What is the application specification of fire retardant coatings for steel structures?

Whether the fireproof coating can be passed is very simple to spend some money on the relationship between fire protection and everything.

The national standard for the inspection of fire retardant coatings for steel structures is GB14907-2018.

This standard stipulates the terms and definitions, classification and model, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of fire retardant coatings for steel structures.

This standard is applicable to all kinds of steel structure fireproof coatings used on the surface of building (structure) steel structure.

As a building material, steel structure fire retardant coating has a wide range of applications. So what are the construction specifications for the construction of steel structure fire retardant coatings? And what are its application characteristics?

Now let's take a look at the introduction of the construction specifications and application characteristics of steel structure fireproof coatings.

Code for the construction of fire retardant coatings for steel structures.

1. The steel structure fireproof coating project should be constructed by the construction unit or production unit with corresponding qualifications. All kinds of steel structure fireproof coating products entering the construction site should have the type approval certificate, type inspection report, product certificate, product manual, construction technology and other technical information provided by the manufacturer.

2. Before construction, the surface of the steel structure should be rusted, and the anti-rust treatment should be determined according to the use requirements. Rust removal and anti-rust treatment should comply with the current national regulations.

3. The dust and oil stains on the surface of the steel structure should be cleaned, and the joints and gaps at the joints should be plugged and flattened with fireproof coatings or other fireproof materials before construction. Fireproof coatings should be applied before interior decoration and under the condition that they are not damaged by subsequent works.

The coating during the curing period should be protected from rain, water washing, dirt pollution and bumps. 4. The ambient temperature and relative humidity of the construction of the steel structure fireproof coating should meet the requirements of the coating product manual. If there is no requirement, the ambient temperature should be maintained at 5 to 38 during the construction of water-based coatings and before the coating is dried and cured, and the ambient temperature should be kept at -5 to 38 for solvent-based coatings.

The relative humidity should not be greater than 90%, and the air should be circulated. When the temperature is too low, the wind speed is greater than 5m s, the rain is rainy, or there is condensation on the surface of the component, it is not suitable for operation.

5. Before the construction of the coating, a specific and feasible construction organization design plan should be proposed according to the structure and site conditions of the project, and the construction should be carried out according to the provisions of the quality manual, program file, work instruction of the construction unit and the coating construction technology of the manufacturer. When measuring the coating thickness of components with a thickness gauge, the measurement points should be evenly arranged, and the number of measurement points per linear meter of linear components such as steel beams and steel columns should not be less than two points; The number of measurement points per square meter of surface-shaped components such as steel plates should not be less than five points.

During construction, the entire process, including the concealed engineering parts, must be recorded in detail. Application characteristics of anti-fire coatings for steel structures.

NCB ultra-thin steel structure fireproof coating is used for fireproof protection of indoor exposed steel structures such as airports, power plants, petrochemicals, stadiums, commercial plazas, industrial factories and mines, and high-rise buildings.

The steel structure fireproof coating usually loses its bearing capacity at a temperature of 450 650, and a large deformation occurs, resulting in the bending of steel columns and steel beams, and the result is that it can not continue to be used due to excessive deformation, and the fire resistance limit of the steel structure without protection is generally about 15 minutes. The length of this time is also related to the rate at which the component absorbs heat.

The above is what I introduced to you about the construction specifications and application characteristics of steel structure fireproof coatings, I hope it will be helpful to you when doing building decoration. The fire retardant coating for steel structure is composed of matrix resin, catalyst, carbon-forming agent and foaming agent. If you need to know more about it, you can ****.

The requirements of steel structure fireproof coatings, the materials meet the technical indicators of GB14907 "steel structure fireproof coatings".

The construction can meet the relevant construction acceptance specifications.