Patent ID: 6165302
Filing Date: 2000-12-26
Classification: B05D,F16L

Abstract:
A process for repairing an existing plastic coating of a metal pipe which has a portion of the coating removed, thereby exposing a portion of the metal pipe, comprising the following steps:A) sanding the exposed portion of the metal pipe which is surrounded by an unremoved portion of the existing plastic coating,B) applying shells made of a rigid material on edges of the existing plastic coating surrounding the exposed portion of the metal pipe,C) heating the exposed portion of the metal pipe by induction to a temperature ranging from 140.degree. to 270.degree. C.,D) applying an epoxy primer in powder form, and a polyolefin adhesive in powder form, onto the exposed portion of the metal pipe,E) removing the rigid shells,applying a replacement coating by wrapping a polyolefin tape over the epoxy primer and the polyolefin adhesive and heating the polyolefin tape with an inert gas-shielded flame wherein the rigid shells are removed before or after the wrapping with the polyolefin tape.