What Does Explosion-Proof Level ABC Mean

द “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).

स्थिती श्रेणी	गॅस वर्गीकरण	प्रतिनिधी वायू	किमान इग्निशन स्पार्क एनर्जी
खाणीखाली	आय	मिथेन	0.280mJ
खाणीबाहेर कारखाने	IIA	प्रोपेन	0.180mJ
	IIB	इथिलीन	0.060mJ
	आयआयसी	हायड्रोजन	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, ऍसिटिलीन, कार्बन डायसल्फाइड, ethyl nitrate, and water gas. Those in the IIB category encompass ethylene, coke oven gas, propyne, आणि हायड्रोजन sulfide. The IIA classification includes gases such as methane, इथेन, बेंझिन, आणि diesel.