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WPS based on multiple PQR as per ASME IX

WPS based on multiple PQR as per ASME IX

Postby zirsald » Fri Nov 08, 2013 2:21 pm

Dear forum members,
Could you please let me know if I can use combination of two different PQR (PQR1 and PQR2) in order to prepare a single WPS as below:
PQR1: GTAW on 4" pipe with thickness 6 mm,
PQR2: SMAW on plate with thickness 15 mm,
WPS: GTAW+SMAW on pipe 10" with thickness 12.7 mm.
Thanks
zirsald
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Re: WPS based on multiple PQR as per ASME IX

Postby mohd » Sat Nov 09, 2013 9:22 am

dear one,

please provide base metal and consumable details of each PQR.

regards
mohd.
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Re: WPS based on multiple PQR as per ASME IX

Postby zirsald » Sat Nov 09, 2013 10:38 am

Dear Mohd,
The reason that I have not mentioned the base and filler metals details is that I believe they don't affect the evaluation of such a situation taking into consideration that regarding them the essential variables of ASME IX apply. Nevertheless, please be informed that the base and filler metals details are as described below:
PQR1 (butt weld): GTAW using ER70S-6 on 4" pipe ASTM A 106 Gr B with thickness 6 mm,
PQR2 (butt weld): SMAW using E6010 (5 mm) and E7018-1 (10 mm) on plate ASTM A 516 Gr 70 with thickness 15 mm,
WPS (butt weld): GTAW using ER70S-6 + SMAW using E7018-1 on pipe 10" ASTM A 106 Gr B with thickness 12.7 mm.
Thanks
Zirsald
Last edited by zirsald on Tue Nov 12, 2013 1:56 pm, edited 1 time in total.
zirsald
 
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Re: WPS based on multiple PQR as per ASME IX

Postby mohd » Sun Nov 10, 2013 4:23 pm

dear zirsald,

Yes you can combine them since ASME isn't restricted to pipe and plate WPS provided that no impact test is involved.

If impact is in picture then you cannot combine them since SA-516 70 is in Group 2 and SA-106 B is in Group 1.

I think and believe that E7018-1 used for low temp application and impact test is a must, isn't it?

regards
mohd.
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Re: WPS based on multiple PQR as per ASME IX

Postby zirsald » Tue Nov 12, 2013 1:48 pm

Dear Mohd,
Please note that neither is it for low temperature application nor is impact test required
thanks
zirsald
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Re: WPS based on multiple PQR as per ASME IX

Postby mawsamit » Wed Nov 13, 2013 2:27 pm

Mohd,
Please let me disagree with you since in such a case the required WPS cannot be qualified by the combination of PQR1 and PQR2. Please have a look at QW-200.4 (a) "QW-451 shall be used to determine the range of base metal thickness and maximum weld metal thickness qualified for each process, filler metal, or set of variables". Taking into consideration the QW-451 the range of thickness of base metal qualified for the GTAW process is 1.5 mm to 12 mm and thus that process cannot be used for base metals thicker than 12 mm (the required WPS calls for base metal thickness 12.7 mm). The exception of QW-200.4 (b) doesn't cover that case since in that exception the GTAW welding had to be performed on a base metal with at least 13 mm thickness.
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Re: WPS based on multiple PQR as per ASME IX

Postby amit mavai » Thu Apr 07, 2016 1:06 pm

Dear Mohd,
Supposing that the base metal (need to be welded) thickness is 14 mm, then can we use the combination of PQR1 & PQR2?
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Re: WPS based on multiple PQR as per ASME IX

Postby Ballbearing » Mon May 30, 2016 1:56 am

Please refer response from mawsamit.
You cannot combine the two PQR's to cover 14 mm (GTAW 12 mm maximum base metal).
Regards,
BB
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