
Parent - - By tom cooper (**) Date 08-02-2007 01:02
L & JS-
By what logic would Bill M's situation require requalification? is it because the TIG filler would create a new alloy of unknown composition when combined with the FCAW filler?  If so, why would JS55's mention of autogenous weld require a requal, if the added TIG conditioning pass added no more heat input than an additional FCAW pass? 
Parent - - By Lawrence (*****) Date 08-02-2007 01:34
Tom

Process is an essencial variable... If the processes is qualified with FCAW than GTAW just won't do.  WPS for both processes must be done.

Beside.... GTAW is not a pre-qualified process in D1.1 so any time you use that process the WPS must be qualified per section 4
Parent - By Bill M (***) Date 08-03-2007 16:49
How would I qualify a GTAW procedure without filler material?  What would the joint detail be?
Up Topic American Welding Society Services / Certifications / Does A "Weld Conditioning" Process Require Requalification?

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