Features of Aosun Acoustic Spiral ducting
- The integrated structure significantly reduces the air duct gaps, making it has a low air leakage rate.
- The standardized size design is compatible with conventional HVAC air ducts. Its structure is lightweight and convenient for installation.
- Galvanized steel and stainless steel materials can effectively resist oxidation and rust, and it has excellent corrosion resistance.
- The specifications cover various sizes ranging from small household ventilation systems to large industrial ventilation systems.
- Aosun provides ODM/OEM customization services to meet your diverse needs.
Aosun | Professional Spiral Ducting Manufacturer in China
Aosun is a leading Chinese manufacturer of spiral ducting. Our spiral ducting is widely used in HVAC systems and various industrial and commercial ventilation systems. It features high strength, low air leakage, low wind resistance and high airtightness, delivering stable and efficient airflow while reducing energy consumption and improving overall system efficiency. Our spiral ducting is made of high-quality galvanized steel, stainless steel or aluminum. It has excellent durability, corrosion resistance and long service life. Moreover, its rigid round structure and standard fittings make installation fast and efficient, especially suitable for large-scale and long-distance pipeline layout. The diameter of the spiral ducting we produce ranges from 80mm to 2000mm, supporting customized sizes to meet various ventilation requirements. It is suitable for commercial buildings, factories, warehouses, restaurants, hospitals, shopping malls and other public places. In addition, our spiral ducting has passed international certifications such as CE, ISO, RoHS , which ensures that every product you purchase is of high quality and reliable performance.
It is the most commonly used hard pipe in HVAC systems, which is rust-proof and has high strength.
It is resistant to corrosion and high temperatures, does not rust. It is suitable for use in high-humidity environments.
It is lightweight, which has excellent corrosion resistance. It is suitable for coastal projects and lightweight ventilation systems.
What is Spiral Ducting?
The spiral air duct is a type of circular metal rigid duct used in HVAC ventilation systems. It adopts spiral lock seam design, which has the characteristics of high strength, high air tightness and low wind resistance. It is commonly used in various ventilation and exhaust systems. Moreover, it is suitable for various scenarios such as industry, commerce, and agriculture.
Spiral Ducting Specifications
All Aosun spiral ducts are produced in strict accordance with international industry standards, and they has complete parameters. The following detailed specification table covers all standard and customized models, providing accurate data support for project design, procurement, and construction.
| Model | Material | Diameter(mm) | Standard length | Thickness(mm) |
| Sd100 | Galvanized steel | 80–1000 | 10m/customizable | 0.5/0.6/0.8/1.0/1.2 |
| Sd200 | Stainless steel | 80–1000 | 10m/customizable | 0.5/0.6/0.8/1.0/1.2 |
| Sd300 | Aluminum spiral duct | 80–1000 | 10m/customizable | 0.5/0.6/0.8/1.0/1.2 |
Application of Spiral Ducting
Commercial Building HVAC System
Office buildings, shopping malls, supermarkets and hotel spaces have large spaces and continuous ventilation requirements. There are high demands for the aesthetic appearance and low noise of the ducts. Spiral pipes have smooth airflow, a neat appearance (suitable for installation on bare ceiling panels), and stable operation, which effectively solve the problems of uneven air supply and chaotic duct layout in commercial spaces.
Industry Ventilation
Factories, warehouses, workshops have the demand for large air volume exhaust, dust removal and air circulation. The high strength and high air tightness of spiral pipes can withstand long-term and high-load operation, which effectively solve problems such as industrial dust accumulation, high temperature and turbid air. In addition, it can improve the working environment of the workshop.
Restaurants and Commercial Kitchens Ventilation
Commercial kitchens have a large amount of smoke and high-temperature exhaust gas emissions, which can cause corrosion to ordinary pipes. However, galvanized steel and stainless steel spiral pipes have excellent oil resistance and corrosion resistance. Their smooth inner walls do not easily accumulate oil, thus it can reduce the frequency of cleaning and avoiding pipe blockages.
Dust Collection System
Woodworking and industrial dust removal projects require duct with strong pressure resistance and low dust accumulation. The smooth inner wall of the spiral pipe and its high structural strength can accommodate long-term dust transportation, prevent pipe blockage, and ensure stable dust collection effect.
Spiral Duct vs Rectangular Duct
In the HVAC ventilation engineering, spiral duct and rectangular duct are the two most mainstream types of ducts. Through comprehensive comparison from multiple perspectives, spiral duct has obvious advantages in terms of efficiency, cost and construction. It has become the preferred solution for modern high-quality ventilation projects.
Airflow Efficiency
Spiral pipes have a circular structure with a smooth inner wall, featuring low air flow resistance, small pressure loss and high ventilation efficiency.
Rectangular ducts create turbulence at sharp corners. It is easy to produce airflow disorder, high wind resistance, high pressure loss, and low efficiency.
Air Tightness Performance
The spiral duct has a tight spiral lock seam design, seamless connection and low air leakage rate.
Rectangular air duct is mostly welded by plate, with more welds and poor sealing. It is easy to leak and cause the energy consumption of the fan to rise.
Cost
The spiral duct has low installation and maintenance costs, low energy consumption, and high long-term cost effectiveness.
The rectangular duct construction is costly. It requires frequent maintenance and has high maintenance costs in the later stage.
Installation Efficiency
Spiral ducts have standardized finished products and are easy to connect to the fan. The on-site installation is quick and the construction period is short.
