What are the precautions for buying security doors?

Class A: It is the original unsafe lock cylinder, the key is flat, only a single-sided single-row bullet slot, including some cross keys, such a lock can be opened in about two or three minutes, and the familiar hand will be faster.

Class B: It is a safer level, it is a double-sided double-row bullet slot from the key, and if there are tools, it will take about 10 minutes for a skilled worker to open the door.

Super B level: is the current level of security, from the key is a double-sided double-row bullet slot, and there is a blade or curve next to it, such a lock cylinder to open it takes more than 280 minutes, the general skilled locksmith also has to spend an hour.

Security door level differentiation:

1. Specific thickness: The thickness of the steel plate determines the strength of the impact resistance.

1) The thickness of the cold-rolled steel plate of the door frame: 2 mm for grade A, mm for grade B, mm for grade C, mm for grade D.

2) Thickness of the outer plate of the door leaf: 1 mm for grade A, 1 mm for grade B, mm for grade C, mm for grade D.

3) Thickness of the inner plate of the door leaf: 1 mm for grade A, mm for grade B, mm for grade C, mm for grade D.

2. Than fillers.

1) Grade A doors are filled differently according to different brands, aluminum silicate rock wool (fireproof cotton), aviation honeycomb aluminum, aluminum foil.

Features: Aluminum silicate rock wool has good thermal insulation, fire and sound insulation properties, aluminum foil is light in weight, corrosion resistance, tasteless, and has good thermal conductivity, heat resistance and low temperature resistance.

2) Class B anti-theft door is made of rock wool and polyurethane foam.

Features: Rock wool has a good flame retardant function and is a poor conductor of heat; The polyurethane foam is filled without gaps, and the bond is strong after curing. Shockproof and compressive, no cracking, no corrosion, no falling off after curing, with ultra-low temperature thermal conductivity, heat preservation resistance.

Efficient insulation, sound insulation, waterproof and moisture-proof after curing.

3) Grade C and Grade D filling, the general market is honeycomb paper.

Features: Basically no thermal insulation, fire protection and sound insulation performance.

3. Locks: anti-theft locks are important components for the door, and the performance of anti-theft locks is directly related to the safety of the door. The anti-theft door produced by the regular manufacturer will have a "security level mark" with a Song body gravure in the upper left corner of the door.

1) The anti-theft level of Class A anti-theft door locks is Class B, that is, the advanced protection level.

2) Class B, C and D anti-theft doors, the anti-theft level of the locks is Class A, that is, the ordinary protection level.

1.First determine whether your residential complex is secure to determine the level of security door you choose. The real security door is divided into four levels: A, B, C, D. The level is marked in the form of a stamped on the inside of the door leaf or on the door frame (with Chinese characters in the circle).

2.Generally speaking, household D grade can be (the price is less than 1,000 yuan, the front and back of the door, the door frame, technical and violent opening is not less than 6 minutes), if the community is not safe, you can choose better. If you don't know much about anti-theft doors, if the economy allows, choose the first-line brand door (top ten brands), and the after-sales service is guaranteed.

3.Consider the environment in which you live to choose the thickness of the door leaf, 5CM, 7CM, 9CM, the thicker the door leaf, the better the sound insulation effect.

4.Choose a universal lock security door, that is to say, try not to buy a door equipped with patented lock accessories, because in the future, if the parts are broken, you can match it in any house, and the price is relatively cheap. (If you don't mind changing your security door often, that's another story).

5.Try to choose a metal handle, if you look at the style with a bad handle material, you can negotiate with the merchant to replace.

6.Concealed hinges (concealed hinges), Class D doors should have at least 4 adjustable concealed hinges, which can be fine-tuned when the door is dropped, and it is more beautiful and safe to hide inside.

7.Choose a doorbell and a cat's eye one, this kind of accessory is everywhere, and it is more convenient to replace it after the expiration date.

8.Stainless steel is in lower gear, and there is a kind of "stainless iron" on the market that will rust after a long time, which looks dirty and cannot be wiped clean.

