Hi Latexman,
I am planning to use the 35 psig sizing pressure because I will get a smaller orifice L 3 x 4 than if I size using the 17 psig (17*1.1=18.7 psig) where I will get an orifice of N 4 X 6. The tank has a nitrogen blanket.
Thanks,
(PS: Did you keep a tale of engineers who ask...
I have another question which is bothering me. I am planning to size my valve for the MAWP ( 32 psig) of the vessel which will give me a "L" orifice 3 X 4. But I want to set this valve at 17 psig to avoid decomposition of one of my solvent. Can I use the L valve ? or do I have to purchase a...
Hi everyone,
Thanks very much for all of your responses.
Latexman here are the answers to your questions plus additional information:
PSV set point: 17 psig to avoid decomposition of solvent
Tank MAWP: 32 psig
Solvent tank design pressure: 25 psig
Solvent tank design temperature: 232 C...
THE SCENARIO FOR SIZING A PSV TO PROTECT A TANK WAS A HEAT EXCHANGER SPLIT TUBE RUPTURE. THE TUBE SIDE HAS MEDIUM PRESSURE STEAM WHICH WILL BE RELEASED TO A TANK FULL OF LIQUID SOLVENT. THE PSV TO PROTECT THE TANK WAS SIZED USING API 520 GAS/VAPOR EQUATION (6) SECTION 5.6.3.1 FOR CRITICAL...