Hi,
* Code allows. Refer Interpreatation IX-77-19 of ASME Sec IX;
A welder qualfied in a given procedure and for a given max. thickness may weld on a pipe of greater wall thickness provided the thickness deposited does not excedd his qualification. However, the welder must follow a WPS that has a PQR qualification necessary to weld the full pipe thickness in production.
* Additional info, refer QW-306 of ASME Sec IX allows combination qualification for 2 or more welders in a single coupon
Regards.
From: muthu barathi <muthu_barathi@rediffmail.com>
To: materials-welding@googlegroups.com
Sent: Mon, 8 November, 2010 7:19:41 PM
Subject: Re: [MW:8147] weld thicness
No not at all. no codes permit.
if a welder qualifies as per ASME sec IX. say 1o mm thk. maximum he can weld 2T ie. 2O MM ONLY.
not changing location , it never works .
try to requalify them. always try to qualify 13mm and above with multilayers then he will be eligible to weld unlimited thk as per sec IX. same time you have to consider which code you are using as per job requirement.
On Mon, 08 Nov 2010 11:57:35 +0530 wrote
>Dear All,
I need your valuable information/comment on following case.
There is a situation where 2 welders are qualified to weld 12mm thick. Ifthe job thickness is 20 mm and dia, sayis 36", contractor divide the joint in half. First simultaneously, each willweld approx 10mm thick including root half the circum, as they are qualified in 12 mm only. Then the interchange their location and they will complete the remaining welding. Basically these 2 welders who are qualified upto 12 mm are welding 20mm thickness joint, but at any given location they are welding 10mm thickness.
Is this practice is acceptable.
Regards,
Ahmed H.
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Dear Sir,
Thanking You,
Honesty is the best Policy
With Warm Regards,
Muthu Barathi P
Mobile No:00962788269821 (Jordan)
00962775401951
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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