Lithetha ukuthini iNqanaba le-AT4 lobungqina bokudubula

A: Irhasi yepropane ingumzekelo wokusingqongileyo weKlasi A.

Iklasi kunye neNqanaba	Ubushushu bomlilo kunye neQela
-	T1	T2	T3	T4	T5	T6
-	T＞450	450≥T＞300	300≥T＞200	200≥T＞135	135≥T＞100	100≥T＞85
I	IMethane
IIA	I-Ethane, Ipropane, I-acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzeni, I-Amoniya, Ikhabhon monoxide, I-Ethyl Acetate, IAcetic Acid	Butane, I-Ethanol, Ipropylene, I-Butanol, IAcetic Acid, Butyl Ester, Amyl Acetate Acetic Anhydride	IPentane, Hexane, Heptane, Decane, I-Octane, Ipetroli, I-Hydrogen sulfide, Cyclohexane, Ipetroli, I-kerosene, Idizili, IPetroleum	Ether, IAcetaldehyde, I-Trimethylamine		Ethyl Nitrite
IIB	Ipropylene, Iacetylene, Cyclopropane, Igesi yeOveni yeCoke	Epoxy Z-Alkane, Epoxy Propane, Butadiene, Ethylene	I-Dimethyl Ether, I-isoprene, I-Hydrogen sulfide	Diethylether, Dibutyl Ether
IIC	Igesi yaManzi, Ihydrogen	Iacetylene			ICarbon Disulfide	Ethyl Nitrate

T4: Inqaku elithi ‘T’ ibonisa ubushushu, zahlulwe ngokwamanqanaba amathandathu. I-T4 icacisa ukuba ubushushu bomphezulu besixhobo abudluli kwi-135°C.