What Does Explosion-Proof Level ABC Mean

The “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).

Būklės kategorija	Dujų klasifikacija	Reprezentatyvios dujos	Minimali uždegimo kibirkšties energija
Pagal kasyklą	aš	Metanas	0.280mJ
Gamyklos už kasyklos	IIA	Propanas	0.180mJ
	IIB	Etilenas	0.060mJ
	IIC	Vandenilis	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, acetilenas, carbon disulfide, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, ir vandenilis sulfide. The IIA classification includes gases such as methane, etanas, benzenas, ir diesel.