I remember that in the past, the security doors in the house were all kinds of steel bars stretching vertically and horizontally. It was necessary to install a soundproof and heat-insulating door inside, and there was only a strong anti-theft feature for the open-door door. Today's security doors can be said to be a combination of the past two doors, a hard and thick steel door with an anti-theft lock, can completely isolate the unsafe factors outside the home.
When we handed over personal and family property to this unique anti-theft door, have we ever thought that if it is not strong enough and not real enough, if it is a little tricky and a bit thin, it will mercilessly fail our trust?
When there is only one door left between the home and the outside world, we need to be safe, secure, and not light and thin.
News playback
Why can't security doors be opened?
Seemingly solid security doors, the door panels and door locks are weak, and thieves can easily break or unlock the room. CCTV recently broadcast the "Weekly Quality Report" column issued a question: Why has the security door become so unbearable? The reporter visited the anti-theft door market and found that some manufacturers used protective doors, anti-smashing doors, or even armored doors to sell the anti-theft door. The election materials also cut corners and materials, and the retail price of some security doors was as low as three or four hundred yuan. According to relevant sources, many anti-theft doors do not need to be embarrassed, and they can be opened without damage, traces, and technology. The rate of complaints against theft prevention of security doors is increasing.
The quality supervision department of the State Department recently discovered that 70% of the products of the small anti-theft door factory were unqualified. Many security door manufacturers replaced the steel plate with iron sheet, which caused the security door to be easily deformed by external forces. Some of the low-end products use cardboard and honeycomb paper as filling materials. They collapse over time and do not have security, sound insulation, and insulation properties. Production of anti-theft doors must be issued by the public security department "production license registration certificate," but according to reporters visits, more than 30% of the brand can not provide the card.
Industry Express
Security door will be introduced new national standard
In the face of a series of irregularities in the anti-theft door market, a new standard-setting seminar composed of experts from the Ministry of Public Security and three domestic security door manufacturers has recently been held in Wuxi and the original national standard was revised. Including the abnormal opening time of the security door is determined as 30 minutes, 15 minutes, 10 minutes and 6 minutes; the length of the locking tongue is specified as not less than 16 mm; the number of locking points is not less than 8 points and so on. The introduction of these new regulations will play an extremely important role in standardizing the production and sales of security doors.
In response to the status quo of the “security door†and “entering the doorâ€, the status quo of the anti-theft door market, this time in the development of new standards has specifically made a new provision, that is, from next year, all anti-theft The door must be marked with security grades (A, B, C, D, and T) on the upper left corner of the door, and be permanently attached to the upper corner of the hinge in the form of Arial gravure, 1.60 meters above ground level, positive and negative Error 10 mm position. Specific time for the full implementation of the first quarter of 2007. Experts said that only the anti-theft door can be used to mark this, which will effectively and intuitively prevent miscreation of the anti-theft door and allow consumers to buy real anti-theft anti-theft doors.
Experts how to pick the security door
Security doors are a part of the decoration process that is easier to ignore, but it is the most important part. There is a good door where you can “remember everything you want to do and never open up†so that you don’t have to worry about your life. How to identify the advantages and disadvantages of security doors, we ask the relevant experts to help you:
1, grade standards: security door security levels can be divided into A-level, B-level and C-level, of which the highest level of C-class anti-theft performance, B-level second, A-level minimum. Most of what we see in the building materials market are Class A security doors, which are more suitable for general household use.
2, view the filler: Now more standard filler is a foaming agent, can be insulation, sound insulation, the disadvantage is that some of the poor fire performance, but there is no problem to achieve anti-theft effect. Even better is slag wool. It is best to let the manufacturer specify what kind of filler to use at the time of purchase. Look at the anti-theft door. Generally, you can see what is inside the cat's eyes by unscrewing it from the door. If some cat eyes are already in place, and It can't be screwed down, but it can be watched when it is locked. If you find that the filler is not correct, you can discuss it with the manufacturer.
