“You’re not looking for plumbing pipe, you need electrical conduit”
I think , metallic conduits (copper / galvanised steel) can only be used for water / gas. These sizes are in mm or thumb, not inches….
Steel electrical conduits aren’t being used here since the sixties, as we say : “the shit don’t mix” (electric wires and steel conduit is a dangerous combo , espcially the old tubes with weld seams, maybe they are being used in some professional setup but as far as i know they now use flame retardant electrical conduit made of some kind of plastic…)
Hence : not available….