Pipe coupling and a method of making same

Details Pipe coupling and a method of making same Pipe coupling and a method of making same

F - Mech Eng,Light,Heat,Weapons

16

L

285/4, 285/62

F16L 58/00 (2006.01) F16L 25/03 (2006.01) F16L 47/02 (2006.01)

Patent

CA 1070732

10359 ABSTRACT OF THE DISCLOSURE Two coaxial metal pipes, whose confronting extremities are each provided with a plurality of peripheral ribs of staggered height separated by two or more peripheral grooves, are intercon- nected by a coupling sleeve of fiber-reinforced thermosetting resin subdivided into several coaxially interleaved and independent ly deformable cylindrical shells each terminating in a pair of internal beads engaged in a respective pheripheral pipe groove. The shells, increasing in axial tensile strength from the innermost to the outermost one, are preferably separated from one another by interposed antibonding layers of thermoplastic resin. A resino? filler can be inserted between the pipe extremities for electricall insulating them from each other. The shells of the coupling sleeve can be formed by coiling resin-coated filaments around the pipe axis, advantageously with application of an antifriction layer on each inner shell before the thermosetting material thereof has been fully hardened.

283385

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