22
•
For explosive atmospheres with gas and/or dust :
ATEX marking
IECEx marking
II 2 GD
Ex d IIB (
or
C) T4 Ex tD A21 IP6X T125ºC
or
T135ºC
or
Ex de IIC (
or
B) T4 Ex tD A21 IP6X T125ºC
or
T135ºC
European symbol for “Ex” products
II
Group of material designed for places with potentially explosive
atmospheres, other than mines susceptible to firedamp
2
Area where an explosive atmosphere, is likely to occur in case
of abnormal working conditions of the installation
GD
Explosive atmospheres with gas and/or dust
Ex
Symbol which indicates that the material complies with one or
several of the protection modes in accordance with European
standards
d
Enclosure with flameproof protection
e
Component with increased safety protection
B
Subdivision of group II
C
Subdivision of group II
T4
Temperature class
tD
Protection by enclosure
A21
Under procedure A for zone 21
IP6X
Íngress protection
T125ºC/T135ºC
Maximum surface temperature
•
For underground parts of mines :
ATEX marking
IECEx marking
I M 2
Ex d I
or
Ex de I
Ex d I
or
Ex de I
European symbol for “Ex” products
I
Group of
Equipment intend for use in underground parts of
mines, and to those parts of surface installations of mines,
liable to be endangered by firedamp and/or combustible dust
M2
Category of equipment ensuring a high level of protection and
intended to be de-energized in the event of an explosive
atmosphere being present
Ex
Symbol which indicates that the material complies with one or
