Hello all,
I'm sizing a blowdown valve in Hysys by using the Hysys Blowdown utility. I understand that the blowdown initial conditions should be at PZAHH (high pressure trip) and normal operating temperature. I'm curious does anyone know why it is standard practice to set the initial conditions like this? I'm looking through API521 and I'm not sure where it states that the blowdown initial conditions are set.
Thanks in advance.