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Technical Discussions
daniel
daniel
06:28 Aug-03-2006
burn through rt interpretation

anyone know to how to interpretate "burn throuth" if the interpretation code was require B31.3...
can you provide me a resume with rt interpretation for b 31....
thanks


 
 Reply 
 
Ed M.
Ed M.
07:42 Aug-03-2006
Re: burn through rt interpretation
----------- Start Original Message -----------
: anyone know to how to interpretate "burn throuth" if the interpretation code was require B31.3...
: can you provide me a resume with rt interpretation for b 31....
: thanks
------------ End Original Message ------------

ASME B31.3 does not specifically address burn through. Figure 341.3.2 depicts "Typical Weld Imperfections". You may want to approach your Engineering Department about this. Otherwise, I would probably evaluate it as Root Concavity.


 
 Reply 
 
Nigel
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
07:05 Jun-05-2007
Re: burn through rt interpretation
Just noticed this (after all these months!) and I recalled all the cut-out samples of burn-through I saw a few years ago. Remember burn-through is not just wrong welding parameters, its total loss of control of the weld pool/fusion process because of too much heat and molten metal and too little backing support, so the whole weld pool just blows away. It causes ugly messes in the weld root, ragged, uneven, snotty - nothing like a nice bit of regular even root concavity. The samples were accompanied by their radiographs and AUT scans. Guess what - the radiographs showed them up real clear as just the ugly messes the cut-out samples showed them to be - the AUT hardly picked them up, just a few litle hits in the root! Of course with pulse-echo always supplemented by TOFD nowadays then the TOFD should show it up - shouldnt it?

----------- Start Original Message -----------
: : anyone know to how to interpretate "burn throuth" if the interpretation code was require B31.3...
: : can you provide me a resume with rt interpretation for b 31....
: : thanks
: ASME B31.3 does not specifically address burn through. Figure 341.3.2 depicts "Typical Weld Imperfections". You may want to approach your Engineering Department about this. Otherwise, I would probably evaluate it as Root Concavity.
------------ End Original Message ------------




 
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