Fire doors are frequently opened fire-resistant separation facilities widely used in industrial and civil buildings, which can effectively prevent the spread of flames.

Fire doors are classified by material into steel fire doors and steel-wood composite fire doors; according to the fire resistance limit and thermal insulation performance, they are divided into Class A, Class B, and Class C.

Steel-wood fire door: Developed according to GB 12955-2008 'Fire Door', this type of door is made with steel plates for the frame, using non-combustible wood or non-combustible wood products for the door leaf skeleton and panel, filled with fireproof insulation materials that are harmless to the human body, and equipped with fireproof hardware accessories. It is a door that has certain fire resistance properties.

Steel fire doors: Developed according to GB 12955-2008 'Fire Doors', these doors are made of steel materials for the door frame, door leaf skeleton, and door leaf panel. The door leaf is filled with non-toxic and harmless fireproof insulation materials, which are equipped with fireproof hardware accessories to form a door with certain fire resistance properties.