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What is the Main Fire Protection Principle of Steel Structure Fire Retardant?
Fireproof coatings for steel structures are used to contain the raging flames and protect the steel from suddenly losing its load-bearing power. Covering steel is inherently strong, but when it encounters a hot topic, it is soft. When the temperature reaches 500 degrees, it will buckle and collapse. There is no guarantee. As soon as the fire arrives, it will be very harmful. All buildings, factories, and those who rely on their support are in danger. It is based on ancient and modern craftsmen who think hard and make fireproof agents in order to delay heat transfer and protect steel bones.
Fireproof coatings for steel structures have two reasons. First, the paint expands and foams when heated, making the honeycomb porous and blocking flame heat. This bubble-like layer is large, with numerous micropores, and it is especially difficult for heat to pass through. The flame burns the steel body, and the bubble layer is first exposed. The heat conduction inside and outside is very different, and the heat is sluggish, so that the steel bone is temporarily safe. Second, the coating is inherently resistant to high temperature, and has the characteristics of refractory combustion and heat dissipation. It is oxidized, dehydrated and even decomposed, seizing the energy of fire, and consuming heat to protect itself. Even if the flame burns, it can be unloaded over time. If the thickness is appropriate, it can provide an opportunity for steel parts to escape, and the structure has ample room for rescue.
However, fireproof coatings have different materials. Either organic or inorganic, the quality is different and the effect is also different. Organic ones contain mostly expanded materials, which interact with fire and expand rapidly to generate foam heat resistance; inorganic ones have solid heat insulation, although there is no expansion, their heat transfer is more durable. The combination of various materials is gradually improved, resulting in double the safety of steel structures. However, the thickness of the coating and the uniform rank of the coating are also the key points of fire protection. If the operation is improper, its work will be wasted.
The principle of fire prevention is to prevent fire by blocking fire and building a shell outside the surface, so that the heat cannot suddenly reach the steel body. Even if the building is in danger, relying on this thin layer of several inches is the important defense of modern engineering. Prepare this wonderful agent, steel bones like armor, although the fire is blazing, you have to deal with it calmly. Protecting people's lives and preserving property is actually the key to maintaining the stability of your family and country. Such a fire prevention principle is still in this world, and it is not easy for thousands of years.
What is the Temperature Range of Steel Structure Fire Retardant?
Fireproof coatings for steel structures are one of the barriers to delay the spread of fire and protect steel structures. They have a wide range of uses, and their applicable temperature range is also very important. Looking at the steel structure fireproof coatings in use today, they are generally divided according to their performance and grade, and cover thick coating type, thin coating type, and ultra-thin type. However, its temperature resistance is extremely high, which is related to the formulation and design of the coating, and is generally used between 100 degrees and 600 degrees Celsius. Temperatures below normal temperature will not deteriorate the fireproof coating. High temperatures can reach five or six hundred degrees, and the coating can still hinder heat transfer and preserve the internal force of steel parts. In case of flames, the temperature rises to around 600 degrees, and the steel is at risk of losing its structural strength. Fireproof coatings can maintain their carrying capacity at critical moments.
When a steel structure encounters fire, the temperature rises sharply. If there is no protection, the fire resistance of the steel will drop sharply, and the steel will lose part of its bearing capacity at 150 degrees Celsius, which will become more dangerous when it reaches more than 300 or 400 degrees. Today's fireproof coatings are specially designed to resist interference based on the principle of thermal expansion or heat insulation. Taking the expansion type as an example, the coating expands when heated, forming a thick foam-like carbon layer, which is difficult to penetrate by heat, and the temperature rise of the inner steel is slow. Its applicable temperature is mostly between minus 20 and plus 600 degrees Celsius. As for the non-expansion type or the composite type, the temperature range is also slightly different, but generally not from the above range. Each has a ratio, which is suitable for the needs of different industrial and civil buildings.
However, the efficiency of the coating depends on the thickness, uniformity, adhesion and supporting environment of the construction. If it is not properly operated, although it is applied to the steel watch, the temperature resistance is not enough. It is advisable to follow the specifications, choose regular products, and identify their inspection qualified reports. Looking at today's steel structure fireproof coatings, the applicable temperature range is usually between minus 20 and 600 degrees Celsius. In case of special projects, it can be adjusted according to needs, but it must follow the technical specifications and do not change it. In this way, the steel structure must be kept safe and the building is also completely solid.
What are the Construction Methods of Steel Structure Fire Retardant?
Fire prevention is the most important thing for building on behalf of others. Construction methods are often the same, and they can be used in a good way. Here is a brief description of the method. Let's test it.
First of all, the method of fire prevention is commonly used. Fireproof materials are well-prepared, and they are all suitable for the surface. The thickness depends on the requirements. This method is convenient to apply, the efficiency is high, and the surface should be large. Only when the surface is dry and solid, and the surface is added, it will be effective. In case of poor or damp on the construction site, it will be slightly stifled.
