Extruded board fire B1, B2 grade material how to distinguish
Extrusion board fire B1, B2 grade material distinction: B2 level for the slow combustion level, that is, after the fire will not become larger, and the drop will not ignite the filter paper; B1 level from the asphyxia, that is, leave the fire After the automatic extinguished, or 10 seconds off. Extruded board is extruded polystyrene insulation board, it is polystyrene resin as raw materials with other raw materials and additives, through a special process of heating at the same time into the catalyst, and then continuous extrusion (XPS), XPS has a perfect closed-cell honeycomb structure, this structure allows the XPS board has a very low water absorption. It is known as the thermal insulation with extruded polystyrene foam (XPS) (Almost no water absorption), moisture-proof, airtight, light, corrosion resistance, low thermal conductivity, high pressure resistance, anti-aging (normal use almost no aging decomposition), long life, low thermal conductivity Energy saving and environmental protection insulation materials. Due to the continuous extrusion caused by the tight closed-cell structure. Its density, water absorption, thermal conductivity and steam permeability are lower than other types of sheet metal, is the market recognized the best insulation materials. Extruded board of fire grade classification is more detailed, there are B3, B2, B1 three levels (A level on the current science and technology can not be achieved), which B3 level for the ordinary board, that is, the fire, and the fire is growing ; B2 level for the slow combustion level, that is, after the point of fire will not become larger, and the drop will not ignite the filter paper; B1 level from the asphyxiation level, that is, after leaving the fire automatically extinguished, or 10 seconds off.
Fire level and density does not matter, with the lighter point can not fully explain the problem, b1 level to compound gb8624b1 level
Distinguish its dry density, and burn performance, the most direct way is to burn with a lighter!
