Oh, sorry. Forgot to answer the bit on final temperature. If your vessel has liquid in it, just flash it to atmospheric in one stage and that is your vessel final temperature (ignore heat input).
The B/D outlet nozzle also gets cold due to the polytropic expansion of the gas and the...
Blowdown these days is done via a ball valve and restriction orifice (RO). Control valves were used in the past and exist on some old plants but have been superceded primarily because they leaked and spring return fail open actuated ball valves are more reliable. Sizing relief valves and...