The invention is directed to a coupling fitting, having a pipeline and having a connector sleeve. The pipeline and connector sleeve are each separate parts and are fixedly and non-detachably connected to one another by a connecting ring which can be produced in situ by injection molding plastics material. The invention is also directed to a method for making the coupling fitting.

The invention is directed to a coupling fitting, having a pipeline and having a connector sleeve. The pipeline and connector sleeve are each separate parts and are fixedly and non-detachably connected to one another by a connecting ring which can be produced in situ by injection molding plastics material. The invention is also directed to a method for making the coupling fitting.

A method of repairing a polyolefin structure at a damaged area thereof containing applying a filler material as necessary to fill the damaged area, overlaying the filled damaged area with a transitional film having a first side adapted to bond to polyolefins, bonding the transitional film to the polyolefin structure, and applying a reinforcement system over the transitional film. The bonding of the transitional film to the polyolefin structure comprises applying heat to the transitional film. A repair system for repairing a polyolefin structure containing optionally a filler material on the polyolefin structure, a transitional film applied over and bonded to the polyolefin structure having a first side adapted to bond to polyolefins, and a reinforcement system, applied over the transitional film. The reinforcement system contains a fiber-reinforced polyurethane system bonded to the second side of the transitional film.

A pipe binding mechanism, which connects a first pipe and a second pipe, both made of a synthetic resin material, may include: a rubber band which is formed in a ring shape penetrated longitudinally and is made of a flexible material capable of being in close contact with the outer surfaces of the first and second pipes; a tightening plate which is made of an elastic metallic material, formed to wrap connected ends of the first and second pipes in the circumferential direction, and configured for both ends to overlap each other and to wrap the rubber band from the outside; and a pair of pipe binding bands which are respectively arranged at both widthwise ends of the tightening plate and configured to adjust the close contact force relative to the outer surfaces of the first and second pipes.

A pipe binding mechanism, which connects a first pipe and a second pipe, both made of a synthetic resin material, may include: a rubber band which is formed in a ring shape penetrated longitudinally and is made of a flexible material capable of being in close contact with the outer surfaces of the first and second pipes; a tightening plate which is made of an elastic metallic material, formed to wrap connected ends of the first and second pipes in the circumferential direction, and configured for both ends to overlap each other and to wrap the rubber band from the outside; and a pair of pipe binding bands which are respectively arranged at both widthwise ends of the tightening plate and configured to adjust the close contact force relative to the outer surfaces of the first and second pipes.

A pipe binding mechanism, which connects a first pipe and a second pipe, both made of a synthetic resin material, may include: a rubber band which is formed in a ring shape penetrated longitudinally and is made of a flexible material capable of being in close contact with the outer surfaces of the first and second pipes; a tightening plate which is made of an elastic metallic material, formed to wrap connected ends of the first and second pipes in the circumferential direction, and configured for both ends to overlap each other and to wrap the rubber band from the outside; and a pair of pipe binding bands which are respectively arranged at both widthwise ends of the tightening plate and configured to adjust the close contact force relative to the outer surfaces of the first and second pipes.

A pipe binding mechanism, which connects a first pipe and a second pipe, both made of a synthetic resin material, may include: a rubber band which is formed in a ring shape penetrated longitudinally and is made of a flexible material capable of being in close contact with the outer surfaces of the first and second pipes; a tightening plate which is made of an elastic metallic material, formed to wrap connected ends of the first and second pipes in the circumferential direction, and configured for both ends to overlap each other and to wrap the rubber band from the outside; and a pair of pipe binding bands which are respectively arranged at both widthwise ends of the tightening plate and configured to adjust the close contact force relative to the outer surfaces of the first and second pipes.

A method of manufacturing a clamping ring for a cold-expansion joining system includes providing an extruded pipe part made of a cross-linked polymeric material where, while extruding the pipe part, the inner diameter is formed bigger than the outer diameter of a flexible cross-linked polymeric pipe onto which the clamping ring is positioned before making a pipe connection; providing an injection molded annular part having an inner diameter formed smaller than the inner diameter of the extruded part; and bonding the parts together to form a clamping ring having an inward protruding stop edge at one of its ends. The embodiments further relate to a clamping ring formed from an extruded pipe part made of a cross-linked polymeric material and an injection molded annular part bonded together to form a unitary structure including an inward protruding stop edge at one of its ends.