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In modern industry, high-temperature air ducts are a key component in many manufacturing processes. They are used to transport high-temperature gases or fumes and therefore need to have superior heat and corrosion resistance. In recent years, high-temperature air ducts made of fiberglass have gradually gained popularity due to their excellent performance. In this paper, we will discuss the advantages of glass fiber high temperature air duct, application areas and its development trend.






the advantages of glass fiber high temperature flexible duct




1. Excellent heat resistance
Fiberglass material can withstand temperatures up to 1000 ° C, which makes it in the high-temperature environment, suitable for high-temperature gas transmission.


2. Lightweight design
Compared with metal ducts, fiberglass ducts are lightweight, which reduces the burden on equipment and optimizes installation and maintenance costs.


3. High corrosion resistance
Fiberglass has good resistance to a variety of chemicals and environmental factors, so that it can still work stably in harsh environments.


4. Excellent insulation properties
Fiberglass provides excellent thermal insulation, reducing heat loss and improving energy efficiency while protecting surrounding equipment and staff.


5. Flexibility and customizability
Manufacturers can customize the size and shape of the duct to meet the requirements of different industrial applications.






Application Areas




Fiberglass high temperature air ducts are widely used in several industries, including:
1. Chemical industry
In chemical production, it is often necessary to transmit high-temperature exhaust and gases. Fiberglass ducts are suitable for flue and ventilation systems of chemical reaction equipment due to their corrosion and high temperature resistance.


2. Metallurgical industry
Many metallurgical processes require the transmission of gases at high temperatures. Fiberglass high-temperature ducts can effectively cope with these extreme conditions and ensure the normal operation of the equipment.


3. Power industry
In power plants, especially thermal power plants, fiberglass ducts are used to discharge flue gases and ensure that environmental protection standards are met.


4. Food Processing
Certain food processes require high temperature steam, and the high temperature resistance of fiberglass ducts ensures food safety and equipment performance.






the future development trend




With the continuous progress of industrial technology, the market demand for fiberglass high-temperature air ducts is expected to continue to increase. Future development trends may include:


1. Enhancement of material properties
Through composite material technology to improve the heat and corrosion resistance of air ducts to meet more demanding industrial conditions.


2. Intelligent
Development of high-temperature air ducts with temperature and pressure sensors to realize real-time monitoring and improve operational safety.


3. Green
With the rise of environmental awareness, future products will pay more attention to the environmental protection of materials to reduce the impact on the environment.






Conclusion




High-temperature air ducts made of glass fiber are gradually becoming the favorite of the market due to their excellent performance and wide application prospects. With the continuous progress of science and technology, future high-temperature air duct products will be more intelligent and environmentally friendly, providing more reliable protection for industrial development.




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In industrial environments, safety is a top priority, especially where flammable gases or dusts are present. Explosion-proof flexible ducts are an important ventilation solution that not only provides reliable air circulation, but also guarantees workplace safety. In this article, we'll look at the definition, applications, benefits and factors to consider when selecting explosion-proof flexible ducts.


What is explosion-proof flexible duct?
Explosion-proof flexible duct is a type of ventilation duct designed for hazardous environments, usually made of fire-resistant materials, to prevent accidents caused by gas explosions or fires. Compared to traditional ducts, explosion-proof flexible ducts are more adaptable and flexible, and can be installed and maintained in tight spaces or hard-to-reach areas.


Application Areas
Explosion-proof flexible air ducts are usually used in the following fields:
1. chemical plants: for gas and vapor discharge, to protect the safety of employees.
2. Mining industry: to provide effective ventilation in mines and prevent gas buildup. 3.
3. Pharmaceutical industry: to ensure a dust-free environment and control the spread of hazardous substances.
4. Marine and offshore engineering: providing reliable air circulation in complex environments.


Advantages of explosion-proof flexible duct
1. Safety: Explosion-proof design greatly reduces the risk of fire and explosion and guarantees the safety of the workplace.
2. Flexibility: It can be freely bent and adjusted in shape, applicable to various installation requirements.
3. Durability: Adopting high wear-resistant material, it can withstand high temperature and chemical corrosion.
4. Easy installation: the lightweight design makes installation and disassembly very simple, saving time and labor costs.


