The explosion-proof rating for Zone A is lower than that for Zone B; however, the temperature class T6 exceeds T4. Consequently, it is not appropriate to claim that one has a higher explosion-proof level than the other.
| Gas-Klassifizierung | Temperatur-Gruppe | |||||
|---|---|---|---|---|---|---|
| - | T1 | T2 | T3 | T4 | T5 | T6 |
| - | T＞450 | 450 ≥ T > 300 | 300 ≥ T > 200 | 200 ≥ T > 135 | 135 ≥ T > 100 | 100 ≥ T > 85 |
| I | Methan | |||||
| IIA | Ethan, Propan, Aceton, Phenethyl, Ene, Aminobenzol, Toluol, Benzol, Ammoniak, Kohlenmonoxid, Ethylacetat, Essigsäure | Butan, Ethanol, Propylen, Butanol, Essigsäure, Butylester, Amylacetat, Essigsäureanhydrid | Pentan, Hexan, Heptan, Decan, Oktan, Benzin, Schwefelwasserstoff, Cyclohexan, Benzin, Kerosin, Diesel, Erdöl | Ether, Acetaldehyd, Trimethylamin | Ethylnitrit | |
| IIB | Propylen, Acetylen, Cyclopropan, Koksofengas | Epoxy-Z-Alkan, Epoxy-Propan, Butadien, Ethylen | Dimethylether, Isopren, Schwefelwasserstoff | Diethylether, Dibutylether | ||
| IIC | Wassergas, Wasserstoff | Acetylen | Schwefelkohlenstoff | Ethylnitrat | ||
It is more accurate to state that each is tailored to suit distinct flammable and explosive environments.
