Pipe-joining method for building hydrocarbon pipelines, in particular, underwater pipelines

摘要

A pipe-joining method for building a hydrocarbon pipeline, in particular an underwater pipeline, whereby, after welding two adjacent pipes (2) to form a cutback (10), a protective coating (20) is formed about the cutback (10) by : applying an LE (liquid epoxy) resin or a powdered FBE (fusion bonded epoxy) resin to the cutback (10) to form a first primer coat (11); applying a powdered polypropylene adhesive on top of the still- wet first coat (11) to form an auxiliary adhesive coat (12); fitting a polypropylene heat-shrink sleeve (13) around the auxiliary adhesive coat (12); and heating the sleeve (13) to shrink and bond it to the auxiliary adhesive coat (12).