What are the national regulations for the quality of fire doors

2021/06/04
What are the national regulations for the quality of fire doors
Fire doors are designated by the Ministry of Economic Affairs and approved by laboratories, tested according to the Chinese National Standard CNS 11227/A3223 Fire Door Fire Test Method, and have obtained the verification registration certificate and authorization mark issued by the Bureau of Standards, Inspection and Quarantine of the Ministry of Economic Affairs. They are called fire doors. . According to the American NFPA and IBC standards, 'fire door' is defined as 'any combination of fire door leaf, door frame, hardware and other accessories that can provide a certain degree of fire protection at the opening.



According to the Chinese national standard CNS 11227/A3223 fire door heating test results, if the fire door test body meets the following (1) to (5) conditions, it can be deemed to meet the A (heat resistance) fire door regulations , If only meet the following conditions (1) to (4), it can be deemed to meet the requirements of Class B (without heat resistance) fire doors.

1. There is no deformation, damage, falling off, peeling, etc. that are considered harmful in terms of fire protection.

2. No flames that reach the non-heated surface of the test body and cracks and holes harmful to fire prevention are not generated.

3. In the heating test, any part of the periphery (door leaf) of the test body, the reflex or deflection does not exceed one-half of the thickness of the door leaf.

4. In the heating test, no combustion flame was generated on the non-heated surface of the test body.

5. The highest non-heated surface temperature of the test body in the heating test did not exceed 260℃.



In summary, within a certain period of time, including door leaves, door sills and hardware accessories, a complete door assembly that can meet fire resistance, flame resistance and heat insulation, that is, relatively stable in the fire field, The basic properties of preventing fire smoke from penetrating and blocking the conduction of heat insulation sources can control the fire within the fire protection zone and prevent it from spreading or igniting another fire field. Only doors with such basic properties can be called 'fire doorsAll materials must be tested by laboratories designated by the Ministry of Economic Affairs.



This standard specifies the product classification, specifications and dimensions, technical requirements, test methods, inspection rules, marking and packaging, transportation and storage of wooden fire doors. This standard applies to fire doors that use wood or wood products as door frames, door leaf frames, and door leaf panels.



In addition, there are electronically controlled fire doors and ordinary fire doors:



The difference between electronically controlled fire doors and ordinary fire doors is: emergency and statistical functions, the system can automatically display the physical location of the designated cardholder on the computer, which is convenient for timely contact.

In the event of an emergency such as a fire alarm, the electronically controlled fire door will automatically open for easy escape, and the entrance and exit can also be automatically opened; when an illegal entry or exit occurs, it will automatically alarm.



The grade of fire doors can be divided into Class A fire doors, Class B fire doors, and Class C fire doors. Class A fire doors are called fully insulated fire doors, which can meet the requirements of fire insulation at the same time within the specified time. The heat resistance and fire resistance integrity requirements, and the specific fire resistance grades are respectively Class C fire doors, Class B fire doors, and Class A fire doors. Class B fire doors are called partially insulated fire doors, and their fire resistance requirements are 0.5h. Class C fire doors are called non-insulated fire doors. It has no specific requirements for fire resistance and heat insulation, as long as it meets the fire integrity within the specified time. Class A fire doors are widely used in daily use. The following is the specific introduction of Class A fire doors.



Class A fire doors in the classification of fire doors are an important part of fire protection equipment and an important step in social fire protection. The quality and use of Class A fire doors are related to the success or failure of fire protection. Class A fire doors are made of steel and wood. The fire resistance time of Class A fire doors is not less than 1.5 hours. Only when this is met can they be called Class A fire doors. Class A fire doors generally use perlite inside, and a small amount of fireproof materials such as vermiculite fire board, foam door core board, MC material, etc. are also used. The thickness of Class A fire doors is generally 50mm. Class A fire doors are generally installed in places with strict fire performance requirements.



Class B fire doors in the classification of fire doors are widely used in home fire protection. It is a key step in home fire protection. The state stipulates that the production of wooden fire doors must be dried and flame-retardant. Among them, fire doors are used The hardware fittings must also be fireproof hardware fittings. The fire resistance time of Class B fire doors is not less than 1.0 hour. The use of Class B fire doors plays a very important role in the fire prevention of our homes, so that our lives and property are well protected, and it plays an important role in home fire prevention. The missing critical step.



Class C fire doors in the classification of fire doors generally use cold-rolled steel plates and stainless steel, and are filled with environmentally friendly and healthy heat insulation materials. When a fire occurs, the Class C fire door can play a role in hindering the spread of the fire and reducing smoke activities, providing valuable time for the evacuation of personnel, and ensuring the safety of personnel. The fire resistance time of Class C fire doors is not less than 0.5 hours, and the accessories used in Class C fire doors must be fireproofed to meet the specified fire resistance limits.



CONTACT US
Just tell us your requirements, we can do more than you can imagine.
Send your inquiry

Send your inquiry

Choose a different language
English
Current language:English