Method and apparatus for repairing conduits

Details Method and apparatus for repairing conduits Method and apparatus for repairing conduits

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 55/162 (2006.01) F16L 55/163 (2006.01) F16L 55/18 (2006.01)

Patent

CA 2131291

Method and apparatus for internal repair of conduit system. An inner sleeve (1) is employed which is configured to avoid undue pressure being applied to the inner surface of a damaged conduit section as it is expanded into position. A grouting area is defined between the outer surface (2) of the sleeve and the inner surface of the conduit section or sections being repaired. In one embodiment, a layer of opencelled material is placed around the coiled sleeve, which is thereafter impregnated with the quantity of grout. In this embodiment of the invention, each longitudinal end (3) of the sleeve is flared outwardly for contacting the inner surface of the damaged conduit section and for retaining the grout as it is squeezed out of the gasket upon the expansion of the inner sleeve to its expanded and locked position.

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