Spray fire retardant coating is the last construction of steel works, fire paint can be divided into thick coating and thin coating there are two, today's Soochow steel structure Xiaobian share: steel coating thick coating and thin coating type fire retardant coating construction quality standard.
1. First of all, we first understand the thick coating type fire retardant coating quality standards,
1) steel coating works with thick coating type coating should be selected according to the design, and meet the functional requirements, the product should be tested with qualified reports and product certification.
2) After the completion of the coating, the average thickness is equal to or greater than the thickness specified in the fire design, the thickness of the individual parts is lower than the specified, but must be greater than the specified 85% and the continuous area of the length of not more than 1m, and no more than 5m Similar situation.
3) All steel structure components should be completely closed, there should be no exposed and leakage coating situation.
4) coating generally does not appear cracks, if there are individual cracks, the width of not more than 1mm
5) between the coating and the steel surface and between the coating, should be bonded firmly, no hollowing, delamination and loose phenomenon.
6) coating surface should be no obvious mastoid. There are appearance requirements of the site, the bus is not straight and roundness tolerance should not be greater than 8mm.
2. Second is the quality of thin-coated fire retardant coating construction standards
L) spraying the application of paint is the choice of fire design, testing and product certification of qualified paint varieties.
2) The coating thickness is equal to or greater than the thickness specified in the fire protection design.
3) no leakage coating, Tu powder, obvious cracks and other defects. If there are individual cracks, the crack width should not be greater than 0.5mm.
4) between the coating and the steel and between the layers of coating, should be sticky solid, no delamination, hollowing and so on.
5) color and appearance in line with the design requirements, clear outline, crop formation.
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