How to buy an security door? Those brands are a little bit better

Wang Li. This brand is used by my family and my sister's family, and this brand is also used for the newly bought house. It may also be the reason why other brands have not been used, hehe.

(1) Certificate: The real anti-theft door must be tested by the statutory testing agency according to the standard, and there is a safety technology protection product license issued by the provincial public security department (bureau) where the manufacturer is located.

2) Grade: According to the relevant standards, the security level of the anti-theft door can be divided into A-level, B-level and C-level, of which C-level anti-theft performance is the highest, B-level is second, A-level is the lowest, most of what we see in the building materials market are A-level anti-theft doors, which are more suitable for general family use.

3) Process quality: special attention should be paid to check whether there are welding defects, such as open welding, unwelding, missing welding, slag inclusion and other phenomena. See whether the fit between the door leaf and the door frame is dense, whether the gap is uniform, whether the opening is flexible, whether all joints are dense, and whether the paint plating is uniform, firm and smooth.

4) Locks: Qualified anti-theft doors generally use three-way locks, not only door locks, but also upper and lower crossbars can be inserted and locked to fix the door. Inferior products generally do not have a three-point lock or optional three-point lock structure, and do not have anti-theft functions or often malfunction.

Most doors also have rubber seals embedded in the door frame, which makes a screeching metal crash sound when the door is closed.

5) When purchasing, you should also pay attention to the "FAM" logo, enterprise name, implementation standards and other contents of the anti-theft door, and the door that meets the standard can be both safe and reliable.

Anti-theft door lock cylinder size selection: Before changing the lock cylinder, we must first know what size and specification the lock cylinder of our home is, and only the lock cylinder of the same size can be changed, so we must remove the lock cylinder at home and measure the size.

Identify the lock cylinder of the anti-theft door: the lock cylinder of the anti-theft door can be identified by the number of bullet rows, generally speaking, the multi-row bullet lock is better than the single-row bullet lock, and the multi-row invisible bullet lock is better than the ordinary multi-row bullet lock. The cost of B-level locks is higher than that of A-level locks, which shows that the super B-level anti-theft door lock cylinder is safer than the B-level anti-theft door lock cylinder, and the B-level anti-theft door lock cylinder is safer than the A-level lock, if you feel that your own anti-theft door lock is not safe, you can consider changing to a B-level lock or super B-level lock with a high anti-theft level.