23 Year Industrial Explosion-Proof Manufacturer

How to Classify Explosion-Proof Levels

Explosive gas environments are categorized into three levels—A, B, and C—based on the maximum experimental safe gap or the minimum ignition current required.

Class And LevelIgnition Temperature And Group
-T1T2T3T4T5T6
-T>450450≥T>300300≥T>200200≥T>135135≥T>100100≥T>85
IMethane
IIAEthane, Propane, Acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzene, Ammonia, Carbon Monoxide, Ethyl Acetate, Acetic AcidButane, Ethanol, Propylene, Butanol, Acetic Acid, Butyl Ester, Amyl Acetate Acetic AnhydridePentane, Hexane, Heptane, Decane, Octane, Gasoline, Hydrogen Sulfide, Cyclohexane, Gasoline, Kerosene, Diesel, PetroleumEther, Acetaldehyde, TrimethylamineEthyl Nitrite
IIBPropylene, Acetylene, Cyclopropane, Coke Oven GasEpoxy Z-Alkane, Epoxy Propane, Butadiene, EthyleneDimethyl Ether, Isoprene, Hydrogen SulfideDiethylether, Dibutyl Ether
IICWater Gas, HydrogenAcetyleneCarbon DisulfideEthyl Nitrate

Devices are organized into six temperature classifications, ranging from T1 to T6, determined by the maximum allowable surface temperature.

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