Please find below the extraction of diameter limits as per QW 452.3. If you qualified with the test coupon of OD 27/8"(73mm) then you can use them for both GTAW and SMAW. But if your test specimen is 6"OD for WQT of GTAW+SMAW (its qualified for minimum 27/8"(73mm and over) . If this case, you can not use SMAW for OD 2" of production welds.
Thanks& Regards,
(Karthik)
Karthikeyan.S
QA/QC Manager
Agon Pacific Co.,Ltd.
M: +66-655-174-397, +66-892-512-282
E-mail : karthik6684@yahoo.com
On Tuesday, August 6, 2019, 08:35:11 PM GMT+7, 'Sangram' via Materials & Welding <materials-welding@googlegroups.com> wrote:
Dear Kartik sir,
Our client is opposing that; the welder is not qualified for SMAW in 2" NPS.
Regards
Sangram
Sent from my iPhone
On 06-Aug-2019, at 7:25 AM, 'Karthik' via Materials & Welding <materials-welding@googlegroups.com> wrote:
> Hi,
> Yes. He can.
> change in weld metal deposit more than he qualified only is an essential variable. Base metal thickness is not an essential variable for welder qualifications.
> (In your case for GTAW, maximum weld metal deposit thickness is restricted to the welder qualified for maximum thickness in 1" pipe)
>
> Thanks& Regards,
>
>
> (Karthik)
>
>
> Karthikeyan.S
>
> QA/QC Manager
> Agon Pacific Co.,Ltd.
> M: +66-655-174-397, +66-892-512-282
>
> E-mail : karthik6684@yahoo.com
>
>
>
>
>
>
>
> On Tuesday, August 6, 2019, 11:03:39 AM GMT+7, 'Sangram' via Materials & Welding <materials-welding@googlegroups.com> wrote:
>
>
>
>
>
> Dear experts
> Please give me your valuable feedback with code reference.
> A) One welder is qualified with dia 1" & above with GTAW(11mm)
> B) Same welder also qualified with 2 7/8 & above with GTAW + SMAW (7.5 mm Gtaw + max to be welded smaw )
> My question:
> Can this welder welded any 2" joint which thickness is more than 11mm by using GTAW+SMAW process ??
>
> Regards
> Sangram
>
> Sent from my iPhone
>
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