Method of Producing a Composite Pipe and Such a Composite Pipe

摘要

A composite pipe comprises a polyetheretherketone innermost pipe around which a reinforcing overwrap is arranged. A protective sheath surrounds the overwrap. Such a composite pipe may be made by selecting a polyetheretherketone pipe having an outer region having a crystallinity of less than 25%; overlaying the selected pipe with overwrap; and subjecting the combination to heat, thereby causing the crystallinity of the outer region of the polyetheretherketone pipe to increase. The method reduces the risk of pipe failure.

主权项

1. A composite pipe comprising a pipe having an outer region comprising a polymeric material having a crystallinity of greater than 25%, said pipe being overlaid with a reinforcing structure, wherein said polymeric material includes:
(a) phenyl moieties; (b) at least one of ether and thioether moieties, and (c) at least one of ketone and sulphone moieties.