How to buy security door
Security door appearance and composition
1. The size and opening of the 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.
2. Door surface quality and safety
The materials used in qualified security doors are all in line with national standards. The thickness of the steel security door frames should not be less than 2 mm. The front and rear panels of the doors should have a steel plate thickness of 0.8-1 mm. There are skeletons and stiffeners, and they have some destructive performance and can meet the anti-theft levels required by national standards.
3. Hardware safety
(1) Anti-theft lock: The anti-theft lock is the most important part of the door. The performance of the anti-theft lock is directly related to the security of the door. The mechanical lock and electronic lock are generally used for security doors. 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. Multi-point lock refers to the fact that in addition to its own lock point, it also drives the secondary lock to form multiple lock points and is distributed around the door frame to enhance the flood prevention performance.
The extension length of the anti-theft lock bolt (bolt) used in security doors shall be not less than 14 mm for class A security doors and not less than 20 mm for class B. The housing of the anti-theft lock is generally made of a steel plate with a thickness of not less than 2 mm or made of a material with a certain strength. The edge is folded, and the opening is to be fastened or formed integrally. 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) Hinges: Hinges are the parts that connect the door and the door frame to each other, mainly play the role of supporting the door body, and should have a certain anti-theft function. At present, the hinges used in security doors generally use built-in and external hinges. The built-in hinges are suitable for open doors. The external hinges are used for internal doors. For the internal doors, external hinges are used. The diameter of the hinge shaft is generally larger than 12 mm. With steel plate rolling, the closed side must be welded.
The security door should consider the factors
1. Choose the home market where consumer satisfaction or after-sales service is trustworthy.
2. To shop around, consider the same style, the same brand of goods, comprehensive consideration from the quality, price, service and other aspects.
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 Bureau.
4. Check the manufacturer's or the merchant's qualified inspection report for the recent inspection by an 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. The security door must have a product tag number, which includes:
(1) Anti-theft security door sign: FMA
(2) Security Level: Grades A, B, and C are classified into three levels, of which the highest level of anti-theft performance is at level C, followed by level B and level A. The level A is more suitable for use by the general family.
6. See if the material is thick. Steel door frame production of steel, its thickness should 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, the workmanship is fine and the solder joints are even and dense.
8. When opening and locking the door, is the lock open 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 audible noise.
9. The clearance 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 shall be equipped with anti-theft chain, the installation of the anti-theft chain is firm, and the handle is flexible and firm.
11. The name, specification, quantity, price and amount of the security door must be specified on the invoice and contract.
12. Understand the names, addresses, contacts, and telephones of the organizers and manufacturers so that the quality can always be solved in a timely manner.
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