Want to learn how ERW technology ensures high-quality manufacturing?
Explore the efficiency of ERW pipe mills today!
An ERW pipe mill manufactures high-quality pipes using advanced technology. It efficiently produces pipes by forming hot-rolled coils into cylindrical shapes and welding the seams. Explore the precision and reliability of ERW pipes for your industrial needs today.
Discover reliable solutions for your pipe production needs.
The creation of a precision ERW pipe is a meticulously orchestrated process. Here’s how our advanced ERW pipe mills get the job done:
Uncoiling & Leveling: The journey begins with a large, hot-rolled steel coil. This coil is loaded onto an uncoiler and the steel strip is fed into a leveler to remove any coil-set and ensure it is perfectly flat for the forming process.
Shear and End Welding: To ensure continuous, uninterrupted production, the tail end of one coil is sheared and welded to the leading end of the next coil. This creates a single, endless strip of steel.
Forming Section: The flat strip then enters the forming section. Here, a series of precisely calibrated rollers gradually bend the strip into a circular, open-seam tube. Each roller stand plays a crucial role in shaping the tube to the exact required diameter.
High-Frequency Welding: This is the heart of the ERW process. A high-frequency induction coil or contact tips introduce a powerful electrical current into the edges of the open tube. The current rapidly heats the edges to the welding temperature (over 1200°C). Immediately, a set of squeeze rollers presses the molten edges together, forging them into a permanent, high-integrity seam.
Seam Treatment & Cooling: After welding, any excess material on the exterior and interior of the weld seam (known as flash) is removed by specialized cutting tools to ensure a smooth surface. The pipe then passes through a cooling section where it is sprayed with coolant to lower its temperature and stabilize its metallurgical structure.
Sizing & Straightening: The cooled pipe moves through a sizing section, where another set of rollers ensures the final outside diameter meets exact dimensional tolerances. A straightening machine then guarantees the pipe is perfectly straight.
NDT & Cutting: Finally, every inch of the weld seam is inspected in real-time by Non-Destructive Testing (NDT) equipment, such as an eddy current tester, to detect any potential flaws. Once cleared, a high-speed flying saw cuts the continuous pipe into pre-determined lengths without ever stopping the production line.
Post time: Jun-27-2024
