PREN 14797 : DRAFT 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General principles of design
   4.1 General
   4.2 Potential sources of ignition
5 Types of explosion venting devices
   5.1 Explosion venting devices with re-usable elements (see annex A)
   5.2 Explosion venting devices with non re-usable elements
   5.3 Flameless explosion venting devices
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 Determination of the static activation pressure
   7.3 Explosion testing
   7.4 Leak testing
   7.5 Flameless explosion venting devices
8 Instructions
9 Assembly, replacements or re-usability
10 Marking
   10.1 General
   10.2 Devices with re-usable elements and flameless devices
   10.3 Devices with non re-usable elements and flameless
        devices
   10.4 Omission of markings
11 Documentation
12 Packaging
   12.1 General
   12.2 Marking
Annex A (informative) Examples for explosion venting devices
        A.1 Explosion venting devices with re-usable elements
        A.2 Explosion venting devices with non re-usable elements
Annex B (informative) Need for test
Annex ZA (informative) Clauses of this European Standard addressing
         essential requirements or other provisions of EU Directives
Bibliography

Describes the requirements for venting devices used to protect enclosures against internal explosions.