Considerations when choosing explosion-proof flexible ducts
When choosing explosion-proof flexible air duct, you need to consider the following factors:
1. material: choose the right material, such as aluminum alloy, PVC or fiberglass, depending on the temperature, pressure and chemical reactivity of the working environment.
2. Diameter and length: Choose the right size based on actual ventilation needs and space constraints.
3. Certification standards: Ensure that the product purchased complies with relevant safety and explosion-proof standards, such as ATEX, IECEx and other certifications.
4. Maintenance requirements: Choose a design that is easy to clean and maintain to ensure safety and reliability for long-term use.


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Summarize
Explosion-proof flexible ducts are essential for ensuring safe ventilation in modern industry. From chemical plants to mining operations, their flexibility and safety make them the preferred choice for many industries. By understanding their applications, benefits, and buying factors, you'll be better able to choose the right explosion-proof flexible duct for your needs.


If you have more questions about explosion-proof flexible ducts or would like to learn more about certain aspects, please feel free to contact me!
Contact Information:
For more information, please contact:
🌐web : https://www.nuoenwei.com
📞Phone/whatsApp : 86-15875732388
✉️E-mail : sales@fsnuowei.com

I. Comparison of material characteristics: flexibility versus durability



Flexible duct



Material: usually made of wire frame (e.g. spiral steel wire) wrapped with composite material (aluminum foil, polyester fiber or PVC), the outer layer may be added with thermal insulation.
Advantages: lightweight, bendable, suitable for complex spatial layout; strong anti-vibration performance, can adapt to equipment vibration.
Limitations: low airtightness, easy to leak in high-pressure systems; easy to accumulate dust on the surface, long-term use may breed mold (need to be cleaned regularly).



Rigid duct



Material: mostly galvanized steel plate, aluminum plate or stainless steel, connected by welding or flange into a fixed shape (round, rectangular).
Advantages: stable structure, high airtightness, suitable for high-pressure and high-efficiency air supply; smooth surface, low resistance, low long-term maintenance costs.
Limitations: heavy weight, installation requires precise planning; unable to bend, need to cut and reorganize when remodeling.



II. Installation costs: short-term inputs vs. long-term benefits



Flexible duct



Low initial cost: no need for custom shapes, fast installation, 30%-50% savings in labor costs.


Hidden costs: shorter lifespan (10-15 years), high replacement frequency; insulation is prone to breakage and may increase energy consumption.






Rigid duct



High initial cost: requires professional tools for cutting and welding, long installation period; large projects may require customized molds.


Long-term advantages: service life up to 30 years or more; easy maintenance, air leakage rate below 5% (up to 15% for flexible ducts).






III, the applicable scenario analysis: matching the demand in order to efficiently save energy



HVAC system



Flexible air ducts: suitable for residential, small commercial spaces or remodeling projects. For example, when the air conditioning ducts in the attic need to bypass the beams, the flexible ducts can be flexibly adapted.
Rigid duct: large shopping malls, office buildings and other places that require efficient air supply, its low resistance characteristics can reduce air conditioning energy consumption.



Industrial Ventilation



High temperature/corrosive environments (e.g. chemical plants): stainless steel rigid ducts are the only choice for high temperature and corrosion resistance.
Temporary ventilation needs (e.g. construction sites): lightweight flexible ducts allow for quick deployment and easy disassembly upon completion.



Laboratory & Cleanroom



Rigid ducts: easy to clean surfaces and no fiber shedding, meets ISO 14644 cleanliness standards.
Exception: when vibration isolation is required in animal laboratories, flexible connection sections can be used locally.




IV. How to Choose? 5 Key Questions to Help You Decide



Is the space layout complex? → Select Flex.
Does the system require high pressure air supply? → Choose rigid.
Is the budget for short-term savings or long-term investment? → Flexible for short term, rigid for long term.
Is the environment corrosive/high temperature? → Rigid stainless steel duct.
Do you need to remodel frequently? → Flexible is more flexible.



