Method of repairing or protecting an end of a metal tube in a heat exchanger and sleeve for implementing same
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United States of America Patent
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Oct 2, 1990
Issued Date -
N/A
app pub date -
Jun 15, 1989
filing date -
Nov 21, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To repair a corroded region of the end of a heat exchanger tube, a sleeve is inserted, then expanded into the tube both in the area of the tube sheet and beyond the corroded area, then local welds are made in each of the expanded regions. Thereafter, the end of the sleeve is expanded against the tube in a region inside the tube sheet and above the local weld.
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