Fire doors are very common but unfamiliar name in life for many people. You can always see it every day, but its definition and classification are always ambiguous. But in fact, fire doors are very important to ensure the fire safety of our daily lives. It is necessary to know more about it. The following is the basic knowledge of fire doors for you.
-Components of fire door
Fire door refers to a door that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time, together with the frame. The main components of fire doors include door leaves, door frames, glass, door locks, handles, hinges and door closers.
-Fire resistance rating of fire door
According to the different fire resistance limits, fire doors are divided into three grades: A, B, and C, and the fire resistance limits are not less than 1.5h, 1h and 0.5h respectively.
-Fire door material
According to different materials, fire doors can be divided into steel fire doors, wooden fire doors and glass fire doors.
Wooden fire door refers to a door that uses wood or wooden products as door frames, door panels, and skeletons, fills the door with non-combustible materials, and is equipped with hardware parts that can meet the requirements of fire-resistant stability, integrity and heat insulation.

Steel fire door refers to a door that uses cold-rolled thin steel plates as the door frame, door panel, and frame, and fills the door leaf with non-combustible materials, and is equipped with hardware parts that can meet the requirements of fire-resistant stable parts, integrity and heat insulation. Glass fire door refers to a steel fire door with fire-resistant glass as the door panel.
-Fire door structure
According to the structure classification, fire door can be divided into eight categories: single leaf, double leaf, single leaf with glass, double leaf with glass, single leaf with bright window, double leaf with bright window, single leaf with glass and bright window, double Fan with glass and bright windows.

Check the appearance, the high-quality steel fire door is welded firmly, and the welding points are evenly distributed. The outer surface is sprayed smoothly. There should be a product mark, a quality inspection mark and a quality certification (approval) mark at the specified position. The qualified wooden fire door should have a complete appearance, no damage, clean surface, no planing marks, burrs and hammer marks. Cut corners and seams should be tight and flat.

Check the figures, the external dimensions of qualified products should be less than or equal to the external dimensions in the sample description. The thickness of the door leaf should be greater than or equal to the thickness of the door leaf in the sample description, and the width of the door frame side wall should be greater than or equal to the width of the door frame side wall in the sample description.

The outer dimensions of the fireproof glass should be less than or equal to the outer dimensions of the fireproof glass in the sample description. The thickness of the fireproof glass should be greater than or equal to the thickness of the fireproof glass in the sample description.

Look at the seals, qualified steel and wooden fire door should be equipped with fire seals. The sealing strip should be straight and without arching. And there is a qualified inspection report issued by a national inspection agency.

Estimate the weight, and the fire door of qualified quality are generally heavier. And those very light fire doors must be counterfeit products.

Check the certificate, the fire door is a product included in the type approval system. Products need to be type tested before they are sold. The general type inspection report describes in detail the size, composition, material, and product photos of the sample. In actual purchase, the type inspection report must be obtained from the manufacturer.

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