ERW Tube Mill Lines: HG20-HG610
The HG series high frequency welded pipe unit adopts the roller forming principle to continuously produce straight seam welded pipes. It adopts high frequency induction welding and can produce not only round pipes, but also square and rectangular pipes and special-shaped pipes that do not exceed the processing range of round pipes.
The ERW Tube Mill Line is a continuous, automated industrial system used to produce Electric Resistance Welded (ERW) steel tubes and pipes. The line forms steel strip into a tubular shape and joins the edges using High-Frequency Induction Welding (HFIW) technology. This process ensures efficient, precise, and high-speed tube production, capable of manufacturing round, square, rectangular, and special-shaped tubes within the forming range.
This equipment is supplied by Great Wall. Great Wall’s ERW Tube Mill machines are renowned for their high-precision forming, stable high-frequency welding performance, and fully automated operation. They are widely used in industries such as construction, furniture, automotive manufacturing, and fluid transportation, providing customers with reliable and efficient tube production solutions.
Uncoiling – Steel coils are uncoiled and fed into the production line.
Shear & End Welding – The ends of steel strips are welded together for continuous operation.
Accumulator – Temporarily stores strip material to keep the line running smoothly during coil changes.
Forming – Rollers gradually shape the flat steel strip into a round open tube.
High-Frequency Welding – Tube edges are heated and fused using high-frequency induction.
Bead Removing – Removes internal and external weld beads for a smooth surface.
Cooling – The welded tube is cooled by a water system.
Sizing & Straightening – Adjusts the tube’s diameter and ensures straightness.
Cutting – Tubes are automatically cut to the required length.
Inspection & Packaging – Finished tubes are inspected, bundled, and prepared for delivery.
Wide Range & Flexibility – Produces round, square, rectangular, and special-shaped tubes from φ12mm–φ610mm, suitable for various thicknesses and industries.
High Efficiency – Production speed up to 120 m/min with stable high-frequency welding, ensuring fast and continuous operation.
High Precision & Quality – Advanced roller forming and HF welding deliver accurate dimensions and smooth, strong welds.
Durable & Energy-Saving – Robust structure with optimized power configuration ensures long life and stable performance.
Automation & Easy Operation – Intelligent control systems and optional quick-change setups enhance productivity and convenience.
| Feature | ERW Tube Mill Machine | Seamless Pipe Mill | Stainless Steel Pipe Mill |
|---|---|---|---|
| Forming Method | High-frequency welding | Hot-rolled or drawn | TIG or laser welding |
| Production Cost | Low | Medium | High |
| Material Suitability | Carbon steel, SS | Carbon steel | Stainless steel only |
| Automation Level | High | Medium | High |
| Application Range | Wide | Medium | Narrow |
Parameter Display
| Model | Product specification（mm） | Tube mill speed (m / min) | Total power | High frequency welding machine | Weight | Recommended plant dimension | |||
| Round tube | Thickness (mm) | Square tube | Thickness (mm) | ||||||
| HG50 | φ12～φ50 | 0.5～3.0 | 10X 10～40X 40; 10x20～30x50 | 0.5～2.0 | 20～120 | About 315KVA | 200KW | ≤2T | 50m×18m×Over 6m |
| HG60 | φ15～φ60 | 0.5～3.0 | 15X 15～50X 50; 10x20～40x60 | 0.5～2.0 | 20～120 | About 350KVA | 200KW | ≤2T | 60m×18m×Over 6m |
