Fire rated ductwork usually needs to pass through compartment walls or floors that will have a prescribed fire resistance period in terms of the load bearing capacity, integrity and insulation criteria, for durations of 30 to 240 minutes. It is a requirement that where these compartment walls/floors are penetrated by HVAC ducts or other building services, the fire performance criteria for the penetrated wall or floor are maintained, such that fire in one compartment may not spread to other areas. So, the fire resisting duct needs to maintain i.e., not compromise the fire resistance of the wall or floor through which it penetrates. The performance of a fire resisting duct which penetrates a fire resisting/separating element requires careful consideration by specifiers and controlling authorities. The standard periods of stability and integrity should in all cases be at least equal to those required for the penetrated element of construction.
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#xlpe is chemically crosslinked Polyolefin foam is extremely fine closed cells foam and smooth skins on both sides. It is light in weight, flexible, soft in touch, strong and tough in physical properties, resilient and resistant to moisture, chemicals and extreme temperature. It typically offers superior thermal stability and insulating properties improved dimensional consistency and stability over a wide range of fabrication methods and end-user’s conditions. It is easy to work in fabricating and thermoforming. XLPE foams work well in the building and construction industry where thermal insulation, sound and vibration are critical, due to its low moisture permeability and high buoyancy.

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