Title:
METHOD OF INSERTING CYLINDRICAL METALLICSLEEVE INTO TUBE METHOD OF INSERTING CYLINDRICAL METALLIC SLEEVE INTO TUBE
Document Type and Number:
Japanese Patent JPS59117981
Kind Code:
A
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.
Inventors:
GUREN ERUUIN SHIYUKEE
Application Number:
JP23376683A
Publication Date:
July 07, 1984
Filing Date:
December 13, 1983
Export Citation:
Assignee:
COMBUSTION ENG
International Classes:
B21D39/04; F16L5/02; F16L7/00; F16L55/163; F28F19/00; (IPC1-7): F16L7/00
Attorney, Agent or Firm:
Kimura Masami