How to calculate air flow rate from pressure and pipe diameter

[hoshe]

I need to hook up an instrument that requires a source of compressed air at 47psi and 4cfm. I have a pressure gauge so I can measure the pressure at the source. It seems to me that I should be able to calculate the flow rate if I know the pressure and the diameter of the pipe. Can anyone help me figure that out?

 

[Q_Goest]

Try this thread: https://www.physicsforums.com/showthread.php?t=179830&highlight=pipe+flo