How to identify the quality of security door?
Asked the seller to produce the relevant departments of the "test certificate of compliance" to check whether the national mandatory standards GB-1998 technical requirements. Remove the cat's eye, door bell box or lock handle, check the door body structure. The door should have a number of reinforced steel, so that the front and rear panels are organically connected together. The door is best to have asbestos and other fire, insulation, sound insulation function of the material as a filler. Check whether the lock has been used by the public security department to detect qualified anti-theft special lock, in the lock installation site to strengthen the steel plate to protect. Check the quality of the product, whether there are welding defects, doors and doors with the dense and so on. Weigh the weight of anti-theft door, the amount of regular security door is not less than 40 kg.
From the cylinder, the thickness of the steel plate, the internal filler. Anti-theft door there is a national standard, B / C Ding, in the door can be seen inside. Class A highest, Ding times the most times. Lock core is divided into A and B type, B-type anti-technology to open about half an hour, A-type anti-technology to open about five minutes. There is also a non-standard but better than the B-type super B-type cylinder. Good anti-theft door is generally filled with fire rock wool or aviation aluminum foil. Ya Dili music, Jingjing, cloth Yang are first-line brand.
The first way is to look at the permanent mark. In accordance with the provisions of the new standard, each security door must have a permanent mark (security level): by the Chinese code (A, B, C, D) and plane round composition, the Chinese code is located in the plane round, Permanently fixed in the inner side of the hinge on the edge of the distance from the ground height of 1600 mm ± 100 mm in the position of Cao Gan 丨 dry check sucking through the body. "The second way is to observe the number of locks between the door frame and the door. "Yang Yucai said that the so-called lock points is to connect the door frame and the door of the connection point, in accordance with the security level of security, A, B, C, D four levels of lock points should be no less than 12, 10, 8 And 6. "The third way is to judge from the price, A-level security door price of 1,800 yuan, while the level of security doors in the 1000 or so. A sub-price of goods, two or three hundred yuan of security door quality is certainly difficult to guarantee. "
