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A steel tube mill is a continuous production line that transforms flat steel strip into welded tubes and pipes through a sequence of roll forming, welding, and sizing operations . The fundamental principle involves progressively shaping the metal and creating a longitudinal weld along the seam. Shijiazhuang Faith Machinery Co., Ltd. designs these mills to handle various materials, including carbon steel, and to produce tubes for a spectrum of industries from construction and automotive to furniture and fitness equipment .
The process within a tube mill follows a logical and continuous flow. It begins with uncoiling and straightening the raw material to ensure a flat strip enters the forming section . The forming process is often described as a "flower arrangement," where each set of rolls in a progressive series adds a specific bend until the strip is shaped into a cylindrical or other tubular form with its edges meeting perfectly for welding .
After the tube is formed, it is welded. The choice of welding technology, such as ERW or HFW, depends on the material and application requirements . The weld seam is immediately cleaned using scarfing tools . The tube then undergoes sizing to achieve precise dimensional tolerances and straightening to ensure its alignment . A flying cut-off saw is used to cut the tube to the required length while the mill continues to run .
The efficiency of a steel tube mill lies in its integrated and automated nature, which allows for high-volume output with consistent quality . Key benefits of using such a mill include the ability to maintain tight dimensional tolerances, the flexibility to produce multiple tube profiles on a single line with quick changeovers, and the overall cost-effectiveness for large-scale production runs . Shijiazhuang Faith Machinery Co., Ltd. focuses on engineering mills that embody these principles of reliability and versatility.
