| 摘要 |
The specification discloses both a method of protecting a metal pipeline length (10) from corrosion, in use, and such a pipeline length (10) produced by the method, the method involving winding at least one plastics material web (14, 16) under tension in a plurality of at least partially adhering overlapping spiral windings (20) to form a barrier layer (17) around the pipe (10) to prevent moisture penetrating from an outer surface of the barrier layer (17) to an outer surface (24) of the pipe (10), the pipeline length further having an outer protective layer (21) also formed by winding plastics film web about the pipeline length, the webs forming the protective layer (21) being more loosely wound than those forming the barrier layer (17). |
