What Does Explosion-Proof Level ABC Mean

A “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).

Állapot kategória	Gázosztályozás	Reprezentatív gázok	Minimális gyújtási szikraenergia
A bánya alatt	én	Metán	0.280mJ
Gyárak a bányán kívül	IIA	Propán	0.180mJ
	IIB	Etilén	0.060mJ
	IIC	Hidrogén	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, acetilén, szén-diszulfid, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, és hidrogén sulfide. The IIA classification includes gases such as methane, etán, benzol, és diesel.