This is a demonstration of processing a copper tube into a heat shrinkable tube using a carbon ring heater.
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Related page:
Heat shrink tube processing for electric wires 
Heat shrink tube processing of stainless steel pipe 
Heat shrink tube processing of aluminum pipe 
Heat shrink tube processing of reinforcing bars 
Shrinkage of heat shrink tube with heat resistance of 200℃ 
No.9 Waterproof protection for copper pipes 
Heating of the heat shrink tubing with the Halogen Ring Heater 
No.9 Heat source of heat shrink tunnel