Shenhai Explosionssäker
De “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).
| Tillståndskategori | Gasklassificering | Representativa gaser | Minsta tändgnistaenergi |
|---|---|---|---|
| Under Gruvan | jag | Metan | 0.280mJ |
| Fabriker utanför gruvan | IIA | Propan | 0.180mJ |
| IIB | Eten | 0.060mJ | |
| IIC | Väte | 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, acetylen, koldisulfid, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, och väte sulfide. The IIA classification includes gases such as methane, etan, bensen, och diesel.