1, certificate: the real fire door must be tested by the legal testing institutions according to the standard. It also has the production permit of the safety technology prevention product issued by the safety technology prevention department of the provincial public security Department (bureau) where the production enterprise is located.
2, level: according to the relevant standards, fire door safety level can be divided into A level, B level and C level, C level lock theft performance is the highest, B level second, A level lowest. Most of what we see in the building materials market are Grade A fire doors, which are more suitable for ordinary household use.
3, locks: qualified three commonly used fire door locks, door lock, not only from top to bottom bar can be inserted into the lock, opposite to the fixed, inferior products don't usually have three lock or customize three-point locking structure, and often does not have anti-theft function or malfunction, most of the door on the door frame and rubber sealing strips are embedded, closed the door without screeched metal banging steel fire door.
4, process quality: should pay special attention to check whether there are welding defects, such as open welding, not welding, leakage welding, slag and other phenomena, to see whether the door fan and door frame fit, clearance is uniform consistent, flexible opening, all joints are compact, paint plating is uniform firm, smooth and so on.
5. Pay attention to the "FAM" logo, enterprise name, implementation standards and other contents of the fire doors, so that doors conforming to the standards can be safe and reliable.