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Posted by Todd Spacek on April 09, 2002 at 19:38:59:
In Reply to: Re: Vented Flash Tank Requirements posted by GBurns on April 05, 2002 at 15:01:23:
Dburn,
Sorry about the confusion. I have an existing condensate receiver tank. It is a typical receiver tank that is mounted on a pipe stand 5' off of the ground. The tank is piped to a duplex set of steam powered pumps. Currently the tank has low pressure drips from heat exchangers and other heating equipment draining to the tank. The tank is vented to the atmosphere. Now, I want add high pressure returns to this tank. If I do this, I know that the high pressure return will hit the atmospheric tank and flash steam will form. Does this preclude that it should be considered a pressure vessel? The vent, if size properly, will always maintain 0 psig pressure in the tank. Still, who dictates when this is pressure vessel? The designer?