Claims
- 1. A method of inserting a sleeve within a damaged heat exchanger tube of a steam generator where the tube entrance is within a chamber accessed through a manway and the geometry of the tube entrance, chamber and manway prevent direct insertion of a straight sleeve into the tube, the steps comprising:
- performing a required length of the sleeve to a curved configuration;
- arranging a tube straightening device within the chamber of the steam generator proximate a tube to be sleeved;
- passing at least a portion of the preformed sleeve through the manway into the chamber;
- placing an end of the preformed sleeve within a straightening device; and
- passing the sleeve through the straightening device to reform the sleeve to a straight configuration and inserting the straightened sleeve into the tube.
- 2. A method of inserting a sleeve in accordance with claim 1 wherein:
- the chamber in which the tube entrance is located has a partial spherical surface and said preforming of the sleeve curves it so it fits entirely within the chamber in one arcuate length.
- 3. A method of inserting a sleeve in accordance with claim 1 wherein:
- the sleeve is preformed into a helical shape that fits within the chamber.
Parent Case Info
This application is a continuation of application Ser. No. 392,979, filed June 28, 1982, now abandoned.
US Referenced Citations (12)
Foreign Referenced Citations (4)
Number |
Date |
Country |
920340 |
Nov 1954 |
DEX |
1118576 |
Jun 1956 |
FRX |
280083 |
Nov 1964 |
NLX |
746765 |
Mar 1956 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
392979 |
Jun 1982 |
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