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rkurtz61 (Mechanical) (OP)
9 Oct 08 10:46
Hello all,

I am certifying a new procedure using GTAW root and GMAW filler metal. Welder is qualifying on a 2" sch-160 coupon in 6G position with 1/8" Gap. Actual deposit values for GTAW root is .144" and .373" for GMAW filler.
Am I correct that:
WPS Groove thickness range would be GTAW .0625"-.288" and GMAW .0625"-.746" (2t for each)?
WPQ Deposit Thickness range qualified would be the same?
Thanks in advance,
metengr (Materials)
9 Oct 08 11:32
No, not exactly. Check your deposit values or pipe coupon wall thickness. According to my pipe schedule table, 2" Sch 160 = 0.343" wall.

The base metal thickness range on the WPS would be 2* coupon thickness.

The weld deposit thickness ranges would correspond to adjusted values above for the respective welding processes using 2t.
metengr (Materials)
9 Oct 08 11:34
Also, please review ASME Section IX, Article 4, QW-451.1. The information is all there for guidance.
rkurtz61 (Mechanical) (OP)
10 Oct 08 7:45
OK, I have it corrected now. Thanks.

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