Fired Heater PSV sizing
Fired Heater PSV sizing
(OP)
Hey there everyone,
I have a fired heater 150# steam generator. There is a PSV at the outlet of steam. How to calculate required capacity?? I used ASME 1 absorption rate / 1000 to find the required capacity. However, the data sheet for the PSV shows a much higher flowrate. I am a little weary with the ASME 1 as it says the formula finds "minimum" required capacity, so I don't think it is what should be used to size the PSV. Anyone knows how to find the required capacity for a fired heater PSV??
Thanks!
I have a fired heater 150# steam generator. There is a PSV at the outlet of steam. How to calculate required capacity?? I used ASME 1 absorption rate / 1000 to find the required capacity. However, the data sheet for the PSV shows a much higher flowrate. I am a little weary with the ASME 1 as it says the formula finds "minimum" required capacity, so I don't think it is what should be used to size the PSV. Anyone knows how to find the required capacity for a fired heater PSV??
Thanks!





RE: Fired Heater PSV sizing
RE: Fired Heater PSV sizing
For ASME Sec I equipment there are no calculations. Safety valves are sized prescriptively, based on the nameplate steam generation capacity of the boiler. It's simple, but you have to follow the rules exactly as stated. If you don't have a copy of Sec I you'll need one.