Plate fire rating, such as glass magnesium board incombustibility to A1 level, how to distinguish these, how many fire rating?
If it is a real glass magnesium board can reach a level, because he can use the material to make him a level
Class B, Flammability, B1, Flammability; B2, Flammability; B3, Flammability, To understand these grades, you can call Dachuan duct manufacturers advice, they have 10 years of history, Specializing in the production of glass magnesium ventilation ducts and fire ducts, etc., in line with national standards in the quality of China's fire building materials network can be found.
Classification of fireproof sheet
A1 is absolutely nonflammable, without any toxic fumes
A2 is not combustible, there is a certain amount of toxic flue gas production (in line with testing standards)
B1 flame retardant
B2 does not burn
B3 flammable
Now on the market a small number of A-class fire board, most of them are B-class, we must see this plate of the test report and is the type
