Welding method for sea pipe with high efficiency and comprehensive performance under shaking of pipe-laying ship
US12311481B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2024 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Nov 13, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T70/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a field of welding technology, a welding method for a sea pipe with high efficiency and comprehensive performance under shaking of a pipe-laying ship is specifically disclosed. The welding method is as follows: performing ultra-short arc GMAW all-position welding on the sea pipe within a range of heat input of 0.2 kJ/mm˜0.3 kJ/mm, while setting a peak current, setting a peak current descent rate to 50 A/ms˜70 A/ms, and setting the necking time to 3 ms˜7 ms in the GMAW waveform to 285 A˜370 A. A welding effect of overall low heat input and partial high heat input is formed, and the stability of all-position welding of the sea pipe is guaranteed, which realizes stable welding of the sea pipe under the condition of pipe-laying ship shaking, and improves the fatigue resistance and corrosion resistance of the sea pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.