Can WPS be qualified using base metals for clad material?
Can WPS be qualified using base metals for clad material?
(OP)
Hello All, I'm new in this forum and I need a bit of help.
A vessel fabricator is requesting to qualify their WPS for weld overlay of vessel wall (C-Mn Steel with 410S Clad) using just the base metal wihtout the cladding. Is this allowed by the code? Isn't the P Numbers different? Appreciate help. Thanks
A vessel fabricator is requesting to qualify their WPS for weld overlay of vessel wall (C-Mn Steel with 410S Clad) using just the base metal wihtout the cladding. Is this allowed by the code? Isn't the P Numbers different? Appreciate help. Thanks





RE: Can WPS be qualified using base metals for clad material?
Something is not quite clear in your post;- an established pressure vessels fabricator with experience in the field, has generated a WPS for welding stainless steel material on carbon steel material and want to qualify the WPS with a PQR for P1 welded to P1? Did you check their records on vessel fabrication? It might be their first...
Obviously, they need a WPS and a fully qualified PQR for the Stainless Steel weld overlay. Refer also to ASME SA 264.
However, if you refer to the closing seam of the shell or head to shell, you will probably remove the existing overlay from the vicinity of the seam and weld the joint as carbon steel only, do the NDT's and then cover the long / circ seam with weld overlay. That's a more likely scenario.
gr2vessels
RE: Can WPS be qualified using base metals for clad material?
Perfectly acceptable, if that is the case.
RE: Can WPS be qualified using base metals for clad material?
RE: Can WPS be qualified using base metals for clad material?
RE: Can WPS be qualified using base metals for clad material?
Seperate groove weld qualification on P1 to P1 materials and a corrosion resistant overlay qualification comply with ASME IX and ASME VIII.
Single groove weld qualification on 410 clad P1-material will also satisfy ASME IX and ASME VIII requirements
RE: Can WPS be qualified using base metals for clad material?
cheers,
gr2vessels
RE: Can WPS be qualified using base metals for clad material?
While I may have misinterpretted the original query, I believe that my statements are compliant with UCL-40, and QW-217.