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The explosion-proof classification of CT4 equipment surpasses that of BT4 equipment.
| Classe è Livellu | Ignition Temperature è Gruppu | |||||
|---|---|---|---|---|---|---|
| - | T1 | T2 | T3 | T4 | T5 | T6 |
| - | T＞450 | 450≥T＞300 | 300≥T＞200 | 200≥T＞135 | 135≥T＞100 | 100≥T＞85 |
| I | Metanu | |||||
| IIA | Ethane, Propanu, Acetone, Fenetil, Ene, Aminobenzene, Toluene, Benzene, Ammonia, Monòssidu di carbone, Acetate d'etile, Acitu Acìticu | Butane, Etanolu, Propilene, Butanol, Acitu Acìticu, Butyl Ester, Amyl Acetate Acetic Anhydride | Pentane, Hexane, Heptane, Decane, Octane, A benzina, Idrogenu sulfuru, Cicloesanu, A benzina, Kerosene, Diesel, Petrolium | Etere, Acetaldeide, trimetilammina | Nitritu d'etile | |
| IIB | Propilene, Acetilene, Ciclopropanu, Gas di Coca Cola | Epoxy Z-Alkane, Epoxy Propane, Butadiene, Etilene | Etere dimetilicu, Isoprene, Idrogenu sulfuru | Etere dietile, Etere dibutil | ||
| IIC | Gas d'acqua, Idrogenu | Acetilene | Disulfuru di carbone | Nitratu di etile | ||
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, pitroliu, è l'idrogenu sulfide.
CT4 encompasses a broader range of less common splusivi gasi, such as hydrogen and water gas at the CT1 level, acetylene at the CT2 level, and carbon disulfide at the CT4 level.