Farqiga udhaxeeya Heerka Caddeynta Qarxa AT4 iyo BT4

Labada qayboodba waxay ilaalinayaan kala soocida heerkulka T4, markaa farqiga u dhexeeya Aaga A iyo Zone B. Qiimaynta aan qarxinta lahayn ee BT4 ayaa ka badan ta AT4.

Qaybta Xaaladda	Soocidda Gaaska	Gaasas matale	Dabci Ugu Yar ee Spark Energy
Hoosta Miinada	I	Methane	0.280mJ
Warshado ka baxsan Miinada	IIA	Propane	0.180mJ
	IIB	Ethylene	0.060mJ
	IIC	Hydrogen	0.019mJ

Waxaa jira farqi weyn oo u dhexeeya fasalka ⅱa iyo fasalka ⅱb. Fasalka ⅱb, heerka sare, is typically designated for fuels like shidaal, naaftada, and crude oil; Class ⅱa, dhanka kale, 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; si kastaba ha ahaatee, Class ⅱb environments cannot employ Class ⅱa equipment.