Price of copper tubing!

I was just gonna sweat solder them like I do when I do water lines. I had a hotdog twin tank unit that the tanks sprung pinhole leaks, so I bought a dead oil-less pile o'crap and put my gas engine and good pump onto that tank, and when I did that tank swap that was all I did, and several years later that hybrid compressor still works fine, no leaks and it gets used ALOT. Though that is a single stage pump, where my garage compressor is a 2 stage that has higher pressure. I could regulate the 2 stage down a bit right out of the tank, what would sweat soldered copper tube be safe to, PSI wise? I can weld well enough but never done TIG. I can also braze sheet metal with oxyfuel pretty decently, but I've never brazed copper.