Type 2 Weld (UW-12) for Shell Longitudinal Seams

[Estassoc]

We are designing a split shell gallery sections on
a tall tray column and plans to use a single butt weld
with backing strip on the longitudinal seam and a groove
weld on the flat plate ring closure on both ends of the
gallery section shell.

Is this type of weld on a Category A joint allowed in ASME certified pressure vessels (no service restrictions)?

Any help will be greatly appreciated.

 

[gr2vessels]

Yes, for the case you mentioned (no service restriction). That is, the strip may remain in place, provided it is operating in non-corrosive service.
cheers,
gr2vessels