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WhatDoesExplosion-ProofLevelABCMean|ExplicationOfTerms

Explicatio Termini

Quid Explosio-Probatur Level ABC Mean

The “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).

Conditio CategoriaGas ClassificationRepraesentativas gasorumMinimam ignitionem scintilla Energy
Sub MeoegoMethane0.280mJ
Factories extra meumIIAPropane0.180mJ
IIBEthylene0.060mJ
IICHydrogenium0.019mJ

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, ipsum disulfide, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, et hydrogen sulfide. The IIA classification includes gases such as methane, ethane, benzene, et diesel.

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