EN 14373:2005

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Explosion suppression
  4.1 General
  4.2 Influencing factors
      4.2.1 General
      4.2.2 The explosion hazard
      4.2.3 The explosion suppressant
      4.2.4 The suppression system
      4.2.5 Interrelation
5 General requirements for explosion suppression components
  5.1 Detection
      5.1.1 General
      5.1.2 Optical detection
      5.1.3 Pressure detection
  5.2 Suppressant
  5.3 HRD-suppressors
  5.4 Control and Indicating Equipment, CIE
6 Requirements for the design of an explosion suppression system
  6.1 General
  6.2 Hazard definition
  6.3 Determination of the p[red, max] as a function of relevant
      influencing parameters
      6.3.1 General
      6.3.2 Validation by testing in one volume
      6.3.3 Validation by testing in a second volume
      6.3.4 Elongated enclosures
      6.3.5 Pipes
      6.3.6 Occupied spaces
  6.4 Validation of system design guidelines
      6.4.1 General
      6.4.2 Design nomograph
      6.4.3 Mathematical model for design
  6.5 Special applications
      6.5.1 Suppression combined with venting
      6.5.2 Venting combined with suppression
      6.5.3 Suppression combined with reduced oxygen
            concentrations
      6.5.4 Partial volumes
      6.5.5 Segregated volumes
      6.5.6 Obstructed volumes
  6.6 Test report
7 Safety integrity of explosion suppression systems
  7.1 General
  7.2 Measures to avoid and control systematic faults
  7.3 Control of electric connections
  7.4 Indicators and messages CIE
  7.5 Energy supply
8 Instructions for installation, commissioning and maintenance
  8.1 General
  8.2 Installation of cables
  8.3 Assembling
      8.3.1 General
      8.3.2 Assembly
  8.4 Commissioning
      8.4.1 General
      8.4.2 Commissioning phase
      8.4.3 Instruction
      8.4.4 Commissioning report
      8.4.5 Safety
  8.5 Maintenance
      8.5.1 General
      8.5.2 Servicing
9 Marking and packaging
  9.1 General
  9.2 Explosion suppression system components
  9.3 Explosion suppression system
  9.4 Omission of markings
Annex A (informative) Development of nomograph type design
        guidelines
      A.1 General
      A.2 Design nomograph
Annex ZA (informative) Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 94/9/EC of 23 March 1994
Bibliography

This European Standard describes the basic requirements for the design and application of explosion suppression systems. This European Standard also specifies a method for evaluating the effectiveness and the scale up of explosion suppression systems against defined explosions. It gives the criteria for alternative test apparatus used to undertake explosion suppression efficacy tests and criteria to be applied in defining the safe operating regime of an explosion suppression system.It covers:general requirements for explosion suppression components;evaluating the effectiveness of an explosion suppression system;evaluating the scale up of an explosion suppression system;evaluation and development of design tools for explosion suppression systems;instructions for installation of an explosion suppression system;maintenance instructions for an explosion suppression system.This European Standard is applicable only to explosion suppression systems intended for the protection of closed, or essentially closed, enclosures in which an explosion may result as a consequence of ignition of an explosible mixtures, e.g. dust-air mixtures, gas(vapour)-air mixtures, dust-gas(vapour)-air mixtures and mists.This European Standard is not applicable for explosions of materials listed below, or for mixtures containing some of those materials:unstable materials that are liable to dissociate;explosive materials;pyrotechnic materials;pyrophoric materials.NOTEFor the listed materials expert advice is required.