Stainless Steel Spiral Wound Duct
- Round ventilation duct formed by spiral rolling with tightly pressed lock seams
- Good airtightness, high structural strength, and corrosion resistance
- Smooth inner wall and circular cross-section help reduce airflow resistance and system pressure loss
- Available in SUS304, 316, and 316L stainless steel
- Used in shipbuilding, chemical laboratories, food processing plants, airport tunnels, and air purification systems
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Parameter |
Details |
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Manufacturing Process |
Stainless steel strip is fed through a forming machine to create a lock seam profile, then rolled into a circular duct along a spiral path and pressed tightly. The finished seams are even and flat, providing a secure connection. |
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Connection Method |
Precision lock seam connection for wall thicknesses of 0.8–1.2 mm, or electric welding. Compatible with flanges, pipe fittings, and clamp couplings. Sealing rings can be used to help prevent air leakage. |
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Material and Temperature Resistance |
SUS304, 316, and 316L stainless steel. The typical applicable temperature range is -66°C to 149°C. |
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Performance Advantages |
Low airflow resistance helps reduce operating energy consumption. The duct offers high structural strength, reduced low-frequency vibration noise, corrosion resistance, and temperature resistance. Its compact design makes efficient use of available space. Installation time can be reduced to approximately one-third of that required for traditional rectangular ducts. Service life can exceed 25 years under suitable operating conditions. |
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Applications |
Shipbuilding, chemical laboratories, food processing plants, airport tunnels, air purification systems, and industrial process exhaust, smoke extraction, and dust removal systems. |
Also known as a spiral stainless steel duct, the Stainless Steel Spiral Wound Duct is a circular ventilation duct made by spiral rolling and pressing the lock seams along a continuous forming path. It offers good airtightness, high structural strength, and corrosion resistance for industrial and commercial ventilation systems.
The duct is generally made from stainless steel strip. A forming machine creates the lock seam profile before the strip is rolled into a circular shape and pressed tightly. This process produces uniform, flat seams with a secure connection. Depending on the application and wall thickness, the duct can use precision lock seams or electric welding. Lock seam connections are commonly used for wall thicknesses of 0.8–1.2 mm. Flanges, pipe fittings, and clamp couplings are available to suit different installation requirements, while suitable sealing rings help reduce leakage at connections.
The smooth inner wall and circular cross-section help reduce airflow resistance and system pressure loss compared with many traditional rectangular duct configurations. This can improve airflow efficiency and reduce fan energy consumption. Spiral forming and seam reinforcement also improve structural rigidity and pressure resistance. The duct can help limit low-frequency noise caused by vibration, depending on the system design and operating conditions.
Available in SUS304, 316, and 316L stainless steel, the duct can be selected for environments that require resistance to corrosion and certain chemical media. Its typical applicable temperature range is -66°C to 149°C, depending on the material grade, construction, and operating conditions. For confined installation areas, multiple parallel round ducts may take up less space than rectangular ductwork. Flat oval configurations can also be considered where ceiling clearance is limited. Standardized fittings can simplify installation and reduce on-site work, while fewer joints may help limit potential leakage points. With suitable material selection, installation, and maintenance, service life can exceed 25 years.
Common applications include shipbuilding, chemical laboratories, food processing plants, airport tunnels, air purification systems, and industrial process exhaust, smoke extraction, and dust removal systems. The Stainless Steel Spiral Wound Duct can be configured according to the required airflow, installation space, material compatibility, and connection method.
Taizhou Yifan Environmental Protection Equipment Technology Co., Ltd. operates a 19,000-square-meter factory in Taizhou, Zhejiang, with 68 employees. Founded in 1994 as Taizhou Jiaojiang Shunfa Chemical Equipment Factory, the company has more than 30 years of experience in chemical and environmental protection equipment, including ventilation duct applications in shipyards and chemical plants.
OEM and ODM services are available. Products can be manufactured according to customer drawings or prototypes. For each order, the production requirements are confirmed before manufacturing, including duct diameter, wall thickness, connection method, and required accessories. The process includes stainless steel strip inspection, spiral forming and lock seam pressing, fixed-length cutting, end-face finishing, final inspection, and packaging.
Quality checks include lock seam inspection, duct roundness measurement, wall thickness measurement, and airtightness pressure testing, as applicable to the product specifications. Third-party inspection is accepted. The standard warranty period is one year.
The standard production lead time is approximately two months, while customized orders generally require three months. EXW trade terms are available. Products are wrapped in UV-resistant protective film and secured on pallets for transport. Payments in USD and EUR are accepted.
Minimum order amount: RMB 50,000
Standard payment terms: 30% advance payment, with the balance paid before delivery
Customized order payment terms: 50% advance payment, with the balance paid before delivery
To confirm the appropriate duct configuration, please provide the required duct diameter, wall thickness, connection method, and accessory list. Drawings or prototypes are welcome for customized production of the Stainless Steel Spiral Wound Duct.
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