Method of thermally insulating coaxial pipes with a particulate insulating material
US7938148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2005 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Sep 7, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L59/143
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of thermally insulating the annular space in an element of an assembly of two coaxial pipes, the space being filled with a porous thermally insulating material, under low absolute gas pressure in which method the following steps are performed: a) the pipe element is inclined, preferably at an angle α of 5° to 30°, the annular space being closed at each end by respective closure pieces; and b) substantially all of the annular space is filled with the insulating material in the form of particles in bulk; and c) preferably said particles of insulating material are shaken, at least intermittently, as the annular space is filled in order to compact the insulating material, the annular space being maintained under high vacuum during filling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.