Videotec IRMEL EXPT Mode D'emploi page 12

E Ex d
EEx d IIC T6
This shows the classification of a selection of gases and vapours into explosion groups and temperature
classes.
T1
I
Methane
IIA Acetone
Ethane
Ethyl acetate
Ammonia
Benzene (pure)
Acetic acid
Carbon monoxide
Methanol
Propane
Toluene
IIB Town gas (Coal gas) Ethylene
IIC Hydrogen
Note:
A higher T class automatically covers gases in lower T class groups (T6 is better than T1).
In addition: IIB also covers IIA.
IIC also covers IIB and IIA.
IIC T6
T2
Ethyl alcohol Benzine
I-arnyl acetate Diesel fuel
n-butane Aircraft fuel
n-butyl alcohol Heating oil
n-hexane
Acetylene
E: Certified to Cenelec Standard
Ex: Explosion protected
d: Flame proof
IIC: Gas group hydrogen
T6: Temperature classification to 80°C
T3 T4
Acetaldehyde
Ethyl ether
T5
Carbon disulphide Ethyl nitrate
T6