Anti-theft doors are the first choice for general home entrance doors and are also the first threshold to protect the safety of family living. Their importance is self-evident. The price of security doors ranges from 1,000 to 5,000 yuan, and many friends believe that they can only see the difference in surface color. So how to choose a home security door? If you buy according to these three points, thieves will go around when they see it.

Safety

1. Preferred Class A grade

Published in total Two general technical conditions for anti-theft security doors, GB 17565-1998 and GB 17565-2007. In the 2007 document, the division method of anti-theft doors A B C was changed to A, B, C and D.

JYBD corresponds to the four security levels of A, B, C and D, such as FAM-B-2110, which represents a company’s Class C security door. The following are the designs of the door itself of four different levels of anti-theft doors, which are different in terms of anti-destruction capabilities. The specific parameters are as follows:

The thickness of the Class A door frame is 2.0MM, and the number of locking points is 12 , the anti-vandal opening time is greater than or equal to 30 minutes.

The thickness of the Class B door frame is 2.0MM, the number of locking points is 10, and the anti-vandal opening time is greater than or equal to 15 minutes.

The thickness of Class C door frame is 1.8mm, the number of closing points is 8, and the anti-vandal opening time is greater than or equal to 10 minutes.

The thickness of Class D door frame is 1.5MM, the number of locking points is 6, and the anti-vandal opening time is greater than or equal to 6 minutes.

The door panel thickness, anti-vandal time, and lock level of anti-theft doors also decrease from A to D. Class A anti-theft doors have the best performance.

The security door grade stamp of a regular manufacturer must be stamped on the 1.6-meter-high hinge on the inside of the door. What is stamped on the door leaf is likely to be a fake security door.

2. Look for the FAM mark

In addition to the Grade A steel seal on the door, you should also check the quality inspection report to see if there is a FAM mark. Without the FAM anti-theft mark, even if it has a Class A steel seal, it cannot be called an anti-theft door.

Lock cylinder

Generally, criminals use technical techniques to open locks, so a good lock cylinder is the key to the performance of an anti-theft door. The lock of the anti-theft door Cores are divided into three types: Grade A, Grade B, and Super Grade B (Grade C).

A-level lock keys are arranged in a uniform order and can be opened in less than 1 minute. The key is extremely easy to copy and can be made by rubbing it with a file or other tools.

B-level keys are plate keys, using two rows of parallel marbles, and can be opened within 5 minutes.

Class C lock core: double blade groove double row + single blade type double blade + single row type

C level key: blade Type + inner groove or blade type + outer milled convex groove.

C-grade lock cylinder cannot be pried open in 4 hours, and it will take more than 10 minutes to open even if you are skilled. If you try to use a forceful twisting tool to unlock the lock, the lock cylinder will automatically lock and cannot be unlocked.

Super B-level lock cylinder is the definition of this super-B-level lock developed internally by the company, which is a lock that exceeds the ordinary B-level lock industry standards. It was born between 2004 and 2015. At this time C-level locks have not been defined yet.

Super B-level lock cylinders are safer. No locksmith company can open it in 30 minutes. The key looks like this:

Door panel

1. Double-layer galvanized steel plate material

For anti-theft doors, the door panel core The material is also very important. When we buy anti-theft doors in the market, we can knock them with our hands. If it sounds hollow, it may be honeycomb paper, which has poor anti-theft effect; when knocked, it makes a harsh sound like an iron sheet, indicating that the door is hollow inside and the metal on the outside is very thin, so it is not recommended to choose it.

The best one is not recommended. Made of double-layer galvanized steel plate and covered with fireproof rock wool board, the knocking sound is calm and powerful. It is a recognized security and anti-theft door combination. The thickness of the door frame exceeds 2mm. , the thickness of the door body is greater than 20mm, the length of the main lock tongue must not be less than 16mm, and the door edge is covered with sealing strips for thermal insulation and sound insulation.

2. Electronic camera

In the past, old-fashioned security doors would have cat eyes to see the outside clearly. However, there are security risks. By opening the peephole, criminals can use a hook to open the door through the hole, and the lock can be unlocked in five minutes.

Now the cat eye has been improved and replaced with an electronic camera, which is also used to see the outside clearly. When someone approaches and stays at the door for a long time, it will be captured and the mobile phone will receive an alert immediately. The safety factor of such anti-theft doors has been significantly improved.

3. Anti-pry hinges

It is more reliable to have anti-pry hinges on the anti-theft door. The anti-pry points will get stuck after closing the door. ,There are four anti-pry hinges on the upper and lower sides to effectively prevent technical prying.