Overview of Insulated PIR Duct
Core Material: PIR foam is adopted, with a closed-cell rate usually reaching over 95%, featuring excellent thermal insulation and sound insulation properties.
Facing Material: Common facing materials include aluminum foil, color-coated steel plates, aluminum plates, etc. The surface of aluminum foil is usually compounded with an antibacterial and antioxidant coating, which can effectively prevent corrosion and rust and keep the pipes clean; color-coated steel plates and aluminum plates have relatively high strength and aesthetic appeal.
The insulation core material determines a panel's performance, cost, and suitability. Three common types:
Polyurethane (PU) Panels: Great thermal insulation (λ = 0.02 W/m·K), waterproof closed-cell foam, high compressive strength (50 kg/m³ density). Light, cost-effective, easy to cut/make.
Polyisocyanurate (PIR) Panels: Superior fire resistance (self-extinguishing, low smoke), good thermal efficiency (λ = 0.020–0.024 W/m·K) even at high temps, durable, Maximum running temperature 80℃.
Phenolic Foam Panels: Top-notch fire safety (non-combustible, no flame spread), low smoke toxicity, good thermal insulation (λ = 0.02W/m·K). Maximum running temperature 120℃.
Main Types of Insulated PIR Duct
The Advantages of Insulated PIR Duct
Good Fire Resistance: The fire rating can reach Class B1 (GB 8624 - 2006). It does not release black toxic smoke when burning, and the generated smoke has low toxicity, meeting international fire safety standards.
Thermal Insulation and Energy Saving: The thermal conductivity is as low as about 0.022 W/m·k, which can effectively reduce heat transfer in the duct system and lower energy consumption.
Clean and Aesthetic: Both sides are compounded with facing materials such as embossed aluminum foil with antibacterial and antioxidant coatings. The appearance is beautiful, and it can keep the interior of the pipeline clean, improving air quality.
Convenient Construction: It is lightweight. For example, a 20mm - thick PIR panel weighs only 1.4kg per square meter, which is about 1/10 of that of traditional iron sheet ducts. It is convenient for transportation, on - site fabrication and installation, and can save a lot of transportation and labor costs.
Sound Insulation and Noise Reduction: PIR foam has excellent shock - absorbing and sound - insulating performance, which can effectively reduce the noise and vibration generated during the operation of the duct system.
Long Service Life: The anti - corrosion coating on the surface of aluminum foil makes it highly corrosion - resistant, not easy to dew, and the service life can reach more than 20 years.
Low Water Absorption: After 24 - hour soaking, the water absorption rate is less than 2%, suitable for humid environments such as kitchens and swimming pools.
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