Re: welding failure of the feed nipple entering the drum


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Posted by Tom on October 14, 2001 at 07:56:11:

In Reply to: welding failure of the feed nipple entering the drum posted by gk on October 14, 2001 at 01:14:20:

: ours is a water tube boiler. we are frequently finding one of the nipples joined to the drum is failing at the point of
: welding. this failure occurs every two years or so. we have to reweld the nipple. this particular problem
: is not periodic and is rather random. suddenly a crack will appear and it starts leaking steam.

: what could be the reason for failure of only this welding? and why not any other nipple, such as gauge glass
: nipple or instrument connection nipple or soot blower nipple or air vent nipple.

: some body try to explain.

: thanks
: gopi




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