ERW Pipe Making Machine for 70x70-200x200mm Square Tubes

The F200x200 high precision high frequency welded pipe production line is designed to produce square pipes ranging from 70x70-200x200mm with thickness from 4.0-12mm. This production line incorporates innovative design elements from domestic and international equipment, featuring full PC/computer control for advanced technology, convenient operation, and maintenance.

• Rapid roller adjustment system minimizes changeover time between product specifications
• Combined mold system allows production of different tube specifications with adjustments rather than full roller changes (90% roller savings)
• Motorized adjustments reduce tool wear and equipment damage during roll changes
• Composite roll structure changes contact from line to point, reducing wear and extending roll life

• Hot rolled or cold rolled steel strip (meets GB700-88, GB1591-88 standards)
• Yield strength: σs≤345Mpa
• Tensile strength: σb≤560 Mpa
• Thickness: 4.0-12mm (meets GB708-88)
• Steel strip width: 270-800mm (±0.2mm)
• Steel coil inner diameter: Φ508-Φ760mm
• Steel coil outer diameter: Φ1100-Φ2000mm
• Maximum coil weight: 16TON

• Square tube size: 70x70-200x200mm
• Product thickness: 4.0-12mm
• Length: 4-12M
• Speed: 20-40m/min
• Power: 2000KW 380V 50Hz 3 PHASE

1. Raw material (strip) loading
2. Uncoiling
3. Cutting and welding
4. Feeding
5. Material storage
6. Passive leveling
7. Forming rolling
8. High frequency welding
9. Weld burr removal
10. Cooling
11. Sizing
12. Coarse straightening
13. Length cutting
14. Collection

The forming and sizing mill consists of multiple precision components including:

• Feeding roller and automatic centering device
• Passive leveling stand
• Horizontal and vertical roll stands (P1-L3 series)
• Three frame empty curving system
• Welding direction control
• Five roll extrusion system
• Burr removal system
• Cooling system
• Sizing vertical roll stands
• Four roller stands (F1-F4)
• Turks head (C2)
• Electrical control system