Here is what I am asking.I have a heavy duty I/R compressor on
60 gallon tank.For the sake of this thread lets say it is rated at
the outlet of the compressor 15CFM @ 90 lbs.I want to plumb
in 1/2 black pipe that on one side of the shop would be from 50' to 70'(with outlets quick connectors every 16') and in the middle of that a "T" that go up and over to feed the other side
of the shop and two outlets that might total another 50'.

The question is given the footage of black pipe is there a lost of CFM at the quick connectors??.How is that figured out??.If I have had second 60 gallon tank,would that effect the CFM rating??