Beda Antara Ledakan-Buktina Level AT4 na BT4

Duanana kategori ngajaga klasifikasi suhu T4, sahingga bédana timbul antara Zona A sareng Zona B. Ledakan-bukti rating BT4 ngaleuwihan AT4.

Kategori Kaayaan	Klasifikasi Gas	Gas ngawakilan	Énergi Spark Ignition Minimum
Di handapeun Tambang	abdi	Métana	0.280mJ
Pabrik di luar Tambang	IIA	propana	0.180mJ
	IIB	Étiléna	0.060mJ
	IIC	hidrogén	0.019mJ

Aya béda anu signifikan antara Kelas ⅱa sareng Kelas ⅱb. Kelas ⅱb, tingkat luhur, is typically designated for fuels like béngsin, solar, and crude oil; Class ⅱa, di sisi anu sanésna, applies to standard explosion-proof areas, such as for propylene.

It primarily depends on whether a substance falls under Class ⅱa or Class ⅱb. Equipment rated for Class ⅱa can be utilized in Class ⅱa environments; kumaha oge, Class ⅱb environments cannot employ Class ⅱa equipment.