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Re: [MW:19023] Combination of two welding process with diffrent PQR

By Materials & Welding

Hi ,
Since you are going to weld tank butt joints with SMAW and SAW process , you write a WPS with combination as per QW 200.4 (b) and check whether you have SMAW PQR with min. 13 mm thk plate qualified.
Also ensure any limitations given in your client spec for combination process requirements.
Talk to your client about your proposal before taking decision .
If they not agreed and not complying ASME - IX , then you have to qualify SMAW and SAW together.
FYI, simply you cannot combine 2 different welding process for a single joint without having proof.
Regards
Saravanan
Korea

On Oct 21, 2013 5:53 PM, "mervin dio" <mervin_kid@yahoo.com> wrote:
sir,
 
Yes we are going to use this combination process and we are going to use this in tank storage the actual thicknes to be weld is 12mm plate.
 
I have a doubt because this two welding process is approve with separate WPS & PQR.
 
 MERVIN C.DIO
QC.WELDING INSPECTOR
AL SUWAIKET  SUPPORT
From: Saravanan Sornam <saravanshyla@gmail.com>
To: materials-welding@googlegroups.com
Sent: Monday, October 21, 2013 2:34 AM
Subject: Re: [MW:19012] Combination of two welding process with diffrent PQR
Hi Mervin ,

Yes you can combine these 2 Processes, provided you have to fulfil ASME-IX, QW 200.4 (b) requirements .

In your case , if you want to use SMAW on root side, the SMAW 's PQR basemetal thk should be Min. 13 mm and you should have used SMAW until full thickness of basemetal .

Also ensure you can access inside for back gouging or grinding to remove slags after you weld SMAW on root side in Ur production joint.

What is Ur actual plan, where R U going to use this combination process, what basemetal thk. Is any Pipe involved in Ur query ?

Provide all the details, if possible .

Cheers,
Saravanan,
Korea

On Mon, Oct 21, 2013 at 1:03 AM, hany alfy <hanyon_alfy@yahoo.com> wrote:
yes it can be
most of time use Smaw for root then can apply Saw or Fcaw
Regards,
HA
From: Mervin <mervin_kid@yahoo.com>; To: <materials-welding@googlegroups.com>; Subject: [MW:19000] Combination of two welding process with diffrent PQR Sent: Sun, Oct 20, 2013 2:42:12 AM
Hi to all,

Can you give me a suggestion if the two welding process can be combined or can be used in production  joint without PQR of this two  welding process.

* we have a qualified wps for smaw
And we have a wps qualified for saw may question is can we use this two wps.

Thanks

Mervin






Sent from my iPhone

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