Tell us about the appearance and composition of the security door: first.
1 door size and opening direction
It is represented by a four-digit number consisting of the width and height of the building's entrance. For example, the width of the door opening is 1 meter, and the household specification door generally has four specifications. When the height is 2.1 meters, the specifications that are commonly used for 1021 are 0920092110201021 and so on. The opening direction of the door is divided into an inner opening door and an outer opening door. The inner opening door and the outer opening door are further divided into a left opening and a right opening, and the user can select the opening direction of the door according to the direction of opening the door.
2-door appearance quality and safety
The thickness of the steel frame used for the door frame of the steel security door should not be less than 2 mm, and the materials used by the qualified anti-theft security door are in compliance with national standards. The front and rear panels of the door leaf generally use a steel plate with a thickness of 0.8-1 mm. The door leaf is provided with a skeleton and a reinforcing plate inside, and has certain anti-destructive performance and can meet the anti-theft level required by national regulations.
3 hardware safety
The performance of the anti-theft lock is directly related to the safety of the door. Anti-theft lock: The anti-theft lock is the most important part for the door. Security locks are commonly used with security locks and electronic locks. When the anti-theft lock is selected, it should be noted that the product must be certified by the national designated authority. The anti-theft lock should have the functions of anti-drilling, anti-saw, anti-smashing, anti-pull, anti-shock and anti-technical opening. The locks used on the security door are divided into a single point lock and a multi-point lock. The so-called single point lock means that the lock locks the door through the lock point of the lock itself. Multi-point lock means that in addition to its own lock point, it also drives the sub-lock, forming a plurality of lock points, and distributed around the door frame to enhance the anti-smashing performance.
Folding and opening should be welded or integrally stamped. The main locking tongue (plug) transmission device and the key part corresponding to the lock body, the anti-theft lock bolt used by the anti-theft door (plug) its extension length: the extension length of the A-class security door should be no less than 14 mm; the B level should be not less than 20 mm. The outer casing of the anti-theft lock is generally made of steel sheets having a thickness of not less than 2 mm or materials having a certain strength. Protective measures such as anti-drilling steel plate or anti-drilling sleeve shall be provided.
Mainly to support the door body, hinge: hinge is the part that connects the door and the door frame. At the same time, it should have a certain anti-theft function. At present, the hinges used in the security door are generally built-in and external. The built-in hinge is suitable for the external door. The external hinge is suitable for the inner door. For the inner door, the external hinge is used. The hinge shaft diameter is generally larger than 12 mm. Rolled steel plate, its closed edge must be welded
Four factors to consider when purchasing a security door: second.
1 certificate of conformity
And there is a production safety certificate issued by the provincial public security department (bureau) security technical prevention department issued by the security technology products. The real security door must pass the statutory testing agency to pass the test according to the specifications.
2 security level
The security level of the security door can be divided into A level, B level and C level, according to relevant specifications. Among them, the C-class anti-theft performance is the highest, the B-class is the second, and the A-class is the lowest. Most of the building materials market sees the A-class security door, which is generally suitable for general household use.
Which security door is in compliance with the A-level standard?
Under the cooperation of ordinary mechanical hand tools and portable electric tools, all-steel and flat-opening fully enclosed security doors. Its thintest link can resist the abnormal opening time of 15 minutes or more, or should not be able to cut a 615 square centimeter hole through the door.
3 locks are firm
Not only the door lock is locked, but the qualified security door generally adopts a three-position lock or a five-position lock. The upper and lower rails can be inserted into the lock to secure the door. Most doors also have a rubber seal on the door frame that does not give a harsh metal impact when the door is closed.
4 process quality
Such as open welding, non-welding, leakage welding and so on. Check whether the cooperation between the door leaf and the door frame is dense. Pay special attention to check for welding defects. Whether the gap is uniform, whether the opening is flexible, whether all the joints are dense, whether the paint plating is uniform, firm and smooth.
Brand Assurance: Brand is the hallmark of product quality and service. Brands mainly refer to product brands and dealer brands.
A compliant door is both safe and reliable. At the time of final purchase, you should also pay attention to the FA M logo, company name, and implementation specifications of the security door.
Sterile Petri Dishes from YongYue medical carries a complete line of contact plates, sterile, square (with a grid) and absorbent pad Petri dishes, cell spreaders and spatulas. Please contact us if you need additional product specifications. Two of our most popular lab dish products are standard petri dish and 3 compartment petri plate.
Sterile Agar Petri Dish
YongYue® petri dishes are offered in a variety of shapes and sizes for your everyday research needs. YongYue® manufactures optically clear plastic petri dish which are precision-molded from biomedical grade polystyrene for Cell Culture. Dishes are packed in heavy-wall polyethylene sleeves to ensure product integrity. YongYue® petri dishes have many applications including cell culture, growing bacteria and growing yeast.
Clear plastic disposable petri dishes of standard depth (15mm). Supplied in sterile packs. Will deform on autoclaving. Triple Vented. Also suitable for the temporary housing of small invertebrates during collection, or for distributing small chemical samples in class.
Diameter: 90mm
Depth: 15mm
Pack of 20
Culture Dish,Petri Dish,Petri Plate,Petri Dish Bacteria,Cell Culture Dish
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yymeds.com