How to classify the level of security door?

goo | 2024-05-06 |

  [Security Door Grade] How to divide the security door grade? What is the classification of a, B, C and D security doors?

  Security door grade

  The full name of anti-theft door is anti-theft safety door. In the latest national standard "General Technical Requirements for Anti-theft Safety Door", the anti-theft level of anti-theft door is divided into four levels: A, B, C and D.

  Door frames should be 2.00mrn, 1.80 mm and l.50 mm respectively according to the anti-theft safety levels of B, C and D. The thickness of the outer panel and the inner panel of the door leaf is expressed in the form of "outer panel/inner panel", which is classified into B, C and D levels according to anti-theft safety. Choose 1.00 mm/1.OO mm, 0.80 mm/0.8O mm, 0.80 mm/0.6 mm General household security doors are mainly Class C and Class D. The higher the level, the higher the anti-theft performance.

  Security door lock core standard

  In addition to the door itself, the door lock is also the key to anti-theft. The country divides the lock core of anti-theft door into three grades:

  Class A is the most primitive and unsafe lock core. The owner’s key is flat, with only single-sided and single-row bullet slots, and some cross keys also belong to Class A. This kind of lock can be opened in about two or three minutes, and it will be faster for a skilled hand.

  Class B is a safer level. From the key point of view, it is a double-sided double-row bullet slot. If such a lock has tools, it will take a skilled worker about 10 minutes to open it.

  Super B-class lock is the safest level at present. From the key, there is a double-sided double-row bullet slot with a blade or curve next to it. This lock core design technical standard needs to be opened for more than 280 minutes, and it takes an hour for a skilled locksmith.

  Classification of security doors

  Specific thickness

  The thickness of steel plate determines the strength of impact resistance. Thickness of cold-rolled steel plate for doorframes: Grade A, B, P and D are 2 mm, 2-1.8 mm, 1.8-1.5 mm and 1.5 mm respectively. Thickness of outer plate of door leaf: Grade A, B, P and D are 1 mm, 1 mm, 0.8 mm and 0.8 mm respectively. Thickness of inner plate of door leaf: Grade A, B, P and D are 1 mm, 1-0.8 mm, 0.8 mm and 0.6 mm respectively.

  Specific filler

  The state stipulates that the worst security doors should be filled with honeycomb paper. According to the different brands of security doors, the fillers of Grade A doors are different, some are aluminum silicate rock wool (fireproof cotton), some are aviation honeycomb aluminum, and some are aluminum foil. Aluminum silicate rock wool and aluminum foil are usually used for Class A security doors. Aluminum silicate rock wool has good thermal insulation, fire prevention and sound insulation properties. Aluminum foil is light in weight, corrosion-resistant, non-toxic and tasteless, and has good thermal conductivity, heat resistance and low temperature resistance. Under normal circumstances, Class B security doors are made of rock wool and polyurethane foam. The advantage of rock wool is that it has a good flame retardant function and is a poor conductor of heat. Polyurethane foam has no gap after filling, and it is strongly bonded after curing. Shock-proof and compression-resistant, it does not crack, rot or fall off after curing, and has ultra-low temperature thermal conductivity and heat preservation resistance. Efficient insulation, sound insulation, waterproof and moisture-proof after curing. Honeycomb paper is commonly used in the market for C-grade and D-grade filling, which basically has no heat preservation, fire prevention and sound insulation performance.

  Bi locks

  Anti-theft lock is the most important part of the door, and its performance is directly related to the safety of the door. The security door produced by regular manufacturers will have a intaglio "security level mark" in the upper left corner of the door. The anti-theft level of Class A security door lock is Class B, that is, advanced protection level; For the B, C and D security doors, the anti-theft level of the locks is A, that is, the general protection level. Damage prevention time is obviously different because of different levels. Not less than 30 minutes for Grade A, 15 minutes for Grade B, 10 minutes for Grade C and 6 minutes for Grade D.. At the same time, observe the number of locking points between the door frame and the door leaf. There should be no less than 12, 10, 8 and 6 Class A, B, C and D security doors respectively.

  How to judge the quality of the same level of security doors?

  The security door can be said to be the escort of the whole room, which is generally mainly used for the installation of the entrance door of the room. According to the different degree of security, the security door in the domestic market can be divided into four different grades, namely, A, B, C and D. Among them, the security performance of Class A is the lowest, and the security doors of other grades increase in turn. But how should consumers choose the quality of such security doors if they are faced with the same level of security doors? Well-known Chengdu security door enterprise-Daqianmen related professionals will make the following analysis for you:

  In addition to observing that there is no bubble on the surface of the paint layer and the color is uniform, if the level is the same, the security door with greater weight, more locking points, denser steel skeleton and more locks will have better quality. Because it is difficult for consumers to see the skeleton of the security door when buying indoor security door products, Daqianmen suggests that consumers can refer to the product section (profile) provided by the security door merchants, and can also judge from the weight. Generally speaking, the greater the weight, the denser the steel skeleton inside, the stronger and safer the door, and the lock is also an important standard of the security door’s anti-theft performance, and the lock protection includes the prevention drill and the protective sleeve, in which the prevention drill covers the lock head (eye). The protective sleeve is to wrap several pieces of steel on the lock in the door. These two protective measures can prevent the lock from being damaged by people and so on.

  In short, the above are some simple methods to judge the quality of the same level of security doors. How to choose and buy security doors specifically requires consumers to know the knowledge of security doors before buying them, and then make careful selection.

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