Hazardous area equipment is specified in terms of the types of gases present, being:
|
GROUP I |
For Mining applications |
|
|
|
|
GROUP II |
For general industry |
Equipment must be categorised as being suitable for use with gases in
Group II industries.
GROUP I equipment has a representative gas of Methane and all equipment used in underground
applications fall into this category. Any other equipment will be Group II classified.
As shown in the table below, Group II is again segmented into three different representative gas
groups, Propane, Ethylene and Hydrogen. Group II A, II B,
IIC respectively.
 |
| Group
Classification |
Representative Gas |
|
| I |
Methane |
|
| IIA |
Propane |
|
| IIB |
Ethylene |
|
| IIC |
Hydrogen |
|
As stated these are only gases representative where in fact there are many different types of
gases one can be presented with when classifying equipment.
|
