Method for repairing heat exchanger tubing through partial tube replacement
US6247231A · kind A · utility
8Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1997 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49721
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of repairing a heat exchanger tube in a steam generator includes the step of removing a degraded tube segment from an operative heat exchanger tube in a steam generator. A weld metal ring is then positioned between the operative heat exchanger tube and a new tube segment. The weld metal ring is then welded to the operative heat exchanger tube and the new tube segment to form a linking tube section. The linking tube section is then heat treated. The new tube segment is then expanded toward a steam generator tubesheet. Finally, the new tube segment is welded to the tube sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.