Device for backing butt-welds between tubes

Details Device for backing butt-welds between tubes Device for backing butt-welds between tubes

B - Operations, Transporting

23

K

78/64

B23K 5/22 (2006.01)

Patent

CA 1044050

ABSTRACT A device used during fusion butt-welding between the ends of tubular members to form a backing for the weld inside the tubular members. The device comprises a thin flexible metal support strip having end portions which are overlapped to provide an arcuate outer peripheral surface which can be changed in cir- cumference, and a mechanism for increasing the peripheral circumference of the support strip. For use, a strip of refractory material is secured on the periphery of the support strip, the device is positioned with the strip of refractory material adjacent the inner surfaces of and bridging the ends of tubular members to be welded, and the mechanism is activated to press the strip of refrac- tory material into engagement with the tubular members.

244143

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