Dear Suhairi
There is no mandatory clause to weld GTAW only, But for below 2 " pipe welding ,you can not have back gouging due to accessibility constrain , Therefore GTAW is preferred, as we can get good full penetration and welder is comfortable. Moreover thickness is small where you can continue with single GTAW process to save the time. For better weld quality , use Pulse TIG or Up slope and down slope technique. Therefore for smaller dia pipe welding GTAW is preferred
Regards
Hegde P.B.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of tong tong
Sent: Monday, May 11, 2009 4:43 PM
To: materials-welding@googlegroups.com
Subject: [MW:2145] GTAW for pipe below 2"
Dear all members,
I need your opinion and advise..it is mandatory to weld piping 2" and below with full GTAW..if yes which spec. or code we refer..Could anyone explain to me the advantage of full GTAW on welding of piping 2" and below..Thank in advance for your cooperation
Regards
Suhairi
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