Drying to -20C Dew Point
Drying to -20C Dew Point
(OP)
Does anyone have a procedure for drying a pressure vessel to a -20C dew point and then purging with nitrogen?. What pressure is required for a -20C dew point? Is there a table of dew points and pressures required to meet them? Thanks





RE: Drying to -20C Dew Point
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Drying to -20C Dew Point
minus 20C is about 0.1 Kpa(a)
Otherwise it doesn't make sense. Best way is simply to blow warm dry (-20 @ ambit) air through the vessel.
There are lots of people who do this, e.g. http://www.h-t-c.co.uk/pipeline-drying.php
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Drying to -20C Dew Point
RE: Drying to -20C Dew Point
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Drying to -20C Dew Point
Dont see the purpose of dropping the vessel pressure further from say 0.8kpa abs to 0.1 kpa abs with the vac pump.
RE: Drying to -20C Dew Point
RE: Drying to -20C Dew Point
http://www.engineersedge.com/h2o_boil_pressure.htm
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Drying to -20C Dew Point
RE: Drying to -20C Dew Point
Probably far more important to know what the dew point was of whatever gas you filled it with??
normally pure N2 from a bottle is well below minus 40 and will swamp any air or moisture left.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Drying to -20C Dew Point