Method of lining a pipe

Details Method of lining a pipe Method of lining a pipe

B - Operations, Transporting

29

C

B29C 63/46 (2006.01) B29C 63/34 (2006.01) B29C 65/00 (2006.01) B29C 65/14 (2006.01) F16L 55/165 (2006.01) B29C 35/08 (2006.01)

Patent

CA 2088198

A method of lining a pipeline (24) intended to carry gas, oil, water, sewage or chemicals in which a cross-linked polymeric liner pipe (10), which has been reduced from its original diameter to a lesser diameter or to a shape of reduced maximum dimension, is pulled through the pipeline (24). The lesser diameter is less than the least inner diameter of the pipeline (24). After the liner pipe (10) has been fully pulled through, the pipe liner (10) is heated by means of a source (60) of visible or infrared radiation forming part of a pig assembly (50) to cause it to revert to the pipeline. The pig assembly or assemblies are stationary at zones (70) where service connections are to be made. Subsequently, the remaining liner pipe (10) is reverted by pulling the source (60) through the liner pipe (10).

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