Method of lining of metallic pipe using a plurality of concentric flexible tubes of thermoplastic polymer
US5180458A · kind A · utility
15Cited by
12References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1991 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Apr 26, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of lining of metallic pipe is disclosed. The method comprises forming a plurality of concentric flexible tubes of a thermoplastic polymer, such tubes being capable of being bonded together under the influence of heat and pressure. The plurality of concentric tubes is inserted into a section of metallic pipe that is to be lined. The tubes are then heated, especially under pressure e.g. using steam, to cause the tubes to bond together to form a single tube lining the pipe. Adhesives may be used to facilitate bonding. The method is particularly useful in the lining of metallic pipe that has bends, loops or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.