8 Inch ERW Tube Mill

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

10inch 273mm ERW Pipe Making Machine

The 10-inch ERW tube mill is designed for continuous and automated production of medium to large-diameter welded steel pipes. It transforms steel strips into round pipes through forming, high-frequency welding, sizing, and cutting processes. The equipment is highly efficient, reliable, and suitable for high-strength, high-precision steel pipe manufacturing. Applicable pipe types include: structural pipes, fluid pipes, pressure pipes, pile pipes, and general-purpose steel tubes.

Product Details

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Product Details

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Product Description

Applicable pipe types include: structural pipes, fluid pipes, pressure pipes, pile pipes, and general-purpose steel tubes.

List of Equipment Supply

No.	Equipment Name	Description
1	Hydraulic Uncoiler Car	Transfers steel coils to the decoiler
2	Double-cone Hydraulic Decoiler	Automatically uncoils and holds coils (up to 15 tons)
3	Shear & Butt Welder	Joins the ends of two coils for continuous feeding
4	Accumulator (Horizontal)	Maintains tension and buffering during continuous operation
5	Forming Mill (Rough/Mid/Finishing)	Gradually bends the strip into round shape
6	High-Frequency Welding Unit	Solid-state or IGBT system with auto load matching
7	Inner/Outer Burr Removers	Trims internal and external weld seams for smooth pipe surface
8	Cooling Section	Adjustable water spray zones for weld and pipe body cooling
9	Sizing Mill	Ensures precise outer diameter and roundness of pipes
10	Flying Saw (Hot/Milling)	Servo-controlled cutting to length with anti-vibration mechanism
11	Output Conveyor & Stacker	Aligns, stacks, and prepares pipes for packaging
12	Electrical Control System	Centralized PLC+HMI interface, with real-time monitoring
13	Hydraulic & Lubrication Unit	Powers the system with automated oil pressure and temperature control

2. BASIC DESIGN DATA

Design of the proposed line is based on following specification:

Item	Value
Pipe Diameter Range	Φ114mm – Φ273mm
Wall Thickness	3.0mm – 10.0mm
Strip Width Range	360mm – 870mm
Strip Strength	Q195 – Q345B or ≤600MPa
Production Speed	10–30 m/min
Power Supply	380V / 50Hz / 3Ph (customizable)
HF Welding Power	300 – 600 kW (depends on thickness)
Welding Method	Solid-state high-frequency induction
Cutting Type	Hot flying saw / Cold saw (servo-based)
Length Tolerance	±3mm
Operator Requirement	4–6 persons per shift
Line Footprint	Approx. 70m × 6m

Equipment Advantages

Stable Construction: Heavy-duty welded frame ensures long-term durability
Intelligent Control: Full PLC control with alarms, diagnostics, and remote support
Quick Changeover: Supports multiple profiles (round, square, rectangular)
Excellent Weld Quality: Precision-matched HF system ensures solid welds
Energy Efficient: Inverter-controlled drives reduce power consumption by over 20%
Modular Design: Optional upgrades for stackers, cutting units, inspection systems

Welding Principle

Using high-frequency induction heating, the strip edges are rapidly heated to a plastic state, then squeezed together by pressure rollers to form a continuous weld.

Advantages: Smooth weld seam, small heat-affected zone, no filler material needed
Key Parameters: HF power adjustment, coil alignment, squeeze pressure
Burr Removal: Optional internal and external scarfing improves final product finish

Operating Procedure

Ensure all systems (electric, hydraulic, water) are operational
Load coil → Shear & weld → Accumulate strip → Forming & welding → Cooling → Sizing → Cutting
Check roll wear, blade sharpness, and induction coil daily
Monitor welding temperature, strip tension, and sizing output via HMI
Shutdown sequence: stop line → cut power → close water/air systems in order

The Flow of the Production Line

{Steel Tape}→Coil car→ Uncoiler →Peeler and hold down roll→Flattener→ Strip-head Cutter and welder→Spiral accumulator→Forming section（Flattening unit +Main driving unit +Forming unit +Guide unit +squeeze roller）+ De-burr frame →→Cooling unit →→ Sizing unit and straightener →→Cutoff saw →→ Run-out table →→Straingtener machine →→Chamfer machine →→Hydro tester machine →→automatic package machine

tube making process

Selection Advice for Customers

- Define main product specs (e.g., Φ168, Φ219) when configuring forming stations
- Wall thickness range determines required HF power and saw type
- Export customers should specify voltage, control language, and certification needs (e.g., CE)
- Optional upgrades: online seam inspection, laser OD measurement, automatic stacking systems

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10inch ERW tube Mill FAQs

Pipe out-of-round

Check whether the unwinding tension is balanced and confirm that the guide mechanism and the loop tension control device are operating normally.

Incomplete weld or slag

Low HF power or oxidized strip edges, Increase power, clean strip edges

Inaccurate cutting length

Servo system misalignment, Re-calibrate saw axis and encoder

Excessive burr

Worn scarfing blade or low pressure, Replace blade, increase pressure

Uneven pipe stacking

Conveyor sync issue or limiter fault,Adjust transfer and stopper units

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