O fea le Tulaga e Fa'asao Pa'u e Sili Atu, BT5 poʻo BT4

O le BT5 faʻamaonia faʻamaonia faʻamaonia e manatu maualuga.

Vasega Ma Tulaga	Tempera Fa'amumu ma Vaega
-	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	Etana, Propane, Acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzene, Amonia, Carbon Monoxide, Ethyl Acetate, Acetic Acid	Butane, Ethanol, Propylene, Butanol, Acetic Acid, Butyl Ester, Amyl Acetate Acetic Anhydride	Pentane, Hexane, Heptane, Decane, Oktane, Gasolini, Hydrogen Sulfide, Cyclohexane, Gasolini, Kerosene, Tisele, Suauu	Eteru, Acetaldehyde, Trimethylamine		Ethyl Nitrite
IIB	Propylene, Acetylene, Cyclopropane, Kesi Oven Coke	Epoxy Z-Alkana, Epoxy Propane, Butadiene, Ethylene	Dimethyl Eteru, Isoprene, Hydrogen Sulfide	Diethyleter, Dibutyl Eteru
IIC	Vai Kasa, Hydrogen	Acetylene			Carbon Disulfide	Ethyl Nitrate

O iunite uma e fa'atatau ile tulaga IIB. Peitai, O meafaigaluega T4 o lo'o i ai le tapulaa maualuga o le vevela o le luga ole 135°C, ae o meafaigaluega T5 e gata i le 100°C. O le maualuga o le maualuga o le maualuga o le vevela e faʻaalia ai le saogalemu sili atu. O lea, meafaigaluega e ogatasi ma tulaga BT5 e tutusa foi ma le BT4, ae le aoga le faafeagai.