の “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).
状態のカテゴリ | ガスの分類 | 代表的なガス | 最小点火火花エネルギー |
---|---|---|---|
アンダー・ザ・マイン | 私 | メタン | 0.280mJ |
鉱山の外の工場 | IIA | プロパン | 0.180mJ |
IIB | エチレン | 0.060mJ | |
IIC | 水素 | 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, アセチレン, 二硫化炭素, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, と 水素 硫化物. The IIA classification includes gases such as methane, エタン, ベンゼン, と ディーゼル.