The explosion-proof classification of CT4 equipment surpasses that of BT4 equipment.
| Gāzes klasifikācija | Temperatūras grupa | |||||
|---|---|---|---|---|---|---|
| - | T1 | T2 | T3 | T4 | T5 | T6 |
| - | T＞450 | 450 ≥ T > 300 | 300 ≥ T > 200 | 200≥T＞135 | 135 ≥ T > 100 | 100 ≥ T > 85 |
| I | Metāns | |||||
| IIA | Etāns, propāns, acetons, fenetils, enē, aminobenzols, toluols, benzols, amonjaks, oglekļa monoksīds, etilacetāts, etiķskābe | Butāns, etanols, propilēns, butanols, etiķskābe, butilesteris, amilacetāts, etiķskābes anhidrīds | Pentāns, heksāns, heptāns, dekāns, oktāns, benzīns, sērūdeņradis, cikloheksāns, benzīns, petroleja, dīzeļdegviela, nafta | Ēters, acetaldehīds, trimetilamīns | Etilnitrīts | |
| IIB | Propilēns, acetilēns, ciklopropāns, koksa krāsns gāze | Epoksīda Z-alkāns, epoksīda propāns, butadiēns, etilēns | Dimetilēteris, izoprēns, sērūdeņradis | Dietilēteris, dibutilēteris | ||
| IIC | Ūdens gāze, ūdeņradis | Acetilēns | Oglekļa disulfīds | Etilnitrāts | ||
BT4 is classified as a Class B temperature group, where the maximum surface temperature of T4-rated devices does not exceed 135°C. CT4 holds a Class C explosion-proof rating, comparable to BT4, and is suitable for environments with hazardous gases such as hydrogen and acetylene, maintaining a maximum surface temperature of 135°C.
Scope of Use
BT4 is suitable for common gases including methane, ethane, petroleum, and hydrogen sulfide.
CT4 encompasses a broader range of less common explosive gases, such as hydrogen and water gas at the CT1 level, acetylene at the CT2 level, and carbon disulfide at the CT4 level.
