8 kinds of anti-theft doors were forced to withdraw from the market carefully to buy

A product quality monitoring result recently released by the Beijing Municipal Administration for Industry and Commerce shows that the eight brands of anti-theft door products sold in the Beijing market have quality problems such as unsatisfactory anti-destructive performance.

The main problems found in the monitoring are: the anti-theft safety door anti-destruction test failed; the door hinge and door leaf connection strength test failed. The standard stipulates that the connection between the door hinge and the door leaf, under the pressure of 6000N, the direction of the force is the opening direction of the door. There should be no displacement greater than 8mm between the door frame and the door leaf, and no concave deformation greater than 5mm on the door leaf surface; The third is that the clearance gap between the door frame lock hole and the lock tongue is unqualified. The standard stipulates that the clearance between the door frame lock hole and the Bolt (bolt) is ≤3mm. If the clearance of some products being monitored is too large, it will cause the door frame and the door leaf to close tightly after closing, and the door leaf is easy to be pried open, and the consequences are very serious. The standard stipulates that the thickness of the steel plate of the steel door frame is ≥ 2mm. The monitoring found that the thickness of some sample steel door frames is only 1.0mm. The door frames are easily deformed and cannot be closed and opened normally, which greatly reduces the service life of the anti-theft door. Fifth, the overlap width of the door frame and the door leaf is unqualified. The standard stipulates that the overlap width between the door frame and the door leaf ≥ 8mm.

Relevant experts remind consumers to refrain from buying cheap and low-quality anti-theft doors. Instead, they should go to some formal shopping malls and specialty stores to purchase, and pay attention to product models, names, batch numbers, standard numbers, factory names, factory addresses, and production dates. Whether the product identification and validity period are complete, you must obtain valid certificates such as purchase invoices when purchasing. The Beijing Municipal Administration for Industry and Commerce stated that it has forced the withdrawal of the unqualified anti-theft security door found in the monitoring from the Beijing market and dealt with the operators who sold unqualified goods according to law. After the rectification of the manufacturing enterprise, its products can only be sold in the Beijing market after being re-inspected by the national testing agency.

Comment: The anti-theft door can be opened in 4 minutes, and the quality is too bad. When can I buy things without worrying about quality?

Flat Washers

Flat washers are usually thin pieces of various shapes, used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. Such components are found in many materials and structures to perform various similar functions. Due to the limitation of the material and technology of threaded fasteners, the bearing surface of bolts and other fasteners is not large. Therefore, in order to reduce the compressive stress of the bearing surface and protect the surface of the connected parts, washers are used.

Flat Washers,Stainless Steel Flat Washers,Large Flat Washers,Flat Rubber Washers

Jiangsu Jiajie Special Screw Co., Ltd , https://www.tzbolts.com