Directly to Square ERW welded Square Pipe Profiles Roll forming welding Line Machine
Directly roll steel strip and form into Square& Rectangle, weld and then turks head to get finished pipes..
1) Compared with round into square& rectangle forming, this way is better for the shape at the corner edge of cross section, pipe inner radius is smaller, and the brim is flat, outlook is good looking.
2) And the whole line load is lower ,especially the load on sizing is lower.
3) The width of steel strip is smaller about 2.4-3% than round into square & rectangle, saving material.
4) It adopts the multi-point bending way, avoid the axial force and side abrasion, reduce the number of forming steps under the same quality, meanwhile it reduce the power wastage and roller abrasion.
5) It adopts the combined type roller on the most of the forming stands, realize that one set of roller can produce dozens of square& rectangle pipes of different dimensions, thus decrease the storage of roller, saving cost about 80% on roller, the roller turnover becomes faster, one new product design time is shorter..
6) The high frequency welding happens on top of square / rectangular pipe top, the same as round pipe welding.
Process of Directly to Square pipe making:
Coil strip loading→ Uncoiling → Straightening end → Flattener →Strip Steel head - tail butt welding→ Accumulator→ Forming → High-frequency induction welding → Removing external burr→ Cooling→ Sizing → Cutting → Out roller table → Checking & Collecting→ Binding→ Weighing → Marking → Accessing Warehouse
mm Pipe Mill Line
Square pipe: 80x80mm-200x200mm
Thickness : 1.5mm-6.0mm
raw materials to make square / rectangular pipes
( Low carbon steel and low alloy steel:δS≤350 Mpa
Steel strip coil: Inner diameter: Φ610mm-720mm
Outer diameter: Φ1300mm-1800mm
Strip steel width: 320mm-800mm
Strip steel thickness: 2.0mm-6.0mm
Max.Coil Weight: 15 Tons
Electric installed capacity:approx.1200KW
Forming speed:Max. 40m/min
Max pipe size,max.thickness, and Max. Speed can't be reached at the same time.
nit operation direction:
Unit operation level:
+ 850 mm
Size of the whole line:approx.100 x 11 m