Extruded Polyolefin Resin Coating Systems with Soft Adhesives for Underground or Submerged Pipe

Details materials and methods of application for two types of polyolefin resin coating systems extruded over soft adhesives on pipe for underground or submerged service. The standard addresses surface preparation, application methods, electrical inspection, pipe handling techniques, and coating system repair methods. The two types of coating systems are (1) polyolefin resin that is crosshead-extruded on the pipe as a seamless coating over a hot-applied mastic adhesive, and (2) polyolefin resin that is extruded spirally around the pipe to fuse and form as a seamless coating over an extruded butyl-rubber adhesive.