Longitudinally reinforced cured in place liner and...

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

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F16L 55/165 (2006.01)

Patent

CA 2629769

A longitudinally reinforced resin impregnated cured in place liner (21) with at least an outer impermeable layer of a coated reinforcing scrim (35) to limit longitudinal stretch is provided. A continuous length of resin impregnable liner is provided in lay flat condition and impregnated. The impregnated liner is then fed into a tubular former where a resin impermeable coated scrim in tubular form having greater strength in the warp direction than in the weft direction is fed into a tubular form, sealed and continuously inverted about the inner tubular member so that the inverted wrapping envelopes the tubular member. The reinforced liner may have an integral inner impermeable layer (22) that may also be longitudinally reinforced is installed in an existing pipeline.

La présente invention concerne une doublure (21) durcie sur place imprégnée de résine et renforcée longitudinalement qui comprend au moins une couche imperméable externe d~un renfort (35) tissé revêtu afin de limiter l~étirement longitudinal. Une longueur continue d~une doublure pouvant être imprégnée de résine est appliquée à plat et imprégnée. Puis, la doublure imprégnée est introduite dans un dispositif de façonnage tubulaire dans lequel un renfort tissé revêtu imperméable à la résine de forme tubulaire, plus résistant dans la direction chaîne que dans la direction trame, prend une forme tubulaire et est scellé et replié en continu autour de l~élément tubulaire interne de manière à ce que l~emballage replié enveloppe l~élément tubulaire. La doublure renforcée peut se composer d~une couche (22) imperméable interne intégrée qui peut également être renforcée longitudinalement et peut être installée dans une canalisation existante.

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