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Hengyang Valin, China, to produce all tube sizes
Jun 24, 2011
At the Hunan works of the Chinese tube producer, Hengyang Valin Steel Tube, erection has started of the finishing mill supplied by SMS Meer, Germany. This will enable Hengyang to serve the seamless tube market with all tube sizes. The mill is designed for an annual capacity of 500,000 t of seamless tubes in diameters up to 180 mm
The engineering for the complete plant comes from SMS Meer. The core elements such as the finishing mill were manufactured in the Mönchengladbach workshop. Other plant components will be supplied by SMS Meer China, such as an extracting mill and a stretch-reducing mill together with the structural components of the mill stands and stand changing equipment.
Project Manager Matthias Terhart (SMS Meer): “We have been a partner of Hengyang for decades. In the 90s we erected a line for tubes in the lower size range, and in 2005 a further seamless tube plant was added for larger dimensions. Hengyang can now produce all sizes of seamless tubes.”
The three rolls of the finishing mill are positioned uniformly around the tube. As a result, the forces acting on the tube are distributed more uniformly around the circumference than with the conventional 2-roll arrangement. The benefits of this process are reduced tolerance deviations in the roll gap, less material stress and fewer disruptive influences during the rolling process. For tube mill operators such as Hengyang this means that tube production runs in a more stable manner and is easier to master.
The lower material stress makes it possible for the product range to be extended to thin-walled dimensions and higher steel grades.
The line is expected to commence production as early as autumn this year. With the new tube mill, Hengyang will increase its total seamless tube production to 2 million t.
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Hengyang Valin, China, to produce all tube sizes
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