Fire doors are particularly important as the first level of home fire protection, but when you buy a low-quality fire door, the fire door no longer fires, what should you do? The fire departments of various cities investigated and dealt with and destroyed a batch of honeycomb paper instead of fire-proof filling Inferior fire doors of materials, here firefighters introduced a few tricks to buy high-quality fire doors. According to the regulations, steel and wooden fire doors can be divided into three categories: Class A, B, and C according to the fire resistance limit. The fire resistance requirements are 90 minutes, 60 minutes, and 30 minutes, respectively. For drying and flame retardant treatment, the hardware used in it must also be fireproof hardware.
There are three major ways to purchase high-quality fire doors. The first is to check the appearance. The high-quality steel fire doors are firmly welded and the welding points are evenly distributed. The outer surface is sprayed flat and smooth. The appearance of a qualified wooden fire door should be complete, no damage, no surface gloss, no planing marks, burrs, and hammer marks; cut corners and seams should be strict and flat; product marks, quality inspection qualification marks and quality should be provided at the specified locations. Certification (recognition) mark of conformity.
The second measure is the number. The overall dimensions of the qualified product should be less than or equal to the dimensions in the sample description. The thickness of the door leaf should be greater than or equal to the thickness of the door leaf in the sample description. The overall dimensions of the fire-resistant glass shall be less than or equal to the outer dimensions of the fire-resistant glass as described in the sample description, and the thickness of the fire-resistant glass shall be greater than or equal to the thickness of the fire-resistant glass as described in the sample description.
The third measure is to look at the seal. Qualified steel and wooden fire doors should be provided with fire seals. The seals should be straight, without arches, and have a qualified test report issued by the testing agency.