ATEX Code Definition

II 2 G Ex h IIC T4 Gb

II 2 D Ex h IIIC T135°C Db

-20°C ≤ Ta ≤ 40°C

Equipment group

II

Surface industry

Equipment category

Group II

2

High level of protection

• zone 1 (gas)

• zone 2 (gas)

• zone 21 (dust)

• zone 22 (dust)

Atmosphere

G

Atmosphere containing Gas, Vapors or Mist

D

Atmosphere containing Dust

Safety design

h

Mechanical product

Gas group

IIC

Hydrogene/ Acetylene

IIB

Ethylene

Dust group

IIIC

Surface combustible dust

Max surface temperature in Gas atmosphere

T1 = 450°C

T2 = 300°C

T3 = 200°C

T4 = 135°C

T5 = 100°C

T6 = 85°C

Max surface temperature in Dust atmosphere

Example temperatures:

T85°C

T100°C

T135°C

T200°C

T240°C