SIST EN 12882:2015
(Main)Conveyor belts for general purpose use - Electrical and flammability safety requirements
Conveyor belts for general purpose use - Electrical and flammability safety requirements
This European Standard specifies electrical and flammability safety requirements for general purposeconveyor belts not intended for use in underground installations and a means of categorizing conveyor belts interms of the level of safety sought in their end use application. This European Standard does not provide
electrical safety requirements for volume resistance which may be measured by the methods in
EN ISO 21178 and which is relevant to some types of light conveyor belts.
This European Standard is not applicable to conveyor belts which are manufactured before the date of
publication of this document by CEN.
NOTE 1 Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive
atmospheres can be applicable to the type of machine or equipment covered by this European Standard. The present
standard is not intended to provide means of complying with the essential health and safety requirements of
Directive 94/9/EC, this being covered in EN 14973.
NOTE 2 EN 12882 is not a product standard but is intended to help users of conveyor belts to select the required
electrical and flammability safety properties needed following a suitable risk assessment. No requirements are, therefore,
included for marking, information to be supplied, etc., these matters being covered in relevant product standards such
as EN ISO 14890 and EN ISO 15236-1.
Fördergurte für allgemeine Anwendung - Elektrische und brandtechnische Sicherheitsanforderungen
Diese Europäische Norm legt elektrische und brandtechnische Anforderungen an Fördergurte für allgemeine Anwendung fest, die nicht für den Einsatz unter Tage vorgesehen sind, sowie die Klassifizierung von Fördergurten hinsichtlich des für den Verwendungszweck angestrebten Sicherheitsgrads. In dieser Europäischen Norm sind keine Sicherheitsanforderungen an den elektrischen Durchgangswiderstand festgelegt, der mit den in EN ISO 21178 genannten Verfahren gemessen werden kann und der für einige Typen leichter Fördergurte von Bedeutung ist.
Diese Europäische Norm gilt nicht für Fördergurte, die vor dem Datum der Veröffentlichung dieses Dokuments durch CEN hergestellt wurden.
ANMERKUNG 1 Richtlinie 94/9/EG, die Einrichtungen und Schutzsysteme für den Einsatz in potentiell explosiven Atmosphären betrifft, kann für den Maschinentyp oder Einrichtungen zutreffen, die durch diese Europäische Norm abgedeckt sind. Die vorliegende Norm ist nicht zur Erfüllung der wesentlichen Gesundheits- und Sicherheitsanforderungen der Richtlinie 94/9/EG vorgesehen, die durch EN 14973 abgedeckt ist.
ANMERKUNG 2 EN 12882 ist keine Produktnorm, sondern dazu gedacht, den Anwendern von Fördergurten bei der Auswahl der erforderlichen elektrischen und brandtechnischen sicherheitsrelevanten Eigenschaften zu helfen, die aufgrund einer angemessenen Risikobeurteilung notwendig sind. Deshalb sind keine Anforderungen an Kennzeichnung, bereitzustellende Angaben usw. enthalten, da diese Themen durch die entsprechenden Produktnormen wie beispielsweise EN ISO 14890 und EN ISO 15236-1 abgedeckt sind.
Courroies transporteuses à usage général - Prescriptions de sécurité électrique et protection contre l'inflammabilité
La présente Norme européenne spécifie les prescriptions de sécurité électrique et les prescriptions en matière de protection contre l’inflammabilité relatives aux courroies transporteuses à usage général qui ne sont pas destinées à être utilisées dans des installations souterraines, ainsi qu’une méthode de classement des courroies transporteuses en termes de niveau de sécurité recherché lors de l’application finale. La présente Norme européenne ne fournit pas d’prescriptions de sécurité électrique pour la résistance transversale qui peut être mesurée selon les méthodes de l’EN ISO 21178 et qui est pertinente pour certains types de courroies transporteuses légères.
La présente Norme européenne ne s’applique pas aux courroies transporteuses fabriquées avant la date de publication du présent document par le CEN.
NOTE 1 La Directive 94/9/CE concernant les appareils et les systèmes de protection destinés à être utilisés en atmosphères potentiellement explosibles peut être applicable au type de machine ou d’appareil couvert par la présente Norme européenne. La présente norme n’est pas destinée à fournir un moyen de se conformer aux exigences essentielles en matière de santé et de sécurité de la Directive 94/9/CE, cet aspect étant traité dans l’EN 14973.
NOTE 2 L’EN 12882 n'est pas une norme de produit mais est prévue pour aider les utilisateurs de courroies transporteuses à choisir les propriétés de sécurité électrique et d'inflammabilité requises après une évaluation appropriée des risques. Aucune prescription n'est donc incluse pour le marquage, l'information à fournir, etc., ces sujets étant couverts par les normes de produit pertinentes telles que l’EN ISO 14890 et l’EN ISO 15236-1.
Naprave za kontinuirni transport - Trakovi tračnih transporterjev za splošne namene - Električne in požarnovarnostne zahteve
Ta evropski standard določa električne in požarnovarnostne zahteve za trakove tračnih transporterjev za splošne namene, ki niso namenjeni za uporabo v napravah pod zemljo, ter načine za razvrstitev trakov tračnih transporterjev glede na stopnjo varnosti, ki je zahtevana za končno uporabo. Ta evropski standard ne določa električnih varnostnih zahtev za volumsko upornost, ki jo je mogoče izmeriti z metodami iz
EN ISO 21178 in ki je relevantna za nekatere vrste lahkih trakov tračnih transporterjev.