Secondly, the brush method is also advisable. Dip the material with a brush, and apply it to the material, which needs to be added repeatedly to make it dense. This method is thoughtful, and it is suitable for the parts, or the edges and corners of the pieces. However, the process is complicated, requires a lot of manpower, and consumes a lot of money.
There is also a wrapping method, which is made of gypsum board, refractory board or pearl board, cut and closed, wrapped on the board, and sealed with bolts. This method is reliable in fire protection, effective, and occupies a lot of space, and the material and safety are especially careful.
Near those still have the use of self-cleaning machinery, which can save manpower, increase uniformity, but it is not inexpensive to install, and it is not easy to operate.
The cost of each method depends on the discretion. Generally, the construction is more used or brushed; high-quality and large-scale, important applications, or need to be legal to achieve perfection. All methods used require a clear surface of the material to ensure a firm adhesion and flame retardant performance. In this way, it can be safe from fires for a long time and ensure the safety of construction personnel.
How is the Environmental Performance of Steel Structure Fire Retardant?
Fireproof coatings for steel structures are also relied on by ancient and modern buildings. Its environmental protection performance is actually the gist of contemporary craftsmanship. The reasons for this are described below.
Fireproof coatings for steel structures are mostly made of inorganic and organic composites, and do not contain harmful solvents or heavy metals, so they do not cause major ecological pollution. Its production method is excellent, and the feeding material is exquisite. It often selects ingredients that are non-toxic and harmless to the human body and the environment. When used, the smell is light, and it is not easy to cause volatile organic pollution. After it hardens, the layer is dense and stable like a rock. It is not easy to analyze harmful substances during wind and rain erosion, and keeps the place of work and life clean and safe.
During the preparation process, the manufacturer uses more recycling methods, uses less energy-consuming equipment, and saves energy and reduces emissions. Products put on the market have mostly obtained environmental protection certifications or obtained green building materials labels, which proves that their production and use are appropriate. If the residues after use are properly recycled and disposed of in a standardized manner, they will not bring hidden dangers to soil and water bodies. Some coatings are more degradable and recyclable, showing the principle of ecological cycle.
In addition to fire prevention, they are more weather-resistant and anti-corrosion, do not need repeated maintenance, and save resources. Compared with traditional oil-based coatings, they reduce harmful gas emissions and reduce the burden on the atmosphere. Since the promotion, the practice of green building concepts has contributed to the improvement of engineering quality and livability.
In summary, steel structure fire retardant coatings have excellent environmental protection performance, not only maintaining building safety, but also conforming to green development. Whether it is production, use or disposal, they are all environmentally friendly and are an indispensable material for modern architecture. If applied according to local conditions and regulations, it can turn harm into benefit, benefit everyone, and protect me and clean the world.
What are the Certification Standards for Steel Structure Fire Retardants?
Fireproof coatings for steel structures are the essence of modern building fire protection, and there are many regulations for their certification standards. Among them, the most famous ones are the Chinese national standards "Technical Specifications for the Application of Fireproof Coatings for Steel Structures" (GB14907), "Fireproof Coatings for Steel Structures for Buildings" (GB/T9978), as well as European standards EN13381, American standards such as ASTM E119, etc. All steel structure fireproof coatings should be inspected by the above standards before they can be applied to large public facilities and industrial plants.
Test content, the first fire resistance limit. According to its standards, the steel structure needs to be coated under high temperature, and the special furnace body should be coordinated to simulate the actual fire situation. Only those whose structures can maintain the bearing capacity within the specified time limit can be judged as qualified. Second, the coating thickness, bonding strength, anti-peeling, etc., all have clear limits to ensure that the coating is not easy to fall off during fires and can continue to withstand high temperatures.
The material composition limit is also important for review. Fireproof coatings are mostly inorganic, expansive or composite materials, which need to be non-toxic and harmless gas escape to protect the health of the human body and the environment. In the test method, custom samples are often used, and flames are placed to bake or exposed to high temperature to test their physical and chemical properties. Whether they pass or not is recorded in the test report, notified to the relevant competent authority, and the certificate can only be issued after review.
The European EN13381 standard formulates various types of coatings fire performance evaluation methods for different structural types, so that the standards tend to be scientific and complete. Another example is ASTM E119 in the United States, which focuses on the testing of components in the overall system state to ensure high reliability in practical applications. Although countries have similarities and differences, the general purpose is to keep structural protection and life assurance as the norm.
To sum up, the certification of fireproof coatings for steel structures is complicated and rigorous. Those who apply it to important places must rely on the national standard, European standard, and American standard, and go through several steps of testing, review, and certification before they can be justifiably applied to buildings. Therefore, from this perspective, fire protection is the cornerstone of the structure, and it cannot be ignored.