Conclusion: There is no “best”, only “most suitable”.



Flexible ducts win out with low cost and high flexibility for projects with limited budgets or complex spaces, while rigid ducts are the preferred choice for large projects and demanding environments due to their high efficiency and durability. In practice, a hybrid solution (e.g., rigid for mains and flexible for branches) may be more cost-effective.






For more information, please contact:
🌐web : https://www.nuoenwei.com
📞Phone/whatsApp : 86-15875732388
✉️E-mail : sales@fsnuowei.com


If you are interested in specific applications or customized solutions for air conditioning insulated ducts, you can contact us for professional advice and solutions tailored to your needs. Or you can find us through the following platforms：
https://www.nuoenwei.com/
https://www.youtube.com/@NUOWEIventilation
https://x.com/NUOWEIVENT
https://www.instagram.com/nuoenwei/
https://www.linkedin.com/company/foshan-nuowei-ventilation-co-ltd/?viewAsMember=true
https://www.facebook.com/NuoWeiventilation/

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I. Product overview




Both air ducts are used with barn air conditioner coolers, with basic properties such as flame retardant, corrosion resistance and heat insulation, but with significant differences in core parameters:
High quality duct: main color is yellow, thickness 4mm, lower thermal conductivity (0.027 W/(m.K)), total weight 650±20 g/m³, tensile strength up to 2300N.
General duct: the main color is orange or army green, thickness 2mm, thermal conductivity is slightly higher (0.037 W/(m.K)), total weight 350±20 g/m³, tensile strength is 563N.





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II. Core Parameters Comparison




1. Material and structureFabric Thickness: 0.55mm for high quality model vs 0.38mm for general model, the former is more wear-resistant and durable.


2.Total weight: High-quality model is heavier (650±20 g/m³), but with better heat preservation effect; general model is lightweight (350±20 g/m³), suitable for temporary or mobile scenes.





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II. Core Parameters Comparison




1. Material and structureFabric Thickness: 0.55mm for high quality model vs 0.38mm for general model, the former is more wear-resistant and durable.
Total weight: High-quality model is heavier (650±20 g/m³), but with better heat preservation effect; general model is lightweight (350±20 g/m³), suitable for temporary or mobile scenes.、


2. Mechanical propertiesTensile strength: High quality model (2300N) is 4 times more than general model (563N), suitable for high pressure environment.
Tear strength: the general model (360N/5cm) is slightly higher than the high-quality model (300N/5cm), but the adhesion force is only 35N/5cm (90N/5cm for high-quality model), with higher risk of easy delamination.


3. Thermal insulation and temperature resistanceThermal conductivity: High-quality models 0.027 W/(m.K) is better than general models 0.037 W/(m.K), reducing cold air loss by about 30%.
Temperature resistance: both cover -30°C to +80°C (measured value), but the high-quality model claims in the user's description that the upper limit of temperature resistance is up to 100°C, which is suitable for harsher environments.


4. Safety approvalsFlame retardancy: The high-quality model has passed UL94 VTN4-0 certification (international general standard), while the general model is only labeled “BZ”, which may be a regional standard and requires further confirmation.







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III. Analysis of Advantages and Disadvantages




TypeAdvantage LimitationsHigh quality duct Strong insulation, durability, high safetyHigh weight, high costGeneral duct Lightweight, flexible, economical Weak insulation effect, easy to deteriorate with long-term use






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IV. the applicable scene recommendation




High-quality ducts: suitable for long-term fixed installation, high demand for air-conditioning delivery (such as large grain silos, data centers), especially focusing on energy saving and durability.
General duct: suitable for short-term projects, limited budget or frequent movement of the occasion (such as temporary storage, small workshop).





