What is Class A Fire What is Class B Fireproof?
Now the state must use A-class fire B-class can not be used
Jiuxin building materials "HIP ultra-thin vacuum fire insulation board" A-class fire, low thermal conductivity, CCTV 10 special report.
B is a combustible material; B2 is a combustible material; B3 is a combustible material; B1 is a combustible material; B2 is a combustible material; B3 is a combustible material. This is divided by the oxygen index. For example, see the "interior decoration design fire safety norms."
Class A, B level in two different standards, please do not confuse. A-level assessment criteria for the GB8624-1997, and B-level GB8624-2006. GB8624-1997 medium-level mainly: A-class, B1 level, B2 level, the current standard has been void, replaced by GB8624-2006. In the GB8624-2006, the general material classification: A1 grade, A2 grade Chuanchuan devaluation collision turtle sandstorm, B, C, D, E, F, floor material: A1fl level, A2fl AC, insulation, insulation material: A1L level, A2L level, BL level, CL grade, DL level, EL level, FL level, the above level are from high to low level, Bfl level, Cfl level, Dfl level, Efl level, Ffl level arrangement. GB8624-1997 A level can correspond to GB8624-2006 in the A1 and A2 level. The difference between the old and the new standard is that the A-level is only tested for incombustibility, while the A1 level detects the incombustibility and total combustion calorific value, the A2-level test incombustibility, the SBI monomer combustion test (or the total combustion calorific value, the SBI monomer combustion test , One of the two). While the B-level test items for the SBI monomer combustion test, flammability and so on. Details if you need, please leave the mailbox, I sent you.
