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TM<br />
Hazardous Location and Explosionproof Classifications<br />
ATEX<br />
EU Explosive<br />
Atmosphere Symbol<br />
Equipment Group<br />
I. Mining:<br />
M1 = Energized<br />
M2 = De-energized<br />
II. Non- Mining<br />
Equipment Category<br />
1 = Very high protection<br />
2 = High protection<br />
3 = Normal protection<br />
Gas/Dust<br />
Zones<br />
Gas Dust<br />
0 20<br />
1 21<br />
2 22<br />
II 2 GD EEx d IIB T6<br />
Type of Protection<br />
Intrinsic Safety<br />
Increased Safety<br />
Flameproof<br />
Pressurization<br />
Powder Filing<br />
Encapsulation<br />
Oil Immersion<br />
Type ‘n’<br />
Gas Group<br />
Gas Group<br />
I<br />
IIA<br />
IIB<br />
IIC<br />
Temperature<br />
Max. Surface<br />
Code Temp. (°C)<br />
T1 450<br />
T2 300<br />
T3 200<br />
T4 135<br />
T5 100<br />
T6 85<br />
Sample Gas<br />
Methane (mining only)<br />
Propane<br />
Ethylene<br />
Hydrogen<br />
Cenelec Code<br />
EEx ia / ib<br />
EEx e<br />
EEx d<br />
EEx p<br />
EEx q<br />
EEx m<br />
EEx o<br />
EEx n<br />
The ATEX directive consists of two EU<br />
directives that describe what equipment<br />
and work environment is allowable<br />
in an environment with an explosive<br />
atmosphere. ATEX derives its name from<br />
the French title of the 94/9/EC directive:<br />
Appareils destinés à être utilisés en<br />
ATmosphères Explosives.<br />
As of July 2003, organizations in the EU<br />
must follow the directives to protect<br />
employees from explosion risk in areas<br />
with an explosive atmosphere.<br />
There are two ATEX directives, one for<br />
the manufacturer and one for the user<br />
of the equipment:<br />
• ATEX 95 equipment directive<br />
94/9/EC, Equipment and protective<br />
systems intended for use in<br />
potentially explosive atmospheres;<br />
• ATEX 137 workplace directive<br />
99/92/EC, Minimum requirements<br />
for improving the safety and health<br />
protection of workers potentially at<br />
risk from explosive atmospheres.<br />
European<br />
Zones Definitions<br />
North American<br />
Classification<br />
ATEX<br />
Categories<br />
Gas 0<br />
Class I, Division 1 1G<br />
A place in which an<br />
explosive atmosphere is<br />
continuously present<br />
Dust 20 Class II, Division 1 1D<br />
Gas<br />
Dust<br />
1<br />
21<br />
A place in which an<br />
explosive atmosphere is<br />
likely to occur in normal<br />
operation occasionally<br />
Class I, Division 1<br />
Class II, Division 1<br />
2G<br />
2D<br />
Gas 2<br />
A place in which an<br />
explosive atmosphere<br />
is not likely to occur in<br />
normal operation but if it<br />
Class I, Division 2 3G<br />
Dust 22<br />
does, only occurs for short<br />
periods<br />
Class II, Division 2 3D<br />
Typical Zone<br />
Suitability<br />
Equipment<br />
suitable for<br />
Zone 0<br />
Equipment<br />
suitable for<br />
Zone 20<br />
Equipment<br />
suitable for<br />
Zone 1<br />
Equipment<br />
suitable for<br />
Zone 21<br />
Equipment<br />
suitable for<br />
Zone 2<br />
Equipment<br />
suitable for<br />
Zone 22<br />
18<br />
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