Pipeline system of pipe sections with pre-assembled insulating weld backing rings and method of making same
US12246400B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2018 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Jul 4, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L58/181
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pre-assembled insulated weld backing ring for a tubular section of the pipeline. The weld backing ring includes a metal cylinder and an insulation layer. The metal cylinder has a ring-shaped anterior portion and a ring-shaped raised posterior portion with a step therebetween. The posterior portion has a larger diameter than the anterior portion to define an insulation pocket. The insulation layer is positioned on the external surface of the metal cylinder. The insulation layer is made of an insulated material positioned in the insulation pocket to define a protective barrier to protect the tubular section during welding. The weld backing ring may also include a second metal cylinder positioned on the insulation layer. The weld backing ring may be pre-assembled by applying a tubular metal section material to a sheet of metal and rolling the sheet of metal to form the metal cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.