The explosion-proof classification of CT4 equipment surpasses that of BT4 equipment.
| 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 | ||
BT4 is classified as a Class B temperature group, where the maximum surface temperature of T4-rated devices does not exceed 135°C. CT4 holds a Class C explosion-proof rating, comparable to BT4, and is suitable for environments with hazardous gases such as hydrogen and acetylene, maintaining a maximum surface temperature of 135°C.
Scope of Use
BT4 is suitable for common gases including methane, ethane, petroleum, and hydrogen sulfide.
CT4 encompasses a broader range of less common explosive gases, such as hydrogen and water gas at the CT1 level, acetylene at the CT2 level, and carbon disulfide at the CT4 level.
