Potable Water Storage Tank Vent Sizing
Potable Water Storage Tank Vent Sizing
(OP)
Dear all,
I have a problem calculating vent sizing for potable water storage tank (concrete), the tank is designed to operate at atmospheric pressure. The tank is 10.5 m Width , 14.5m Length and 4.5m height. Maximum level of water is 3.5m.
Maximum flow rate @ inlet = 350 US GPM and Maximum flow rate @ outlet 1000 US GPM.
I can not find any reference regarding this matter, all I can found is for tanks storing flammable fluids. Also in case of concrete tanks, will the breathing in & out of tank can really cause failure to structure?
Thanks
I have a problem calculating vent sizing for potable water storage tank (concrete), the tank is designed to operate at atmospheric pressure. The tank is 10.5 m Width , 14.5m Length and 4.5m height. Maximum level of water is 3.5m.
Maximum flow rate @ inlet = 350 US GPM and Maximum flow rate @ outlet 1000 US GPM.
I can not find any reference regarding this matter, all I can found is for tanks storing flammable fluids. Also in case of concrete tanks, will the breathing in & out of tank can really cause failure to structure?
Thanks
Amr Salah
Plumbing & Fire Protection Engineer





RE: Potable Water Storage Tank Vent Sizing
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Potable Water Storage Tank Vent Sizing
I need to submit calculation for this matter so I can not just put a larger pipe (although it would be sufficient). I need data to support my choice.
Thanks
Amr Salah
Plumbing & Fire Protection Engineer
RE: Potable Water Storage Tank Vent Sizing
Then just put ones in the same size or bigger than the water outlet pipe....
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Potable Water Storage Tank Vent Sizing
If you know the flow rate and need calculations for the vent, simplest solution is to use a commercially available "free vent" with flow data available. Varec has their flow data online, some of the others don't. Note that sizing a vent this way can give you a very small vent.
You can use duct-flow information from ASHRAE to estimate vent flow rates. They have data for screens, for exhaust hoods, for ells, etc., it's just a matter of hunting the information up and working out the details.
RE: Potable Water Storage Tank Vent Sizing