Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Venting of enclosures
5 Sizing of vent areas
6 Supplementary design considerations
7 Marking
8 Information for use
Annex A (informative) - Explosion venting of dust filters
Annex B (informative) - Explosion venting of cyclones
Annex C (informative) - Estimating the L/D ratio when
        calculating vent areas for elongated enclosures
Annex D (informative) - Protection of buildings
Annex E (informative) - Deflectors
Annex F (informative) - Significant changes between
        this European Standard and EN 14491:2006
Annex ZA (informative) - Relationship between this
         European Standard and the Essential Requirements
         of EU Directive 94/9/EC
Bibliography