As we all know, due to different materials, fire doors are commonly classified into wood, steel and steel wood. No matter what materials are used, they must meet the fire integrity and thermal insulation of fire doors. There are three grades of fire doors: Class A, Class B and Class C. The fire resistance time is 1.5 hours, 1.0 hours and 0.5 hours in turn.
Steel fire door consists of door frame, door leaf, fire lock, fire door closer, fire hinge, etc. The door frame is made of electro-galvanized steel plate, a layer of glass-magnesium enviable plate is arranged in the combination place, and cement mortar is poured into the door frame; Both face plates of the door leaf are galvanized steel plates, expanded perlite plates are filled in the door leaf, fire-proof expansion sealing strips are arranged at the joint between the door frame and the door leaf and around the fire-proof lock.
Wooden fire doors use nonflammable wood materials or nonflammable wood products as door frames, door leaf skeletons and door leaf panels. If the door leaf is filled with materials, it is filled with fire-proof and heat-insulating materials that are non-toxic and harmless to human body, and the doors are equipped with fire-proof hardware fittings and have certain fire resistance.
Steel wood fire doors are made of steel and fire-resistant wood materials or fire-resistant wood products to form door frames, door leaf frames and door leaf panels. If the door leaf is filled with materials, the door leaf is filled with fire-resistant and heat-insulating materials that are non-toxic and harmless to human body, and is equipped with fire-resistant hardware fittings to form doors with certain fire resistance.
Fire doors made of other materials are made of inorganic non-combustible materials except steel, non-combustible wood or non-combustible wood products, or some of them are made of steel, non-combustible wood and non-combustible wood products to make door frames, door leaf frames and door leaf panels. If the door leaf is filled with materials, the door leaf is filled with non-toxic and harmless fire-proof heat-insulating materials and is equipped with fire-proof hardware fittings to form a door with certain fire resistance.
Fire doors are generally made of perlite board filled inside, fire-proof board attached outside, and melamine board attached to the outermost layer.
Time:2020-03-04 15:52:28
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