3 hours non expansive Fire retardant coating Manufacturer's steel structure fire resistance grade I
3-hour non expansion fire protection coating Wholesale quotation of manufacturer, steel structure fire resistance grade I fire resistance performance Steel column 3.0h fire retardant coating and 3-hour non expansive fire retardant coating were inspected by the National Building Fire Performance Inspection Center, and the implementation standard is GB14907-2018, Non expansive fireproof coating , The main component is inorganic thermal insulation material , Granular surface , Low density , The coating will not expand when heated , Because of its good thermal insulation , Therefore, it is also called thermal insulation fireproof coating. Its fire prevention mechanism is to use the inherent good thermal insulation of the coating , Prevent fire heat from transferring to steel , And form a dense glaze under high temperature , It can effectively isolate oxygen and reflect heat , Delay the temperature rise of steel structure , It plays the role of fire protection.
Base treatment method
Of the protected steel substrate surface treatment It is the basic process of thin steel structure water-based fire retardant coating construction. The purpose is to create a good condition for the adhesion of the coating film to the surface of the protected steel substrate, and at the same time, improve and improve the performance of the coating film
Steel structure surface treatment is a key to achieve good results in the whole painting process key Link.
The purpose of surface treatment is to remove all kinds of dirt on the surface of the coated object so that the coating can be well attached to the surface of the coated steel substrate to ensure that the coating has excellent performance.
There are two types of dirt: inorganic dirt, which not only affects the appearance of the coating, but also can make the film flake off seriously,
Second, the surface of the protected object shall be trimmed to remove the existing defects, and the surface roughness required for the construction of fire retardant coating shall be provided, so that there is a good adhesion foundation when painting.
Practice shows that the proper roughness of the surface of the coated object is forty-six 。
Construction requirements for steel structure fireproof coating
2.1 General provisions
2.1.1 The steel structure fireproof coating project shall be constructed by the construction unit or production unit with corresponding qualification.
2.1.2 Various steel structure fireproof coating products entering the construction site shall be provided with technical data such as type approval certificate, type inspection report, product certificate, product specification and construction process provided by the manufacturer.
2.1.3 Before construction, the steel structure surface shall be derusted, and rust prevention treatment shall be determined according to the use requirements. Rust removal and rust prevention treatment shall comply with the current relevant regulations.
2.1.4 The dust and oil stain on the surface of the steel structure shall be removed, and the joints at its joints shall be filled with fireproof paint or other fireproof materials before construction.
2.1.5 The fireproof coating should be constructed before interior decoration and under the condition that it will not be damaged by subsequent works. During the curing period, the coating shall be protected from rain, water, dirt pollution and bump.
2.1.6 The ambient temperature and relative humidity of steel structure fireproof coating construction shall meet the requirements of the coating product specification. If there is no requirement, the ambient temperature should be kept between 5 and 38 ℃ during the construction of water-based coatings and before the drying and curing of coatings, and between - 5 and 38 ℃ for solvent based coatings. The relative humidity should not be greater than 90%, and the air should be well ventilated. When the temperature is too low, the wind speed is greater than 5m/s, or there is dew condensation on the component surface in rainy days, the operation is not suitable.
2.1.7 Before coating construction, specific and feasible construction design scheme shall be proposed according to the project structure and site conditions, and construction shall be carried out according to the provisions of the quality manual, procedure documents, operation instructions of the construction unit and the coating construction process of the manufacturer.
2.1.8 When measuring the coating thickness of components with a thickness gauge, the measuring points shall be evenly arranged, and the number of measuring points per linear meter of linear components such as steel beams and steel columns shall not be less than two; The number of measuring points per square meter of opposite components such as steel plates shall not be less than five.
2.1.9 During the construction, the whole process, including the situation of concealed works, must be recorded in detail.
