A lot of electrical wiring is routed through relatively thin wall, galvanized steel piping here. That piping is sold as "EMT Conduit".
For copper pipes, we can buy 1 inch outside diameter copper tubing, sold for water supply piping. That stuff is hardened, so it doesn't bend at all easy. For that, we can buy copper elbow (and other) fittings that are made to be soldered to the tubing. The one described in this forum wasn't soldered, but was attached using a liquid "solder" that glues the parts together without needing to be heated with a torch. There are many options for that, from epoxy materials to methacrylate glue.