Method of making butt welded tubes
US3938724A · kind A · utility
5Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1973 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Jun 29, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K23/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A butt welded tube is provided having excellent properties by the steps of forming a skelp onto a round shape, butt welding the edges thereof with butt welding rolls, blowing oxygen or air into the weld zone, so that said zone is brought to a melted condition with oxidizing heat based on said blowing and some notches which are formed are blown off with said blowing, and then said tube is passed through a train of reducing rolls to obtain a smooth surface and the required dimension of said tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.