Menene Ma'anar Fashe-Hujja Level AT4

A: Gas na Propane yana misalta yanayin Class A.

Daraja Da Matsayi	Wutar wuta da Rukuni
-	T1	T2	T3	T4	T5	T6
-	T;450	450≥T sama da 300	300≥T ：200	200≥T：135	135≥T 100	100≥T：85
I	Methane
IIA	Ethane, Propane, Acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzene, Ammonia, Carbon Monoxide, Ethyl acetate, Acetic acid	Butane, Ethanol, Propylene, Butanol, Acetic acid, Butyl Ester, Amyl acetate acetic anhydride	Pentane, Hexane, Heptane, Decane, Octane, fetur, Hydrogen sulfide, Cyclohexane, fetur, Kerosene, Diesel, Man fetur	Ether, Acetaldehyde, Trimethylamine		Ethyl nitrite
IIB	Propylene, Acetylene, Cyclopropane, Coke Oven Gas	Epoxy Z-Alkane, Epoxy Propane, Butadiene, Ethylene	Dimethyl Ether, Isoprene, Hydrogen sulfide	Diethylether, Dibutyl Ether
IIC	Ruwan Gas, Hydrogen	Acetylene			Carbon Disulfide	Ethyl nitrate

T4: 'T’ yana nuna zafin jiki, kasassu zuwa shida matakai. T4 yana ƙayyadaddun cewa madaidaicin zafin jiki na kayan aikin bai wuce 135 ° C ba.