Weldable conduit method of forming
US7243409B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 5, 2003 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Jun 13, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49904
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A composite conduit suitable for transporting corrosive and/or erosive fluids including gases, liquids or slurries, is formed by positioning a tube formed of a material having desirable corrosion and/or erosion resistant properties within a pipe formed of a commonly weldable material such that one end of the tube is aligned with one end of the pipe. The tube has an outer diameter slightly less than the inner diameter of the pipe. The tube is affixed to the pipe by connecting the aligned ends thereof, and the pipe is compressed in a reducing operation so that the inner diameter of the pipe is reduced to a diameter that is less than or equal to the outer diameter of the tube. Adjacent, end-to-end sections of the composite conduit are connected using a coupling that employs a cylindrical body formed of the same material as the tubes of the conduits. The coupling body has an outer diameter that is slightly less than the inner diameter of the tubes of the conduits, and preferably an inner diameter that varies to form a taper at each end of the body. The body further contains a circumferential recess intermediate the ends of the body, and a ring formed of the same material as the tubes o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.