Product Description:
This double-layer steel fireproof and insulated front door is mainly composed of inner and outer double-layer steel plates, fireproof filling core material, inner frame reinforcement layer, heat insulation sealing layer, multiple lock system, high temperature resistant sealing strip, door frame system and hinge accessories. The inner and outer layers of the door body are pressed and formed with hot-dip galvanized steel plates or electrolytic cold-rolled steel plates. The thickness of the plate is between 0.8mm and 1.2mm. It can be further thickened and strengthened according to different customer usage scenarios. The surface is treated with high-temperature spraying process to form an anti-corrosion protective layer. The middle core layer is the key component of fireproof and heat-insulating performance. It uses composite materials such as inorganic fireproof rock wool, high-density calcium silicate board, and expanded perlite composite core material. These materials can effectively block heat conduction in high temperature environments and are non-flammable, ensuring that the door body will not support combustion in a fire scene. The inner frame part uses a steel welded frame system, and adopts a multi-point reinforcement rib design to improve the overall impact resistance and deformation resistance. The door frame is designed to be integrated with the door leaf, made of steel of the same specification, interlocked with the door leaf, and with the built-in sealing strip to achieve excellent airtightness.

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