In the context of modern construction, Ensuring indoor air quality (IAQ) in commercial buildings, Industrial factories or civil engineering projects are top priority. Ventilation systems act as the "lungs" of a building. And choosing the right type of air duct is a crucial factor in determining the performance of the entire system. Among the available options, round duct emerging as a superior solution, They are gradually replacing traditional square air ducts in many applications due to their superior technical and aesthetic characteristics.
This article will delve into understanding about round duct, starting from the basics, classify, Analyzing the advantages and disadvantages, down to practical applications. This helps investors and MEP contractors gain the most comprehensive overview to make the right choices for their projects.
What is a round duct? Its role in HVAC systems.
Round air duct It is an indispensable component in air conditioning and ventilation (HVAC) systems. Basically, These are pipes with a circular cross-section. Made from various materials such as galvanized steel, stainless steel, Used for transporting airflow (fresh air, return wind, (exhaust air) between different areas within a building or between the indoor and outdoor environments.
Unlike square or rectangular ducts, cylindrical structure of round duct This offers distinct advantages in terms of aerodynamics. Its main function is to ensure efficient air circulation. provide oxygen, temperature control, moisture and dirt removal. toxic gases, creating a comfortable living and working environment, safe. Nowadays, With the development of manufacturing technology, round duct It is not merely a technical device but also serves as an interior design element in spaces with open ceiling designs.
Detailed classification of common types of round air ducts currently in use.
To meet the diverse needs of construction projects, market round duct There is a wide variety of types available today. Classification is usually based on structure and manufacturing materials.
Classification by technical structure
Based on the processing method and surface shape, round duct divided into two main types:
1. Spiral round duct: This is the type round duct The most popular currently. It is manufactured by coiling strips of sheet metal or stainless steel in a spiral pattern. The joints are locked together using a double-seam technique, creating spiral ribs that run along the length of the pipe.
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Advantage: The spiral ribs serve as reinforcement. This helps to increase the rigidity of the pipe many times compared to a smooth pipe of the same material thickness. This allows the use of thinner materials while still ensuring high wind pressure resistance. It helps save costs. Round air duct Twists also have high aesthetic value. It is commonly used for buildings without ceilings.
2. Longitudinal Seam Duct: This type of pipe has a smooth surface. It is rolled from sheet material and welded or seamed along the length of the pipe.
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Characteristic: Round air duct Smooth is often used in special applications that require extremely smooth internal surfaces to minimize dust accumulation or for small sized systems, or make a chimney, exhaust pipe. Because there are no reinforcing tendons, This type of pipe typically requires a greater material thickness compared to coiled pipe to achieve the same strength.
Classification by manufacturing material
The materials used in manufacturing determine the durability and the application environment of the product. round duct:
1. Galvanized steel round air duct: Use high-quality galvanized steel sheets (usually from brands like Hoa Sen, Southern Vietnam…). The zinc coating helps protect the underlying steel from corrosion in normal atmospheric conditions. This is the most popular type of material due to its good balance between cost and durability. Suitable for most residential and light industrial ventilation systems.
2. Stainless Steel Round Air Ducts: Made from 201 stainless steel, 304 or 316. Round air duct Stainless steel has superior corrosion resistance. It can withstand high temperatures and chemicals. This type is commonly used in harsh environments such as chemical plants. laboratory, hospitals (requiring high hygiene standards) or industrial kitchen exhaust systems, Hot air exhaust system. Stainless steel 304 is the most popular choice due to its better rust resistance compared to stainless steel 201.
Why choose round ducting? An analysis of its outstanding advantages.
The shift from square ductwork to round duct This is not accidental in many modern designs. Here are the technical advantages that make round duct It becomes the optimal choice:
1. Aerodynamic efficiency and energy saving
A circular cross-section is the most ideal shape for transporting liquids and gases. Round air duct It has the smallest perimeter per unit area of cross-section compared to any other shape. This means that the friction between the pipe walls is significantly lower compared to square pipes.
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Benefit: Reduce pressure loss in the pipeline. This allows the fan to operate more quietly. This will save energy consumption for the entire HVAC system throughout its operating life.
2. Effective noise reduction
Because the airflow is smoother and there is less turbulence at the corners (which does not exist in a round tube), round duct helps reduce noise caused by wind flow. Furthermore, Round structure has better pressure resistance, It produces less vibration and noise compared to the flat surface of a square tube when operating at high pressure.
3. Easy installation and reduced construction costs
System round duct They typically use coupling or flange connection methods. This makes installation quicker and simpler. The standard length of round pipe (usually 3m or 4m) is longer than that of square pipe, helps reduce the number of joints. thereby shortening installation time and reducing labor costs. Lighter weight is also an advantage when working at height.
4. Simple cleaning and maintenance.
The non-angular structure of round duct Helps minimize the accumulation of dirt and bacteria in dead corners - a common problem with square pipes. Regular pipe cleaning is also much easier with specialized robotic cleaning equipment, ensure air quality is always at its best.
