Na Kena e Cecere Cake na iVakatagedegede ni Kacabote-Ivakadinadina, BT4 se CT4

Na ivakatagedegede ni kacabote-ivakadinadina ni CT4 e sivia na iyaya ni BT4.

Kalasi kei na iVakatagedegede	Katakata kei na iLawalawa ni iVakatakilakila
-	T1	T2	T3	T4	T5	T6
-	T>450	450≥T>300	300≥T>200	200≥T>135	135≥T>100	100≥T>85
I	Meca
IIA	Ethane, Parofisai, Acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzene, Amonia, Kaboni Monoxide, Ethyl Acetate, Acetic Acid	Butane, Etano, Propylene, Butanol, Acetic Acid, Butyl Ester, Amyl Acetate Acetic Anhydride	Pentane, Hexane, Heptane, Decane, Okotova, Benisini, Hydrogen Sulfide, Cyclohexane, Benisini, Kerosene, Disi, Petroleum	Ica, Acetaldehyde, Trimethylamine		Ethyl Nitrite
IIB	Propylene, Acetylene, Cyclopropane, Coke Oven Gas	Epoxy Z-Alkane, Epoxy Propane, Butadiene, Ethylene	Dimethyl Ether, Isoprene, Hydrogen Sulfide	Vakabulabulataki, Dibutyl Ether
IIC	Kasi wai, Hydrogen	Acetylene			Disulfide ni Kaboni	Ethyl Nitrate

Na BT4 e vakatabakiduataki me dua na ilawalawa katakata ni kalasi B, na vanua e sega ni sivia kina na 135°C na ivakarau levu duadua ni gacagaca ni T4-rated. CT4 e tiko e dua na kalasi C kacabote-ivakadinadina rating, vakatauvatani kei na BT4, ka ganita na draki ka rerevaki na kena gasacala me vaka na hydrogen kei na acetylene, maroroi ni ivakarau levu duadua e dela ni 135°C.

iTuvatuva ni Kena Vakayagataki

BT4 e veiganiti kei na gasabato kilai levu oka kina na meta, ethane, petroleum, kei na hydrogen sulfide.

CT4 e kovuta e dua na ivakarau rabailevu ka sega soti ni dau yaco vakalevu kacabote gasa, me vaka na hydrogen kei na kasi wai ena ivakatagedegede CT1, acetylene ena CT2 ivakatagedegede, kei na disulfide ni kaboni ena ivakatagedegede NI CT4.