EN 17077:2018

Determination of burning behaviour of dust layers

This European Standard describes a test method for the determination of the burning behaviour of dust layers under defined initial conditions of air flow, temperature and ignition.
A test result of burning class 1 with the described method does not mean that a dust cannot be ignited when dispersed in a cloud.
This method is not suitable for use with recognized explosives, like gunpowder and dynamite, explosives which do not require atmospheric oxygen for combustion, pyrophoric substances, or substances or mixtures of substances which may under some circumstances behave in a similar manner. Expert advice should be called in, when any doubt exists about the existence of hazard due to explosive properties.

Bestimmung des Brandverhaltens von Staubschichten

Diese Europäische Norm beschreibt ein Prüfverfahren zur Bestimmung des Brennverhaltens von Staubschichten unter definierten Ausgangsbedingungen bezüglich des Luftstroms, der Temperatur und der Entzündung.
Wenn anhand des beschriebenen Verfahrens die Brennzahl 1 festgestellt wird, bedeutet dies nicht, dass der in Luft aufgewirbelte Staub nicht trotzdem entzündet werden kann.
Dieses Verfahren ist nicht für ausgewiesene Explosivstoffe wie Schwarzpulver und Dynamit, für Explosivstoffe, die keinen Sauerstoff zur Verbrennung benötigen, für pyrophore Substanzen oder für Substanzen bzw. Substanzgemische geeignet, die sich unter bestimmten Umständen ähnlich verhalten können. Bei jeglichen Zweifeln bezüglich der Gefährdung durch explosive Eigenschaften sollte fachmännischer Rat eingeholt werden.

Détermination du comportement lors de la combustion des couches de poussières

La présente Norme européenne décrit une méthode d’essai pour la détermination du comportement lors de la combustion des couches de poussières dans des conditions initiales définies de débit d’air, de température et d’inflammation.
Un résultat d’essai correspondant à la « classe de combustion 1 » obtenu avec la méthode décrite ne signifie pas qu’un type de poussières ne peut pas s’enflammer lorsqu’il est dispersé en nuage.
Cette méthode ne convient pas aux explosifs reconnus (comme la poudre à canon et la dynamite), aux explosifs dont la combustion peut s’effectuer sans oxygène de l'atmosphère, aux substances pyrophoriques, ni aux substances ou mélanges de substances qui peuvent se comporter de façon similaire dans certaines conditions. Il convient de demander l’avis d’un expert en cas de doute sur l’existence d’un danger lié aux propriétés explosives.

Ugotavljanje obnašanja pri gorenju prahu v plasteh

Ta evropski standard opisuje preskusno metodo za ugotavljanje obnašanja plasti prahu pri gorenju pod določenimi začetnimi pogoji glede pretoka zraka, temperature in vžiga.
Testni rezultat »razred gorljivosti 1« pri opisani metodi ne pomeni, da ne prah ne more vžgati, če je razpršen v oblak.
Ta metoda ni primerna za uporabo z znanimi eksplozivi, kot sta smodnik in dinamit, z eksplozivnimi materiali, ki za zgorevanje ne potrebujejo kisika, s pirofornimi snovmi oziroma s snovmi ali mešanicami snovmi, ki lahko v nekaterih okoliščinah delujejo na podoben način. V primeru kakršnega koli dvoma o obstoji nevarnosti zaradi eksplozivnih lastnosti se je treba posvetovati s strokovnjakom.

General Information

• Status: Published
• Publication Date: 15-May-2018
• Withdrawal Date: 29-Nov-2018
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• Technical Committee: CEN/TC 305 - Potentially explosive atmospheres - Explosion prevention and protection
• Drafting Committee: CEN/TC 305/WG 1 - Test methods for determining the flammability characteristics of substances (provisional title)
• Directive: 2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Directive: 94/9/EC - 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
• Mandate: M/BC/CEN/92/46 - Standardization mandate assigned to CEN/CENELEC concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Ref Project: SIST EN 17077:2018 - Determination of burning behaviour of dust layers

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ugotavljanje obnašanja pri gorenju prahu v plastehBrandverhalten von Staubschichten durch Klassifizierung in BrennklassenDétermination du comportement lors de la combustion des couches de poussièresDetermination of burning behaviour of dust layers13.220.40Sposobnost vžiga in obnašanje materialov in proizvodov pri gorenjuIgnitability and burning behaviour of materials and productsICS:Ta slovenski standard je istoveten z:EN 17077:2018SIST EN 17077:2018en,fr,de01-julij-2018SIST EN 17077:2018SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 17077
May
t r s z ICS
s uä t t rä v r English Version
Determination of burning behaviour of dust layers Détermination du comportement lors de la combustion des couches de poussières
Bestimmung des Brandverhaltens von StaubschichtenThis European Standard was approved by CEN on
{ March
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
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Rue de la Science 23,
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t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s y r y yã t r s z ESIST EN 17077:2018

Tests at elevated initial temperatures . 14 A.1 Additional equipment. 14 A.2 Additional information in the test-report . 14 Annex B (informative)
Alternative test apparatus . 15 B.1 Principles . 15 B.2 Evaluation of results . 16 Annex C (informative)
Example materials demonstrating behaviour typical of each of the burning classes . 17 Annex ZA (informative)
Relationship between this European Standard and the essential requirements of Directive 2014/34/EU aimed to be covered . 18 Bibliography . 19
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp 3.1 air flow velocity volume of air [m3] which flows through a defined surface [m2] per unit time [s] 3.2 combustion exothermic reaction with either flames, glowing or smouldering when ignited Note to entry: For the purpose of this standard “combustion” includes decomposition 3.3 ignition initiation of combustion 3.4 initial temperature temperature of the dust train at the moment of ignition SIST EN 17077:2018
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