Flexible fireproof wrapping, high-temperature resistant insulation material, air duct fire protection system

Description :

  Flexible fire-resistant wrapping is a new type of fire-resistant insulation material designed specifically for building ventilation ducts and smoke exhaust systems. It mainly solves the problems of complex construction and easy cracking and detachment of traditional rigid fireproof boards. By tightly adhering to the surface of the air duct in the form of flexible rolls, it provides stable fire resistance limit protection. In the event of a fire, this material can effectively block the damage of high-temperature smoke to the air duct structure, ensuring the normal operation of the smoke exhaust system during critical times. It is widely used in high-rise buildings, underground garages, industrial plants and other places with strict fire safety requirements.

  This product is usually composed of high-temperature resistant glass fiber cloth, aluminum silicate fiber felt or ceramic fiber layer, and aluminum foil composite layer. Common thickness specifications include 10mm, 15mm, 20mm, etc., which can be combined and selected according to the fire resistance time requirements (such as 1.0h, 2.0h, 3.0h). The materials comply with the national classification standards for combustion performance of building materials and products, and have Class A non combustible characteristics. Its thermal conductivity is low, usually below 0.045W/(m · K), and it has good insulation and energy-saving effects. The outer aluminum foil not only enhances the material's tear resistance, but also improves its moisture and corrosion resistance, making it suitable for humid or corrosive environments.

  When selecting, the number of wrapping layers and thickness should be determined based on the purpose of the air duct (air supply or smoke exhaust) and the fire resistance limit required by the design. Suitable for both rectangular and circular ducts, especially for the wrapping construction of irregular shaped fittings and irregular spaces. Compared with hard fireproof boards, flexible fireproof wrapping is lighter in weight, has less impact on building loads, and does not require large machinery for construction. It is easy to cut and the joints are fixed with special fireproof tape or steel strips for better sealing. Not suitable for areas directly exposed to open flames or strong mechanical impacts. It is recommended to add an external metal protective layer for such working conditions.

  Before installation, it is necessary to ensure that the surface of the air duct is clean, dry, and free of oil stains and rust. During construction, flexible fireproof wrapping should be laid flat, with a lap width generally not less than 50mm, and reinforced with high-temperature resistant adhesives or mechanical fasteners. In daily maintenance, it is necessary to regularly check whether the wrapping layer is damaged, detached, or damp, especially in weak areas such as inspection ports and valve connections. If local damage is found, it should be repaired promptly with patches of the same material to maintain the overall fire integrity. The material has stable chemical properties, is not easily aged, and can maintain long-term effective fire protection performance under normal maintenance.

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