2 replies to this topic

[nivedita12]

In Hysis 

I am sizing control valve failure for a fuel gas line

What is the formula used in hysis for required relieving load for a control valve failure case for gas.

 

I used Qmax  which is given in the attached spreadsheet  for my relief load calculation through control valve.

I have got a max load =  4435 lb/hr.

 

the calculated load is 4426 lb/hr in hysis

But the required relieving load says = 2795 lb/hr based on which the orifice area has been sized. 

 

Kindly explain the formula involved in Hysis for Required relieving load  

 

Attached Files

•  PSV-60203.xlsx   24.46KB   14 downloads

[Bobby Strain]

When you are designing overpressure protection devices, you should definitely know what you are doing. If you don't, you should consult your supervisor.

 

Bobby

[nivedita12]

Sure thank you I did and I got the relieving load formula thank you  I referred API 520,521