High-Frequency Welding Technology of Lsaw Steel Pipe

July 17, 2012

LSAW steel pipe is parallel to the longitudinal weld steel pipe. Production process is simple, high efficiency, low cost, rapid development, which usually divided into metricwelded steel pipe, welding thin-walled tube, transformer cooling tubing.

Straight seam high frequency welded steel pipe technology is relatively simple, rapid continuous production characteristics of a wide range of applications in civil construction, petrochemical, light industry and other sectors. It is used for the transportation of low-pressure fluid, or made into a variety of engineering components and light industrial products.

Straight seam high frequency welded steel pipe production process
Straight seam welded steel pipe is the high-frequency welding unit to the specifications of a long strip of strip rolled into the round tube and straight seam welded steel pipe. The shape of the steel tube can be circular, it can be square or shaped, it depends on the post-weld sizing rolling welded steel materials: low carbon steel and σs of ≤ 300N/mm2 σs of ≤ 500N/mm2 low-alloy steel or other steel products. straight seam steel pipe production of high-frequency welding process: high-frequency straight seam steel pipe welding is the use of AC skin effect and proximity effect, steel (steel) roll forming, the formation of a circular cross-section disconnect the tube in the tube near the induction coil near the center of rotation of one or a group of impedance (magnetic bar), the impedance of the formation of an electromagnetic induction loop with tube openings in the skin effect and proximity role of the effect of the tube openings edge to produce a powerful, centralized thermal effects, so that the weld edge of the rapidly heated to welding the desired temperature by the pressure roller after extrusion, the molten metal crystal indirect co cooling after the formation of a solid butt welds.

High frequency welding
The high frequency welding is based on the principle of electromagnetic induction and exchange charge in the conductor skin effect, proximity effect and eddy current heating effect, so that the weld steel edge of the local heating to the molten state by extrusion of the wheel, so that the butt welds to achieve crystal indirect together to achieve the purpose of the weld. High-frequency welding is an induction welding (or pressure contact welding), it is no need to weld filler, weld spatter, weld forming beautiful narrow heat-affected zone, welding welding good mechanical properties, etc. Therefore, in the production of steel pipes by wide range of applications.

Press Contact:
Hunan Steel Industrial Zone,
Tianxin Special District,
Changsha City,


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