I. Summary The mill is intended for manufacturing of round pipe of 21.3mm-Φ60.3mm with thickness of 1.6mm–4.5mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank with its subsequent welding into tube, edge heating by means of solid state high-frequency welder, longitudinal seam welding in rolls of tube welding machine, cooling, further sizing or shaping and on-stream cutting of endless tube in measured lengths. Finished product will be of round, square or rectangular pipe. II. The technical flow of the production line {SteelTape}→→ Double-head un-coiler →→Strip-head Cutter and welder→→ Cage Loop→→Forming section（Flattening unit +Main driving unit +Forming unit +Guide unit +High frequency induction welding unit +squeeze roller）+ De-burr frame →→Cooling unit →→ Sizing unit and straightener →→Flying saw under computer-control →→ Run-out table→→ painted