What is a High Frequency ERW Tube/Pipe Mill?
A High Frequency ERW Tube/Pipe Mill is a continuous production line that uses High Frequency Induction/Contact Welding technology to manufacture steel pipes from steel coils/strips into round pipes, square tubes, rectangular tubes, and certain special-shaped profiles.
This equipment is a standard configuration in modern pipe manufacturing and is widely used in ERW steel pipe production lines, ERW tube making machines, and high-frequency welded pipe mill applications.
I. Working Principle
The High Frequency ERW Tube Mill adopts an integrated process of continuous roll forming and high-frequency welding.
Process Flow:
Steel Coil
→ Uncoiler
→ Straightener / Leveler (Optional)
→ Shear & End Welder
→ Accumulator
→ Forming Section (Multi-stand Roll Forming)
→ High Frequency Welding
→ Internal & External Weld Seam Removal
→ Cooling System
→ Sizing Mill
→ Flying Saw Cutting
→ Run-out Table
Welding Principle:
High-frequency current is used to rapidly heat the edges of the steel strip to welding temperature. Under squeeze pressure from forming rolls, a solid-state weld is formed, enabling continuous welding production.
II. Key Features
1. Continuous Production Capability
Supports non-stop production
Equipped with accumulator to reduce downtime
Suitable for long-term mass production
Typical production speed:
30–120 m/min (standard configuration)
120–150 m/min (high-speed configuration)
2. High Frequency Welding System
Solid-state or induction-type HF power supply
Concentrated welding energy
Small heat-affected zone
Stable and consistent weld quality
3. Forming Accuracy Control
Multi-stand progressive roll forming
Quick-change roll design
Controlled roundness, straightness, and ovality
4. PLC Automatic Control System
Centralized PLC control for the entire line
Pre-set production parameters
Automatic speed synchronization
HMI touchscreen operation interface
5. Applicable Tube Types
Round pipe
Square tube
Rectangular tube
Custom profile tube
III. Main Machine Units
Hydraulic Uncoiler
Strip Shear & Butt Welder
Accumulator (Spiral or Cage Type)
Forming Mill
Guide Section
High Frequency Welder
Weld Seam Scraper
Cooling System
Sizing Mill
Flying Saw
Run-out Table
Hydraulic Stacker (Optional)
IV. Technical Range
Outer Diameter (OD): Φ10 – Φ219 mm (customizable larger sizes available)
Wall Thickness: 0.3 – 8 mm
Material: Q195 / Q235 / Q345 / Carbon Steel / Low Alloy Steel
Welding Type: HF Induction / HF Contact Welding
Forming Method: Roll Forming (Progressive Bending)
V. Comparison with Standard ERW Tube Mill
| Item | High Frequency ERW Tube Mill | Standard ERW Tube Mill |
|---|---|---|
| Welding Method | High Frequency Resistance Welding | Low-frequency / Conventional ERW |
| Production Speed | High-speed continuous production | Lower speed |
| Weld Quality | Stable, small heat-affected zone | Less stable |
| Automation | Full PLC control | Semi-automatic / basic control |
| Application | Industrial mass production | Small-scale production |
VI. Industry Applications
The High Frequency ERW Tube/Pipe Mill is mainly used for structural and industrial pipe production across multiple sectors:
1. Construction & Structural Steel
Keywords: steel structure tube / scaffolding pipe / construction pipe mill
Structural steel support tubes
Scaffolding pipes
Building frame structures
Fencing and railing systems
Greenhouse structural tubes
Characteristics:
High-volume production demand
Cost-sensitive applications
Standardized specifications
2. Fluid Transportation Systems
Keywords: water pipe making machine / gas pipe mill / fluid pipe line
Low-pressure water pipes
Industrial water transport pipes
HVAC duct pipes
Low-pressure gas pipes
Cooling system pipelines
Characteristics:
High sealing requirements
Strict dimensional consistency
Long-distance transportation use
3. Automotive Industry
Keywords: automotive tube mill / car pipe making machine
Automotive chassis tubes
Crash tubes
Exhaust system pipes
Seat frame tubes
Transmission structure tubes
Characteristics:
High strength requirements
High dimensional accuracy
High surface quality requirements
4. Furniture & Decoration
Keywords: furniture tube mill / decorative pipe machine
Metal furniture frames
Table and chair structures
Display racks and shelving systems
Commercial display structures
Characteristics:
Thin-wall tube production
High surface finish requirements
Appearance consistency is critical
5. Machinery & Equipment Manufacturing
Keywords: industrial tube mill / machinery pipe line
Equipment support structures
Conveyor system components
Agricultural machinery parts
Automation equipment frames
6. Energy & Renewable Structures
Keywords: solar mounting tube mill / energy pipe production line
Solar mounting structures
Wind power support structures
Power transmission frameworks
Electrical conduit pipes
7. Agriculture & Infrastructure
Keywords: greenhouse pipe mill / irrigation pipe machine
Irrigation pipeline systems
Greenhouse structural frames
Livestock fencing systems
Water conservancy pipelines
8. Municipal Engineering
Keywords: municipal pipe mill / infrastructure tube line
Municipal water supply and drainage pipes
Highway guardrail systems
Bridge auxiliary structures
Urban utility tunnel supports
VII. Foshan ST Machineries Equipment Advantages
Based on industry-standard configurations of manufacturers such as Foshan ST Machineries, the following advantages are commonly highlighted for buyers of High Frequency ERW Tube/Pipe Mills:
1. Turnkey Tube Mill Solution Capability
Complete ERW tube production line solutions
Integrated design from uncoiling to cutting
Layout customization according to factory space
Keywords:
ERW pipe mill turnkey project / tube mill plant solution
2. Stable Forming System
Multi-stand progressive roll forming
Reduced internal stress on steel strip
Stable long-term operation
Suitable for 24/7 continuous production
3. Efficient High Frequency Welding System
Solid-state HF power supply (energy-saving type)
Automatic adjustment based on tube size
Stable and consistent weld quality
Quick changeover for different thicknesses
Keywords: HF welded pipe mill machine
4. Precision & Product Consistency
Optional online dimensional control system
High-precision sizing adjustment
Stable OD and roundness control
Reduced scrap rate
5. Automation & Ease of Operation
Centralized PLC control system
One-button start/stop operation
Parameter memory function
Reduced dependence on operator experience
6. Customization Capability
Typical customization options include:
Different production capacities (30–120 m/min+)
Various diameter ranges (small to large tubes)
Quick-change square/rectangular tube systems
Factory layout customization
7. Export-Oriented Design
Complies with international electrical standards (CE/ISO design principles)
Overseas installation and commissioning support
English HMI interface
Global technical service support
8. Cost and Efficiency Balance Design
Optimized energy consumption system
Reduced production cost per ton
Improved material utilization
Suitable for large-scale industrial investment
VIII. SEO Keyword List
high frequency ERW tube mill manufacturer
ERW pipe making machine supplier China
steel tube production line for sale
HF welded pipe mill machine
square tube making machine line
automatic ERW pipe mill plant
industrial pipe manufacturing machine
carbon steel pipe mill equipment
tube mill factory China ST Machineries
Summary (Industrial Definition)
A High Frequency ERW Tube/Pipe Mill is an industrial production line for continuous steel pipe manufacturing. Its core systems include the forming unit, high frequency welding system, and sizing & cutting system, covering a wide range of structural and industrial pipe applications.
