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Posted by Dan on February 26, 2004 at 22:06:30:
In Reply to: Re: 600# 700 degree superheated steam boiler bottom blows posted by Pete on January 12, 2004 at 12:11:20:
Industry practice is to come to a lower firing rate anywhere from lowfire to 25% then blowdown the boiler but its very unlikley you recieved a tube failure from blowing down the mud drum at a elavated firing rate for no more than a few minutes. CE are built like tanks and tubes do just fail. Theres no need to try and hang a guy for it. If you really want to know why it failed, then get the tube analyzed but it would probobly cost you 15-20 grand. Its also pretty common for plants to blowdown there boilers at a higher firing rate due to the fact that steam production out ways the cost of take the boiler to lowfire or a reduce capacity.
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