F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 55/165 (2006.01)
Patent
CA 2230538
A method for rehabiliting existing pipelines in-situ is disclosed. A tubular liner (5) of a generally absorbent material is formed and at least one expandable bladder (7) is fed into the liner (5). The liner (5) is impregnated with a cold curable resin. The external surface of the liner and/or the internal surface of the pipeline (8) to be rehabilited is coated with a water resistant adhesive coating (16) prior to being fed into the pipeline (8) to be rehabilited together with its associated bladder (7). The bladder (7) is then inflated with a gaseous fluid to force the liner (5) against the internal wall (19) of said pipeline; and the inflation is maintained until the resin impregnated liner (5) has cured. The bladder (7) may then be removed from the cured liner (5).
L'invention porte sur un procédé de rénovation in-situ de conduites. Un doublage tubulaire (5) d'un matériau sensiblement absorbant est formé et reçoit une vessie gonflable (7), puis le doublage (5) est imprégné d'une résine durcissant à froid, la surface extérieure du doublage et/ou la surface intérieure de la conduite ((8) à rénover sont revêtues d'un revêtement adhésif hydrofuge (16) avant introduction dans la conduite (8) avec la vessie associée (8). On gonfle alors la vessie (7) à l'aide d'un fluide gazeux de manière à plaquer le doublage (5) contre la paroi intérieure (19) de la conduite. La pression dans la vessie est maintenue jusqu'au durcissement du doublage (5) imprégné de résine. On peut alors retirer la vessie (7) du doublage durci (5).
Barry Kevin Francis Patrick Jr.
Blake Cassels & Graydon Llp
LandOfFree
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