12 inch 325mm ERW Tube Mill Factory High Precision Pipe Suppliers in China

Leading China factory and suppliers of the 12-inch ERW tube mill. This automated high-frequency welding system produces large-diameter round, square, and rectangular steel tubes for oil, gas, and structural applications worldwide.

Product Details

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Product Details

The 12-inch (325mm) ERW Tube Mill is a high-performance industrial solution engineered for the precision production of large-diameter electric resistance welded pipes. Designed to handle diameters from Φ114mm up to Φ325mm, this robust system integrates advanced HF induction welding and a flexible roll tooling system to meet the rigorous demands of structural and industrial pipe manufacturing.

Featuring a fully automated PLC control system with an intuitive HMI touch screen, the line ensures seamless synchronization between the uncoiler, forming mill, and flying saw. Its modular design not only simplifies installation and maintenance but also allows for scalable upgrades, making it an ideal investment for manufacturers targeting high-end export markets requiring strict dimensional accuracy and structural integrity.

Detailed Parameters

Pipe DiameterΦ114mm – Φ325mmWall Thickness3.0mm – 12.0mm
Strip MaterialQ195, Q235, Q345, X42, X52, etc.Strip Width350mm – 1000mm
Forming Speed5 – 20 m/minHF Power400 – 1000 kW
Main Drive Power90 – 160 kWCutting Tolerance±2mm
Total Installed Power800 – 1200 kWDimensional AccuracyWithin ±0.5mm

Key Advantages


Strong Welding Capacity

Equipped with high-power HF induction welding machines, ensuring stable and deep penetration for thick-wall materials.


Rapid Mold Change

Flexible roll tooling system minimizes downtime, allowing fast switching between different pipe diameters and shapes.


High Precision Shaping

The sizing and straightening section corrects axial distortion, delivering superior straightness and ovality.


Automated PLC Control

Centralized HMI touch screen control allows for one-button start, real-time fault alarms, and digital data records.


Versatile Profiling

Integrated Round-to-Square units enable the production of square and rectangular tubes with minimal adjustments.


Modular Scalability

Modular design supports easy installation and seamless integration of future upgrades or remote support modules.

Product Gallery

Management Platforms

Material Handling

Hydraulic Coil Cars and Double-Cone Uncoilers ensure fast loading and automatic decoiling with tension control.

Production Continuity

Shear & Butt Welders combined with Accumulators prevent line stoppage during coil changes.

Quality Assurance

Hydrostatic and Eddy Current testers provide non-destructive inspection for leak and surface defect detection.

Precision Finishing

Pipe End-Facing and Milling machines ensure burr-free ends for seamless flange connection.

Logistics Automation

Automatic Pipe Bundling machines align, count, and wrap finished pipes for efficient transport.

Digital Traceability

Centralized PLC+HMI control enables smart management and digital traceability of every production batch.

Investment Return Comparison

FeatureStandard LineOur Optimized Line
Production DowntimeHigh (Manual Change)Low (Quick Mold System)
Quality Rejection RateModerate (Manual QC)Ultra-Low (Eddy Current/Hydro)
Labor RequirementHigh (Manual Handling)Low (Fully Automated PLC)
Product VersatilitySingle ShapeMulti-Shape (Round/Square)
Market ReachLocal StandardGlobal Export Grade

Frequently Asked Questions

Q: What is the maximum wall thickness the 12-inch ERW Tube Mill can handle?

The system is designed to handle wall thicknesses ranging from 3.0mm up to 12.0mm, supported by high-power HF induction welding for thick-wall stability.

Q: Can this machine produce both round and square pipes?

Yes, by utilizing the Round-to-Square unit in the sizing section and changing the sizing rolls, the line can efficiently switch between round, square, and rectangular profiles.

Q: Which testing equipment is recommended for high-end export markets?

For export-grade quality, we strongly recommend integrating both the Hydrostatic Tester (for leak detection up to 23MPa) and the Eddy Current Tester (for surface and weld defect inspection).

Q: How does the accumulator improve production efficiency?

The accumulator stores a reserve of steel strip, allowing the mill to continue operating while a new coil is being loaded onto the uncoiler, eliminating line stoppages.

Q: What materials are compatible with this tube mill?

The mill is compatible with a wide range of carbon steel grades, including Q195, Q235, Q345, X42, and X52.

Q: Does the system support automated cutting and stacking?

Yes, the line includes a Flying Saw Cutting System for preset length cuts and an Output Conveyor with a Stacker for automatic alignment and discharge.

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