No - not if impacts are required. Base metal thickness is an essential variable (QW-403.8) and a supplementary essential variable (QW-403.6). Supplementary essential variable, QW-403.6, takes precedence over QW-403.8 thus limiting the minimum qualified thickness.
Does the application for your 2nd WPS require impact testing? If not then supplementary essential variable QW-403.6 will not apply and you can write a WPS, without impact qualification, based only on QW-403.8 and QW-451.1 (i.e. 5mm < T < 22mm).
John A. Henning
Welding & Materials
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of mahammed javeed
Sent: Thursday, February 27, 2014 5:59 AM
To: materials-welding@googlegroups.com
Subject: [MW:20190] Mutiple WPS from single PQR
Gents,
I have PQR with impact test requirements and the details are below like this.
Base material thickness 11mm with impact test requirements
Process GTAW & SMAW
base metail qualified range 11mm- 22mm
GTAW process deposited weld metal qualified range 8 mm
SMAW process deposited weld metal qualified range 14mm
Now I want to make a WPS for a job of 6mm only using GTAW process, I have found a difficulty in understanding the base metal thickness range qualified.
Can I consider only weld metal deposited thickness range this process and make a WPS?
Regards
M. Javeed
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