Pipes for pipelines with heat insulating double casing
US6145547A · kind A · utility
27Cited by
10References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Sep 29, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L59/143
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A line pipe with a double casing is especially used in transporting oil products. In a preferred embodiment, such a pipe is characterized in that, in a sealed annular space, located between an inner tube and an outer tube both coaxially arranged inside each other, there is included a self-sustaining plate made of open pore-microporous material, which is flexible enough to be externally wound around the inner tube. This plate is preferably less in thickness than said annular space such that a passageway is left free between the former and the outer tube whereby low pressure is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.