Shenhai FRAGOR-Probatur
The explosion-proof classification of CT4 equipment surpasses that of BT4 equipment.
| Classis et Level | Ignitio Temperature et Group | |||||
|---|---|---|---|---|---|---|
| - | T1 | T2 | T3 | T4 | T5 | T6 |
| - | T＞450 | 450≥T＞300 | 300≥T＞200 | 200≥T＞135 | 135≥T＞100 | 100≥T＞85 |
| ego | Methane | |||||
| IIA | Ethane, Propane, Acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzene, Ammonia, Carbo carbonis monoxide, Ethyl Acetate, Acidum aceticum | Butane, Ethanol, Propylene, Butanol, Acidum aceticum, Butyl Ester, Amyl aceticum aceticum anhydride | Pentane, Hexane, Heptane, Decanus, Octane, Gasoline, Hydrogenium Sulfide, Cyclohexane, Gasoline, Kerosene, Diesel, Petroleum | Ether, Acetaldehyde, Trimethylamine | Ethyl Nitrite | |
| IIB | Propylene, Acetylene, Cyclopropane, Coke Oven Gas | Epoxy Z-Alkane, Epoxy Propane, Butadiene, Ethylene | Dimethyl Ether, Isoprene, Hydrogenium Sulfide | Diethylether, Dibutyl Ether | ||
| IIC | Aqua Gas, Hydrogenium | Acetylene | Carbon Disulfide | Ethyl Nitrate | ||
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, et 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.