Steel fire door with light weight, high strength, large scope, large space, strong earthquake resistance other characteristics, widely used in the modern construction industry, although steel fire door is non-combustible material, but still deformation in high temperature fire. How to prevent steel fire doors being deformed by heat? I will ask the staff of qinghai fire door manufacturer to find it.
1. Outsourcing layer. The outer layer of the steel structure can be cast sprayed on site. The outer layer of cast-in-place solid concrete is usually made of wire mesh steel reinforcement to increase strength prevent cracking. Spray method Lime cement gypsum mortar can be applied on the surface of steel structure mixed with perlite asbestos. Also, the shell can be made perlite, asbestos, gypsum asbestos-cement, light concrete prefabricated panels, which are fixed to the steel structure by adhesives, nails, bolts, etc.
2. Water filling. Hollow steel structures can be filled with water to prevent fire effectively. Through the circulation of water in the steel structure, the heat generated can be absorbed to keep the steel structure at low temperature, the cooled hot water can be recycled.
3. The shielding. The steel structure is provided in the wall ceiling composed of refractory materials. The steel fire doors can be fireproof by adding a small amount of refractory materials even no refractory materials.
4. Fireproof paint. Steel structure flame retardant coating has good fire prevention, heat insulation performance, construction is limited by the geometric shape of steel structure, generally do need to add auxiliary facilities, the quality of the paint is light, has a certain aesthetic decorative effect. In contrast, direct spraying refractory coating on steel components is particularly practical, simple convenient;