Raja is correct. If impact test is not required and PWHT is sub critical, the qualified base metal thickness: 5 - 30 mm, because your test coupon having T (not "t") 15 mm. The maximum qualified deposited weld metal thickness for GTAW process: 2t = 12mm.
T is thickness of material from test coupon, not thickness of weld deposited. It appears u use the deposited welding metal thk for GTAW to qualify base metal thickness range.
rgds
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T is thickness of material from test coupon, not thickness of weld deposited. It appears u use the deposited welding metal thk for GTAW to qualify base metal thickness range.
rgds
2011/4/24 raja sekhar <raj.inspection@gmail.com>
Hi,No, The qualified thickness range will be 5mm to 30mm (If impact test is not required).If you want to weld a 3mm thk, you have to qualify @ thk of less than or equal to 10mm.Cheers!RajOn Sat, Apr 23, 2011 at 11:33 AM, Zakaria ghrab <zakaria.ghrab@gmail.com> wrote:
Hi all,--
We have a PQR, 15 mm Thickness, welded 6mm GTAW, 9mm SMAW.
According ASME sect IX, table QW-451.1, the Qualified Thickness "T" of base metal qualified will be 1.5 mm to 30 mm and the deposit weld thikness GTAW will be 12 mm max "2xt".
Means if i have to weld pipe thick 3 mm i can't use this PQR, i'm right ?
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زكرياء غراب
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