Re: [MW:19051] Combination of two welding process with different PQR

As pet below case the range should be GTAW - 10 mm & SMAW - 18 mm



Regards, 

Vidhyapathi 

On 23 Oct, 2013, at 12:20 am, Ghaith NDE <ghaithnde@yahoo.com> wrote:

Dear
I have piece coupon ( PQR) as thickness 14mm the welding processes are  gtaw for root pass and smaw 7018 for others the root pass almost 5mm and the remaining was 9mm now in the present time I want to use smaw with other processes but smaw for root pass  9mm and  as indicated in  QW.451 .1 it is correct or not  because the qualified T is 2t an so 18mm it is greater than 13mm

On Tuesday, October 22, 2013 6:42 PM, Ghaith NDE <ghaithnde@yahoo.com> wrote:

Dear
what about flow line ??
regards

On Tuesday, October 22, 2013 6:34 PM, Ghaith NDE <ghaithnde@yahoo.com> wrote:

Dear

many thanks about prompt reply  another question about can I combined SMAW , GTAW , GMAW , SAW or others prosess together in one PQR or single joint   because and as it is mentioned below typically we has combined GMAW ( root )  AND FCAW OR GTAW ( root) and SMAW and so what about others process combination what about smaw and saw what about gmaw and gtaw  .

another thing  I have flow line API 1104 has welded by GMAW automatic machine but when I want  to repair the defects during welding can I make that by using smaw or GTAW  but manual with taking into consideration the  SMAW and  GTAW qualified and supported with PQR API 1104 

regards

On Tuesday, October 22, 2013 5:17 PM, John Henning <jhenning@deltak.com> wrote:

Yes you may – be careful with using the correct base metal thickness for your combined WPS,  this has been extensively discussed previously on this group.  Of course you have to have the appropriate P-Numbers etc.

 

QW-200.4 discusses this issue.  My mistake below – should be QW-200.4(a)  (there is no subsection QW-220).

 

John A. Henning

Welding & Materials

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ghaith NDE
Sent: Monday, October 21, 2013 12:47 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:19026] Combination of two welding process with different PQR

 

dear experts
I have two PQR both of them according to section ix  the first as smaw and the secod PQR as gtaw  my inquiring can I combined them in single production joint  .
 in addition I have gmaw PQR can I  combined with smaw or gtaw or both .

 

On Monday, October 21, 2013 5:23 PM, John Henning <jhenning@deltak.com> wrote:

The last statement, highlighted in red, is horse hockey.  If you can complete a joint with a process, you can complete a portion of the joint with a process.  Combining processes from different WPSs in a joint is an efficiency decision.  Typical is doing one PQR with a coupon with GTAW only and a second PQR coupon with another process, typically a fill process, (SAW, GMAW, FCAW, SMAW) – there is no practical reason why these two cannot be combined.

 

Per Section IX, the WPSs do not even have to be combined into a single PQR -  See QW-220.4 Combining of Welding Procedures, subsection (a) :  " More than one WPS having different essential, supplementary essential, or nonessential variables may be used in a single production joint.  Each WPS may include one or a combination of processes, filler metals, or other variables.  . . ."

 

Don't confuse some customer's requirements with Code. 

 

John A. Henning

Welding & Materials

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Saravanan Sornam
Sent: Monday, October 21, 2013 5:28 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:19023] Combination of two welding process with diffrent PQR

 

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 <sa