Heat-insulated pipe and manufacturing method
US6530137B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1999 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Nov 15, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49982
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is intended for the thermal insulation of a flexible pipe. The method includes a first step of depositing a thickness of extrudable and rigid insulating material on an outer surface of the pipe, with the pipe moving longitudinally. The insulating material is cooled over a substantially rectilinear part downstream from the deposition area. Then, at least one circumferential slot is formed in the thickness of the rigid insulating material so as to restore flexibility of the pipe coated with the rigid insulating material. The thus-formed pipe includes a flexible inner pipe, a layer of rigid insulating material surrounding the flexible pipe, and at least one circumferential slot cut in the layer of rigid insulating material to allow flex of the heated insulated pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.