Interpretation Detail  
Standard Designation: BPV Section VIII Div 1
Edition/Addenda: 2013
Para./Fig./Table No: UW-28(b)
Subject Description: Seal weld qualification
Date Issued: 11/24/2015
Record Number: 15-1604
Interpretation Number :
Question(s) and Reply(ies):

Question: Seal welding is applied between tubes expanded into a tubesheet and a corrosion resistant weld metal overlay applied to the surface of the tubesheet. The strength of the clad material has not been considered in the tubesheet design. Do the rules of UW-28 exempt these seal welds from welding procedure qualification?

Reply: No.

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