| HG76 | φ25～φ76 | 0.8～4.0 | 15X15～60X60; 10x20～40x80 | 0.8～3.5 | 20～100 | About 500KVA | 300KW | ≤3T | 70m×18m×Over 6m |
| HG90 | φ32～φ89 | 1.0～4.5 | 25X25～70X70; 20x30～60x80 | 1.0～4.0 | 20～100 | About 500KVA | 300KW | ≤5T | 80m×18m×Over 6m |
| HG114 | φ40～φ114 | 1.5～5.0 | 30X30～90X90; 20x40～80x100 | 1.5～4.5 | 20～80 | About 630KVA | 400KW | ≤8T | 100m×18m×Over 6m |
| HG165 | φ60～φ165 | 2.0～6.0 | 50X50～130X 130; 40x60～120x140 | 2.0～5.5 | 20～65 | About 800KVA | 500KW | ≤10T | 120m×18m×Over 6m |
| HG219 | φ114～φ219 | 2.0～8.0 | 90X 90～170X 170; 80x100～200x140 | 2.0～6.5 | 15～55 | About 1200KVA | 600KW | ≤15T | 140m×24m×Over 8m |
| HG273 | φ114～φ273 | 3.0～10.0 | 90X 90～200X 200; 80x100～150x250 | 3.0～8.0 | 15～45 | About 1500KVA | 800KW | ≤20T | 150m×24m×Over 8m |
| HG325 | φ165～φ325 | 3.0～12.0 | 130X 130～250X 250; 120x140～200x300 | 3.0～10.0 | 15～30 | About 1600KVA | 800KW | ≤25T | 170m×24m×Over 8m |
| HG355 | φ165～φ355 | 4.0～14.0 | 130X 130～280X 280; 120x140～200x350 | 4.0～12.0 | 10～25 | About 2000KVA | 1000KW | ≤30T | 200m×24m×Over 8m |
| HG426 | φ219～φ426 | 4.0～16.0 | 170X 170～300X 300; 140x200～200x400 | 4.0～14.0 | 10～20 | About 2500KVA | 1000KW | ≤32T | 220m×24m×Over 8m |
| HG508 | φ219～φ508 | 4.0～18.0 | 170X 170～400X 400; 140x200～300x500 | 4.0～16.0 | 10～20 | About 3000KVA | 1200KW | ≤35T | 280m×24m×Over 8m |
| HG610 | φ219～φ610 | 4.0～20.0 | 170X 170～500X 500; 140x200～400x600 | 4.0～18.0 | 10～20 | About 3500KVA | 1800KW | ≤40T | 300m×24m×Over 8m |
| Industry | Application Area | Models Used | How the Machine Solves Key Problems |
|---|---|---|---|
| Construction Industry | Scaffolding tubes, structural pipes | HG89, HG165 | Ensures high-strength welding with consistent wall thickness for load-bearing structures. |
| Furniture Industry | Round and square tubes for furniture frames | HG32, HG50 | Provides accurate forming and smooth surfaces for decorative and structural furniture use. |
| Automotive Industry | Crash structure tubes, chassis tubes | HG76, HG114 | Delivers reliable seam quality for safety-critical components; compatible with automation lines. |
| Agricultural Machinery | Frame and boom tubes for machinery | HG114, HG165 | Withstands heavy vibration and torsion through precision welding and stable tube geometry. |
| Oil & Gas Sector | Low-pressure fluid and gas pipes | HG273–HG508 | Enables leak-proof seam welding in continuous production for pipeline systems at lower cost. |
| Mechanical Engineering | Equipment frames, processing line supports | HG165–HG325 | Allows for flexible dimensions and high tolerance accuracy in modular equipment manufacturing. |
| Problem Area | Great Wall Solution |
|---|---|
| Inconsistent welding quality in manual processes | High-frequency induction welding ensures uniform, stable seams across the entire tube length. |
| Low production efficiency | Great Wall lines offer speeds up to 120 m/min, significantly improving daily output. |
| Time loss in size changeover | Automatic/semi-automatic mold change options enable fast format switches to minimize downtime. |
| Excessive material waste | Advanced forming systems and precise dimension control reduce scrap rates and save raw material. |
| High energy consumption | Integrated energy-saving systems and efficient HF generators lower overall operational costs. |
| Rigid machine configurations | Fully customizable machines with add-ons like servo cutting, auto-stacking, and online testing. |
Product Disaplay
