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What Does Explosion-Proof Level ABC Mean

Ko te “abcrepresents gas classifications, categorized into three levels—IIA, IIB, and IIC—according to the maximum experimental safe gap (MESG) or the minimum igniting current (MIC).

Kāwai TikangaTe whakarōpū hauNga hau maaoriPūngao korakora iti rawa
I raro i te MainaIMewaro0.280mJ
Nga wheketere i waho o te mainaIIAPropane0.180mJ
IIBEthylene0.060mJ
IIChauwai0.019mJ

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, acetylene, carbon disulfide, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, a hauwai sulfide. The IIA classification includes gases such as methane, ethane, te pene, a diesel.

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