TAMESON
Labeling of Explosion Proof Equipment According to ATEX Directives
Equipment
Group
Application
I
Other Industries
Example
1:
Definition
Complies with European Directive
Notified Body Number
Specific Marking for Explosion Protection
2:
3:
Protection
Symbol
Zones
Type of Protection
1
2
d
•
•
Flameproof enclosure
e
•
•
Increased safety
•
•
•
•
ia
i
0
•
ib
ic
ma
m
•
•
•
•
•
mc
Moulding
•
•
Oil immersion
q
•
•
Powder filling
nA
•
Non-sparking
nC
•
Enclosed break
nR
•
Restricted
nL
•
Limited energy
px
•
•
py
•
•
Normal Operation
M2
Continuously for Long
Periods or Frequently
Very High
Two Faults
1
Occasionally
High
One Fault
2
Unlikely or Infrequently and
for a Short Period
Normal
Normal Operation
3
Pressurised enclosure
Type of
Environment
Group & Class
Mines
I
IIA
Explosive
Gases
Explosive
Dusts
IIC
III
A
Flammable fibers
B
Non-conductive dust
C
Conductive dust
City Gas
Acrylic
nitrile
Ethylene
Ethylen
oxide
Ethyl ether
Hydrogen
Acetylene
•
tb
tc
maD
•
•
•
•
Protection by enclosure
•
•
•
•
•
•
Encapsulation
•
mbD
mcD
iaD
ibD
Type of Protection
•
•
•
•
icD
•
Dust
Zone 20
Gas
Zone 1
Dust
Zone 21
Gas
Zone 2
Dust
Zone 22
Ethyl glycol
Carbon
hydrogen
Carbon
disulphide
Zone Classification/Equipment
Category
Equipment Protection Level (EPL)
Zone 0/1G
Zone 1/2G
Ga
Gb
Zone 2/3G
Intrinsic safety
•
•
Zone 0
T6 <85° C
•
•
Gas
Attention: this list is only a selection of possible flammable mediums and is not
complete!
•
22
Dust
Acetal-dehyde
Op sh
21
Gas
Petrol
Ethanol
Diesel Fuel
Cyclohexane
Fuel Oil
n-Butane
n-Hexane
•
20
Dust
Ammonia
Methane
Ethane
Propane
•
Zones
Gas
Temperatures according to coal dust accumulation on equipment
(< 150°C for coal mines or < 450°C for not coal mine tunnels)
Firedamp
Op pr
Optical radiation
Zone
Classification
Hazardous Material in the Atmosphere
T2 <300° C
For dust explosion
proof, the max. surface T3 <200° C
temperature is directly T4 <135° C
shown (e.g. T80°C)
T5 <100° C
•
Explosive
Atmosphere
Contains
Gb
II 2G Ex d IIC T6
II 1D Ex ta IIIA T80°C Da
Mb
I M2 Ex d I
•
ta
pD
High
•
Protection
Symbol
iD
De-energised
T1 <450° C
Op is
mD
M1
•
pz
tD
Two Faults
IIB
•
Op
Very High
Expectancy of the
Occurrence of an
Explosive
Atmosphere
II
Intrinsic safety
o
p
Remain Functional
•
mb
n
Required
Performance in the
Event of an
Explosive
Atmosphere
Equipment
Category
Level of Protection
Zone 20/1D
Zone 21/2D
Pressurised enclosure
Gc
Da
Db
Zone 22/3D
NA/M1
Ma
NA/M2
Mb
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Dc
Temperature Class
0158
Mining
Equipment Categorized by