Process and apparatus for sealing gas lines
US4249577A · kind A · utility
7Cited by
4References
8Claims
0Family size
Inventor
Key dates
| Filing date | Sep 10, 1979 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Sep 10, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/132
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A safe, easy and fast procedure and apparatus for sealing by welded steel plugs branch lines connected to conduits through which gas is flowing, uses a low-carbon steel plug which does not develop cracks on cooling from welding temperature; such plug is arranged to carry a resilient sealing and holding element for locating such plug in place in a cut branch line during welding as well as providing a seal against gas passage during welding. A hard metal die element is provided to properly enlarge and form the cut branch line to accept the plug and resilient sealing and holding element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.