Thursday, October 28, 2010

Re: [MW:7913] WQT- Number of Welders Issue

Dear Mr. K.Babu,
 
Thank you very much for sharing a useful article.In my opinion, a welder has to weld the entire circumference during WQT.Then only we can asses their skill to weld from both sides and all positions.Unfortunately I couldn't find such a clause in ASME BPV SEC IX.
 
Dear All,
 
I have reviewed ASME BPV SEC IX ,2010 edition QW 306 and QW 310 and I couldn't find that a welder has to weld the entire circumference of the test coupon.Seniors ,Can I qualify welders in half portion of pipe if they are crossing the minimum requirement of 6"(150mm) weld length.?Anybody having ASME interpretation on this subject?Please advise me.
 
 
 
Regards,
 
 
Limesh
 
 

 
On Thu, Oct 28, 2010 at 7:49 AM, Kathalingam Babu <kathalingam.qaqc@ppl.com.sg> wrote:
Hi
 
Pls find the attached , might be useful.
 
Regards
 
K.Babu
Singapore
 
----- Original Message -----
From: Karthik
Sent: Thursday, October 28, 2010 9:05 AM
Subject: Re: [MW:7880] WQT- Number of Welders Issue

Hi,

Code doesnt restrict to use more welders in single test coupon if he weld the minimum length of 150mm.




Thanks & regards,


(karthik)


Karthikeyan.S
QA/QC Manager
Getabec Energy Co.,Ltd.
379,Moo6,Soi8,Nikhomphatana,
Rayong-21180,
Thailand.
Phone: 0066 38 897035-8 (Off)
Fax: 0066 38 897034
Hand Phone: 0066 892512282


--- On Wed, 10/27/10, Kathalingam Babu <kathalingam.qaqc@ppl.com.sg> wrote:

From: Kathalingam Babu <kathalingam.qaqc@ppl.com.sg>
Subject: Re: [MW:7873] WQT- Number of Welders Issue
To: materials-welding@googlegroups.com
Date: Wednesday, October 27, 2010, 6:06 PM

Dear Raghuram,
 
My understanding as per QW 306 is, You can qualify 2 or more welders in single test coupon, but not allowed to weld each haf as stated by Limesh.
 
Regards
 
K.Babu
Singapore
 
----- Original Message -----
Sent: Wednesday, October 27, 2010 6:59 PM
Subject: RE: [MW:7871] WQT- Number of Welders Issue

QW306: "Two or more welders or welding operators, each using the same or a different welding process, may be qualified in combination in a single test coupon". However all essential variable for performance qualification will apply individually . No change in 2010 edition in this regard.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kathalingam Babu
Sent: Wednesday, October 27, 2010 3:58 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:7869] WQT- Number of Welders Issue

 

Limesh

 

I understand that, it has not been allowed to weld by 2 welders on single pipe as pr ASME latest revision.

 

I don't have latest edition, but you can find recent article in Welding Journal (Aug 2010) discuss about this issue.

 

Regards

 

K.Babu

Singapore

 

----- Original Message -----

From: limesh M

Sent: Wednesday, October 27, 2010 6:12 PM

Subject: [MW:7868] WQT- Number of Welders Issue

 

Dear All,

Design Code – ASME B31.3

Welding Code – ASME BPV SEC IX

Can I use multiple welders in a single test coupon for WQT.ie, two welders one half with two process (6 o'clock to 12 o'clock) and other half (6 o'clock to 12 o'clock) another two welder with two process(Suppose all welders are crossing the minimum 6"(150 mm) length)?

Is there any clause insisting that one welder has to weld the entire pipe circumference irrespective of diameter?

 Regards,

 Limesh


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