Description

I. Summary

The mill is used to manufacture of round pipe of Φ25mm-Φ76mm with thickness of 1.0mm-4.0mm 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. Process flow:
{Steel strip}→→ Double-head un-coiler →→Shear and welder→→Horizontal accumulator→→Forming mill→→HF solid state welding→→Cooling→→Burr removing→→Sizing and Turks head→→Cutting saw →→ Run-out table
III. Basic conditions:
a) Steel Pipe Specification
1. Pipe diameter: Φ25mm-Φ76mm
Pipe Thickness: 1.0- 4.0mm
2. Square Pipe: 20X20mm – 60X60mm
Rectangle Pipe:
Pipe Thickness: 1.0– 3.5mm
3. Pipe Length: 4-12m
4. Length Tolerance: 0-6mm
5 Line speed: 30-80m/min