First, the size and opening of the security door
Home standard doors generally have four sizes, represented by the four digits of the building's width and height.
For example, when the width of a doorway is 1 meter and the height is 2.1 meters, the specification is called 1021, and the commonly used specifications are 0920, 0921, 1020, and 1021.
The opening direction of the door is divided into the inner opening door and the outer opening door. The inner opening door and the outer opening door are further divided into the left opening and the right opening. The user can select the opening direction of the door according to the direction of facilitating opening the door.
Second, the security door surface quality and safety
The materials used by qualified anti-theft security doors are in line with national standards:
The thickness of the steel plate used in the steel security door shall not be less than 2 mm;
The front and rear panels of the door leaf generally use a thickness of 0.8-1 mm;
The door leaf is provided with a skeleton and a reinforcing plate inside, and has a certain anti-destructive performance, and can meet the anti-theft level required by the national standard.
Third, the safety of hardware
1, anti-theft lock
Anti-theft lock is the most important part of the door, and the performance of the anti-theft lock is directly related to the security of the door.
Security doors generally use mechanical and electronic locks.
When the anti-theft lock is selected, it should be noted that the product must be certified by the national authorized authority.
The anti-theft lock should have the functions of anti-drilling, anti-saw, anti-slug, anti-pull, anti-impact and anti-technical opening.
The locks used on security doors are divided into single-point locks and multi-point locks. The so-called single-point locks mean that the locks lock the door through the lock point of the lock itself.
The multi-point lock refers to the fact that, in addition to itself, the secondary lock is driven at the same time to form a plurality of lock points and is distributed around the door frame to enhance the flood prevention performance.
Anti-theft door lock used for security door (bolt) its extension:
The length of the A-class security door shall not be less than 14 mm;
Class B should not be less than 20 mm.
The housing of anti-theft lock is generally made of steel plate with a thickness of not less than 2 mm or made of a material with a certain strength. The folded edge, the opening should be welded firmly or the whole stamping molding.
In the key parts of the main bolt (bolt) transmission and the lock body, protection measures such as an anti-drilling steel plate or an anti-drill sleeve shall be provided.
2, hinge
A hinge is a component that connects a door and a door frame to each other, and mainly functions to support the door body, and at the same time has a certain anti-theft function.
At present, the hinges used for security doors generally use built-in and external hinges:
Built-in hinges are suitable for open doors, and external hinges are suitable for open doors.
For the inner door, an external hinge is used, and the hinge shaft diameter is generally larger than 12 mm.
If the hinge is rolled up using a steel plate, its closed edge must be welded.
Fourth, when buying security door should consider the factors
1, choose consumer satisfaction or after-sales service reliable home market.
2, to shop around, for the same style, the same brand of goods, from the quality, price, service and other aspects of comprehensive consideration.
3. When customizing or purchasing anti-theft doors, qualified products should be purchased from manufacturers that have obtained the “Production License Registration Certificate†issued by the public security situation.
4.Selection type Check the qualified inspection report of the recent inspection of the manufacturer or the merchant with or without authoritative inspection agency, and pay special attention to whether the production batch number and the model specification on the inspection report are the same as those on the actual product.
5, security doors must have a product tag code, including
1 Security Door Sign: FAM
2 Security level: A, B, C three levels, of which the highest level of C-class anti-theft performance, B-level second, A-level minimum, which A-level is more suitable for general household use.
6, see if the material is thick. The thickness of the steel door frame made of steel shall not be less than 2mm. The surface finish of the steel plate is high in smoothness, free of rough blisters, and the thick steel plate taps up to sound boring, weighs its weight, and roughly determines whether its door leaf is solid.
7, the structure should be reasonable. At the same time doing fine, uniform and dense solder joints.
8, when opening and locking the door, the lock is open and flexible. When the door is opened or closed, whether the door leaf is relaxed or not, there should be no jamming or collision with the door frame and sound.
9. Whether the gap between the door leaf and the door frame is too large or too small. The normal clearance should be: the left, right and top clearances should not exceed 3 mm, and the lower side should be 5 mm.
10. The door leaf and door frame must be equipped with anti-theft chain, the installation of anti-theft chain is firm, and the handle is flexible and firm.
11. The name, specification, quantity, price and amount of plastic window must be indicated on the invoice and contract.
12. Understand the names, addresses, contacts, and telephones of the organizers and manufacturers so that quality problems can be resolved in a timely manner.
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