Be safe ATEX Ratings
Gas protection: II 2G Ex ib IIA T4 Gb / II 2G Ex ib IIC T4 Gb II
Dust protection: II 2D Ex ib IIIC T130°C Db II
Equipment group II: “other” environments (not mining areas susceptible to firedamp) where explosive atmospheres may be present, eg oil & gas operations, chemical production and manufacturing processes involving dust Gas, vapour and mist equipment category: high protection for use in Zone 1 (explosive atmosphere is likely to occur in normal operation) and Zone 2 (not likely to occur or if it does is only of short duration) Explosion-proof equipment, certified to ATEX Directive and IECEx Protection type: intrinsic safety, limit potential ignition energy and surface temperature
Equipment group II: “other” environments
2D
Dust equipment category: high protection for use in Zone 21 (explosive atmosphere is likely to occur in normal operation) and Zone 22 (not likely to occur or if it does is only of short duration) Explosion-proof equipment, certified to ATEX Directive and IECEx Protection type: intrinsic safety, limit potential ignition energy and surface temperature
2G
Ex
ib
Ex
IIIC Dust group: protection in the most explosive dust environment (conductive) T130°C Temperature classification: device surface temperature will not exceed 130°C Db Equipment protection level: flame retardant ATEX ingress protection: ATEX IP rating (defined in IEC60079) requires more rigorous testing than standard IP rating (IEC60529) to ensure equipment is safe for use in potentially explosive environments. With ATEX IP testing, the equipment is first subjected to 28 days of thermal endurance tests followed by hot or cold ball impact before undergoing the IP testing. Standard IP testing does not subject the equipment to these stress conditions before carrying out the IP tests.
ib
IIA IIC
Gas group: IIA (typical gas propane)
Gas group: IIC protection in the most explosive gas environment (typical gas hydrogen/acetylene) Temperature classification: device surface temperature will not exceed 135°C
T4
Gb
Equipment protection level: flame retardant
Mining protection: I M2 Ex ib I Mb I
Equipment group I: mines and surface installations at risk of combustible dust or firedamp Equipment category M2, must be possible to switch off device if an explosive atmosphere occurs Explosion-proof equipment, certified to ATEX Directive and IECEx Protection type: intrinsic safety, limit potential ignition energy and surface temperature
M2
IP6x
Dust-tight, no ingress of dust
IPx6
Water resistant, protected against strong jets of water
Ex
ib
IPx8
Waterproof, withstands immersion in water
I
Explosion group: methane, coal dust
Mb
Equipment protection level: flame retardant
2
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