Why can steel fireproof doors prevent fire?_Shandong Huomande Security Technology Co., Ltd.

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Why can steel fireproof doors prevent fire?

Jul 11,2025

The structure of steel fireproof doors mainly consists of door frames, door leaves, and internal fillers.

Steel fire doors are now widely used. Why do steel fire doors have such good fire resistance and what is their internal structure? Shandong Huomande Security Technology Co., Ltd. is willing to introduce itself to everyone.

The function of steel fireproof doors

1、 Steel fire doors can meet the requirements of fire resistance stability, integrity, and thermal insulation for a certain period of time. In addition to fire resistance, steel fire doors also play a role in preventing the spread of fire and smoke, preventing the spread of fire and evacuating personnel for a certain period of time.

The structure of steel fireproof doors

2、 The structure of steel fireproof doors mainly consists of door frames, door leaves, and internal fillers. Accessories such as door closers and fireproof locks with fireproof functions are installed on the door leaves. The door leaf and frame of the steel fireproof door are made of galvanized sheet material, which has high strength, high durability, anti-corrosion and moisture-proof characteristics, and can be used normally for a long time. The interior of the steel fireproof door leaf is filled with fireproof materials, which can maintain a certain degree of fire resistance for the steel fireproof door. The fireproof door can withstand fire for more than 1.5 hours. The hardware components of steel fire doors include door closers and fire locks, fire gun chains, fire door sequencers, etc., all of which have a certain degree of fire resistance while ensuring durability. The gaps between the door leaf and door frame of the steel fireproof door will be filled with fireproof expansion strips. When the fire house is affected by high temperature, it will automatically expand, sealing the gaps of the fireproof door and preventing smoke from spreading.

The fire resistance effect and material of steel fire doors are related to their internal structure. Steel fire doors use materials and environmentally friendly fillers, which not only have fire resistance but also durability.

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