System and method for pipe repair

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

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F16L 55/175 (2006.01) B29C 70/34 (2006.01) B29C 70/36 (2006.01)

Patent

CA 2683782

A system and method of reinforcing a portion of a pipe (30), including applying a fiber structure (12) to the portion of the pipe to be reinforced, and pressurizing.resin (41) through the fiber structure to the portion of the pipe to substantially saturate the fiber structure with resin, wherein the resin comprises a viscosity of less than about 10,000 cP and a surface tension of less than about 30 dynes. The resin is permitted to cure under ambient conditions at a peak exotherm of greater than about 200 OF, wherein the cured resin comprises a glass transition temperature of greater than about 150 OF and a heat distortion temperature of greater than about 150 OF. Pressurizing the resin may include use of a reinforcing containment (36) and underlying pliable mold (300) that is compressed to pressure the resin through the fiber structure to the pipe.

L'invention concerne un système et un procédé de renforcement d'une partie d'un tuyau (30), qui consiste à disposer une structure de fibre (12) sur une partie du tuyau à renforcer, et à envoyer à cette dernière, à travers la structure de fibre, une résine (41) sous pression destinée à saturer sensiblement la structure de fibre. Cette résine présente une viscosité inférieure à environ 10.000 cP et une tension superficielle inférieure à environ 30 dynes. La résine est mise en cuisson dans des conditions ambiantes selon un exotherme de pointe supérieur à environ 200 OF. La résiine polymérisée présente une température de transition vitreuse supérieure à environ 150 OF. La mise sous pression de la résine peut consiter à utiliser une enveloppe de sécurité renforcée (36), et un moule pliable sous-jacent (300) comprimé de façon à mettre la résine sous pression à travers la structure de fibre du tuyau.

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