Method for lining underground pipelines

F - Mech Eng,Light,Heat,Weapons – 16 – L

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

Patent

CA 2242098

Method for renovation of pipelines, comprising introduction of a lining pipe into an existing pipeline, said lining pipe having a length corresponding to the length to be renovated, and consisting of a fusible polymer in a folded condition and unfolding of the lining pipe in order to line the pipeline. The lining pipe is built up by introducing lining layer (1, 4, 5, 6, 7, 8, 9) into the pipeline to be lined, which layers are pressurised and successively fused together by subjecting each layer (1, 4-9) to fusion heat from a heat-source (3), which is carried along the inside of the innermost layer of lining built up so far.

Procédé de rénovation de pipelines qui consiste à introduire une conduite de doublage dans un pipeline existant, ladite conduite présentant une longueur correspondant à longueur de pipeline à rénover, et consistant en un polymère fusible à l'état replié. Ledit procédé consiste ensuite à déplier la conduite de doublage de manière que le pipeline soit doublé. On forme la conduite de doublage en introduisant des couches de doublage (1, 4, 5, 6, 7, 8, 9) dans le pipeline à doubler, lesquelles sont sous pression et exposées à une chaleur de fusion provenant d'une source de chaleur (3) qui est déplacée à l'intérieur de la couche la plus à l'intérieur du doublage déjà formé, le long de celle-ci, de sorte que lesdites couches fusionnent successivement les unes avec les autres.

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