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
III. Basic conditions:
1. Round Pipe: Φ21.3-Φ60.3mm
Pipe Thickness: 1.6– 4.5mm
2. Square Pipe: 15X15mm –50X50mm
Rectangle Pipe: 10X20mm –60X40mm
Pipe Thickness: 1.6 – 3.5mm
3. Pipe Length: 6.0m – 9.0m
4. Length Tolerance: 0-6mm
b) SteelTape Specification
1. Material: Low Carbon steel
(δb≤500Mpa, δs≤235Mpa)
2. Steel Tape: Inner diameter: Φ470-Φ510mm
Outer diameter: Φmax=1500mm
Strip steel width: 60mm-200mm
Strip steel thickness: 1.6mm-4.5mm
The maximum weight: 3.0 tons
