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[MW:13886] Impact test qualification requirement for WPS/PQR

By Materials & Welding
Dear All,
 
Greetings.
 
A vessel is being fabricated as per ASME SEC VIII DIV 1.
 
Vessel material is SA 387 GR 12 CL2, 65 THK. MDMT is   -18 DEG CELCIUS.
 
Approved WPS is supported by  2 PQR  detailed as below --
 
PQR 1
 
Test coupon thickness - 40 mm ,
Welding process used - GTAW + SMAW + SAW ,
Weld deposit by SMAW  Process is 19 mm.
Weld deposited by SMAW  is impact tested at   0 deg celcius.
 
PQR 2
 
Test coupon thickness - 10 mm ,
Welding process used - GTAW + SMAW ,
Weld deposit by SMAW  Process is 8 mm.
Weld deposited by SMAW  is impact tested at    - 18 deg celcius.
 
Whether  PQR  2 can be used for SMAW  Process to deposit  21 mm weld in a weld groove of 65 mm in depth .( for closing seam of shell to dished head & nozzle to dished  head weld seam)
 
Please advice. please give ASME SEC IX Reference.
 
Thanks & Regards
 
Asad Azmi
 

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