Rock wool insulation board is a lot of buildings and factories will use thermal insulation building materials, and now the building fire safety standards are getting higher and higher, in the decoration, will consider the fire resistance limit of building materials, so rock wool insulation board fire resistance?  What is the fire resistance limit for?

　　Rock wool insulation board fire rating

　　Rock wool insulation board fire rating general rock wool insulation board fire rating A and A1, is almost no burning material.  As the preferred building material for exterior walls, rock wool insulation board will not release toxic smoke, so when a fire can effectively intercept the spread of flame, fire performance is very good, and has thermal insulation effect, it can often be seen in the building materials of exterior walls.

　　In addition to grade A and A1, the fire rating of building materials also includes grade B3 flammability, grade B2 flammability and grade B1 flammability.  The B3 class is easy to burn, no flame retardant effect, high fire risk;  B2 class combustible material has a certain flame retardant effect.  In the case of open fire or high temperature, will catch fire, easy to cause fire, such as wood;  B1 class refractory material has high flame retardant performance.  In case of open fire or high temperature, it is difficult to ignite, and the fire will not spread quickly after burning. When the fire source is removed, the burning will stop.

　　Rock wool insulation board fire resistance limit for how many hours?

　　Rock wool insulation board fire resistance limit for how many hours?  As building materials, rock wool insulation board has fire resistance limit.  Fire resistance limit is the time, usually measured in hours, required for a building component, fitting or structure to lose its carrying capacity, integrity or heat insulation under standard fire test conditions.

　　In general, the bulk density of rock wool insulation board will be different according to the density, but also affect the flame retardant value of rock wool insulation board.  In addition, the thickness of rock wool insulation board will also affect its fire resistance limit.  The same thickness of rock wool insulation board, according to the density, bulk density and other factors, the fire resistance range is about 1.5-3 hours, some better fire resistance rock wool insulation board fire performance is excellent, the use of fire A1 class non-combustible standard Of The Uetersen rock wool insulation board, the fire resistance limit can even reach 5 hours.