Heat exchanger tube repair

Electric heating – Metal heating – For bonding with pressure

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Details

219 602, 228119, B23K 104

Patent

active

046045120

ABSTRACT:
In the repair of a leaking heat exchanger tube (10) with a repair tube (11) at a braze (12), strain in the exchanger tube (10) is relieved during the brazing operation. Where the exchanger tube is of U-shape both legs (10A and 10B) are treated similarly. Strain relief could also be obtained by a thinning and bulging operation in the exchanger tube at a region which also receives heat from the brazing operation so, on brazing, yield takes place at the bulge.

REFERENCES:
patent: 3118052 (1964-01-01), Lippart et al.
patent: 4283615 (1981-08-01), Vrillon
patent: 4448343 (1984-05-01), Kochka et al.
patent: 4521664 (1985-06-01), Miller
Olds, F. C. "Sleeving Saves Nuclear Steam Generator Tubes", Power Engineering, Dec. 1981, pp. 73-75.

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