The input of the pipe is inside a tank, so I do not believe adding a fan at this location is possible. As to the length it is ductwork going through a large plant, so I do not have length on hand, but it is quite long.
I have a length of pipe where air is being pulled through by a high powered fan at one end. The pipe is stainless steel, outer diameter is 100 inches. the thickness is 0.125 inches. I need to know what is the minimum vacuum pressure inside the pipe can be before the atmospheric pressure will...