Selecting field joint coatings for two-and three-layer extruded pipe coating

摘要

Two-layer polyethylene (2LPE) extruded coatings have been used on pipelines for quite some time. Their successors, three-layer PE (3LPE) and polypropylene (3LPP), are among the msot rugged plant applied corrosion protection systems available for underground and sub-sea pipe. Overall use of both of these coating systems is increasing, although their use on pipelines in the USA is limited.