It certainly is permissible to write a properly supported WPS with multiple conditions. However, one starts to get into a booking keeping nightmare if one is not very, very careful. You must provide clear instructions on the applicability so you don’t get into deep trouble due to misapplication.
John A. Henning
Welding & Materials
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ahmed Husain
Sent: Tuesday, June 25, 2013 11:18 AM
To: materials-welding@googlegroups.com
Subject: Fw: [MW:18038] WPS with multiple PQR
It means, It is not correct to prepare a WPS supported my multiple PQR, with two condition, i.e. with PWHT and without PWHT. Also, instead of using two WPS on one joint, a new WPS is required to be prepared combining both WPS.
Please correct me if I am wrong.
Regards,
A, Husain
----- Forwarded Message -----
From: joseph mbé <mbejoseph@yahoo.fr>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Sent: Monday, June 24, 2013 11:06 AM
Subject: Re: [MW:18018] WPS with multiple PQR
see my answer here below in red
Joseph Faustin Mbe
QA/QC Engineer
TEL CMR (00237) 33129846
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Yesterday is the pass, tomorrow is the future; and today? Today is the present, the gift: Enjoy it!
De : Ahmed Husain <ahmraha@yahoo.com>
À : "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Envoyé le : Dimanche 23 juin 2013 17h00
Objet : [MW:18005] WPS with multiple PQR
Dear All,
Followings are brief details of five PQRs.
PQR No. Process Base metal B.M. Thick B.M. RANGE PWHT Impact
#1 SMAW P1Gr3 to P1Gr3 0.24 Thk 1.6 -12 N/A
#2 SMAW P1GR3-P1GR2 0.24 Thk 1.6 -12 N/A YES (-51 F)
#3 SMAW P1Gr3 to P1Gr3 1.5 THK 16 - 200 1150/10 HRS YES (-51 F)
#4 SMAW P1GR3-P1GR2 1.5 THK 16 - 200 1150/08 HRS ES (-60 F)
#5 SMAW P1Gr3 to P1Gr3 1.75 THK 16 - 200 N/A YES (-51 F)
Based on above PQRs,
1. Is it acceptable to prepare a single WPS with two welding condition ( with and without PWHT), with notes stating thickness limits for both conditions. (why not 2 different wps )
2. If yes, what would be thickness range for welding with & without PWHT. (PWHT is an EV so, not possible for my knowledge)
3. With reference to ASME IX- QW-200.4 Combination of Welding Procedures,: If a company has two WPS, one in GTAW process and second in SMAW process, is it acceptable to apply individually both WPS on single joint? Or new WPS will be required combing both WPS? (Are you talking about 02 PQR or 2 WPS? if 02 PQR, Yes it's possible to use the combination of 02 PQR qualified separately but, in the limite of tickness range for each process).
Your valuable feedback will be highly appreciated.
Regards,
A.Husain
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