Shenhai à prova de explosão
O “abc” represents gas classifications, categorized into three levels—IIA, IIB, and IIC—according to the maximum experimental safe gap (MESG) or the minimum igniting current (MIC).
| Categoria de condição | Classificação de Gás | Gases representativos | Energia mínima de faísca de ignição |
|---|---|---|---|
| Sob a mina | EU | Metano | 0.280mJ |
| Fábricas fora da mina | AII | Propano | 0.180mJ |
| IIB | Etileno | 0.060mJ | |
| CII | Hidrogênio | 0.019mJ |
Of these, the IIC classification is deemed the most hazardous, with IIB and IIA following in decreasing order of risk. Gases falling under the IIC classification include hydrogen, acetileno, dissulfeto de carbono, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, e hidrogênio sulfureto. The IIA classification includes gases such as methane, etano, benzeno, e diesel.