Non-expansive fire retardant coating is a solid barrier to protect the safety of steel structures
Publish Time: 2025-04-24
In today's construction field, steel structures are widely used because of their high strength, light weight, and good earthquake resistance. However, although steel is a non-combustible material, it is very easy to conduct heat. At high temperatures, its strength will drop sharply, causing the structure to collapse. Therefore, it is crucial to effectively protect steel structures from fire. Non-expansive fire retardant coating, as a thick-coated fire retardant coating designed and produced by our company, was born for this purpose, providing reliable fireproof and heat-insulating protection for load-bearing components of steel structures.1. Core features of non-expansive fire retardant coatingNon-expansiveness: Unlike traditional intumescent fire retardant coatings that expand at high temperatures to form a carbonized foam layer, non-expansive fire retardant coatings basically do not change in volume when exposed to fire. This feature allows the coating to remain stable in a fire, and will not crack or fall off due to expansion, thereby ensuring the durability of the fireproof and heat-insulating effect.Excellent fireproof and heat-insulating performance: After the coating is sprayed on the surface of the steel structure, it forms a fireproof and heat-insulating protective layer by relying on the non-flammability and low thermal conductivity of the coating itself. This protective layer can effectively block the transfer of fire heat to the steel structure substrate, slow down the temperature rise rate of the steel, and thus significantly improve the fire resistance limit of the steel structure.Good material compatibility: non-expansive fire retardant coating has the characteristics of not corroding steel and not chemically reacting with any anti-corrosion primer. This means that during the coating process, there is no need to worry about the compatibility between the coating and the steel or anti-corrosion primer, ensuring the integrity and stability of the coating.Environmentally friendly and safe: The coating has no irritating odor, does not smoke or release harmful gases when exposed to fire. This not only protects the health of construction workers, but also reduces the pollution to the environment in fires, which meets the high requirements of modern buildings for environmental protection and safety.Light and efficient coating: The coating weight of non-expansive fire retardant coating is light, and the structural load weight is relatively light. This feature enables the coating to provide effective fire protection without affecting the overall bearing capacity of the steel structure. At the same time, the unit coating area is large, which reduces the construction time and cost.2. Application scenarios of non-expansive fire retardant coatingNon-expansive fire retardant coating is mainly used for fire protection of steel structure load-bearing components with fire resistance levels of Class II, Class I and required by the specification. In high-rise buildings, large factories, bridges and other steel structures, this coating can play an important role to ensure the safety and stability of steel structures in fire.3. Construction points of non-expansive fire retardant coatingSurface treatment: Before construction, the surface of the steel structure needs to be thoroughly cleaned and rust-free to ensure good adhesion between the coating and the steel.Coating process: Spraying or smearing is used for coating to ensure that the coating is uniform and dense. The coating thickness should be controlled according to the design requirements to achieve the expected fireproof and heat-insulating effect.Maintenance and inspection: After the construction is completed, the coating needs to be maintained to ensure that it is fully dried and cured. At the same time, the coating should be inspected and maintained regularly to promptly detect and deal with possible damage or aging problems of the coating.Non-expansive fire retardant coating plays an important role in the field of steel structure fire protection with its unique performance and wide application scenarios. With the continuous development of the construction industry and the increasing requirements for safety and environmental protection, non-expansive fire retardant coating will usher in a broader development prospect.
