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RE: [MW:6489] Re: Welder qualified

By Materials & Welding

Dear Prasanna,

I completely disagree with your comments .your comment may be applicable for WPS and PQR not for Welder Qualifications.Pls.FInd below the comments .


For example..welder qualify for SMAW,as per QW353 Change in P-Number is essential..but as mentioned in QW403.18 - A change from one P number to any other P-number or to a base metal not listed in table QW/QB422,"EXCEPT AS PERMITTED IN QW-423 AND IN QW-420.2."


More over QW-420.2 has been deletd in 2009b addenda.


And in QW-423 it is permitted to weld if the welder qualify with


P.Number-1 thru P.No.15F,P.No.34,P.No.41 thru 49.he can qualify for P.No.1 thru 15F,P.No.34,P.No.41 thru 49.


So ,If WPS avilable for P.Number-4 and F.Number (in this case it is same F-Number),Position and Diameter of pipe meets the criteria he can weld the P.number-4.


Thanks & Regards,


(karthik)




Karthikeyan.S
 
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 Sat, 8/14/10, PRASANNA <prasanna5285@gmail.com> wrote:

From: PRASANNA <prasanna5285@gmail.com>
Subject: RE: [MW:6486] Re: Welder qualified
To: materials-welding@googlegroups.com
Date: Saturday, August 14, 2010, 5:09 AM

Dear All,

 

As P-Number is an essentially variable, when the welder qualified with the P-1 WPS,PQR cannot be used for the P-4 material, hence requalification if required. It is for your kind attention QW 433 describes about F-No. only not about the P number.

 

Regards,

Prasanna.R.U.

Bureau Veritas,Chennai

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Muhammed Ibrahim PK
Sent: 13 August 2010 17:26
To: materials-welding@googlegroups.com
Subject: Re: [MW:6482] Re: Welder qualified

 

Hi,

 

Yes, he can weld with backing. Refer QW 433 table.


Thanks & Regards
Muhammed Ibrahim PK


On 13 August 2010 14:46, Balaji <balaji.weldingeng@gmail.com> wrote:

Dear Venkat
                 Nope. He can't weld P-4 material using
E8028 electrodes, since F numbers are different. As per Sex IX, for
welder qualification, F numbers are essential variables.


Regards

Balaji
On Aug 12, 2:53 pm, venkat ramana <venkatgps.ram...@gmail.com> wrote:
> Dear All,
>
> Please let me know, my query is A welder was qualified with a P-1 test
> coupon using SMAW E7018 electrodes. May the welder weld P-4 material using
> E8028 electrodes with backing in production? (Assume the P-4 procedure using
> E8028 electrodes has been qualified)
>
> Thanks & Regards
> Venkat

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