According to the fire resistance limit, the international standard of fire doors is divided into three grades A, B and C.
1. Class A fire door. Its fire resistance is 1.2 hour , generally full steel door. A line of fire doors for the purpose of preventing fires from expanding in the event of fire.
2. Class B fire doors. Its fire endurance is 0.9h, it is a full steel door, a small glass window is opened on the door, and the glass is made of 5mm thick wired glass or fire-resistant glass. Class B fire doors have the main purpose of preventing fires from the openings during fires. C wood fire doors with good performance can also reach Class B fire doors.
3. Class C fire door. His fire resistance is 0.6h, it is a full steel plate door, a small glass window is opened on the door, and the glass is made of 5mm thick wire glass. Most wooden fire doors are in this range.
According to materials, fire doors are divided into two types: wooden fire doors and steel fire doors.
1. Wooden fire door. That is, the surface of the wooden door is coated with a refractory paint, or the decorative fireproof rubber sheet is used for veneering to meet the fireproof requirements. Its fire performance is slightly worse.
2. steel fire doors. That is, it is made of ordinary steel plate, and refractory materials such as rock wool are filled in the door leaf interlayer to meet the fireproof requirements.
Located in a port city, China Dalian Golden House Door & Window Manufacture Co., Ltd. is a large-scale enterprise specialized in producing American-Standard steel fire doors and wooden fire doors. Our company produces 50000 sets of steel fire doors and 20000 sets of wooden fire doors every year. Our fire door products have passed UL Approvals AND FM Approvals and INTERTEK(WH) approval successively. Moreover, our fire door products can be sold directly to more than 20 countries over North America, Latin America, Middle East and Africa.
We respond to tendency of international fire doors market, and provide good service combining foreign clients' needs, with an aim of expanding a wider international market. In the future campaign for world market, our foreign trade elites will achieve better sale performance through unremitting efforts and dedication.
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