Heerka Caddeynta Qarxa Keebaa Sare, BT4 ama CT6

Qaabka BT4 waxa lagu sifeeyay heerka B ee aan qarxin karin oo leh heer kulka T4, stipulating that the equipment’s surface temperature cannot exceed 135°C.

Heerka Iyo Heerka	Heerkulka Dabka Iyo Kooxda
-	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	Ethane, Propane, Acetone, Phenethyl, Ene, Aminobenzene, Toluene, Benzene, Ammonia, Kaarboon monoksaydh, Ethyl acetate, Acid acid	Butane, Ethanol, Propylene, Butanol, Acid acid, Butyl Ester, Amyl Acetate Acetic Anhydride	Pentane, Hexane, Heptane, Decane, Octane, Shidaal, Hydrogen Sulfide, Cyclohexane, Shidaal, Kerosene, Naaftada, Batroolka	Eter, Acetaldehyde, Trimethylamine		Ethyl Nitrite
IIB	Propylene, Acetylene, Cyclopropane, Coke Oven Gaas	Epoxy Z-Alkane, Epoxy Propane, Butadiene, Ethylene	Dimethyl Ether, Isprene, Hydrogen Sulfide	Diethylether, Dibutyl Ether
IIC	Gaaska Biyaha, Hydrogen	Acetylene			Kaarboon Disulfide	Ethyl Nitrate

Taa lidkeeda, Qaabka CT6 waxa uu hayaa heerka C heerka-iska-caabbinta qaraxa, covering the requirements of BT4 and applicable to zones with dangerous gases like hydrogen and acetylene. T6 equipment must maintain a surface temperature no higher than 85°C.

Dhanka heerkulka categories, T6 represents the highest safety level, suggesting that a lower equipment surface temperature is preferable.

Natiijo ahaan, CT6 possesses a superior explosion-proof classification.