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V. Conclusion




When choosing air conditioning insulation ducts, it is necessary to weigh the cost and performance requirements. If you are looking for long-term stable operation and high energy efficiency, high-quality ducts are ideal; while general models are lightweight and economical, suitable for non-intensive scenarios. It is recommended to prioritize reference to authoritative testing standards (e.g. DIN, BS) and verify the certification details provided by suppliers to ensure system safety and performance.





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Application Inquiries




▶️ Sample testing has been provided for some national cold airports
▶️ Support small batch customized production, technical consultation please contact: [Elaine/sales@fsnuowei.com ]
▶️ Visit the official website to view the video: [https://www.nuoenwei.com]

How to Connect Flexible Duct: 5 Professional Methods Explained



When connecting flexible ducts, properly connecting flexible ducts is crucial for optimal airflow and system efficiency. There are several reliable methods to join flexible ducts, each with its own advantages. In this guide, we’ll explore the five most common ways to connect flexible ducts, ensuring a secure and airtight fit for your ventilation system.




1. Flared Collar with Drawstring (Sleeve & Gasket Method)



This method uses a flared collar with a built-in drawstring to secure the flexible duct. Here’s how it works:
Slide the flexible duct over the flared collar of the fitting.
Tighten the drawstring to create a snug, airtight seal.
Secure with a zip tie or clamp for extra reinforcement.
✅ Best for: Quick installations where a tight seal is needed without additional hardware.

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2. Steel Band Overlap Connection (Dual-Band Coupling)



This method involves two steel bands (rings) on each duct end, which interlock for a strong connection:
Slide one duct’s steel band over the other.
Pull the overlapping bands tightly to lock them in place.
Ensure no gaps remain to prevent air leaks.
✅ Best for: Heavy-duty applications where a rigid, long-lasting connection is required.

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3. Zipper Connection (Quick-Connect Zip System)



Some flexible ducts come with integrated zippers for fast assembly:
Align the zipper tracks on both ducts.
Zip them together like a jacket, ensuring a smooth closure.
Check for gaps and reinforce with tape if needed.
✅ Best for: Temporary setups or when frequent disassembly is required.

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4. Webbing Strap with Buckle (Adjustable Cinch Strap)



This method uses a heavy-duty webbing strap and buckle to secure the duct:
Wrap the strap around the joined duct ends.
Thread the strap through the buckle and pull tight.
Lock the buckle in place for a firm hold.
✅ Best for: Large-diameter ducts where adjustable tension is beneficial.

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5. Stainless Steel Clamp (Hose Clamp)



A stainless steel clamp provides a strong, durable connection:
Slide the clamp over one duct end.
Insert the second duct and overlap the connection.
Tighten the clamp with a screwdriver until secure.
✅ Best for: Permanent installations requiring maximum durability.

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Which Connection Method Should You Choose?



For quick, tool-free installation → Drawstring or Zipper
For heavy-duty, permanent setups → Steel Band or Stainless Clamp
For adjustable, large-diameter ducts → Webbing Strap




Pro Tips for a Secure Connection



✔ Always inspect for air leaks after installation.
✔ Use foil tape or mastic sealant for extra airtightness.
✔ Avoid over-tightening clamps, which can damage the duct.
By choosing the right connection method, you can ensure efficient airflow, reduced energy loss, and a longer-lasting HVAC system. Need flexible duct supplies? Check out our high-quality connectors and accessories for a professional-grade installation!





🔗 Explore our ducting solutions today!
For more information, please contact:
🌐web : https://www.nuoenwei.com
📞Phone/whatsApp : 86-15875732388
✉️E-mail : sales@fsnuowei.com


If you are interested in specific applications or customized solutions for air conditioning insulated ducts, you can contact us for professional advice and solutions tailored to your needs. Or you can find us through the following platforms：
https://www.nuoenwei.com/
https://www.youtube.com/@NUOWEIventilation
https://x.com/NUOWEIVENT
https://www.instagram.com/nuoenwei/
https://www.linkedin.com/company/foshan-nuowei-ventilation-co-ltd/?viewAsMember=true

https://www.facebook.com/NuoWeiventilation/