Electric heating – Metal heating – By arc
Patent
1984-12-26
1986-03-11
Albritton, Clarence L.
Electric heating
Metal heating
By arc
219 61, 219 591, 285286, B23K 3106, B23K 902
Patent
active
045756112
ABSTRACT:
A method of replacing a defective circumferential butt joint in a metal pipe is disclosed. An annular metal bridge ring, having a smaller wall thickness than the pipe but the same inside diameter, is positioned coaxial with the pipe in the relatively wide gap created by the removal of the defective joint. The ring becomes an integral part of the weld by being welded in place, thereby partially filling the gap between the edge surfaces of the pipe exposed by the removal of the defective joint. Subsequent layers of fusible material are weld deposited in place on top of the ring until the gap is filled to the exterior pipe surface. Use of the ring in the gap enables replacement of the defective joint with a single weld.
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Albritton Clarence L.
General Electric Company
James, Jr. Ivor J.
Sigda Catherine M.
Simkins Raymond G.
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