Shenhai Explosion-Proof
The ‘B’ classification denotes the approved level of equipment for handling gases and vapors within a facility, typically used for substances like ethylene, dimethyl ether, and coke oven gas.
| Temperature group of electrical equipment | Maximum allowable surface temperature of electrical equipment (℃) | Gas/vapor ignition temperature (℃) | Applicable device temperature levels |
|---|---|---|---|
| T1 | 450 | ＞450 | T1~T6 |
| T2 | 300 | ＞300 | T2~T6 |
| T3 | 200 | ＞200 | T3~T6 |
| T4 | 135 | ＞135 | T4~T6 |
| T5 | 100 | ＞100 | T5~T6 |
| T6 | 85 | ＞85 | T6 |
The ‘T’ category specifies temperature groups, where T4 equipment has a maximum surface temperature of 135°C, and T6 equipment maintains a maximum surface temperature of 85°C.
Since T6 equipment operates at a lower surface temperature compared to T4, it reduces the likelihood of igniting explosive gases. Consequently, BT6 is superior to BT4.