Hazardous Area Industries do have various level of regulations, standardizations, directives and schemes related. All in charge have to be the most up-to-date.
Even if you are not an HA industry player, your daily life is full with Ex related issues: petrol stations, sugar, kakao powder, but wastewater network too may explode, if one does not give the minimum respect.
You are most welcome to the world of Ex.
At first sight, no risks, if no electrical charging process is likely to occur.
Very practical approach