Patent ID: 8910852
Filing Date: 2014-12-16
Classification: B23K,B29C,F16L

Abstract:
1. A method of coating a cutback exposing a welded joint of two adjacent pipes along a pipeline, the method comprising the steps of: extruding a protective sheet about the cutback from an extrusion outlet of an extruder wherein the extrusion outlet is positioned adjacent and facing the cutback area; simultaneously rotating the extruder extrusion outlet and the extruder about the pipeline as the protective sheet is extruded from the extrusion outlet while maintaining the position of the extrusion outlet relative to the cutback area; covering the entire cutback area with the protective sheet by a single turn of the extruder and the extrusion outlet about the axis of the pipeline; and compressing the protective sheet on the cutback area while simultaneously winding the protective sheet.