FIELD: tube production, possibly manufacture of helical-seam tubes of large diameters for main and intrafield gas and oil pipelines.
SUBSTANCE: line includes stationary and movable butt welding plants for welding by cross seams of two sheets to section and sections one with other; molding-welding mill; plant for welding outer cross seams of tubes. In front of stationary butt-welding plant there is section type apparatus for heating sheet along its whole width. In front of plant for welding outer cross seams there is apparatus for heating tube portions including inner cross seam plus 100-300 mm at each side of it.
EFFECT: improved viscous-plastic properties, enhanced shape of helical seams of tubes, lowered trend to cracking, enhanced operational efficiency and reliability of helical seam tubes.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| LINE FOR MANUFACTURING HELICAL-SEAM TUBES FROM SEPARATE SHEETS | 2006 |
|
RU2308338C1 |
| LINE FOR MANUFACTURING HELICAL-SEAM TUBES FROM SEPARATE SHEETS | 2006 |
|
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|
RU2308337C1 |
| TECHNOLOGICAL LINE FOR MANUFACTURING OF SPIRAL SEAM PIPES OF COIL STOCK | 2006 |
|
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|
RU2320438C2 |
| METHOD OF MAKING HELICAL WELDED TUBES | 2011 |
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| METHOD FOR MANUFACTURING LONGITUDINALLY ELECTRIC-WELDED PIPE OF LARGE DIAMETER | 2022 |
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RU2791999C1 |
| METHOD AND APPARATUS FOR LONGITUDINAL-SEAM WELDING OF PROFILED TUBES IN TUBE-WELDING SYSTEM | 2013 |
|
RU2607885C2 |
| LINE FOR PRODUCING HELICAL SEAM CORRUGATED TUBES | 0 |
|
SU1715535A1 |
| METHOD OF BENDING EDGES OF CONTINUOUSLY MOVING METAL STRIP | 0 |
|
SU673348A1 |
