Method of and system for coating a field joint of a pipe
US10215324B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2014 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Feb 5, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/225
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of coating a field joint of a pipeline places at least one body having a thermoplastics material around the field joint. The body is heated in a mold cavity around the field joint to effect thermal expansion of the thermoplastics material. Thermal expansion of the body in the mold cavity is constrained to apply elevated pressure between the body and pipe sections joined at the field joint. The elevated pressure improves bonding and fusing between the body, which forms a field joint coating, and the parent coatings and the exposed pipe sections of the pipe joints. The body need not be fully molten, which reduces the mold residence time including in-mold heating and cooling phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.