Lakshman kumar.B
Project manager.
9440031459
From: Shivtej Shete
Sent: 27-05-2016 10:53
To: Materials & Welding
Subject: [MW:24891] Re: 10246] ASME IX - Welder's qualification Thicknessrange
On Thursday, March 10, 2011 at 8:37:14 PM UTC+5:30, John Henning wrote:
You are correct, provided only a single welding process is used to weld the coupon. The requirement is for the weld process to deposit a thickness of ½" (13mm) or greater.
If you welding pipe or tube, you must also consider the groove weld diameter limits table, QW-452.3.
As an example, I often want to qualify a welder to perform pipe welding with a GTAW root and hot pass followed by FCAW to fill the joint. Therefore, a 13mm coupon will not be sufficient to get unlimited thickness qualification for the FCAW process. As I am satisfied with a minimum 2-7/8" (73mm) diameter qualification, I will use either a 6 inch – Schedule 160 or schedule XX coupon and specify that there be a minimum of ½ in. (13mm) of joint left unwelded after completion of the GTAW portion. The welder will be qualified for 2tGTAW and unlimited for FCAW.
Note that corrosion resistant overlay, hard facing overlay, and temper bead welding have their own qualification rules. Tube-to-tubesheet welding will be qualified unless demonstration or mock-up testing is required per QW-193 by Code section or customer specification. {Section VIII, Division 2, Article F3 has been replaced by QW-193, QW-288, QW-303.5}
Let me know if you have additional questions.
John
From: material...@
googlegroups.com [mailto:mate...@googlegroups.com] On Behalf Of Zakaria ghrab
Sent: Wednesday, March 09, 2011 11:14 AM
To: material...@googlegroups.com
Subject: [MW:10246] ASME IX - Welder's qualification Thickness range
Hi all,
As per ASME sect IX table QW-452-1(b), for welder's qualified in test coupon thickness greater or equal than 13 mm, he's will be qualified to wed thickness " Maximum to be welded"
May my interpretation is true ??
In this case, Can i qualify all welder's in 13 mm thickness, he will be qualified for all thick ( PWHT is not essential variable for welders) and cover all thickness range ?
Regards
--زكرياء غراب
GHRAB Zakaria
مسؤول عن الجودة
QA/QC SENAD
مشروع المØطة الØرارية Ù€ الوØدة الرابعة
المØمدية Ù€ المغرب
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