Device for centering and clamping tubular parts, comprising means for regulating the gas flow rate in order to control the oxygen content
US9272353B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2006 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to a device for centering and clamping conduits which are preferably made from alloy steel and which are positioned end to end in order to be welded to form a pipeline. The invention comprises: means for centering and clamping two conduits that are to be welded, optional leak-tight partition means which define an inerting chamber at the mating surface, and inert gas distribution means for creating a protective atmosphere at the mating surface. The inventive device also comprises at least means for regulating the flow of inert gas and/or the supply pressure of said inert gas as a function of the concentration of O2 measured in the protective atmosphere and/or the pressure measured within said atmosphere, such as to maintain the O2 content of the atmosphere below a pre-determined alarm threshold value and/or the pressure of the atmosphere below a pre-determined threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.