FIELD: technological processes.
SUBSTANCE: invention can be used during the stainless steel cladded low carbon low alloy steel pipe production by contact welding. Feeding the steel strip in the pipe length direction, shaping it and perform its edges contact welding. Feeding the protective gas to the areas to be welded through the nozzle outlet, divided into three zones in the open pipe circumferential direction. Gas outlet is located directly above the open pipe welded sections in 5–300 mm above their upper ends. Setting the gas flow velocity B in the said three zones central zone outlet at 0.5–50 m/s, and the gas flow velocity A in the of the two side zones outlet is set from 0.01≤B/A≤10.
EFFECT: after welding, the steel pipe has excellent weld seam characteristics without additional machining and cladding.
6 cl, 6 dwg, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR MANUFACTURING A LONGITUDINALLY WELDED CLAD PIPE | 2021 |
|
RU2775448C1 |
| WELDED STRUCTURES FROM RUSTPROOF ALLOYS IN STRUCTURES AND PIPELINES FROM CARBON STEEL SUSTAINING HIGH AXIAL PLASTIC STRAINS | 2008 |
|
RU2452779C2 |
| METHOD OF HYBRID LASER-ARC WELDING WITH STEEL CLAD PIPES DEPOSITION | 2018 |
|
RU2688350C1 |
| CLAD MATERIAL FOR STEEL SHEET CLADDED WITH STAINLESS STEEL, STEEL SHEET CLADDED WITH STAINLESS STEEL, INCLUDING ITS PRODUCTION METHOD | 2013 |
|
RU2605021C2 |
| METHOD OF MULTILAYER HYBRID LASER-ARC WELDING OF STEEL CLAD PIPES | 2018 |
|
RU2706988C1 |
| RESISTANCE WELDING PROCEDURE FOR PRODUCTION OF ELECTRIC WELDED STEEL PIPE AND ELECTRIC WELDED STEEL PIPE WITH HIGH CONTENT OF Si OR HIGH CONTENT OF Cr | 2008 |
|
RU2429093C2 |
| WELDING METHOD WITH LASER APPLICATION OF METAL, PARTS OBTAINED BY THIS METHOD, AND APPLICATION IN OIL, GAS AND PETROCHEMICAL INDUSTRIES | 2017 |
|
RU2746510C2 |
| METHOD OF WELDING | 0 |
|
SU1797505A3 |
| METHOD FOR WELDING STEEL TUBES WITH CORROSION-RESISTANT COATING | 1998 |
|
RU2155655C2 |
| CLAD SHEET MANUFACTURING METHOD | 2019 |
|
RU2709302C1 |
