What are the three defenses of the three proof composite anti theft door?

Anti-theft This is the basic function of the door, the door body can be anti-prie, using general hand tools, can not be pried open within 15 minutes. The door lock can be drill-proof and has a certain technological content.

The fire door body is made of metal, which can prevent the spread of open flames and smoke for a certain period of time in the event of a fire, and prevent the spread of fire.

Cold-proof, noise-proof.

There are thermal insulation materials in the door body, cold-proof and noise-proof, and the three-proof door can no longer be installed with ordinary doors.

The relevant laws and regulations of the state (hereinafter referred to as the official) do not have the "two doors" and "three doors" at all, only a separate fire door, anti-theft door, explosion-proof door, noise-proof door (or soundproof door), moisture-proof door, waterproof door, thermal insulation door, etc., the relevant departments of the state have carried out a type inspection for some categories, and the relevant accreditation certificate has been given to the qualified ones, and has never been given to a manufacturer or a certain type of door to inspect and give "two doors", "three doors", "four doors" and other doors for recognition. The reason is that after the National Fire Inspection Center conducts type inspection and approval of fire doors, the National Complete Testing Center will no longer issue relevant anti-theft approval certificates for the performance of anti-theft doors, and vice versa. Therefore, the official has never recognized the term "two-defense door" and "three-defense door".

So where do the "two-defense door" and "three-defense door" come from? This kind of reference mainly comes from the folk saying, "two doors" generally refers to steel fire prevention, anti-theft doors, "three doors.""Generally, it refers to wooden fireproof, burglar-proof and noise-proof doors.

The standard three-proof door has the following three defenses:

1. Anti-theft. This is the basic function of the door, the door body can be anti-prie, using general hand tools, can not be pried open within 15 minutes. The door lock can be drill-proof and has a certain technological content.

2. Fire prevention. The door body is made of metal, which can prevent the spread of open flames and smoke for a certain period of time in the event of a fire, preventing the spread of fire.

3. Cold-proof. There is thermal insulation material in the door body, and if you install the three-proof door, you can no longer install an ordinary door.