Steel fireproof door is made of steel material, door frame and door panel. If the door door is filled with material, it is filled with nontoxic and harmless fireproof and heat insulating material. Safety facilities for preventing the spread of underground or building fires requiring fire protection and for controlling airflow, usually divided into steel and wood fire doors.
First-class fire doors, fire limit 1.5 hours
Fire doors.
Fire doors.
Class B fire doors, fire limit 1.0 hours
Class C fire doors, fire resistance limit 0.5 hours
There are many kinds of fireproof doors, such as wood fireproof doors, glass fireproof doors, steel fireproof doors, etc.. According to the work can be divided into: doors to prohibit fire doors, entry door, indoor fire doors, blast-proof fire doors, fast-locked fire doors, fire-proof doors, fire-proof doors, and so on;

According to the technology: have electronic fire doors;
By the installation position of closed door: external fire door and built-in fire door;