Fire door can be divided into steel fire door and wooden fire door. The steel fire door can be divided into class a and class b and class c three levels, class a fire door acuity 1.2 h, class b fire door acuity 0.9 h, class c fire door acuity 0.6 h. Steel fire door is made of cold rolled steel plate, cold forming. Inside the door leaf filling refractory, according to the requirements of fire resistance rating according to user needs can be equipped with all kinds of hardware accessories. Surface after antirust coating treatment, manufactured products according to customer requirements for color processing, the product integrity is strong, supporting high strength under high temperature, aesthetically pleasing, is the ideal choice for all kinds of high-grade architecture. Fire doors are widely used in commercial, residential, enterprises, government agencies, Banks, entertainment venues, schools, industrial and mining enterprises, etc.