If your fabrication is governed by ASME Boiler and Pressure Vessel Code the answer is unequivocally NO. You need to perform a qualification with P5B and P8 materials.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of JIJILAL K M
Sent: Wednesday, January 27, 2016 2:38 AM
To: materials-welding@googlegroups.com
Subject: [MW:24176] can use P15E wps for P5B
Dear Experts,
We've to weld 4" x 6.02 mm HRSG boiler piping joints (only 2 nos.).
Materials are P5B + P8 ( ASTM A335 P5 + ASTM 304L SS) .
There is no such qualified WPS.
instead we've a Qualified WPS for P15E + P8 ( ASTM A335 P91+ ASTM 358 316L SS) .
Can we use this WPS using filler wire ER-309?
JIJILAL K.M.
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