1. Fire door type approval mark and fire door ID card tracking management mark, as shown in the figure.

2. Fire doors are approved by a laboratory designated by the Ministry of Economic Affairs. According to the new version of the national standard for fire doors GB_12955-2008, which was implemented on January 1, 2009, the fire door fire resistance test method has passed the test and has obtained the economic Those that are issued verification certificates and authorization marks by the Ministry of Standards and Inspection Bureau are called fire doors. According to the US NFPA and IBC specifications, a "fire door" is defined as "any combination of fire door leaves, door jambs, hardware and other accessories that can simultaneously provide a certain degree of fire protection for the opening."

3. Basic concepts:

(1) Fire door refers to a door that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain period of time. It is a fire-resistant partition with certain fire resistance located in fire-resistant partitions, evacuation stairwells, vertical shafts, etc.

(2) In addition to the function of ordinary doors, fire doors also have the function of preventing the spread of fire and smoke. They can prevent the spread of fire within a certain period of time and ensure the evacuation of personnel.

4. Features: Fire doors have the characteristics of smooth surface, beautiful appearance, flexible opening, strong and durable, easy to use, safe and reliable. There are many specifications for fire doors. In addition to the door opening dimensions stipulated in the national unified modular system for building door and window openings (GBJ2-73 "Unified Modular System for Building Doors and Windows"), they can also be customized according to user requirements.