Dual seam electric resistance welded tubes
US8987627B2 · kind B2 · utility
3Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 2011 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Jan 30, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/0873
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of continuously forming a dual seam welded tubular product includes the steps of providing two coils of sheet metal material, uncoiling the two coils and forming the material into opposing sections, bringing the two opposing sections together at a convergence angle of less than about 4°; and welding the two seams created between the two opposing sections. An apparatus is configured to bring the sections together at a convergence angle less than about 4° to produce the tubular product. The tubular product may have a diameter greater than 26 inches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.