Posted by scott on July 26, 2001 at 12:15:52:
In Reply to: Re: temp. posted by Harold Kestenholz - Hydronic Network on July 25, 2001 at 19:34:34:
: The temperature of the saturated steam at 25 psig is 267 degrees Fahrenheit, so the steam is a little over 25 psig in the pipe or the thermometer you used is off a bit. If you lower the pressure, the temperature will be lower; but can your steam process work at a lower pressure? You might consider insulating the lines.
Although the saturation temperature of 25 psig steam is 267 deg. F, 25 psig steam can have a higher temperature. In fact, it is usually desirable to have superheated steam in most applications to prevent condensation in the lines, which could lead to steam hammering. Apparently, you are only operating with 2 degrees of superheat, in which case I would suspect that your steam is rather "wet". If you did want lower temperature steam, then lowering the pressure is the only option.