Hi,
Regarding individual (SMAW and GTAW) T limits what are you saying complies with QW-403.6, but you can not club those two PQRs and lower the T limit.
T is not the deposited weld metal thickness but the global (total) thickness.
I think in case you want to have a qualified WPS valid from 6 to 200 mm this is not possible when impact test is required.
UCS 67 does not give any exemption related to the type of the weld (A or B or D...) and the production impact test (UG084(i)) is not to be confused with the
WPS qualification
Dr. G. Dilintas
I&F Regional Technical Manager
Bureau Veritas Piraeus - Greece
Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Muhammed Ibrahim <ibratech@gmail.com>
Sent by: materials-welding@googlegroups.com 31/03/2010 17:26
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Hi Members,
Please provide a solution for the following issue.
Shell Material : SA 516 Gr.70 -- 50 mm Thk
Nozzle : SA 333 Gr.6 --- 7 mm thk
MDMT : - 46 Deg.C
I need to weld the nozzle to shell. I have a PQR with SMAW process qualified in 40 mm thk and another PQR with SMAW qualified in 6 mm thk.
As per Sec. IX if impact test is required the 40 mm PQR will support from 16 mm to 200 mm. base metal Thk. and the other PQR will support from 6 mm to 12 mm thk.
If I club these PQR can I write a WPS to support 6 mm to 200 mm?.
Is there any issue for the missing range of qualification between 12 mm to 16 mm?.
Or is it required to add another PQR to fill the missing thickness range from 12 to 16 mm between the first two PQRs?.
Or can I write a WPS directly with range 5mm to 200mm omiting impact test requirement for this joint as it is a category D joint and excempted from Production Test Coupon?.
Thanks & Regards
Muhammed Ibrahim PK
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