Fire doors are used in many large shopping malls or office buildings to avoid fires and spread the fire. Among them, Class A fire doors are more common. What is the national standard for Class A fire doors ? Today, let's take a look at the national standards for Class A fire doors by introducing the following related content!

National Standard for Class A Fire Door

Class A fire doors should have good thermal insulation in the national standard, and should be very prominent in blocking sound and fire. The longest fire resistance is not less than one and a half hours. In addition, the integrity and heat insulation time of the fire door is not less than 1.20h, that is, the flame retardant time is not less than 1.2 hours. In addition, according to national standards, the materials of Grade A fire doors are mainly wood, steel, and steel wood. The fillers in fire doors are mostly perlite. The thickness of the doors is generally 0.5 cm.

Class A fire door performance characteristics

The appearance of Class A fire door not only looks very smooth and has good decorative effect, but also the fire door is very flexible in opening and closing. In terms of service life, due to the high hardness of the material, it is very durable and extremely safe to use. Class A fire doors have large size options, in addition to the relevant door opening standards issued by the state, special customized services can also be provided according to consumer needs. Fire doors are divided into functional sizes according to grades. Among them, Class A and Class A fire doors have the best flame retardant effect, last for a long time, and are frequently used in places with large crowds. Of course, it is also used in spaces with high fire resistance requirements, such as in closed rooms such as machine rooms and oil depots.

How to choose a Class A fire door

1. Look at the seal

When buying a Class A fire door, you first need to see whether there is a fire seal attached to it, in addition to whether the seal is horizontal and vertical, whether there is an arching problem, and whether you have the relevant national product testing certificate.

2. For numbers

The appearance size of a high-quality Class A fire door should be smaller than the size described in the sample displayed in the exhibition hall, but the actual door leaf size should be larger than the sample. However, the width of Class A fire door frame should be larger than the width of the sample. If glass is installed, the size should not exceed the size of the sample glass. In terms of thickness, it needs to be higher than the sample.

3. Check the appearance

In the production process of high-quality Class A fire doors, the welding is firm, the appearance spraying effect is very good, and it looks very smooth. If it is a wooden material, the appearance should be perfect, without any defects, no bubbles and scratches. Work on the joints of fire doors should be tight and smooth.

Regarding the national standard of Class A fire door , I will introduce it temporarily here, I hope to help you. In our daily purchase process, not only do we need to compare brands, but we must also understand the characteristics of our products. If you want to know more about decoration, you can pay attention to the information on this website, more exciting content is waiting for you.

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