Forming & Sizing Section

The forming & sizing section is the core of every ERW tube mill line, where flat steel strip is gradually shaped into a round tube and then brought to its final, precise dimensions. Through a series of carefully designed roll stands, the forming unit bends and guides the strip to create a stable open seam ready for high-frequency welding, while minimizing edge strain and ensuring accurate alignment. After welding, the tube passes into the sizing section, where dedicated sizing rolls refine the outer diameter, roundness and straightness, and can also prepare square or rectangular profiles when required. A properly engineered sizing section not only controls dimensions but also relieves residual stresses, resulting in higher-quality tubes and smoother downstream processing. Drawing on more than 30 years of engineering experience in ERW tube mill machinery, SRET designs forming and sizing solutions that match your product range, material grades and production speeds. Each mill stand, roll set and drive is configured for long-term stability, easy adjustment and repeatable accuracy, helping you achieve consistent, high-grade tube production with lower maintenance and downtime.