Mazingira ya gesi inayolipuka yamegawanywa katika viwango vitatu—A, B, na C—kulingana na pengo la juu zaidi la usalama la majaribio au kiwango cha chini cha sasa cha kuwasha kinachohitajika.
Darasa na Kiwango | Joto la Kuwasha na Kikundi | |||||
---|---|---|---|---|---|---|
- | T1 | T2 | T3 | T4 | T5 | T6 |
- | T~450 | 450≥T>300 | 300≥T>200 | 200≥T>135 | 135≥T>100 | 100≥T>85 |
I | Methane | |||||
IIA | Ethane, Propane, Asetoni, Phenethyl, Ene, Aminobenzene, Toluini, Benzene, Amonia, Monoxide ya kaboni, Acetate ya Ethyl, Asidi ya Acetiki | Butane, Ethanoli, Propylene, Butanol, Asidi ya Acetiki, Butyl Ester, Amyl Acetate Asetiki anhidridi | Pentane, Hexane, Heptane, Decane, Octane, Petroli, Sulfidi ya hidrojeni, Cyclohexane, Petroli, Mafuta ya taa, Dizeli, Mafuta ya petroli | Etha, Acetaldehyde, Trimethylamine | Ethyl Nitrite | |
IIB | Propylene, Asetilini, Cyclopropane, Gesi ya Oveni ya Coke | Epoxy Z-Alkane, Propane ya Epoxy, Butadiene, Ethilini | Etha ya Dimethyl, Isoprene, Sulfidi ya hidrojeni | Diethylether, Etha ya Dibutyl | ||
IIC | Gesi ya Maji, Haidrojeni | Asetilini | Disulfidi ya kaboni | Nitrati ya ethyl |
Vifaa vimepangwa katika uainishaji sita wa joto, kutoka T1 hadi T6, imedhamiriwa na kiwango cha juu cha joto kinachoruhusiwa cha uso.