In addition to hardware, a set of fireproof doors includes door frames, door leaves, sealing strips, and fireproof glass. Some soundproof fireproof doors also include lower thresholds. In terms of material, it can be divided into wooden fire doors and steel fire doors. How to distinguish the quality of fire doors? It can be analyzed from the following points of view.
1. Fire door material
In terms of materials, public buildings like hospitals are more recommended to use steel fire doors. Compared with wooden fire doors, steel fire doors not only have higher strength and impact resistance, but also stronger at the hardware link. This is due to the fact that the fireproof door is filled with fireproof materials, which will cause the door leaf to be very heavy (a qualified steel fireproof door weighs ≈40KG/M²), so the door frame and door leaf are required to be installed at the position of the hinge, door closer and other hardware. , Steel fire doors can be solved by welding reinforcement plates, while wooden fire doors are prone to cracking.
Although the performance of steel fire doors is better than wood fire doors in theory, the material and processing technology of steel plates should be paid attention to in actual selection. When choosing the material, it is recommended to choose high-quality cold-rolled hot-dip galvanized steel sheet, which has better rust and corrosion resistance than ordinary steel sheets.
2. Internal filling
The standard stipulates that the filling material of the exit emergency metal door should be a non-toxic and harmless fire-proof and heat-insulating material, and be tested by a nationally recognized and authorized testing agency to meet the specified combustion performance requirements and smoke-producing toxicity hazard classification requirements;
3. Fire door accessories
The accessories of fire doors include fireproof leather strips, fireproof glass, etc. Take the fireproof leather strip as an example. It expands after being heated to block the door gap to achieve the purpose of smoke prevention. The expansion coefficient of the fireproof leather strip and the installation method may affect the final smoke prevention effect. It is recommended to use high-quality sealing leather strips with high expansion coefficient for embedded installation.
There are many fire door brands on the market, and the price gap is also very large. It is recommended to use high-quality brand fire door products.
