4inch 114mm ERW Tube Mill

This production line utilizes high-frequency induction welding. Steel strips are continuously fed through forming rollers to gradually shape into a round tube. The strip edges are heated by high-frequency current and pressed together by squeeze rollers to form a solid weld seam. The entire process is automated, ensuring high efficiency, precision, and operational stability.

Pipe diameter 25mm to 114mm, Pipe thickness range 1.5mm to 5.0mm







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Описание продукта
 

1. Equipment Composition

      • Decoiler (hydraulic/pneumatic)

      • End Shear & Butt Welder

      • Accumulator/Looper

      • Forming Mill Section

      • High-Frequency Welding Unit

      • Inner and Outer Weld Bead Removal

      • Water Cooling System

      • Sizing and Straightening Section

      • Automatic Flying Cut-Off System

      • Discharge Conveyor and Table

      • Electric Control System (PLC-based)

 

  • Single head uncoiler with peeler and hold down roll
  • shear and welder machine
  • horizontal accumulator
  • Conveyor and run out table
  • 4inch erw tube mill
  • cold flying cutoff pipe

2. Technical Parameters

  • Item Specification
    Ширина полосы 80mm–360mm
    Pipe Diameter 25mm–114mm
    Wall Thickness 1.5mm–5.0mm
    Forming Speed 20–80 m/min (depending on material and wall thickness)
    Welding Method High-Frequency Induction Welding
    Forming Process Round-to-Round or Round-to-Square
    Cutting Options Hot Saw / Cold Saw / Twin Disc Milling Saw
    Control System PLC + Touch Screen (Siemens)
    Main Drive Power 90–160kW (adjustable based on configuration)
  •  
  • 3. Equipment Advantages
  • Wide Specification Range: Suitable for producing multiple pipe diameters and thicknesses.

  • High Weld Quality: Efficient induction welding delivers strong and narrow weld seams.

  • High Automation: Real-time adjustment and diagnostics ensure stable operation.

  • Modular Design: Simplifies maintenance and future upgrades.

  • Energy Efficient: Optimized power control lowers energy consumption.

 

4. Welding Process Overview

  • Utilizes solid-state high-frequency welders, typically 200–500KHz.

  • Magnetic rods or impedance devices help concentrate heat at the weld edges.

  • Optional automatic lifting inner weld bead scraper ensures internal cleanliness.

  • Weld seam is rapidly cooled and straightened post-welding.

 

The Technical Flow of the Production Line
 

 

Steel coil → Uncoiling → Shear & End Welding → Accumulating → Forming → HF Welding → Inner burr removal → Outer burr removal → Cooling → Sizing → Straightening → Cutting → Run-out → Packaging

Read More About tube mill machine

 

5. Packaging and Transportation:

  • Machine modules are film-wrapped and fixed in steel frames.

  • Electrical and hydraulic parts are packed in moisture-proof wooden boxes.

  • Each shipment includes a user manual, wiring diagram, and spare parts list.

  • Export standard compliant with CE, ISO, and customer destination customs requirements.

 

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4inch 114 Tube Rolling Mill FAQS

Weak or Cracked Weld

Adjust power and fine-tune squeeze roll alignment

Inaccurate Cut Length

Replace encoder, calibrate cut-off system

Surface Scratches on Pipe

Clean rollers, inspect and trim strip edge

Misaligned Weld Seam

Recalibrate strip guide and forming axis alignment

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