Why can fire doors prevent fire and smoke? The difference between Grade A and Grade B fire doors

The reason why fire doors can prevent fire and smoke is mainly due to the role of the refractory materials used in fire doors. Therefore, refractory materials play a vital role in the selection of fire doors. Therefore, fire door manufacturers should choose qualified refractory materials. In view of the importance of Qingdao fire doors to people's life safety in daily life, many fire departments will pay great attention to those buildings where fire doors should be installed. Whether the installed fire doors are in place and meet national requirements . However, despite the supervision of the fire protection unit
, accidents with fire doors cannot be avoided. Many times when a fire strikes, people discover that the fire doors in some buildings cannot prevent fire and smoke. The door was not damaged in appearance. Differences between grade A and B fire doors

In fact, the reason why fire doors can prevent fire and smoke is because fire doors are made of refractory materials, and the filling materials of fire doors are also very strong. fire resistance limit. When a fire occurs, fire doors cannot prevent fire and smoke. Most of the reasons are related to the refractory materials of fire doors. Qualified refractory materials can provide a certain fire resistance time. Some people think The biggest reason why the fire door cannot function is that the refractory material is unqualified.
Within a certain period of time, a complete door set including fire door leaves, steel fire door lumber and hardware accessories that can meet the requirements of fire resistance stability, flame shielding and thermal insulation, that is, it can be relatively maintained in a fire scene. A door with a stable shape, preventing fire smoke from penetrating and blocking heat source conduction and other basic properties can control the fire within the fire protection zone and prevent it from spreading or igniting another fire. A door with such basic properties can be called a door. For Qingdao fire doors, no matter what kind of material they are made of, they must pass the test of the laboratory designated by the Ministry of Economic Affairs. Fireproof board Fireproof board is currently the most commonly used material on the market. Its advantages are fireproof, moisture-proof, wear-resistant, oil-resistant, easy to clean, and comes in a wide variety of designs and colors. Installing fireproof suspended ceilings in building exit passages, stairwells, corridors, etc. can ensure safe evacuation of people in the event of a fire and protect people from the spread of fire.
Fire-resistant materials with such conditions are the ones that fire doors should use to protect people’s lives and property when a fire strikes. Therefore, when the fire protection unit supervises fire doors, they should also pay attention to whether the fire-resistant materials of fire doors are Comply with fire regulations
. The difference between grade A and B fire doors
If you have any questions about fire doors, we will try our best to answer them. For more details, please visit the official website of Shenzhen Tongxiao Industrial Co., Ltd. or consult the relevant staff