Dear
Refer to QW-200.4(a) of ASME Sec. IX, more than one WPS having different essential, supplementary essential or non-essential variables may be used in a single production joint. No need to qualify the multi-process PQR as per above clause.
You shall confirm that each WPS shall meet the base metal & weld metal thickness and other variables as required by that welding process need to be considered.
Regards,
L. Prabhu kumar,
Sr. Principal Engineer,
Equipments & Materials Dept.,
Saipem India Projects Limited,
Tel:+91 44 43906588, Ext.: 588, Fax:+91 44 66840345,
Mobile Ph. No.: +91 9003010978.
From:
Sent: Sunday, June 27, 2010 11:44 AM
To:
Subject: [MW:5759] multiprocess qualification(SAW+SMAW)
Frnds,
Here our job is welding of spiral pipes by GMAW + SAW.
Root is continuos tack welded by GMAW & ID & OD WELDED BY SAW.For this we have separate WPS & PQR.
In spiral pipe we have coil joints weld(skelp joints)for that we are doing root & ID welding by SAW but OD welded by SMAW.For this we don't have separate WPS & PQR.Instead we have only SMAW wps/pqr.I mean no multiprocess WPS/PQR.
Now my question is DO we need to qualify a separate PQR for this coil joint(skelp joint welding)i.e SAW + SMAW.
OR is it possible TO prepare a separate WPS taking the support of GMAW + SAW PQR & also SMAW PQR?
Pls tell all your opinion in respect to ASME SEC IX.
THANKS,
KK
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