A: Propangas er et eksempel på klasse A-miljøer.
| Klassificering af gas | Temperaturgruppe | |||||
|---|---|---|---|---|---|---|
| - | T1 | T2 | T3 | T4 | T5 | T6 |
| - | T＞450 | 450 ≥ T > 300 | 300 ≥ T > 200 | 200 ≥ T > 135 | 135 ≥ T > 100 | 100 ≥ T > 85 |
| I | Metan | |||||
| IIA | Ethan, Propan, Acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzen, Ammoniak, Carbon Monoxide, Ethyl Acetate, Acetic Acid | Butan, ethanol, propylen, butanol, eddikesyre, butylester, amylacetat eddikesyreanhydrid | Pentan, hexan, heptan, dekan, oktan, benzin, hydrogensulfid, cyclohexan, benzin, petroleum, diesel. | Ether, Acetaldehyd, Trimethylamin | Ethylnitrit | |
| IIB | Propylen, acetylen, cyklopropan, koksværksgas | Epoxy Z-Alkane, Epoxy Propan, Butadien, Ethylen | Dimethylether, isopren, hydrogensulfid | Diethylether, Dibutyl Ether | ||
| IIC | Vand, gas, brint | Acetylen | Kulstofdisulfid | Ethylnitrat | ||
T4: T'et står for temperatur og er inddelt i seks niveauer. T4 angiver, at udstyrets maksimale overfladetemperatur ikke må overstige 135 °C.
