Wuxi Weishan Environmental Protection Technology Co., Ltd. is a professional manufacturer of stainless steel spiral ducts, covering the full specification range from DN100 to DN2000 with EU CE certification.Wuxi Weishan

 

A stainless steel spiral duct is a circular ventilation duct formed by rolling stainless steel strip into a continuous spiral lock seam. Because it is machine-formed without manual tapping, spiral duct offers high production accuracy, excellent structural rigidity and superior airtightness. Combined with the corrosion resistance of stainless steel, it is the preferred choice for clean, corrosive and high-temperature ventilation systems. This guide covers how stainless steel spiral ducts are made, their key advantages and where to use them.

 

 

Stainless steel spiral duct is produced from metal strip rolled into a spiral groove using advanced spiral lock-forming technology. The strip is continuously formed into a circular pipe on a spiral duct machine, with the spiral seam locked mechanically to create a strong, leak-proof joint.

 

- Full-mechanized production — straight pipes are formed automatically, delivering high efficiency and consistent accuracy.

- No longitudinal seams — the spiral lock construction provides high circumferential strength and rigidity.

- Custom diameters — pipes are produced to required diameters and lengths for each project.

 

The working principle is simple: continuous strip feed + spiral forming + mechanical locking = a thin-walled, leak-proof circular duct with excellent strength-to-weight ratio.Wuxi Weishan

 

 

 

- SS 304 — the standard grade for general corrosion-resistant and hygienic ventilation.

- SS 316L — enhanced corrosion resistance for chemical plants, coastal environments and aggressive applications.

 

 

 

- Excellent corrosion resistance — ideal for humid, corrosive-gas and coastal environments.

- Superior airtightness — spiral lock seams minimize air leakage and improve system efficiency.

- High strength and rigidity — thin walls still provide robust structural performance.

- Smooth interior surface — low friction means lower pressure drop and reduced energy consumption.

- Hygienic and easy to clean — suitable for food, pharmaceutical and cleanroom applications.

- High-temperature capability — stainless steel withstands elevated service temperatures.

- Low maintenance — corrosion resistance reduces rust, leakage and frequent repairs, lowering long-term operating costs.Wuxi Weishan

 

 

 

- Food and beverage processing — hygienic ventilation and material conveying.

- Pharmaceutical manufacturing — cleanroom and process exhaust systems.

- Chemical plants — corrosive fume and gas exhaust.

- Industrial dust collection — handling corrosive or abrasive dust.

- Smoke exhaust systems — fire-safe, high-temperature ducting.

- Coastal and marine environments — corrosion-resistant air handling.

 

Wuxi Weishan's intelligent spiral duct system covers DN100–DN2000 with EU CE certification, serving ventilation projects across 16 countries and regions.Wuxi Weishan

 

 

 

1. Select the right material grade — use 304 for standard service and 316L for aggressive environments.

2. Determine diameter and wall thickness — based on airflow volume and static pressure.

3. Check airtightness — verify leakage class and seam quality.

4. Consider fittings — elbows, reducers, tees and dampers should match the duct system.

5. Verify certifications and testing — CE, ISO and material test reports confirm quality.

 

 

 

Wuxi Weishan Environmental Protection Technology Co., Ltd. combines a 10,000 m² intelligent production base, 40+ advanced machines and senior environmental engineering expertise to deliver high-quality stainless steel spiral ducts with full engineering support.Wuxi Weishan

 

Contact our team today for a customized stainless steel spiral duct solution and quotation.