Rectangular ducts require on-site cutting and splicing, which leads to complex construction process , the long construction period , and the high labor cost.
How to Choose the Right Spiral Ducting？
For purchasers, contractors and project designers, making the right choice of spiral ducts is crucial for ensuring the ventilation effect of the project and controlling costs. We have summarized the following selection dimensions to help you quickly match the most suitable spiral ducts for your project.
Air Volume Requirement
The diameter and thickness of the air ducts are determined based on the required supply and exhaust air volumes for the project. When choosing, you should avoid choosing a diameter that is too large, which leads to space waste, or a diameter that is too small, resulting in insufficient airflow and excessive loss of air pressure. Industrial ventilation and dust removal projects in large spaces require large-diameter and thickened air ducts, while commercial fresh air systems can choose regular small and medium-sized specifications.
Usage Environment
For regular indoor commercial scenarios, you can choose cost-effective galvanized steel ducts. For high humidity, chemical corrosion, food and pharmaceutical environments, stainless steel ducts should be selected. In coastal salt spray environments, aluminum or aluminum-zinc coated ducts are more suitable.
Personalized Requirements
For hospitals, schools and office buildings with high noise requirements, spiral ducts with sound-absorbing layers should be selected to reduce the noise of air flow in the pipes. For central air conditioning systems that need to convey hot and cold air, you can choose to add insulation layers in the spiral ducts to prevent the formation of condensate water and heat loss.
Why Choose Aosun Spiral Ducting?
Strong Production Capacity
We have an advanced production facility with more than 100 automation equipment and multiple efficient production lines to support the delivery of large orders. It fully meets the delivery requirements for large-scale engineering projects and long-term distributor cooperation orders.
Strict Quality Control
All products undergo multiple inspections before delivery, including air tightness tests, diameter accuracy checks, wall thickness tests, zinc coating quality tests, pressure resistance tests, and weld strength tests. Each batch of products strictly complies with international industry standards to ensure zero defective products are delivered.
Professional OEM/ODM Services
We offer comprehensive customization services: personalized customization of duct diameters, wall thicknesses, surface treatments, marking printing, product labels, and export packaging. We can independently develop and produce special-shaped accessories and special-sized ducts according to customer project drawings.
Global Export Market Experience
Our products are exported to Europe, North America, the Middle East, Southeast Asia and other regions. We know duct standards in different countries and procurement requirements, and can provide targeted products for global customers solutions and support services for export.
The spiral duct has lower wind resistance and lower pressure loss, which can enhance ventilation efficiency and reduce energy consumption. It has strong sealing performance and its air leakage rate is much lower than that of rectangular air ducts. Moreover, its inner wall is smooth and does not accumulate dust easily, making the later cleaning and maintenance simpler and the overall cost lower in the long term.
The reference prices are as follows: Galvanized steel sheet costs approximately $3 – $9 per foot, which is cost-effective. Aluminum sheet costs about $5 – $12 per foot, and stainless steel ducts cost around $10 – $25 per foot. The prices increase depending on the pipe diameter, thickness and customization requirements.
The common accessories of spiral air ducts mainly include elbow, reducer, tee, end cap, clamp, flange, damper and so on. These accessories can achieve pipe turning, diameter change, diversion, sealing and air volume adjustment, meeting the installation layout requirements of various HVAC and industrial ventilation systems. When used together, they can ensure air tightness and stable operation.
First, you need to plan the route, and then connect the spiral pipe to the fan through the plug, clamp or flange. The interface should be sealed with sealant or aluminum foil tape to prevent leakage. During installation, you should keep it horizontal and vertical. The flexible connection is used for shock absorption. The regulating valve is installed as needed. Finally, you should check the air tightness and stability to ensure no air leakage.
Our products support Class A, Class B and Class C sealing grades, which can meet the air tightness requirements of conventional commercial ventilation and high-standard industrial ventilation projects.
Spiral ducts mainly have four connection methods: The plug-in type is the most commonly used and is suitable for conventional HVAC systems. The clamp-type connection is fast and convenient for installation. Flange type is used for large pipe diameters and high-pressure systems, and the connection is firm. The welding type has the strongest sealing performance and is mostly used in industrial settings.
Yes. We provide three insulation solutions: external insulation cotton wrapping, double-wall spiral duct structure and internal insulation layer attached. They can effectively prevent condensation and reduce heat loss. The insulation materials and thickness can be freely selected according to the project requirements.
The spiral duct itself does not produce significant air flow noise. It has a smooth circular inner wall and the air flows smoothly. Only when the wind speed is too high or the supports are loose will there be vibration noise. With normal installation and combined with sound insulation treatment, it can meet the low-noise requirements of shopping malls, office buildings, hospitals and other quiet setting.
Spiral ducts can be used outdoors. Conventional galvanized steel spiral duct is suitable for short-term outdoor use. For long-term outdoor applications, it is recommended that you choose thickened galvanized steel or stainless steel materials to resist rain, oxidation and ultraviolet rays. This will help extend the outdoor usage period.
Both are suitable. Spiral duct has small wind resistance, low air leakage and high strength, which is suitable for main air supply pipe. Flexible ducts are suitable for short-distance and flexible turning branch ducts. The overall HVAC system should mainly use spiral ducts and supplement with flexible ducts to ensure efficient, stable and low-noise operation.
