SCHEDULE 2Essential health and safety requirements relating to the design and construction of equipment and protective systems intended for use in potentially explosive atmospheres
Enclosed structures and prevention of leaks1.2.3
Equipment which may release flammable gases or dusts must wherever possible employ enclosed structures only.
If equipment contains openings or non-tight joints, these must as far as possible be designed in such a way that developing gases or dusts cannot give rise to explosive atmospheres outside the equipment.
Points where materials are introduced or drawn off must, as far as possible, be designed and equipped so as to limit escapes of flammable materials during filling or draining.