Identification of security door

1.Require vendors to produce the relevant departments of the inspection certificate.
2.Remove the cat's eye, the doorbell box or the lock handle, check the internal structure of the door body. There should be a number of reinforcing bars in the door, so that the front and back

panels of the door body are connected together. Preferably with fire, heat preservation, sound insulation function of the material as a filler, such as asbestos.
3.Check whether the use of a qualified special anti-theft lock, the lock is installed in a reinforcing steel plate for protection.
4.Process quality inspection of products, whether there are welding defects, the door and the door frame is dense.
5.The weight of the steel security door is generally not less than 40 kg.