Due to the high strength and simple fast installation metal structures are the foundation of many buildings and structures. But without additional fire protection metal bearing supports and joists of beams when heated to 500°C are deformed in 15-20 minutes, causing the risk of collapse of the building. Fire retardant paints for metal structures allows to avoid negative effects.
Plaster compounds and paints for fire protection of metal are a substitution for heat-insulating ducts and claddings which have good efficiency, but it creates an additional load and require considerable labor for installation. Fire retardant paint for metal structures increases the fire resistance limit to the standard values, practically does not weight the base, it is easily and quickly applied to elements of any shape.
The basis of coatings are flame retardant and heat-resistant components that prevent the spread of combustion and are resistant to high temperatures. During the fire, the flame retardant paint for the metal expands — the thickness of the original coating increases by a factor of tens. The process is accompanied by the release of inert gases which contribute to the removal of heat and oxygen necessary for combustion reactions. At the same time, a solid porous layer with a low thermal conductivity is formed.
Fire protection metal - paint or plaster - is designed to increase the fire resistance of the base to the standard values (from 30 to 150 minutes), which vary depending on the type of facility, such as metal construction, metal thickness and other parameters.
The same paint is able to provide different limits of fire resistance - the efficiency increases in direct proportion to the reduced thickness of the metal, as well as the number of layers applied. Manufacturers conduct tests, indicate the required thickness of the finished coating and material consumption to save consumers from complex calculations. But you can trust this information only if they have a certificate of compliance.
Fire-retardant paint is applied with a brush, roller or spray on a clean degreased substrate. In some cases the surface of the metal must be primed for anticorrosive protection and increased adhesion. The application technique involves drying the soil and each layer of the composition.
Paint HCA-LW is a certified passive fire protection of metal from the "Granit-Salamandra". The Russian company is the world leader in the development and production of aerosol fire extinguishing systems, it produces high-quality fire retardant paints.
The fire resistance of the intumescent composition HCA-LW is 45, 60 and 90 minutes, depending on the reduced thickness of the metal. All calculations are confirmed by laboratory tests.
Fire retardant paint has other advantages:
To get a durable and safe object from metal structures, you need to think in advance of the way of passive fire protection and choose a fire-resistant compound of high quality, for example, HCA-LW paint.