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B31.1 boiler piping

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bhart192

Civil/Environmental
Joined
Feb 6, 2006
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81
Location
US
We provide NDE services to several clients, we have one that quoting a new boiler install , the owner provided a list of welds to be x-rayed which includes 815 socket welds sizes 1/2-1.5" , I have done this is the past to check for pull-back , socket welds are fillet welds ,we usually dye pen. these, we have done several boiler projects and always dye pen'd sockets , I don't have a B 31.1 code handy , does B3.1 require RT on socket welds . we will do whatever the owner wants but if its not required I like to be able to show that and save them some $.
 
IMHO, RT on socket welds is completely unnecessary.

The code requires the gap to be checked BEFORE welding...not after. So RT to check for gap (or pull back)is a moot point and not required by the code.
 
If you check B31.1 -2016 edition

MT or PT for socket welds of all sizes and thickness for service above 750 deg F (see Table 136.4)and VT for all other service conditions.
 
thanks guys we'll see
 
Whereas this is an Owner requirement and not the Code's, ask the Owner what he intends to get from the RT. I have had Owner/Engineer requirements for same to "verify" the gap. You will still need to PT/MT for the sockets as per metengr.
 
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