Cylindrical corrosion barrier for pipe connections
US5547228A · kind A · utility
Inventors
Key dates
| Filing date | Apr 1, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Apr 1, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L13/0227
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A weld connection joining abutted ends of pipe includes a heat limiting sleeve therein which provides a continuous seal to protect the weld and the interior portions of the pipe from the materials passing through the pipe. The sleeve may be configured from a non-metallic material, such as PTFE, and a plurality of seal rings may be located on the outer circumference thereof to seal the sleeve to the interior surface of the pipe. The non-metallic sleeve is inherently non-corrosive, and therefore no secondary protective coatings need be provided on the interior surfaces of the pipe connection to protect the weld. To position the sleeve in the pipe ends, and to properly position the pipe ends for welding, the sleeve includes a plurality of removable spacer pins thereon which are removed from the sleeve before the weld connection is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.