Spiral Air Duct Welding Machine
Automated spiral duct welding from steel coil to finished pipe in one continuous line.
Heavy-duty spiral duct production line engineered for industrial fabricators requiring thick-gauge steel processing capabilities. Combines continuous arc welding with pneumatic tracking cut-off to eliminate secondary operations while maintaining production speed.
Key Specs
Key Specs
Overview Points
Heavy Steel Processing
Complete Production Line
Tracking Cut-Off
Dual Pipe Molds
Continuous Arc Welding
Industrial Grade Thickness
Reduced Manual Handling
Key Features
Unlike conventional spiral duct machines built for thin-gauge sheet metal, this line processes steel coil from 1.5mm to 2.5mm thick. That capacity opens production to structural spiral pipes, industrial exhaust ducts, and other applications where standard HVAC-grade duct would fail under pressure or abrasion.
The built-in arc welding machine applies a continuous seam weld along the spiral joint as the duct forms. This eliminates the need for a separate welding station downstream, reduces floor space requirements, and ensures consistent weld quality at production speed.
The saw blade tracks the rotating pipe and cuts to length while the line keeps running. Programmable cut lengths from 70–250mm mean short pipe sections and couplings can be produced without manual measurement or line stoppage, improving throughput on repetitive orders.
Two pipe molds are included with the machine, and NTBOBO maintains a library of 300+ mold sets for custom diameter requirements. Changeover between included mold sizes is straightforward, minimizing downtime when switching between product runs.
The package ships as a complete production cell: uncoiler, forming machine, welding unit, cut-off system, two support frames, and pipe loading frame. Every station is engineered to work in sequence, so buyers avoid the integration risk of assembling components from multiple suppliers.
Technical Specifications
| No. | Item | Technical specification |
| 1 | Raw material: | Steel coil |
| 2 | Material plate width: | 130-200mm |
| 3 | Material thickness: | 1.5-2.5mm |
| 4 | Product diameter range: | Ф75mm—Ф400mm |
| 5 | Pipe mold | Include 2 different size mold with this machine. |
| 6 | Cutting types | Pneumatic saw blade tracking cut off |
| 7 | Pipe length | 70-250mm |
| No. | Item | Qty. |
| 1. | Vertical uncoiler | 1 |
| 2. | Arc welding machine | 1 |
| 3. | Forming machine | 1 |
| 4 | Fixing length and cutting machine | 1 |
| 5 | Spiral pipe support frame | 2 |
| 6 | Welded pipe mold | 2 |
| 7 | Pipe loading frame | 1 |
Applications
Industrial ventilation and exhaust duct production
Heavy-duty HVAC spiral duct fabrication
Dust and fume collection system piping
Short spiral pipe sections and couplings for ductwork assemblies
Steel spiral conduit for industrial fluid or air conveyance
Video
FAQ
Spiral Air Duct Welding Machine is widely used in: Industrial ventilation and exhaust duct production; Heavy-duty HVAC spiral duct fabrication; Dust and fume collection system piping; Short spiral pipe sections and couplings for ductwork assemblies.
All NTBOBO machines come with a 1-year warranty from the date of Bill of Lading. Our engineering team provides 24-hour technical support throughout the warranty period.
We accept 30% down payment by T/T (Telegraphic Transfer), with the balance due before shipment. Other payment arrangements can be discussed for long-term partners.
Standard delivery is within 10-35 working days after receiving the down payment, depending on the machine model and customization requirements.
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