Apparatus for flash welding of pipes

Details Apparatus for flash welding of pipes Apparatus for flash welding of pipes

B - Operations, Transporting

21

C

78/48

B21C 37/08 (2006.01) B23K 5/02 (2006.01)

Patent

CA 1167290

AN APPARATUS FOR FLASH WELDING OF PIPES Abstract An internal apparatus for flash welding pipes toge- ther in end to end relationship both under factory condi- tions and in the field, for example in laying trunk pipe- lines, comprises an elongate supporting member carrying an axially movable clamping assembly with electrode jaws for clamping one pipe, an axially immovable clamping assembly with electrode jaws for clamping the other pipe, and a do- ughnut-type welding transformer. The welding transformer is disposed at the side of the axially immovable clamping assembly, which is distant from the joint. The invention consists in that the axially immovable clamping assembly is mounted on the elongate supporting member in a manner to provide an annular clearance therebetween such that there are extending therethrough two coaxial contact tub- es, which are electrically insulated from one another and connect the welding transformer with the electrode jaws, whereby in operation a welding circuit is established.

384494

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