Piping for PSV on thermal relief
Piping for PSV on thermal relief
(OP)
I have a question addition to the discussions on thread1203-147200: Thermal Expansion Relief in Piping. I agree a norminal D size PSV is more than adequate to handle liquid thermal expansion.
Once the PSV spec is determined, can the piping pressure loss calculation be exempted due to the small quantity of the relief load? Does the inlet/outlet piping pressure loss have to be compliant with the principles of <3% and <10% of set pressure ?
If piping calculation is needed, should the required relief load or PSV relief capacity be used for delta P calculation?
Once the PSV spec is determined, can the piping pressure loss calculation be exempted due to the small quantity of the relief load? Does the inlet/outlet piping pressure loss have to be compliant with the principles of <3% and <10% of set pressure ?
If piping calculation is needed, should the required relief load or PSV relief capacity be used for delta P calculation?





RE: Piping for PSV on thermal relief
RE: Piping for PSV on thermal relief
Even on long shipping lines, it is probably rare that the flow back to a source tank will be an issue - most relief lines do not go that far (they try to find the nearest low pressure relief) since it is cost that really doesn't do much for the process (strictly protection).
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RE: Piping for PSV on thermal relief