FIELD: technological processes.
SUBSTANCE: invention relates to production of inner surface of metal pipe lined with polymer coating. Method of applying a polymer coating, wherein a polymer layer is applied on the inner surface of the metal pipe, a pipe is heated from an outer side and a calibrating tool of a cylindrical shape with a forming cone is drawn through the inner hole of the pipe. Then, the high-frequency section is heated by the high-frequency section of the polymer and then subjected to calibration by magnetically hard material, the power lines of which are directed along the pipe axis; at that, formation of the internal structure of the polymer and orientation of polymer chains along the direction of power lines along the pipeline axis.
EFFECT: high surface quality and wear resistance of the lined layer of the polymer coating which is deposited on the inner surface of the metal tube.
1 cl, 1 dwg
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