Joining of metallic pipe lined with thermoplastic polymer
US5348211A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1992 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Dec 3, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49428
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of joining two sections of metallic pipe (1), each of which has a thermoplastic polymer lining (3), to form corrosion resistant joints is disclosed. The method comprises inserting a sleeve (10) into each section of two pipes (1) that are to be joined so as to form a fluid tight seal between the liner (3) and the sleeve (10). The end of each section of pipe is then bevelled, and the two sections are welded together so as to form a corrosion resistant weld between each section of pipe and each sleeve and between each of the sleeves. The method is particularly useful in the lining of metallic pipe in the field e.g. in pipelines, without having to form flange joints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.