With the continuous development of China's social economy, the number of various types of buildings is increasing, the building height is increasing, high-rise buildings and large buildings have become the mainstream direction of urban construction. At the same time, the increase of building height and the expansion of building scale also put forward higher requirements for the fire protection performance of buildings.

Fire door refers to a door that can meet the requirements of fire stability, integrity and heat insulation in a certain period of time. It is located in the fire partition, evacuation stairwell, vertical shaft and other fire retardant dividers with certain fire resistance, fire door in addition to the role of ordinary doors, but also to prevent the spread of fire and smoke spread, can prevent the spread of fire within a certain period of time to ensure the evacuation of personnel.

The way to choose a high quality fire door

One: Check the appearance

High quality steel fire doors are solidly welded, and the solder joints are evenly distributed; The outer surface is smooth and smooth; There should be a product mark, quality inspection mark and quality certification (recognition) mark in the prescribed position. The unqualified product looks not soldered firmly, the solder joint distribution is not uniform; The spraying is uneven and smooth; There is no product mark, quality inspection mark and quality certification (recognition) mark in the specified position.

Two: On the numbers

The dimensions of qualified products shall be ≤ the dimensions in the sample description, the thickness of the door blade shall be ≥ the thickness of the door blade in the sample description, the width of the door frame side wall shall be ≥ the width of the door frame side wall in the sample description, the dimensions of the fireproof glass shall be ≤ the dimensions of the fireproof glass in the sample description, and the thickness of the fireproof glass shall be ≥ the thickness of the fireproof glass in the sample description. The dimensions of the nonconforming product should be > the dimensions in the sample description, the thickness of the door blade should be < the thickness of the door blade in the sample description, the width of the door jamb side wall should be < the width of the door jamb side wall in the sample description, the dimensions of the fireproof glass should be > the dimensions of the fireproof glass in the sample description, and the thickness of the fireproof glass should be < the thickness of the fireproof glass door in the sample description. <>

Three: Look at the seal

Qualified steel fire doors, wood fire doors should be equipped with fire seal, the seal should be straight, no arch, and have a qualified test report issued by a national testing institution; The unqualified product is not set fire seal, or the seal is not straight, arch, and there is no qualified test report issued by the national testing agency.

Choose a high quality fire door method two

1: Fire door fire rating

The fire door is divided into A, B, C three, which means the fire integrity of the fire door, that is, the fire time, the current standard in China is that the fire time is not less than 1.5 hours, Class B is not less than 1.0 hours, and Class C is not less than 0.5 hours. Grade A is generally used in more important places, such as KTV room doors, power distribution doors. Class B is used in general places such as aisles, and Class C is generally used in pipeline Wells.

2: Fire door material

Fire doors are usually divided into wooden fire doors, steel fire doors, stainless steel fire doors, fire glass doors and fire doors, whether wood, steel or other materials are divided into A, B, C three grades. The practice of our actual use is that the indoor general use of wooden fire doors and outdoor steel fire doors, one is because the indoor wood is relatively quiet when opening and closing, there will be no collision sound of steel doors, and the second is that the steel door placed outdoors can better play the role of anti-theft damage in addition to fire.

3: Fire door style and opening direction

The style mentioned here mainly refers to the door shape, single door, double door, child door, etc. In reality, we identify that the width is made into a single fire door within 1 meter, and the width of 1.2 meters can be made into a double open or child door shape. The opening of the fire door mainly refers to the single door is left or right to open, in particular, all the fire doors are open to the outside, is not allowed to open inside, the opening direction of the fire door must be against the direction of the evacuation channel.

4: Wooden fire door surface

Wood fire door factory is not like we see on the Internet is this color is that pattern, normal wood fire door factory is all the original wood color, that is, wood color. What we see on the Internet with colors are also specially made according to the needs of users, which can be painted and affixed to decorative panels.

Zhejiang Xinxiwang Security Technology Co., Ltd. is a modern enterprise integrating research and development, production and sales of middle and high-end security doors, fire doors and high-end intelligent doors. Hotline: 0579-89079900