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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