How would I verify that choked flow will not occur, if say I want to keep the first half of the pipe routing at 8", and then bump it up in the second half so that my exit velocity is reasonable. Choke flow occurs when you're pressure drop is greater than your starting pressure?
Is it wildly inaccurate to assume linear pressure drop through the pipe? If I have 500 psia at one end of a 237 ft. pipe venting to atmosphere, I can roughly assume 2 psi per foot of pipe. I'm trying to increase the pipe size as I get closer to the outlet in accordance with fluid velocity...
I wasn't given that info nor have I calculated it. The 120,000 lb/hr is a maximum flow rating for the Flow Control Valve so assumed to be fully opened. Assuming that the pressure is roughly 500 psi after the valve.
I'm routing a vent from a start-up valve for a Boiler to atmosphere on the roof. This start-up valve remains open and vents steam while the pipe is warming up and the boiler reaches operating condition. I was given 550F at 500 psig at 120,000 lb/h as design conditions for the steam. Just...
