Methods of joining or repairing lined pipes and associated apparatus
US11739876B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2017 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Nov 16, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/22
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of creating a weld between a liner of a section of lined pipe and an electrofusion fitting. The fitting comprises at least one heating element, which is suitably disposed on or in an outer surface of the electrofusion fitting and is electrically isolated from an inner surface of the fitting. The method comprises locating an end of the electrofusion fitting within an end of the section of lined pipe, locating an induction coil within a bore of the electrofusion fitting in the vicinity of the at least one heating element, and supplying electrical power to the induction coil to energise the at least one heating element by electromagnetic induction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.