In addition, you can also look at whether there is a burglar-proof keel lining in the anti-theft door. The anti-theft keel generally has two grid-like and S-shaped, S-shaped material, but no grid-like solid. If there is no security keel, the security will be greatly reduced. 3, check the steel plate: Although the surface of the security door is made of steel, but the steel and steel are not the same. According to the state regulations, the thickness of steel plates for security doors should reach 1 mm, but the thickness of anti-theft doors produced by some small workshops is simply not reached, and some are only 0.4 mm. Slab thinning loses the meaning of anti-theft, and it is opened with something.
In addition, the steel plate of the security door must be guaranteed to be a cold-rolled plate. Cold-rolled sheets have good stretchability and toughness, but they are more expensive. Therefore, some manufacturers use hot-rolled sheets instead of them in order to save costs. The easiest way to identify security doors is to knock on the door by hand and hear the sound, indicating that the thickness of the steel plate is sufficient and the filling is real. If the sound sounds "squeaky", it means that the thickness of the steel plate is not enough.
4, a good lock is not more than a lock point: many selling anti-theft door in the promotion when they say that their own anti-theft door lock point more, in fact, this is only a ramble to attract customers. Really good locks are not as good as lock points. There are no essential differences between 4 lock points and 10 and 20. Regardless of the number of lock points, the center is on the lock cylinder, the lock cylinder is broken, and more lock points are useless. The security doors with qualified locks generally use three-dimensional locks. Not only are the locks locked, but also the upper and lower cross bars can be locked to lock the door.
5, process quality: should pay special attention to check whether there are welding defects, such as open welding, no welding, missing welding, slag inclusions and so on. Look at whether the door leaf and the door frame are compact, whether the gap is uniform, whether the opening is flexible, whether all the joints are dense, and whether the paint plating is uniform and smooth. Good quality anti-theft doors have rubber seals embedded in the door frame and do not emit harsh metallic impact sounds when closed.
6, beware of the renovation door trap: buy anti-theft door but also to avoid the renovation door trap, some street stores selling anti-theft door will recover some of the old security door, and then renovate and then sell. You can observe the turnkey process.
Under normal circumstances, the new anti-theft door packaging is intact, the installation workers packaged in front of the customer's face, the key inside the packaging, the key packaging is complete, in front of the customer's face to install the lock core, after the lock Then give the key to the customer. If the door's packaging itself is damaged and the key is in the pocket of the worker, it may be a door to renovate.
It is best for consumers to purchase anti-theft doors in the formal home building materials city, because the regular building materials city sales anti-theft door must be approved by the Public Security Bureau Special Branch, and the building materials city generally also requires the presence of businesses to provide proof of sales of anti-theft doors. In addition, you should also check production registration approvals, quality verification certificates, inspection reports, fire inspection reports, and leak detection reports.
7, buy less than 700 yuan: the current market, 1 mm thick steel panel 7200 yuan per ton, door frame hot-rolled steel plate 6,500 yuan per ton. If it meets the national standard, the cost of a steel plate for a security door will cost 500 yuan, plus the cost of locks, fillers, and paint, the cost price will generally not be less than 700 yuan, and the qualified anti-theft door frame weight should be more than 60 kg. , Below this price and underweight security door, consumers need to buy it carefully.
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Coal Activated Carbon For Water Purification
Use: Usedin the purification of drinking water, in-depth treatment of water water etc.
Spec.:
|
Model NO.
|
Moisture(%)
|
Strength(%)
|
Idine value(mg/g)
|
methylene blue value(mg/g)
|
Ash(%)
|
Packing density(g/L)
|
pH-value
|
Grain diameter(mm)
|
| DX-3060 |
≤3
|
≥90
|
≥950
|
≥140
|
≤10
|
530±20
|
8-10
|
Φ1.5
|
| DX-3070 |
≤3
|
≥90
|
≥950
|
≥150
|
≤10
|
500±20
|
8-10
|
-
|
| DX-3080 |
≤3
|
≥90
|
≥950
|
≥150
|
≤10
|
490±20
|
8-10
|
-
|
| DX-4060 |
≤5
|
-
|
≥950
|
≥150
|
≤15
|
-
|
8-10
|
-
|
| DX-4070 |
≤5
|
-
|
≥950
|
≥150
|
≤15
|
-
|
8-10
|
-
|
Coal Activated Carbon For Water Purification
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