Abstract: An apparatus and method for repairing the juncture or intersection of a first conduit and a second conduit is disclosed. The apparatus includes a main body for transporting and positioning a repair material impregnated with at heat curable resin system or matrix. An inflation device carried within the main body positions and compresses the repair material against the intersection. This includes a portion of the interior of the second conduit and flange portion in the first conduit. The inflation device includes conductive fibers that are electrically conductively heated to effect curing of the resin in the repair material.

Abstract: The present invention provides a method for producing a repair material for use in repairing an interface area between two intersecting conduits. According to one aspect of the invention, a mold is provided having similar dimensions to an interface area. The interface area is defined by a first conduit and a flange connecting the first conduit to a second conduit. A repair material is provided having a material structure, the material structure defined by an arrangement of fibers such that the material structure has similar dimensions to the interface area. The arrangement of fibers further allowing the repair material to be flexible and seamless. A resin is provided, the resin having a resin viscosity. An additive is provided, the additive is adapted to increase the resin viscosity. The additive is mixed with the resin to form a resin-additive mixture whereby the resin viscosity is increased after a time delay.

Abstract: An apparatus and method for repairing the juncture or intersection of a first conduit and a second conduit is disclosed. The apparatus includes a main body for transporting and positioning a repair material impregnated with a heat curable resin system or matrix. An inflation device and caul plates carried by the main body position and compress the repair material against the intersection. This includes a portion of the interior of the second conduit and flange portion in the first conduit. The inflation device and caul plates include conductive fibers that are electrically resistively heated to effect curing of the resin in the repair material. Additionally, a method and liner apparatus for the in-situ repair of conduits having large diameters is disclosed. The liner comprising a plurality of discrete heating zones, where each zone impregnated with a curable resin. Each zone further having a fiber architecture, where the fiber architecture has a plurality of conductive fibers.

Abstract: A composite substrate for a fiber reinforced plastic part comprising a first outer thermoplastic sheet, an intermediate conductive layer or layers, and a second inner thermoplastic sheet. The composite substrate formed by electrically resistively heating the conductive layer or layers to melt the thermoplastic sheets, and applying pressure to consolidate the layers into a rigid substrate. The conductive layer or layers formed of a conductive fiber mat or tape. Additionally, a method is disclosed comprising providing a conductive filament impregnated with a resin; running the conductive filament through an electrical contact, the electrical contact connected to a supply of electric power; and, winding the filament to a mandrel including a second electrical contact connected to said supply of power. Electricity is then induced through the filament from the first contact to the second contact to resistively heat the filament and cure the resin.

Abstract: A method and lining for rehabilitating a pipe or conduit. The method comprising providing a heat curable resin impregnated lining with first and second conductive strips extending lengthwise through the lining from a first end to a second end and separated circumferentially by non-conductive material. Connecting the conductive strips together at said second end and causing a current to flow through said first conductive layer from said first end to said second end of said lining, and through said second conductive lining from said second end to said first end. The lining having a plurality of conductive strips extending lengthwise through the lining.