Explosive atmosphere caused by mixture of air and: |
Hazardous areas classification |
Explosion probability |
gas, liquid and vapours (Zone G) |
0 |
constant explosion risk lasting for a long period of time |
1 |
occasional explosion risk |
2 |
no explosion risk during regular work, shall any occur it lasts for a short period of time |
flammable dust (Zone D) |
20 |
constant explosion risk lasting for a long period of time |
21 |
occasional explosion risk |
22 |
no explosion risk during regular work, shall any occur it lasts for a short period of time |