Inversion liner and liner components for conduits

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

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F16L 55/16 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2490231

Conduit liners (300) are provided which in a first embodiment include first and second flexible fabric layers (218, 238) joined to first and second high strength fiber containing layers (234, 224) and joined in tubular form, whereby the first and second flexible fabric layers face one another. One of the high strength fiber containing layers (234) or (224) further is joined to a substantially fluid impermeable layer, which can be directly bonded to one of said layers, or indirectly joined by way of a third flexible fabric layer. The disclosed method and liner construction can save one or more steps in the manufacture of glass-reinforced, polyester felt inversion liners.

L'invention concerne des gaines de conduit (300) qui, dans un premier mode de réalisation de cette invention, comprennent des première et seconde couches de tissu flexibles (218, 238) jointes à des première et seconde couches contenant des fibres à résistance élevée (234, 224) sous forme tubulaire, les première et seconde couches de tissu flexibles étant situées face à face. L'une des couches contenant des fibres à résistance élevée (234) ou (224) est également jointe à une couche sensiblement imperméable au fluide, laquelle peut être directement liée à l'une de ces couches, ou indirectement liée au moyen d'une troisième couche de tissu flexible. Le procédé et la construction de gaine de cette invention peuvent permettre d'économiser au moins une étape dans la fabrication de gaines d'inversion de polyester renforcées à la fibre de verre.

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