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.
arpadveress 
