Description

I. Summary

The mill is used to manufacture of round pipe of Φ165mm-Φ325mm with thickness of 4.0- 12.0mm 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}→→Coil car→→ Double-head un-coiler →→Coil peeler →→Pincher and leveler→→Shear and welder→→Horizontal accumulator→→Forming mill→→HF solid state welding→→Cooling→→Burr removing→→Sizing and Turks head→→Cutting saw →→ Run-out table→→ End facing & chamfering→→ Hydrostatic Test→→Ultrasonic Testers—Packing
III. Basic conditions:
a) Steel Pipe Specification
1. Pipe diameter: Φ114mm-Φ325mm
Pipe Thickness: 4.0- 12.0mm
2. Square Pipe: 150X150mm – 250X250mm
Rectangle Pipe: 80X100mm – 200X300mm
Pipe Thickness: 4.0 – 10.0mm
3. Pipe Length: 4-12m
4. Length Tolerance: 0-6mm
5 Line speed: 20-40m/min