5. High aesthetic appeal
In the current trend of open ceiling architecture design, The mechanical and electrical systems are left exposed as part of the interior design. Round air duct, especially galvanized or polished stainless steel coiled pipes, bringing an industrial aesthetic, It's much more modern and streamlined than the bulky square tube.
Synchronized round duct accessory system
A complete ventilation system cannot consist of only straight duct sections. To direct the airflow, Branching and connecting to terminal devices, An accessories system is needed. round duct Synchronized and accurate. Essential accessories include:
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Reducer: Used to connect two pipes of different diameters, It helps to change the cross-sectional area of the flow.
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Elbow/Bend: 45-degree elbows, 90 degrees used to change the direction of the pipe. Round elbows have much better aerodynamic flow than square elbows.
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Tee and Cross: Used to branch or combine air flow from the main pipe to branch pipes.
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Coupling: Accessories used to connect two sections round duct align them.
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Volume Control Damper (VCD): Used to adjust air flow or cut off air flow in a pipeline.
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Weather Louver: Install it at the end of the outdoor exhaust or fresh air intake duct to prevent rainwater and insects from entering.
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Round Diffuser: Air supply or return terminal, It helps to distribute air evenly throughout the space.
Using synchronized accessories, High-precision manufacturing is crucial to ensuring the system's tightness. round duct, Prevent air leaks that waste energy.
Diverse applications of round ducts in practice
Thanks to its outstanding advantages, round duct Widely applied in almost all fields:
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Commercial & Office Building: Used in central air conditioning systems, fresh air supply for high-rise buildings, shopping mall, office Particularly popular in open-ceiling spaces.
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Industrial factory: Used for factory ventilation systems. cooling the factory, vacuum cleaner, Extracting industrial exhaust fumes. High pressure resistance of round duct Spiral designs are well-suited for high-power fan systems.
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Hospitals & Clean Rooms: Use round duct stainless steel to ensure hygiene standards, anti-corrosion due to cleaning chemicals, easy to clean and disinfect
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Restaurants & Hotels: Industrial kitchen exhaust systems (usually using stainless steel pipes). fresh air supply to the lobby, lobby, conference room
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Sports facilities and stadiums: Large spaces require a powerful ventilation system and aesthetically pleasing ductwork.
Production process and quality standards
To create these products round duct quality, Reputable companies (based on the information you provided) typically employ modern production processes with highly automated machinery (coil tube making machines, etc.). CNC plasma cutting machine…).
Basic technical standards:
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Material: Galvanized steel according to JIS G3302 standard, ASTM A653… or international standard 304/201 stainless steel.
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Thickness: The thickness of the sheet metal is calculated based on the pipe diameter and working pressure of the system. Comply with standards such as SMACNA (USA) or TCXDVN. For example, Small diameter pipes can use 0.58mm, while larger diameters require 0mm sheet metal.75mm, 0.95mm or 1.15mm.
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Tightness: The seams, The weld must ensure a tight seal. no air leakage
Round duct quotation and influencing factors
The cost of round duct Not fixed but depends on many fluctuating market factors and specific project requirements:
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Raw material price: This is the biggest influencing factor. The prices of galvanized steel sheets and especially stainless steel fluctuate frequently according to the global market.
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Size and thickness: The larger the pipe diameter, The thicker the material, the higher the cost per meter.
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Pipe type: Stainless steel pipes are much more expensive than galvanized steel pipes. There are also price differences between coiled and smooth pipes depending on the specifications.
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Order volume: Bulk project orders often have better discounts than retail purchases.
To receive a quote round duct most accurate, Customers need to provide a detailed quantity take-off table (specifications, diameter, thickness, material type) to the supplier.
Choose a reputable round duct supplier
Choosing a reputable supplier is a key factor in ensuring the quality and progress of the construction project. A production unit round duct To be professional, one needs to meet the following criteria:
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Owning modern machinery lines, Ensuring high accuracy and large production capacity.
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Using raw materials with a clear origin, high quality (like Hoa Sen Steel, South, Standard stainless steel…).
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A team of skilled technicians, Understanding technical standards.
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Consulting services, Excellent technical support and warranty service.
Conclude
Round air duct It is increasingly establishing itself as the optimal solution for modern ventilation and air conditioning systems. With outstanding advantages in flow performance, energy saving, aesthetic and easy to install, round duct It's a smart investment for any project. Hopefully, this article has provided you with the most complete and in-depth information. This will help you confidently choose the right ventilation solution for your project.
CONTACT INFORMATION – SAO VIET AIR DUCT MANUFACTURING AND TRADING COMPANY LIMITED
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Factory address: 267 Le Thanh Tong, May Chai, Ngo Quyen, Hai Phong
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Hotline/Zalo:
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Mrs. Hang: 0815.999.826
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Mrs. Giang: 0934.559.168
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Mrs. Linh: 0949.852.886
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Tel: 0985.239.838
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E-mail: vietonggio@gmail.com / dieuhoasaoviet@gmail.com
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Website: onggiosaoviet.vn - dieuhoasaoviet.vn
Let Sao Viet Air Ducts be your partner in creating healthy and safe living spaces!
