I have a question relate to the Hysys. fro example when pressure control is fail close it can cause the pressure in vessel rises( back flow pressure).so I want to Convert PI to a transmitter and add a high pressure alarm. For this to count as a layer of protection we would need to check how fast the pressure rises if PV fails closed – there needs to be enough time for the operator to react to the alarm.
that we can you Hysys to calculate time? if we can use Hysys, can you give me the step or any example relate to this problem?