Large-diameter thin-walled steel pipe mill line
Large diameter tube mill is used to produce straight seam welded steel pipes with outer diameters from 114 mm to over 500 mm, widely applied in structural, fluid transport, and construction piping.
Greatwall specializes in high-frequency welded pipe production lines for large-diameter, thin-walled steel pipes. The lines feature advanced control systems, reliable forming technology, and high efficiency, serving the construction, infrastructure, and petrochemical industries.
Each line is customized to customer needs. The pipes have a smooth appearance, high pressure resistance, and reduced weight, helping lower installation and material costs.
Process: loading → unwinding → straightening → clamping and leveling → shearing and welding →Accumulator→ forming, high-frequency extrusion welding, removing external (internal) burrs, weld polishing, weld flaw detection, water cooling, sizing, rough straightening → Saw cutting → conveyor rollers → automatic packaging → marking → inspection and collection → storage
High-Frequency Welding Technology: Stable and precise straight seam welding.
Adjustable Roll Forming: Accommodates a wide range of pipe diameters and thicknesses.
Servo-Controlled Flying Saw: Ensures high-accuracy cutting at full line speed.
Human-Machine Interface (HMI): Intuitive PLC control system for easy operation.
Thin-Wall Compatibility: Suitable for 2.0–6.0 mm wall thickness, optimizing material use.
High Production Speed: Up to 60 m/min depending on configuration.
| Model | Round tube | Tube Thickness | Production Speed | Welding Type |
|---|---|---|---|---|
| ERW180 | 50–180 mm | 1.2–3.0 mm | 15–50 m/min | High Frequency Welding |
| ERW230 | 76–230 mm | 1.8–5.0 mm | 15–50 m/min | High Frequency Welding |
| ERW325 | 114–325 mm | 1.6–5.0 mm | 15–50 m/min | High Frequency Welding |
| Application Area | Common Challenges | Greatwall Solutions |
|---|---|---|
| Construction & Building | Long-length pipe demand, consistent diameter | Continuous forming and HF welding stability |
| Infrastructure Projects | Pressure resistance, installation precision | Stronger weld seams, accurate sizing |
| Fluid Transport | Internal surface smoothness, corrosion risk | Thin-walled precision pipe forming |
| Steel Structure Fabrication | Load-bearing capacity | Thick-wall pipe forming with tight tolerance |
| Piling/Foundations | Pipe strength under heavy load | Uniform welding and OD consistency |
Target Pipe Size Range: Choose a model (e.g., ERW180 / ERW230 / ERW325) based on required OD and wall thickness.
Material Type: Compatible with carbon steel, low-alloy steel, and galvanized strip.
Production Speed: Consider speed requirements for daily output targets.
Factory Space: Greatwall offers layout design assistance based on space constraints.
Automation Level: All models support PLC + touch screen automation with optional remote monitoring.
Founded in 1999, specializes in ERW welded pipe equipment (HG, DLW, LW series)
Top 3 manufacturer in photovoltaic zinc-aluminum-magnesium bracket equipment in China
Serves 20+ provinces in China; partners with leading domestic and international companies
Exports to Saudi Arabia, Russia, USA, India, Egypt, Southeast Asia, and more
30,000+ m² factory with advanced CNC and assembly lines
CE certified with strict quality control
Offers turnkey services: design, manufacturing, installation, training, after-sales
Provides on-site installation, remote support, spare parts, and technical assistance
Product Disaplay
