Method of making live gas main insertions
US5062207A · kind A · utility
13Cited by
8References
5Claims
0Family size
Inventors
Key dates
| Filing date | Oct 20, 1989 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Oct 20, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49721
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for inserting a smaller cross sectional area, higher pressure fluid conduit or "main" into a larger cross sectional area, lower pressure fluid main, includes inserting a length of smaller diameter gas main into a length of larger diameter gas main while the larger diameter gas main remains pressurized with the gas. The method includes providing a parallel gas pathway from a section of larger diameter main upstream toward the gas supply from the length of larger diameter main into which the smaller diameter main is to be inserted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.