P
RODUCT INFORMATION
Explosion groups and temperature classes of the most important gases and vapours (-selection-)
in
accordance with (DIN VDE 0165
und IEC 60079-20
Explosion pro-
tection group
Temperature class
T1
T2
T3
T4
T5
T6
Ignition temperature
>
450
◦
C
450-300
◦
C
300-200
◦
C
200-135
◦
C
135-100
◦
C
100-85
◦
C
Maximum permissible surface temperature of operating facilities
450
◦
C
300
◦
C
200
◦
C
135
◦
C
100
◦
C
85
◦
C
II A
Acetone
Ammonia
Aniline
Benzene
Chlorbenzene
1,2-
Dichlorbenzene
Acetic acid
Ethane
Ethyl acetate
(Ethyl bromide)
Ethyl chloride
(carbon monoxid)
o-Cresol
Methane
Methyl acetate
∗
Methyl alcohol
Methyl bromide
Methyl chloride
Methylene chlo-
ride
Naphthalene
(Nitrobenzene)
Phenol
Propane
Toluene
o-Xylene
(Ethyl alcohol)
(Ethyl glycol)
i-Amyl acetate
n-Butane
n-Butyl alcohol
1-Butylene
1,2-Dichlorethane
Di-i-Propyl ether
Natural gas
Acetic anhydride
n-Propy lacetate
(n-Propyl alcohol)
i-Propyl alcohol
Vinyl chloride
n-Amyl alcohol
Petrol
(fuel)
Diesel
Heating oil
n-Hexane
Jet fuels
Acetaldehyde
II B
Hydocyanic acid
(Ethyl bromide)
(carbon monox-
ide)
(nitrobenzene)
Town gas
Butadine-1,3
Dioxane-1,4
Divinyl ether
(Ethyl alcohol)
Ethylene
(Ethyle glycol)
∗∗
Ethylen oxide
Isoprene
(n-Propylalkohol)
Dimethyl ether
∗∗
Hydrogen-
sulphide
Ethyl ether
Ether
Schwefel ether
Diethyl ether
II C
∗∗
Hydrogen
∗∗
Acetylene
∗∗
Carbon-
disulphide
():
For the substances placed in the brackets, the measured values for the classification in the ex-
plosion group or temperature class are near the limit for the next group or class. For this reason,
they have been included in both.
∗∗
:
extremely flammable substances (cf. additional marking “X”)
∗
:
(Methanol = methyl alcohol)
1
DIN VDE 0165: Errichten elektrischer Anlagen in explosionsgef ¨ahrdeten Bereichen, 1991
2
Redeker, Sch ¨on: 6. Nachtrag zu Sicherheitstechnische Kennzahlen brennbarer Gase und D ¨ampfe, 2. Auflage, 1990
3
Nabert, Sch ¨on: Sicherheitstechnische Kennzahlen brennbarer Gase und D ¨ampfe, 2. Auflage, 1978
4
IEC 60079-12: Electrical apparatus for explosive gas atmospheres, Part 12: Classification of mixtures of gases and vapours with air
according to their maximum experimental safe gaps and minimum igniting currents, 1978
5
IEC 60079-20: Electrical apparatus for explosive gas atmospheres, Part 20: Data for flammable gases and vapours, relating to the
use of electric apparatus, 1996-10
Page
22
of 60
Doc.-No.: VA053957-40-OM-EN-0720-60-2