In addition: if only one worker goes to the installation, you had better help when playing the expansion screws, although one person can also install, the vibration of the screws may change the original position of the door, although it can also be adjusted, but it is still not a solid effect in place.

The following four points should be paid attention to when purchasing an anti-theft door:

1. While considering the price and appearance, pay attention to product quality, and buy brand security doors in the reputable building materials market;

2. Check the inspection report of the anti-theft security door provided by the operator, and the test results should meet the GB17565 1998 "General Technical Conditions for Anti-theft Security Doors". Pang Xuan bald climb owes a hazy dripping sneer?

3. Distinguish the difference between the anti-theft security door and the metal door, do not believe the propaganda of the sales staff, and the operator should indicate the anti-theft door in the product name column when ordering, so as to prevent the illegal operator from passing off the anti-theft door with "steel door", "protective door", "anti-pry door", "armored door", etc.;

4. When installing, check whether the appearance of the anti-theft door is the same as the ordered sample, and ask the delivery personnel for warranty cards, invoices and other documents, so as to protect rights in time if there is a problem. You can also visit the website of the Beijing Consumers Association for more information.

Notes:

Certificate of Conformity: The real anti-theft door must be tested by the statutory testing agency according to the standard, and there is a safety technology protection product license issued by the provincial public security department (bureau) where the manufacturer is located.

Security Level: According to the relevant standards, the security level of the security door can be divided into Class A, Class B and Class C, of which Class C is anti-theft.

It can be the highest, followed by B-level, A-level is the lowest, most of the things we see in the building materials market are A-level security doors, which are generally suitable for general family use.

Secure locks: Qualified anti-theft doors generally use three-way locks or five-way locks, not only the door lock locks, but also the upper and lower crossbars can be inserted and locked to fix the door. Most doors also have rubber seals embedded in the door frame, which makes a screeching metal crash sound when the door is closed.

Workmanship Quality: Special attention should be paid to checking whether there are welding defects, such as open welding, unwelding, missing welding, etc. See whether the fit between the door leaf and the door frame is dense, whether the gap is uniform, whether the opening is flexible, whether all joints are dense, and whether the paint plating is uniform, firm and smooth.

Brand Assurance: Brand is a sign of product quality and service. Brand mainly refers to product brand and distributor brand.

When buying security doors in the market, it is best to buy them in a regular large home building materials city. When purchasing, you should also pay attention to the "FAM" mark of the security door, the name of the enterprise, the implementation of the standard, etc., and the door that meets the standard can be both safe and reliable.

As a guarantor of home security, the anti-theft door should pay attention to the following points when purchasing: 1. The performance and structure of the door lock of the gate: choose the anti-drill lock, the lock requires a three-way locking structure, 3 hinges for a single door, 6 hinges for double doors, and a dark lock for the door leaf and door frame.

2. Look at the number of locks on the door and the number of rods: it is best to choose 2 locks to control the door with 2 rods each. 3. Look at the thickness and area of the surrounding reinforcing plates:

The lock heart guard should be a cold steel plate with a thickness of more than 2 mm, and the height of the heart guard plate should not be less than 500 mm. If it is a closed security door, the rest of the cold steel plate should also be more than millimeters. 4. Look at the quality of the process:

The selection of security door materials is fundamental, and the quality of the manufacturing process is the key. Particular attention should be paid to checking for welding defects. 5. Look at the design:

The security doors on the market are divided into three categories: luxury, mid-range, and ordinary. Consumers can choose their favorite types according to their own situation.

1. Formal qualified companies will have quality qualification standard certificates, inspection certificates, etc. issued by the state, which can be directly queried on the Internet. Without these certificates, the quality of the security door is not guaranteed at all.

2. Personal experience is convenient and better identification. A good anti-theft door panel is slightly thicker than the general material, and you can listen to the sound by tapping to determine whether it is dense; Weights can also be distinguished to see how thicknesses are compared to each other.

3. If you want to further identify, you can use a screwdriver to remove the cat's eye or door handle to check the structure inside the door. Check whether there are defects in the fireproof materials, whether there are defects in the welding area, whether the lock is protected, etc.