2 replies to this topic

[sivaji1233]

Lift Gas at 90 kg/cm2g & 23 Deg C after pressure letdown to 11 kg/cm2g by means of PCV is used to empty out Crude Condensate Drum. In case of PCV failure, a protection with PSV available with set pressure of 47 kg/cm2g. What would be the relieving temperature of this PSV? Is it the temperature corresponding to let down of the Lift Gas from operating conditions to 51.7 kg/cm2g (10% of set pressure) which is around 5 Deg C or any other? Kindly let me know whether any standards related to above mentioned topic are available?

[Bobby Strain]

The temperature is whatever results from the relieving event. Why would you consider anything different?

 

Bobby

[amad]

For, relief condition (including PSV), we can refer to API 521. For CV failure, I used normal temperature for the calculation. Different with fire case (for example), it uses formula T1=P1/Pn*Tn where n=normal condition, 1=relieving T or P.

cmiiw

 

amad

Edited by amad, 29 August 2016 - 09:39 PM.