Procedure and apparatus for cold joining metallic pipes

Details Procedure and apparatus for cold joining metallic pipes Procedure and apparatus for cold joining metallic pipes

B - Operations, Transporting

23

P

B23P 19/00 (2006.01) B23P 23/00 (2006.01)

Patent

CA 2154638

A method for joining together two metal pipe segments comprises placing the pipe segments in axial alignment with their end faces in close proximity to one another; bridging between the two pipe segments a metal tubular joining sleeve closely fitting to their outer walls adjacent to their end faces; surrounding the tubular sleeve adjacent to both of the end faces with an electrically conductive coil; and applying to the coil a brief electrical pulse to produce a magnetic field to shrink the sleeve onto said pipe segments. An external peripheral groove is formed in the outer wall of each of the pipe segments, and the sleeve overlaps said grooves so as to be pressed into them to increase resistance of the joined pipe segments to axial separation.

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