The BT5 explosion-proof rating is considered high.
| Gaz Sınıflandırması | Sıcaklık Grubu | |||||
|---|---|---|---|---|---|---|
| - | T1 | T2 | T3 | T4 | T5 | T6 |
| - | T＞450 | 450 ≥ T > 300 | 300 ≥ T > 200 | 200≥T＞135 | 135 ≥ T > 100 | 100 ≥ T > 85 |
| I | Metan | |||||
| IIA | Etan, Propan, Aseton, Fenetil, Ene, Aminobenzen, Toluen, Benzen, Amonyak, Karbonmonoksit, Etil asetat, Asetik asit | Bütan, Etanol, Propilen, Butanol, Asetik Asit, Butil Ester, Amil Asetat, Asetik Anhidrit | Pentan, Heksan, Heptan, Dekan, Oktan, Benzin, Hidrojen Sülfür, Sikloheksan, Benzin, Kerosen, Dizel, Petrol | Eter, Asetaldehit, Trimetilamin | Etil Nitrit | |
| IIB | Propilen, Asetilen, Siklopropan, Kok Fırını Gazı | Epoksi-Z-alkan, Epoksi-propan, Butadien, Etilen | Dimetil Eter, İzopren, Hidrojen Sülfür | Dietil eter, Dibutil eter | ||
| IIC | Su Gazı, Hidrojen | Asetilen | Karbon Disülfür | Etil Nitrat | ||
All units are rated at IIB level. However, T4 equipment has a maximum surface temperature limit of 135°C, whereas T5 equipment is limited to 100°C. Lower maximum surface temperatures indicate greater safety. Thus, equipment compliant with BT5 standards is also compatible with BT4, but the reverse does not apply.
