Not going to comment except to say, I completely plumbed the machine and fab shop I own in black pipe. Bought it in mill lengths from my steel supplier and I own a Rigid pipe threading machine so I cut and threaded the mill lengths as required and all the main runs are in 1.5" diameter, drops are 1" and all terminate in WOG valves with QD fittings and an additional WOG valve at the bottom of the drops to drain off any condensate. I have 2 compressors, a 10 horse Quincy pressure lubed reciprocating unit and a Sullaire Screw compressor as well as 2 150 gallon receivers and an IR refrigerated dryer on the Quincy's outlet but I still use Motorguard cannister separators on both the CNC plasma table as well as the plasma torch that sits on the TIG welding cabinet and I run a 'Tsunami' auto drain valve on the bottom of the Quincy receiver. The Sullaire screw compressor has it's own built in refrigerated dryer. When you have 2 employees and mostly air operated tools plus the plasma table, air demand is very high. One thing I did was I dialed back the maximum pressure output to 135 psi which is plenty for any air tool and the lower pressure results in less heat generated in the pressurized air thus less condensate generated as well as longer compressor life due to less carbon buildup on the reed valves in the Quincy. The screw compressor don't suffer from carbon buildup as it's design precludes reed valves.
My air system has been in almost daily operation for over 15 years now and no failures ever.
Not a fan and never a fan of anything but black iron air piping, but then I do own the tools necessary to install it.
