| Steel fire door refers to the cold-rolled thin steel plate for the door frame, skeleton, door plate, in the door door filled with non-combustible insulation material, according to the need to install composite fire glass on the door and the door door is provided with A class A composite fire glass lighting window, and with fireproof hardware accessories composed of the door can meet the fire integrity and heat insulation requirements. Steel fire doors can be divided into Class A, Class B and Class C fire doors according to fire resistance, and their fire resistance requirements are 72min, 54min and 36min respectively. Steel fire doors should be made of cold-rolled thin steel plates to make the door frame, door panel and reinforcement. The thickness of the door frame and door plate is 1.2mm~1.5mm and 0.8mm~1.2mm, respectively. The thickness of the steel plate of the reinforcement is 1.2mm~1.5mm, and it is not less than 3mm if the screw hole is provided. Hardware accessories for steel fire doors must be refractory hardware accessories, the main hardware accessories are: fire hinges (hinges), fire latches, fire locks, fire sequencer and fire door closers. |
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