Classification of the substance, mixture, which, on the basis of the physical and chemical properties of the substance, mixture, is characterised by its behaviour and hazard from a fire protection point of view. The definition mainly refers to substances stored in a room.
The former A, B, C … classes has been replaced by (1) (2) (3), which is simplified:
1. “Explosive class” include materials classified in class A or B prior to the entry of the new OTSZ*.
2. “Flammable class“ include materials classified in the fire hazard class C or D before the entry of the new .
3. “Non-flammable class“ includes materials classified in the fire hazard class E before the entry of the new OTSZ*.
(*National fire safety codes & standards in Hungary)