Temperature classes:
The max. surface temperature of the operating material must always be less than the ignition
temperature of the gas-vapour-air mixture. Operating materials which are classed in higher
temperature classes are approved in all areas where lower temperature classes are required.
List of gases and
vapours
Deployability
of the
operating
materials
Explosion sub-
group II
for ignition prot.
type
d, i, n
Gases &
vapours
IIA
IIA
Ammonia
Methane
Ethane
propane
Ethyl alcohol
Cyclohexane
n-butane
Benzene gen. jet
fuels
n-hexane
Acetaldehyde
II B
IIB
Acrylnitride
City gas
Ethylene
Ethylene
oxide
Ethylene glycol
Hydr. sulphide
Ethyl ether
IIC
IIC
Hydr.
Acetylene
Ethin
Carbon
disulfite
Temperature class :
Classification of gases, vapours and mists acc. to ignition
temperature
T1
max. 450
℃
T2
max. 300
℃
T3
max. 200
℃
T4
max. 135
℃
T5
max.
100
℃
T6
max. 85
℃
Deployability of Operating Material
------------->T1
------------------------------ >T2
------------------------------------------------------- >T3
------------------------------------------------------------------------- >T4
------------------------------------------------------------------------------------- >T5
---------------------------------------------------------------------------------------- ---------->T6
In potentially explosive areas with combustible dusts, the surfaces should not exceed a
temperature which is 2/3 of the ignition temperature in °C of the dust/air mix. The
indication of a temperature class related to the PLANETA hoist assumes an ambient
temperature between -20°C and +40°C. The heat resistance of the chains and hooks is
+150°C. For stationary outdoor operation, the standard chain hoists must be protected
from the weather and maintenance intervals must be reduced.
