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EN 14994:2007

Current
Current

The latest, up-to-date edition.

Gas explosion venting protective systems
Published date

02-14-2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Venting of enclosures
5 Venting of isolated compact enclosures
  5.1 General
  5.2 Venting of isolated compact enclosures
  5.3 Situations outside the constraints of the basic
       method (turbulence inducing elements, partially
       filled enclosures)
       5.3.1 General
       5.3.2 Elevated initial pressure
       5.3.3 Effect of initial turbulence
       5.3.4 Effect of partial filling
       5.3.5 Venting of enclosures containing turbulence
             inducing elements
  5.4 Elongated enclosures
       5.4.1 General
       5.4.2 Venting of elongated enclosures vented at
             each end
       5.4.3 Venting of elongated enclosures vented along
             the enclosure
  5.5 Pipes
  5.6 Interconnected enclosures
  5.7 Vent ducts
6 Supplementary design aspects
  6.1 General
  6.2 Positioning and shape of explosion vents
  6.3 Choice of venting device
  6.4 External effects
       6.4.1 General
       6.4.2 Flame effects
       6.4.3 Pressure effects
       6.4.4 Deflectors
  6.5 Recoil forces
7 Information for use
  7.1 Marking
  7.2 Accompanying documents
Annex A (informative) Assessment of the level of
        congestion in rooms containing turbulence
        including elements
Annex ZA (informative) Relationship between this
         European Standard and the Essential Requirements
         of EU Directive 94/9/EC
Bibliography

This European Standard specifies the basic design requirements for the selection of a gas explosion venting protective system. This European Standard, EN 14797 and EN 14460 form a series of three standards which are used together.NOTE 1These three standards together represent the concept of gas explosion venting.NOTE 2To avoid transfer of explosions to other communicating equipment one should also consider applying prEN 15089.This European Standard is applicable to:vent sizing to protect against the internal pressure effects of a gas explosion;flame and pressure effects outside the enclosure;recoil forces;influence of vent ducts;influence of initial temperature and pressure.This European Standard does not provide design and application rules against effects generated by detonation reactions or runaway exothermic reactions including decomposition in the gas phase.This European Standard is not applicable to:fire risks arising either from materials processed, used or released by the equipment or from materials that make up equipment and buildings;design, construction and testing of explosion venting devices, which are used to achieve explosion venting );protection against overpressures caused by events such as overfilling, overpressurisation, fire engulfment, overheating etc.NOTE 3Protection by venting against dust and hybrid explosions is specified in EN 14491.

Committee
CEN/TC 305
DevelopmentNote
To be read in conjunction with EN 14797 and EN 14460. (04/2007)
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

Standards Relationship
DIN EN 14994:2007-05 Identical
NBN EN 14994 : 2007 Identical
I.S. EN 14994:2007 Identical
BS EN 14994:2007 Identical
DIN EN 14994 E : 2007 Identical
UNE-EN 14994:2007 Identical
PN EN 14994 : 2009 Identical
NS EN 14994 : 1ED 2007 Identical
NF EN 14994 : 2007 Identical
SN EN 14994 : 2007 Identical
UNI EN 14994 : 2007 Identical
NEN EN 14994 : 2007 Identical

