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The industrial landscape for ERW (Electric Resistance Welding) tube mill suppliers in China is characterized by a focus on robust engineering and adaptable manufacturing solutions. Shijijiazhuang Faith Machinery Co., Ltd operates within this framework, supplying equipment designed for the continuous production of welded steel pipes. The domestic supply chain is integrated, allowing for the sourcing of high-grade components that contribute to the longevity and consistent performance of these production lines.
A standard ERW tube mill from a Chinese supplier typically encompasses several key stations. The process begins with a decoiling unit, which holds and feeds the steel coil. This is followed by a levelling machine that removes coil curvature and ensures flatness. The strip then proceeds through a cropping and butt-welding section, which joins the tail of one coil to the lead of the next, enabling non-stop operation. The forming section, the heart of the mill, consists of a series of precisely engineered roll stands that gradually shape the flat strip into a cylindrical form. The critical welding station utilizes high-frequency current to heat the edges of the strip to a forging temperature, after which squeeze rolls fuse them together under pressure to create a solid-state weld.
Following welding, the pipe enters a sizing section where a further set of roll stands calibrate the outer diameter to the required tolerance. A cooling system then reduces the temperature of the weld zone, and finally, a flying cut-off saw cuts the continuous pipe into predetermined lengths. Control systems are a crucial aspect, with most modern mills employing Programmable Logic Controllers and Human-Machine Interfaces for operational monitoring and parameter adjustment. Suppliers like Shijiazhuang Faith Machinery design these systems to produce pipes with diameters ranging from approximately 10mm to 660mm and wall thicknesses from 0.5mm to 22mm, catering to a broad spectrum of industrial applications, including structural, fluid transportation, and mechanical uses.
