In the annex “B” are reported some example of hazardous zone classification in accordance with ATEX standards.
Below it’s reported an example extrapolated from the annex.
Figures B.5 e B.6 show the hazardous zones for an automatic spray booth for liquid coating material with
- 25 % < CLEL Liquid < 50 % in the internal volume of spray booth;
- 25 % < CLEL Liquid < 50 % in the internal volume of the exhaust air cleaning system;
- 25 % < CLEL Liquid < 50 % in the internal volume of the exhaust air ducting and recirculation air ducting.
* CLEL Liquid: concentration of flammable solvents (in air) in the spray booths as a percentage of LEL