Method of installing a tube sleeve

Details Method of installing a tube sleeve Method of installing a tube sleeve

1982-12-15

1985-03-19

Hall, Carl E.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573C, 29523, 165173, 165178, 285222, B23P 1526

Patent

active

045050171

ABSTRACT:
A method for installing a close-fitting cylindrical metal sleeve (26) within a tube (14) secured to a tube sheet (12) of a steam generator, comprising the following steps. First, the sleeve is inserted into the tube until an upper portion (28) of the sleeve is above the tube sheet while the lowr portion (30) of the sleeve is within the tube sheet. Next, the upper portion of the sleeve is radially deformed against the adjacent tube wall to form substantially coextensive permanent bulges (32,34) around the circumferences of the sleeve and the tube. The sleeve is then displaced axially, or longitudinally, relative to the tube, such that the bulge in the sleeve produces a wedge-like mechanical interference seal (40) against the tube wall (16'). Finally, the lower portion (30,38) of the sleeve is joined and sealed (42) against the adjacent tube wall (16') to permanently maintain the tight mechanical interference seal at the upper portion of the sleeve.

REFERENCES:
patent: 2290619 (1942-07-01), Rieger
patent: 3208136 (1965-09-01), Joslin
patent: 4069573 (1978-01-01), Rogers, Jr. et al.
patent: 4393564 (1983-07-01), Martin
patent: 4413395 (1983-11-01), Garnier

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