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Posted by ChiefMark on January 22, 2005 at 09:39:52:
In Reply to: Re: Boiler Blowdowns posted by Vern on January 10, 2005 at 19:20:18:
: : May I have some input as if it is concidered safe or unsafe to operate a 700 hp 135 psi steam boiler with the blowdown valves locked closed. My concern is if I were to encounter a high water situation.
: This is not safe. You should contact the state boiler inspector where you live and ask him about this and follow his advice. Or if your insurance company has an inspector call them.
: Assuming that you intend to replace the blowdown tank, I don't believe that locking the blowdown valves is inherently unsafe - short term. If a high water condition were to occur, the operators can be instructed to trip the boiler if necessary until the water level can be stabilized. Under extreme conditions, the non-return valve can be closed. A disruption of steam supply to the customer or process is the only real risk I see in this situation.