How is the distinction between the level of security doors? Especially what is the difference between B and Class A, in addition to the anti-opening time is 30 minutes outside the door, door frame, lock, fill what is more
30 minutes can not open is the nonsense, 80% of the first class security door can be opened for 1 minute. Is the truth or the standard? Do not superstitious A B Bing Ding, do not superstition book that, believe in nature
Buy security and security door to four to see: a look at the certificate: security door should have the relevant departments of the test certificate, product quality should be consistent with the national standard GB - 1998 "anti - theft security door general technical conditions" technical requirements. According to the relevant standards, security level can be divided into A-level, B-class and C-class, which C-class anti-theft performance highest, B-level, A-level minimum, the general building materials market sales are mostly A-level security door, Suitable for general household use. Second, see the quality: qualified anti-theft security door frame steel plate thickness should be more than 2mm, the door body thickness is generally more than 20mm, the door weight is generally more than 40kg. Remove the cat's eye, door bell box or lock handle can see, the door of the steel plate thickness should be more than 1mm, there are several root reinforcement, so that the door front and rear panels are organically connected together, the door is best with fire, Sound insulation function of the material as a filler, hand hit the door will be issued a "pound" sound. Three to see the door lock: check whether the use of public security departments to detect qualified anti-theft special lock, the lock should be more than 3.0mm thickness of the plate to protect. Four to see the service: the installation of anti-theft door to check the key, insurance policy, invoices and after-sales service orders and other accessories and information and security door manufacturers to provide accessories and information are the same.
Level Door / Front / Rear Door Lock Level Technology Open Violence Open Class A 2.0-1.0--1.0B Level Min 5 Minutes Min 30 Minutes B Grade 2.0-1.0-1.0A Level Min 1 Minutes Min 15 Minutes
