RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
(OP)
HELLO,
IN GENERAL FOR A PRESSURE VESSEL, HOW WOULD YOU CONSIDER THE RELIEF LOAD DEPRESSURIZATION VALVE DESIGN PEAK LOAD VS RELIEF VALVE DESIGN LOAD TO COMPARE TO EACH OTHER? EQUAL? ONE BIGGER THAN THE OTHER? THERE IS NO GENERAL RULE?
THIS IS CASE OF FIRE FOR BOTH (DEPRESSURIZATION DUE TO FIRE EMERGENCY, AND PSV SIZED FOR FIRE CASE). SUPPOSE THE VESSEL IS EQUIPPED WITH BOTH DEPRESSURIZATION VALVE AND PSV.
I WOULD EXPECT THE LOADS TO BE NOT VERY DIFFERENT FROM EACH OTHER.
THOUGHTS?
THANKS,
DTMGO1
IN GENERAL FOR A PRESSURE VESSEL, HOW WOULD YOU CONSIDER THE RELIEF LOAD DEPRESSURIZATION VALVE DESIGN PEAK LOAD VS RELIEF VALVE DESIGN LOAD TO COMPARE TO EACH OTHER? EQUAL? ONE BIGGER THAN THE OTHER? THERE IS NO GENERAL RULE?
THIS IS CASE OF FIRE FOR BOTH (DEPRESSURIZATION DUE TO FIRE EMERGENCY, AND PSV SIZED FOR FIRE CASE). SUPPOSE THE VESSEL IS EQUIPPED WITH BOTH DEPRESSURIZATION VALVE AND PSV.
I WOULD EXPECT THE LOADS TO BE NOT VERY DIFFERENT FROM EACH OTHER.
THOUGHTS?
THANKS,
DTMGO1





RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
If there is anything like general I would expect a PSV to have a higher flow, but wholly dependent on Blowdown volume.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
Good luck,
Latexman
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RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
IT SEEMS TO ME THAT THE PRESSURE HAS LOW IMPACT ON THE RATE OF VAPORIZATION DUE TO FIRE HEAT FLOW. THE VOLUME OF THE VESSEL IS FIXED AND RELATIVELY SMALL COMPARED TO THE VOLUME OF VAPOURS GENERATED, SO ANY PHASE CHANGE WILL VERY QUICKLY RAISE THE PRESSURE. ANY RELIEF OF VAPOUR WILL VERY QUICKLY LOWER THE PRESSURE UNLESS NEW VAPOUR IS TAKING ITS PLACE.
FURTHERMORE, MASS HEAT OF VAPORIZATION IS NOT A STRONG FUNCTION OF PRESSURE. MOST THINK ERRONEOSLY THAT LIGHTER HIDROCARBONS HAVE SMALLER MASS HEAT OF VAPORIZATION THAN HEAVIER ONES, BUT THE CASE IS THE OPPOSITE.
GIVEN THAT PRESSURE SET POINTS FOR RELIEF HAVE NOT GOT A BIG IMPACT, I EXPECT BOTH LOADS TO BE SIMILAR AS PER ORIGINAL POST.
RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
Good luck,
Latexman
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
http://www.networketiquette.net/core_rules_do_not_...
Just one link, a quick google will come up with more pages than you likely want to read.
RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE
cheers,
RE: RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE