what is main cause of such crack?
what is main cause of such crack?
(OP)
After only 3 moths in service Crack was observed adjacent to HAZ of nozzle to shell fillet weld of new constructed Methanol Drum (vessel). Crack occurred on shell perpendicular to weld bead. There is no cyclic stress.
Nozzle dia is 3" thickness 18mm
Shell wall thickness 6mm
Material Carbon steel
The drum shell is thinner than the pipe nozzle thickness which is 1/3 thickness of the pipe nozzle.
Nozzle dia is 3" thickness 18mm
Shell wall thickness 6mm
Material Carbon steel
The drum shell is thinner than the pipe nozzle thickness which is 1/3 thickness of the pipe nozzle.





RE: what is main cause of such crack?
We need much more information on your problem one possible cause could be hydrogen embrittlement but there are lots more.
Look at this site:-
http:/
desertfox
RE: what is main cause of such crack?
That is not to mention outright defects.
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Plymouth Tube
RE: what is main cause of such crack?
RE: what is main cause of such crack?