SIST EN 26184-3:1996
(Main)Explosion protection systems - Part 3 : Determination of explosion indices of fuel/air mixtures other than dust/air and gas/air mixtures (ISO 6184-3:1985)
Explosion protection systems - Part 3 : Determination of explosion indices of fuel/air mixtures other than dust/air and gas/air mixtures (ISO 6184-3:1985)
Per BT C012/2006 transfer of responsibility from CEN/TC 191 to CEN/TC 305.
Explosions-Schutzsysteme - Teil 3 : Bestimmung der Explosionskenngrößen von Brennstoffen in Luft außer Staub/Luft- und Gas/Luft-Gemischen (ISO 6184-3:1985)
Systemes de protection contre les explosions - Partie 3 : Détermination des indices d'explosion des mélanges de combustibles et d'air autres que les mélanges air/poussiere et air/gaz (ISO 6184-3:1985)
Sistemi za zaščito pred eksplozijo - 3. del: Ugotavljanje eksplozijskih karakteristik zmesi gorivo/zrak, drugačnih od zmesi prah/zrak in plin/zrak
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Explosions-Schutzsysteme - Teil 3 : Bestimmung der Explosionskenngrößen von Brennstoffen in Luft außer Staub/Luft- und Gas/Luft-Gemischen (ISO 6184-3:1985)Systemes de protection contre les explosions - Partie 3 : Détermination des indices d'explosion des mélanges de combustibles et d'air autres que les mélanges air/poussiere et air/gaz (ISO 6184-3:1985)Explosion protection systems - Part 3 : Determination of explosion indices of fuel/air mixtures other than dust/air and gas/air mixtures (ISO 6184-3:1985)13.230Varstvo pred eksplozijoExplosion protectionICS:Ta slovenski standard je istoveten z:EN 26184-3:1991SIST EN 26184-3:1996en01-maj-1996SIST EN 26184-3:1996SLOVENSKI
STANDARD
SIST EN 26184-3:1996
SIST EN 26184-3:1996
SIST EN 26184-3:1996
GIi - P eh 8 G; 0 s!? International Standard 618413 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEX~YHAPO~tiAR OPTAHM3ALlMR fl0 CTAH~APTl’l3AlJblM.ORGANISATlON INTERNATIONALE DE NORMALISATlON Explosion protection Systems - Part 3: Determination of explosion indices of fuel/air mixtures other than dust/air and gas/air mixtures S yst&mes de pro tection con tre les explosions - Partie 3: Determination des indices d’explosion des mklanges de combustibles et d’air autres gue les mhlanges air/poussi&re et air/gaz First edition - 1985-11-15 UD@ 614.635 Descriptors : explosion proofing, dust, air, gas mixtures, tests, explosion index. Ref. No. ISO 6184/3-1985 (EI Price based on 4 pages SIST EN 26184-3:1996
Forewor ISO (the International Qrganization for Standardization) is a worldwide federation of national Standards bodies (ISO member bodies). The work sf preparing International Standards is normally carried out through ISQ technical committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 6iW3 was prepared by Technical Committee ISO/TC 21, Equipmen t for fire pro tection and fire figh ting. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. 0 International Organkation fsa Standardiration, 1985 Printed in Switzerland SIST EN 26184-3:1996
INTERNATIONAL STANDARD ISO 6184/3-1985 (EI Explosion protection Systems - Part 3: Determination of explosion indices of fuel/air mixtures other than dust/air and gas/air mixtures 0 Introduction 0.1 The assessment of measures required to provide protec- tion against explosion hazards involving fuel/air mixtures requires Prior determination of the potential explosion severity of such mixtures, by the measurement of explosion indices. Conversely, the measurement of the effectiveness and perfor- mance of explosion protection Systems requires that they should be tested against explosions of known severity. The severity of a fuel/air explosion is a function of the follow- ing : a) the physical and Chemical properties of the fuel; b) the concentration of the fuel in the fuel/air mixture; c) the homogeneity and turbulente of the fuel/air mix- ture ; d) the type, energy, and location of the ignition Source; e) the geometry of the Container; f) the temperature, and pressure of the fuel/air mixture. 0.2 This part of ISO 6184 is one of a series dealing with ex- plosion protection Systems. The other Parts are as follows: Part 1 : Determination of explosion indices of combustible dusts in air. Part 2: Determination of explosion indices of combustible gases in air. Part 4 : Determination of efficacy of explosion suppression Systems. 0.3 The interpretation of explosion indices determined by the method specified in this part of ISQ 6184 and their relation to the development of explosions in commonly encountered ex- plosion hazards should be recognized. In particular, the degree of turbulente tan influence the hazard significantly. In practice, the link between a given degree of turbulente and a specific type of hazard is the responsibility of specialists in the fields of explosions and explosion protection. Two extremes of turbulente commonly encountered in in- dustrial plants are : a) quiescent turbulente conditions prevailing in storage vessels ; b) high turbulente conditions prevailing in the region of an extraction fan. lt should be realized that turbulente tan arise in two ways: a) turbulente intrinsic to the plant, under normal operating conditions, as a consequence of perturbations to the air-flow ; b) turbulente induced by obstructions within an instal- lation on a gas which expands as the result of an explosion. 1 Scope This patt of ISO 6184 specifies a method for the determination of the explosion indices of fuels in air lother than dust/air and gas/air mixtures) in an enclosed space. FueVair mixtures may be, for example, gas/air/dust mixtures and vaporized liquid/air mixtures. lt gives the criteria by which results obtained using other test procedures tan be correlated to yield explosion in- dices as determined by the method specified in this part of ISO 6184. 2 Field of application This part of ISO 6184 is applicable only to the determination of explosion indices pertaining to the development of contained fuel/air explosions after ignition of the reactants. lt does not apply to indices pertaining to the conditions necessary to Cause ignition of the reactants. NOTE - Dust and gas/air mixtures, both at concentrations below the explosive range, tan form explosive mixtures when combined. Dust which cannot be caused to explode even with a high energy ignition Source may become explosive if a flammable gas or vapour is added. 1 SIST EN 26184-3:1996
ISO 6184/3-1985 d:Ej 3 Definitions For the purpose of this part of ISO 6184 the following defini- tions apply. 31 explosion: Propagation of a flame in a pre-mixture sf combustible gases, suspended dust(s), combustible vapour(s), mist(s), or mixtures thereof, in a gaseous oxidant such as air, in a closed or substantially closed vessel. 32 expiosiom index : Numerital term, determined in accord- ante with the test methods specified in this part of ISO 6184, which characterizes the contained explosion sf a specified con- centration of reactants in a vessel having a volume sf 1 m3. NOTE - Figure 1 shows the pressure/time curve, expressed in barslj and seconds respectively, of a typical explosion. 3.2.l explosion indexp,: Maximum overpressure relative to the pressure in the vessel at the time of ignition attained during an explosion. 3.2.2 explosion indexp,,,: Vlaximum value of the explosion index prn determi
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