How to choose the security door

identify

First, the seller is required to show the "Testing Qualification Certificate" of the relevant department to check whether it meets the technical requirements of the national mandatory standard GB17565-1998.

Second, remove the cat's eye, doorbell box or lock handle, and check the internal structure of the door. There should be several reinforcing steel bars in the door, so that the front and rear panels of the door body are organically connected together. It is best to use materials such as asbestos with fire prevention, heat preservation and sound insulation functions as fillers in the door.

Third, check whether the lock adopts a special anti-theft lock that has passed the inspection of the public security department, and whether there is a reinforced steel plate for protection at the installation of the lock.

Fourth, check the process quality of the product, whether there are welding defects, whether the door leaf and door frame are tightly matched, etc.

Fifth, weigh the weight of the anti-theft door, and the weight of the regular anti-theft door should not be less than 40 kg.

identification tips

At present, the products of anti-theft doors are uneven. Some merchants operate a variety of anti-theft doors in their stores, such as grocery stores. How should consumers identify and buy qualified anti-theft doors? To summarize:

1. Grade standard: The security level of anti-theft door can be divided into Grade A, Grade B, Grade C and Grade D, among which Grade A has the highest anti-theft performance, followed by Grade B and Grade C, and Grade D is the lowest. Most of what we see in the building materials market are Class C and Class D anti-theft doors, which are more suitable for general household use.

2. Inspection of steel plates: The state stipulates that the thickness of steel plates for security doors should reach 1 mm, but in order to reduce costs, some companies only use 0.4 mm steel plates, and the thickness of the plate loses the meaning of security. According to the introduction of anti-theft door merchants, when consumers inspect the steel plate, they can press the steel plate in the door leaf. If the steel plate is pressed down, it means that the quality of the anti-theft door is not up to standard.

3. Inspection step: stainless steel is used for qualified anti-theft door steps, but some small workshops use stainless iron in order to reduce costs. When the author visited Nanchang Xinduo anti-theft door, the boss introduced a little trick for identification. Put the magnet on the lower step. If the magnet is sucked and difficult to remove, it means that the material of the step is unqualified.

4. A good lock not only has many lock points: the anti-theft door with qualified locks generally adopts three-way locks, not only the door lock is locked, but the upper and lower cross bars can be inserted and locked to fix the door. Some businesses often use more locking to attract consumers. In fact, a good lock does not mean that the more locking points the better, the lock cylinder is not anti-theft, and more locking points are useless.