Tube expansion process

Details Tube expansion process Tube expansion process

B - Operations, Transporting

21

D

26/144

B21D 39/06 (2006.01) B21D 39/20 (2006.01) C21D 7/12 (2006.01)

Patent

CA 1246838

-45- TITLE OF THE INVENTION TUBE EXPANSION PROCESS ABSTRACT OF THE DISCLOSURE A process for the controlled expansion of a conduit against the walls of a circumscribing structure is disclosed herein. The process generally comprises the steps of applying a radially expansive force to the conduit, while monitoring a variable associated with the elastic and plastic properties of the particular conduit being expanded in order to determine a final swaging force which will complete the expansion process. The process of the invention is particularly useful in eliminating the clearance between heat exchanger tubes and baffle plates in a nuclear reactor, and in sleeving operations wherein an internally inserted sleeve is plastically deformed against a heat exchanger tube in order to affect an interference joint therebetween.

470322

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