Re: [MW:13315] RE: 13196] combination of PQR with multiple process

Thanks Jhon,

 

I read yr previous post explaining the critria for combination of PQR with single process.

 

Can u please throw some light on combination of PQR's with multiples processes.

 

Suresh

 

On Mon, Dec 12, 2011 at 10:59 PM, John Henning <jhenning@deltak.com> wrote:

No.

 

QW-451 limits must be applied.  QW-200.4(b) does not apply because Essential Variable QW-404.23 for root pass is different for PQR1 than PQRs 2 and 3.  If you try and apply PQR 1, you are limited to base metal thickness of 1.5mm ~ 11mm  thus if you combine PQRs 1 , 2, and 3 your base metal thickness range is 1.5mm ~ 11mm  with maximum deposit thicknesses of 5mm for FCGTAW, 7.5mm GTAW, and 11mm for SMAW (BM  > 5mm).

 

John A. Henning

Welding & Materials

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of suresh venkat
Sent: Monday, December 12, 2011 4:45 AM
To: materials-welding@googlegroups.com
Subject: [MW:13196] combination of PQR with multiple process

 

 

Dear all,

 

want to make a WPS combining following PQR's

 

Material - SS 316L

 

PQR 1 -   full GTAW  -  T - 5.5 mm thk ( FCGTAW - 2.5mm + GTAW - 3mm)

 

PQR 2 -  GTAW + SMAW   -  T - 12.7mm thk  ( GTAW - 3.7mm + SMAW - 9mm)

 

PQR 3  -  GTAW + SMAW   -  T - 31.75mm thk  ( GTAW - 3.75mm + SMAW - 30mm)

 

PQR 1  is being used to avoid backing gas for root pass.

 

Doubt is whether the WPS is qualified base metal thk range - 1.5mm to 63.5mm as per QW 200.4a

 

 

Regards

 

Suresh

 

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