O fea le Tulaga e Fa'asao Pa'u e Sili Atu, BT4 poʻo CT6

O le fa'ata'ita'iga BT4 o lo'o fa'avasegaina i lalo ole Vasega B fa'asa'o fa'alavelave fa'atasi ma le fua fa'atatau ole vevela ole T4, fa'atonuina e le mafai ona sili atu i le 135°C le vevela o le masini.

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

I le isi itu, o le CT6 faʻataʻitaʻiga o loʻo umia se Vasega C faʻataʻitaʻiga-faʻamaonia, e aofia ai mana'oga o le BT4 ma fa'atatau i sone o lo'o iai kasa mata'utia e pei o le hydrogen ma le acetylene. O masini T6 e tatau ona fa'atumauina le vevela i luga ole laiga e le sili atu ile 85°C.

I se faiga vevela vaega, T6 o loʻo faʻatusalia le maualuga maualuga o le saogalemu, fa'ailoa mai e sili atu le maualalo o le vevela o le masini.

O le faaiuga, O le CT6 o lo'o i ai se fa'avasegaga sili atu ona pa'u.