I. Summary
The mill is intended for manufacturing of round pipe of Φ10mm-Φ32mm with thickness of 0.4mm–2.0mm 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. The technical flow of the production line
{SteelTape}→→ Double-head un-coiler →→Strip-head Cutter and welder→→
Spiral accumulator→→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 →→Cold saw under computer-control →→ Run-out table
III. Basic conditions:
a) Steel Pipe Specification
1. Pipe diameter: Ø10–Ø32mm
2. Pipe Thickness: 0.4– 2.0mm
3. Pipe Length: 6.0-9.0m
4. Length Tolerance: 0-6mm
b) SteelTape Specification
1. Material: Low Carbon steel
(σb≤500Mpa,σs≤235Mpa)
2. Steel Tape: Inner diameter: Φ470-510mm
Outer diameter: Φmax=1500mm
Strip steel width: 60mm-120mm
Strip steel thickness: 0.4mm-2.0mm
The maximum weight: 1.0 tons
c) Electricity
1. Dynamic power: AC380V±10%, 3phases, 50Hz±1.0%
2. Control Power: AC220V±10%, one phase, 50 Hz ±1.0%
d) Electric installed capacity: appro. 250KW
e) Cooling water
1. Reservoir for High Frequency equipment: 15 m³, one set
2. Reservoir for circulating cooling water: 15 m³, one set
f) Compressed air
1. Pressure: 0.4Mpa
2. Flow: 0.5m3/h
g) Production capacity
Annual output: 10000 ton, according to the yearly working days,daily working hours and the products.
h) Line speed: 30-90m/min
