Zone
Zone
Zone
Gas
0
1
2
Dust
20
21
22
Explosion Group Cassification
Group
I
Mining
Eqip Used in Hazardous Gas Atmosphere
Group
II
A
Ammonia, Pheonal, Methene, Butane, and other gases
B
Ethyline oxide, Ethylne and other gases
C
Hydrogen, Phropylane and other gases
Eqip Used in Hazardous Cobmustable Dust Atmosphere
Group
III
A
Flammable Fiber
B
Non Conductive Dust
C
Conductive Dust
Groups
Gas
I
Ignition
Temperature Class
Tempera
T1
acetone
540
♦
acetic acide
485
♦
ammonia
630
♦
ethane
515
♦
methylene chloride
556
♦
methane (CH4)
537
♦
carbon monoxide
605
♦
propane
470
♦
n-butane
365
♦
n-butyl
370
♦
T2
T3
T4
T5
T6
methane (firedamp)
A
II
240
acetaldehyde
140
♦
ethyl ether
160
♦
ethyl nitrate
90
ethylene
B
C
♦
n-hexane
ethyl oxyde
425
♦
429-440
♦
hydrogen sulfide
270
acetylene (C2H2)
305
carbon disulphide (CS2)
102
hydrogen (H2)
560
Gas
♦
Tempera
ture
Butane
287ºC
Ethyl Acetate
425ºC
Acetylene
300ºC
Carbon Disulphide
90ºC
Hydrogen
500ºC
Acetone
465ºC
Ammonia
650ºC
Ethyl Nitrate
90ºC
Benzene
498ºC
Industrial Methane
535ºC
Carbon Monoxide
605ºC
♦
♦
♦
♦