BS EN 15089:2009 Explosion isolation systems
12/30258755 DC : 0 BS EN 1539 - DRYERS AND OVENS, IN WHICH FLAMMABLE SUBSTANCES ARE RELEASED - SAFETY REQUIREMENTS
09/30198043 DC : 0 BS EN 1127-1 - EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 1: BASIC CONCEPTS AND METHODOLOGY
16/30348296 DC : DRAFT DEC 2016 BS EN 14460 - EXPLOSION RESISTANT EQUIPMENT
08/30173506 DC : DRAFT JAN 2008 BS EN 1539 - DRYERS AND OVENS, IN WHICH FLAMMABLE SUBSTANCES ARE RELEASED - SAFETY REQUIREMENTS
I.S. EN 16009:2011 FLAMELESS EXPLOSION VENTING DEVICES
UNE-EN 15089:2010 Explosion isolation systems
I.S. EN 15089:2009 EXPLOSION ISOLATION SYSTEMS
UNI EN 16009 : 2011 FLAMELESS EXPLOSION VENTING DEVICES
PREN 1539 : DRAFT 2012 DRYERS AND OVENS, IN WHICH FLAMMABLE SUBSTANCES ARE RELEASED - SAFETY REQUIREMENTS
DIN EN 15233:2007-11 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres
BS EN 15233:2007 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres
DIN EN 1539:2016-02 DRYERS AND OVENS, IN WHICH FLAMMABLE SUBSTANCES ARE RELEASED - SAFETY REQUIREMENTS
I.S. EN 1539:2015 DRYERS AND OVENS, IN WHICH FLAMMABLE SUBSTANCES ARE RELEASED - SAFETY REQUIREMENTS
VDI 2263 Blatt 7:2010-07 Dust fires and dust explosions - Hazards - assessment - protective measures - Dust fires and explosion protection in spraying and drying integrated equipment
VDI 2262 Blatt 1:2013-06 Workplace air - Reduction of exposure to air pollutants - Legal principles, terms and definitions, basic organisational measures for industrial safety and environmental protection
VDI 2263 Blatt 6:2017-08 Dust fires and dust explosions - Hazards - assessment - protective measures - Dust fires and explosion protection in dust extracting installations
09/30209992 DC : 0 BS EN 16020 - EXPLOSION DIVERTERS
DIN EN 15089:2009-07 EXPLOSION ISOLATION SYSTEMS
UNI EN 15089 : 2009 EXPLOSION ISOLATION SYSTEMS
DIN EN 15233 E : 2007 METHODOLOGY FOR FUNCTIONAL SAFETY ASSESSMENT OF PROTECTIVE SYSTEMS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES
ONORM EN 14373 : 2006 EXPLOSION SUPPRESSION SYSTEMS
09/30208493 DC : 0 BS EN 16009 - FLAMELESS EXPLOSION VENTING DEVICES (TYPE C STANDARD)
DIN EN 15089 E : 2009 EXPLOSION ISOLATION SYSTEMS
I.S. EN 14460:2018 EXPLOSION RESISTANT EQUIPMENT
EN 14460:2018 Explosion resistant equipment
UNE-EN 1539:2010 Dryers and ovens, in which flammable substances are released - Safety requirements
BS EN 1539:2015 Dryers and ovens, in which flammable substances are released. Safety requirements
EN 16009:2011 Flameless explosion venting devices
EN 1539:2015 Dryers and ovens, in which flammable substances are released - Safety requirements
EN 15089:2009 Explosion isolation systems
EN 15233:2007 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres
BS EN 16009:2011 Flameless explosion venting devices
DIN EN 16009:2011-10 Flameless explosion venting devices

EN 1127-1:2011 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
EN 14373:2005 Explosion suppression systems
EN 14797:2006 Explosion venting devices
EN 13673-2:2005 Determination of maximum explosion pressure and the maximum rate of pressure rise of gases and vapours - Part 2: Determination of the maximum rate of explosion pressure rise
EN 13237:2012 Potentially explosive atmospheres - Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres
EN 14491:2012 Dust explosion venting protective systems
NFPA 68 : 2013 EXPLOSION PROTECTION BY DEFLAGRATION VENTING
EN 13673-1:2003 Determination of the maximum explosion pressure and the maximum rate of pressure rise of gases and vapours - Part 1: Determination of the maximum explosion pressure
1994/9/EC : 1994 DIRECTIVE 94/9/EC OF THE EUROPEAN PARLIAMENT AND THE COUNCIL OF 23 MARCH 1994 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES CONCERNING EQUIPMENT AND PROTECTIVE SYSTEMS INTENDED FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES

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