NEN EN 14797 : 2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Design requirements
   4.1 General
   4.2 Potential sources of ignition
5 Types of explosion venting devices
   5.1 Explosion venting devices with reusable elements
   5.2 Explosion venting devices with non reusable elements
6 Back pressure supports
   6.1 General
   6.2 Opening back pressure supports
   6.3 Non-opening back pressure supports
7 Testing of explosion venting devices
   7.1 General
   7.2 Static activation pressure
   7.3 Explosion testing
8 Information for use
9 Assembly, replacements or reusability
10 Marking
   10.1 General
   10.2 Explosion venting devices with reusable retaining
        elements
   10.3 Explosion venting devices with non-reusable
        retaining elements
   10.4 Omission of markings
11 Packaging
   11.1 General
   11.2 Marking
Annex A (informative) Examples for explosion venting devices
      A.1 Re-closing explosion venting devices
      A.2 Devices which require manual repositioning or
          replacement of the retaining element
      A.3 Devices with non reusable elements
Annex B (informative) Service and maintenance
      B.1 General
      B.2 Servicing
Annex ZA (informative) Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 94/9/EC
Bibliography
Figures
Tables

Describes the requirements for venting devices used to protect enclosures against the major effects of internal explosions arising from the rapid burning of suspended dust, vapour or gas contained within. It includes the requirements for the design, inspection, testing, marking, documentation and packaging.