Apparatus and method for connecting pipes by welding

Metal fusion bonding – Process – Plural joints

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Details

228119, 285 31, 285184, 285286, B23K 3106

Patent

active

040894550

ABSTRACT:
Apparatus and method for connecting by welding two axially spaced apart pipes which may be misaligned relative to each other, including butt welding between the pipe ends a pair of coupling members, each coupling member having a tubular portion and an end portion having a face which lies on a plane which intersects the axis of the tubular portion at a nonperpendicular angle and which describes the circle upon the plane. The faces of the end portions may be abutted, rotated, and welded together such that the axes of the tubular portions thereof intersect at various angles. In one embodiment of the invention, the coupling members are mounted in combination with a pair of tubes, each of the tubes has a radially enlarged ring near one end thereof, which end is butt welded to one of the pipe ends. The coupling members are slidingly mounted over the tubes in telescopic fashion, and fixed upon the tubes by fitting a split sleave over the tube between the ring thereon and the end of the tubular portion of the coupling member, which is then butt welded in place. In an alternate embodiment of the invention, the coupling members are mounted between the pipe ends by butt welding the tubular portions directly to the pipe ends. The apparatus and method of this invention are particularly useful for use in an underwater environment.

REFERENCES:
patent: 1700319 (1929-01-01), Kjekstad
patent: 2209325 (1940-07-01), Dennis
patent: 3186431 (1965-06-01), Moore
patent: 3737179 (1973-06-01), White, Jr.
patent: 3876852 (1975-04-01), Topham

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