Patent ID: 8231943

Claim:
A method for forming a girth-welded metal pipe, said method comprising the steps of: a) providing two sections of metal pipe, each section of metal pipe having at least a first polymeric coating disposed on an outer surface thereof, wherein each of the sections of metal pipe also includes an exposed portion near an end of each of the sections, b) aligning said ends of the metal pipes end-to-end and welding together said ends so as to form a girth weld that joins the metal pipes, and c) applying a second polymeric coating comprising a sheet wrap or extrudate of a film that comprises a multi-layer system having a first layer that comprises a layer of epoxy/olefin semi- or full-interpenetrating polymer network (IPN) and a protective layer that comprises a thermoplastic top coat layer to said girth weld and to an additional area of coated pipe near the girth weld to form a girth weld coating that seals and protects the girth weld from corrosion.