Re: [MW:26982] Re: 10246] ASME IX - Welder's qualification Thickness range

Yes,

In such case welder is not qualified for unlimited thickness.

The welder should deposit minimum 13 mm thickness of weld metal in one single process 

Thanks and Regards

Lakshmankumar B

9440031459

Sent from my iPhone

On 13-Nov-2017, at 7:50 PM, Renjith <renjithtb111@gmail.com> wrote:

Thanks for your answer.

I have a doubt, 13 mm thicknes Pipe welded by GTAW+SMAW, as per code minimum 3 layes are requied so if GTAW 2 pass and SMAW also 2 pass , so he cannot weld unlimited thickness na?

On Thursday, 10 March 2011 18:07:14 UTC+3, 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 2t_GTAW  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  {Section VIII, Division 2, Article F3 has been replaced by QW-193, QW-288, QW-303.5}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 المحطة الحرارية ـ الوحدة الرابعة
المحمدية ـ المغرب

 

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