Xuanyuan fireproof door is made of steel materials to make door frame, door leaf frame and door leaf panel. If the door leaf is filled with materials, it will be filled with non-toxic and harmless fireproof and thermal insulation materials. The door with a certain fire resistance performance is composed of fireproof hardware fittings.
Features of Xuanyuan fire door: steel fire door is a door with fire resistance stability, integrity and heat insulation made of fire retardant materials. It is mainly used at the firewall opening of the building fire compartment, stairwell entrance and exit, evacuation walkway, pipeline wellhead, etc. It is usually used for the passage of people. In case of fire, it can prevent the flame from spreading and prevent the combustion smoke from flowing. At the same time, it also plays a role of sealing.
1.2-1.5mm thick steel plate should be used for fire door frame, 0.8-1.2mm thick steel plate should be used for door panel, and 1.2-1.5mm thick steel plate should be used for reinforcement. If the reinforcement is provided with screw holes, the thickness of the steel plate shall not be less than 3.0mm. The door leaf and door frame shall be filled with incombustible materials. The melting temperature of the door lock, hinge, bolt and other hardware accessories shall not be lower than 950 ℃.
At present, the size of fire doors is not specified in the national standard, but only the fire resistance of fire doors is required. Generally, the fire door drawings are marked with FM0615, FM0618, FM1018, FM1218, FM0921, FM1021, FM1221, FM1521, FM1821, FM2121, etc. The larger ones are FM2421, etc. As long as the height does not exceed 2100mm, these specifications and dimensions are standard.
The grade of steel fire door is the same as that of other fire doors. Steel fire doors also have grades. The grade of steel fire doors is also determined by their fire resistance time.
1. Grade A steel fireproof door
The fire resistance time of Grade A steel fire door is not less than 1.5 hours, which can be called Grade A fire door only if it meets this requirement. The interior of Grade A fire door generally uses perlite, and a small amount of it also uses vermiculite fire-proof board, foam door core board, MC compliance materials and other fire-proof materials. The thickness of Grade A fire door is generally 50 mm.
2. Class B steel fireproof door:
The fire resistance time of Grade B steel fireproof door shall not be less than 1.0 hour, and the hardware fittings used on the fireproof door must also be fireproof hardware fittings. Usually, the fire door of this grade is generally used for the entrance door of home decoration.
3. Grade C steel fireproof door:
The fire resistance time of Grade C steel fire door shall not be less than 0.5 h. The accessories used for Grade C fire doors must be treated for fire resistance and meet the specified fire resistance limit.
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