4inch 114mm Tube Mill - High-Quality Pipe Production Solutions

ERW Carbon Steel Tube Mill

Tube Mill Machine Compose

Cold Roll Forming Machine

Steel Coil Slitting Line

Carbon Steel Coil Slitting Line

Steel Coil Cut To Length Line

Auxiliary Equipment And Spare Parts

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

Product Details

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Product Details

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Product Description

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)

2. Technical Parameters

Item	Specification
Strip Width	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

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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