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Technical specifications for fire-resistant doors

Fire-resistant doors are available in steel, glass, stainless steel, and wooden types, and are categorized into Class A, B, and C.

The fire-resistant door interior is filled with non-combustible or flame-retardant lightweight fire-resistant materials, typically with perlite board.

Fire door leaf steel plate thickness not less than 0.8mm, door frame steel plate thickness not less than 1.2mm, specific thickness varies according to the fire door grade.

Fire-resistant doors must pass inspection and be certified by the "National Fixed Fire Extinguishing System and Fire-Resistant Component Quality Supervision and Inspection Center."