NEN EN 14491 : 2012
Current
The latest, up-to-date edition.
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Venting of enclosures
5 Sizing of vent areas
5.1 General
5.2 Venting of isolated enclosures
5.3 Special dust cloud conditions
5.4 Protection of pipelines and interconnected
enclosures
5.5 Protection of buildings
5.5.1 General
5.5.2 Calculating the vent area
5.5.3 Calculation of internal surface area
5.6 Influences of vent ducts
5.7 Hybrid mixtures
6 Positioning of vents
7 Supplementary design considerations
7.1 General
7.2 Explosion effects external to the vent
7.2.1 General
7.2.2 Flame effects
7.2.3 Pressure effects
7.2.4 Deflectors
7.2.5 Effects of flameless explosion venting devices
7.3 Deformation of the vented enclosure
7.3.1 Recoil forces
7.3.2 Vacuum breakers
8 Information for use
8.1 Marking
8.2 Accompanying documents
Annex A (informative) Estimating the L/D ratio when
calculating vent areas for elongated enclosures
Annex ZA (informative) Relationship between this European
Standard and the Essential Requirements of EU
Directive 94/9/EC
Bibliography
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