copper vs pvc compressor lines?

I'm in charge of maintenance for an textile company & have 2 factories in my care. When PVC lets go it explodes with such force that once I found pieces imbedded in drywall 10 feet away. Fortunately noone was around at the time. All PVC pipe was removed.
When residential copper pipe is used, the only issues are accidentially crushing the pipe & joints letting go. No big deal, just make sure there are wall clamps on the secondary side of all joints.
Personally I prefer Sched 40 blk pipe. Like others have said, it can be cut & threaded to any length you want, it's strong [in 33 years I've never seen a pipe burst] & it's cheaper than copper. Just make sure to use teflon tape on the threads.
BTW, if you use filter/regulator/lubricator assemblies with polycarbonate bowls, make sure to have metal cages on them.