Corrosion-resistant pipe coupling structures
US4509776A · kind A · utility
38Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1982 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Mar 16, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L58/182
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A corrosion-resistant pipe coupling made of carbon steel has on its inner surface an intermediate annular projection directed radially inward. At least an innermost part of the annular projection is formed or corrosion-resistant material such as stainless steel. The annular projection is covered by a corrosion-resistant annular member or which is secured by friction welding, electron beam welding, an adhesive or mechanical engagement. The annular member prevents corrosion of the coupling by corrosive fluids flowing in pipes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.