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Fire protection performance of security steel doors

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Fire prevention principle of security steel door
The reason why the security steel door can play an important role in the fire is mainly due to its unique structural design and material choice. First of all, this kind of door body usually uses high-quality steel as the main frame, the steel itself has high heat resistance and structural stability, and is not easy to deform or melt in high temperature environment, which can effectively block the fire. Secondly, the internal filling of the door panel is mostly refractory materials, such as rock wool, aluminum silicate fiber, etc. These materials not only have excellent thermal insulation performance, but also absorb heat, reduce the temperature rise rate on the other side of the door, and further delay the spread of the fire. In addition, seals are installed at the door seams to ensure that in case of fire, smoke and flame are difficult to spread through the gaps, thus protecting unaffected areas.

Design feature
Fire resistance grade: According to international and regional standards, security steel doors are divided into different fire resistance grades, corresponding to different fire resistance times (generally 1.5 hours to 0.5 hours). The selection of fire resistance rating needs to be determined according to the specific needs of the building and fire codes.

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