I.Summary
The mill is intended for manufacturing of round pipe of Φ20mm-Φ50mm with thickness of 0.8-3.0mm 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.Basic conditions
a) Steel Pipe Specification
1. Round Pipe diameter: 20-50mm
Pipe Thickness: 0.8-3.0mm
2. Square & Rectangle Pipe: 20X20-40X40mm
Pipe Thickness: 0.8-2.0mm
3. Pipe Length: 6-12m
4. Length Tolerance: 0-6mm
b) SteelTape Specification
1. Material: Low carbon steel and low alloy steel (σb≤500MPa,σs≤235MPa)
2. Steel Tape:
Strip steel width: 60-160mm
Strip steel thickness: 0.80-3.0mm
Inner diameter: Φ470-510mm
Outer diameter: ΦMax=1500mm
The maximum weight: 1.5 ton
c) Electric installed capacity: appro. 400KW
d) Size of the whole line: appro. 45x5m
e) Line Speed: 30-90m/min
III.The technical flow of the pipe production line
Process Flows:
Uncoiler-Shear and Werlder-Accumulator-Forming-High Frequency Welder-Water cooling-Sizing-Computer Flying Saw-Straightening-End Facer-Hydraulic Test-Package, etc.