venting

GTD

How to calucate how much air in a steam pipe

Fred

Your can purchase Gerry Gill's book " Steam Venting, Balancing a Steam System using a Vent Capacity Chart" at the store on this site. It's only $10.00 and the money goes to charity. It will give you the amount of air per foot of pipe, based on the diameter of the pipe and you can also look at the various main and radiator vents to calculate what type and number of vents you need to vent that volume of air.

GTD

Thank you

BobC

You can find charts that do that for you or you can calculate it yourself.

Volume = pi X radius^2 x 12 that gives you the volume of air for one foot of pipe.

If you had a 3" pipe the calculation would be:
3.1416 X 1.5^2 X 12 = 84.8 cubic inches per running foot

if you divide that by 1728 you get 0.0491 cubic ft per runing foot of 3" pipe.

Bob