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US 4,205,422 AGranted
Tube repairs
AssigneeYorkshire Imperial Metals Limited
InventorRoy Hardwick
Life of this patent
Estimating the term…
Abstract
A method of repairing a joint between a tube and a tube plate comprising removing an end portion of the tube and replacing it with a connector explosively welded to the tube and the plate.
Claims6
A method of repairing a pre-existing joint between a tube and a tubeplate of a heat exchanger, the tube extending through an aperture in the tubeplate and terminating adjacent to the surface of the tubeplate, comprising the steps of:
- (a) removing part of the length of said tube within the confines of the tubeplate thereby leaving exposed a part of the length of the tubeplate wall defining said aperture;
- (b) locating an open ended tubular metallic repair member within said tube with a part of the length of said member protruding from the tube toward the surface of the tubeplate;
- (c) explosively radially expanding said member so as to form circumferentially continuous welds between the external surface of said member and, respectively, the interior of the tube and said exposed part of the wall defining the aperture in the tubeplate.
Dependencies are inferred from the claim text.