Method of repairing or protecting an end of a metal tube in a heat exchanger and sleeve for implementing same
US4960650A · kind A · utility
7Cited by
13References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 15, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Jun 15, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12347
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
To repair a corroded region of the end of a heat exchanger tube, a sleeve is inserted, then expanded into the tube both in the area of the tube sheet and beyond the corroded area, then local welds are made in each of the expanded regions. Thereafter, the end of the sleeve is expanded against the tube in a region inside the tube sheet and above the local weld.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.