Would I push the pipe sections over a heated cone or would I rather heat
the pipe and push the heated plastic over a cold cone? Or is there a
better way?
I would exercise caution about heating PVC for prolonged periods; I think
it outgases nasty stuff. In this application perhaps a low heat would be
effective and safe.
I just remembered: I once made a water hose hanger of a six- or eight-inch
section of four-inch PVC. I cut across the pipe, leaving a wide "strap"
that I bent to 90 degrees so I could drill a hole and screw it to the wall.
As I recall, I laid the strap side of the pipe on the barrel stove and
tested every ten or twenty seconds. Didn't take long before the strap bent
easily.