Temperature for PSV orifice sizing.
Temperature for PSV orifice sizing.
(OP)
When sizing an orifice for a pressure relief valve based on external fire and liquid storage, what temperature should be used? Is there a standard figure for all external fire cases? Should it be the boiling point of the liquid or can this be superheated by the fire?
The temperature at the relief valve is very important as it relates to gas density.
The temperature at the relief valve is very important as it relates to gas density.
RE: Temperature for PSV orifice sizing.
If you have a broad range boiling point liquid, a common practice is to do a 5% flash on the liquid and use the resulting temperature and associated properties (MW, compressibility).