I “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).
Isigaba Sesimo | Ukuhlukaniswa Kwegesi | Amagesi amele | I-Minimum Ignition Spark Energy |
---|---|---|---|
Ngaphansi Kwemayini | I | I-Methane | 0.280mJ |
Izimboni Ngaphandle Kwezimayini | IIA | I-Propane | 0.180mJ |
IIB | I-Ethylene | 0.060mJ | |
I-IIC | I-hydrogen | 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, i-acetylene, carbon disulfide, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, futhi i-hydrogen i-sulfide. The IIA classification includes gases such as methane, ethane, benzene, futhi diesel.