copper vs pvc compressor lines?

Lonewolf3165 said

Black iron pipe over copper definitely. In some areas copper pipe is not allowed for compressed air due to codes. The copper pipe joints are sweated together & therfore the pressure rating cannot be guaranteed. Yes copper pipe is rated at a few hundred psi, but the solder joints are the weakest link. .

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If you are concerned about copper, look to AC units. What do the "modern" refrigerants run for head pressure? Way over 200 psi, that's what.

If you are concerned about sweated joints, braze them like we do in the HVAC industry...........a product commonly called silfos

I'm not necessarily promoting copper over black