国产精品无码在线福利社,国产浮力精品专区第1页,99久久久国产精品五月色情

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        Fire Block Loop

        1、Product introduction
          Fire block loop is a kind of fire blocking product especially for conduits, made of burning-resistant and expansive material with special techniques by pressing. The shell of it is molded by pressing the stainless steel sheet. The product has the characters of fire-proof, expansive, water- and grout-proof. It is easy to install and remove. When it meets fire, the lining material will expand immediately and block out the conduit’s hatch to form a layer of fire block and heat insulation. It can effectively stop the flame burning other places and extending, and stop the toxic smoke and gas infiltrating.
          

        2、Physical and chemical capability technical parameters
        Shell
        The shell of the fire block loop is usually made of metal material with a cover layer by corrosion-proof treatment (excludes stainless steel). The surface of the shell is not allowed to have rust marks and spots, and the cover layer is not allowed to craze, flake or desquamate. The salt spray-proof ability of the shell should be: appearance grade≥8; protection grade≥9.
        The distensibility of fire block and expansive core material
        Not dipped Expand volume≥10ml/g
        Dipped in water after 48h Expand volume≥10ml/g
        Dipped in grout after 48h Expand volume≥10ml/g
        Block time 
        ≤20min
        Fire-resistant utmost
        Class 8≥120min, test pipes back towards fire do not collapse; The mean temperature of these pipes’ surface behind the conduit which is blocked by fire block loop is less than 140℃ or the temperature of the pipes’ center is less than 180℃; These pipes don’t have any blaze. The cotton mat doesn’t be lighted.

        3、Construction methods
          Clean up the backside of the installation places and the conduit, put the two half of fire block loop around the conduit to form a whole. Then fix it at the back of the floor board by expansive screws.
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        国产精品无码在线福利社,国产浮力精品专区第1页,99久久久国产精品五月色情