Ta evropski standard se ne uporablja za trakove tračnih transporterjev, ki so bili izdelani, preden je
Evropski odbor za standardizacijo (CEN) objavil ta dokument.
OPOMBA 1: Direktiva 94/9/ES v zvezi z opremo in zaščitnimi sistemi, namenjenimi za uporabo v potencialno eksplozivnih atmosferah, se lahko uporablja za vrsto strojev ali opreme, ki jo zajema ta evropski standard. Ta standard ni namenjen zagotavljanju načinov za dokazovanje skladnosti z bistvenimi zdravstvenimi in varnostnimi zahtevami Direktive 94/9/ES, saj je to zajeto v standardu EN 14973.
OPOMBA 2: EN 12882 ni standard za proizvode, ampak je namenjen kot pomoč uporabnikom trakov tračnih transporterjev, da lahko izberejo obvezno potrebne električne in požarnovarnostne zahteve po primerni oceni tveganja. Standard torej ne vključuje zahtev glede označevanja, podatkov, ki jih je treba zagotoviti, itd., saj to zajemajo ustrezni standardi za proizvode, kot sta EN ISO 14890 in EN ISO 15236-1.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fördergurte für allgemeine Anwendung - Elektrische und brandtechnische SicherheitsanforderungenCourroies transporteuses à usage général - Prescriptions de sécurité électrique et protection contre l'inflammabilitéConveyor belts for general purpose use - Electrical and flammability safety requirements53.040.20Deli za transporterjeComponents for conveyors13.220.40Sposobnost vžiga in obnašanje materialov in proizvodov pri gorenjuIgnitability and burning behaviour of materials and productsICS:Ta slovenski standard je istoveten z:EN 12882:2015SIST EN 12882:2015en,fr,de01-oktober-2015SIST EN 12882:2015SLOVENSKI
STANDARDSIST EN 12882:20081DGRPHãþD
SIST EN 12882:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12882
August 2015 ICS 53.040.20 Supersedes EN 12882:2008English Version
Conveyor belts for general purpose use - Electrical and flammability safety requirements
Courroies transporteuses à usage général - Prescriptions de sécurité électrique et protection contre l'inflammabilité
Fördergurte für allgemeine Anwendung - Elektrische und brandtechnische Sicherheitsanforderungen This European Standard was approved by CEN on 27 June 2015.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12882:2015 ESIST EN 12882:2015
EN 12882:2015 (E) 2 Contents Page European foreword .3 Introduction .4 1 Scope .5 2 Normative references .5 3 Terms and definitions .5 4 Safety requirements .6 4.1 General .6 4.2 Electrical conductivity .6 4.3 Flame retardation .6 4.4 Fire simulation .7 4.5 Drum friction .7 5 Safety categories .7 5.1 Category 1 .7 5.2 Category 2A .7 5.3 Category 2B .7 5.4 Category 3A .8 5.5 Category 3B .8 5.6 Category 4A .8 5.7 Category 4B .8 5.8 Category 5A .8 5.9 Category 5B .9 5.10 Category 5C .9 Annex A (informative)
Suggested belt approval / certification options . 12 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EC Directive 2006/42/EC . 13 Bibliography . 14
SIST EN 12882:2015
EN 12882:2015 (E) 3 European foreword This document (EN 12882:2015) has been prepared by Technical Committee CEN/TC 188 “Conveyor belts”, the secretariat of which is held by SNV. This document supersedes EN 12882:2008. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2016, and conflicting national standards shall be withdrawn at the latest by February 2016. The main changes with respect to the previous edition are listed below: — electrical conductivity test requirements for light conveyor belts have been removed from all categories except 1, 2A and 2B; — the requirement for flame retardation testing has been added to category 4A, 4B, 5A, 5B and 5C; — alternative fire simulation tests have been added to category 4A, 4B, 5A, 5B and 5C. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12882:2015
EN 12882:2015 (E) 4 Introduction This document is a type C standard as stated in EN ISO 12100. The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this document. When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of the other standards, for machines that have been designed and built according to the provisions of this type C standard. During the preparation of this European Standard, the hazards which have been identified as being directly related to the use of conveyor belts are: a) hazards associated with the discharge of static electrical energy; b) hazards associated with the impingement of small naked flames on the cover and/or carcass of a conveyor belt at rest; c) hazards caused by the stalling of a conveyor belt and the continued operation of the driving mechanism causing localized heating of the conveyor belt through contact with the driving drum or cylinder or some other source of frictional heat; d) hazards caused by the propagation of a flame along a belt which has been exposed to a relatively high energy source such as a fire. The risk, or probable rate of occurrence of these hazards and the degree of harm they can cause will vary depending upon the particular circumstances of the application or site of application, which are many and varied. Consequently, the level of safety required will vary from one application to another, depending upon the risks judged to be pertinent. The hazards listed above should not be taken as the only properties affecting safety in operation. Other aspects such as health or environmental requirements should be considered. Depending on the individual end use requirement, these other factors can affect the category of belt selected and additional safety precautions may need to be employed. This European Standard is therefore designed to enable the user to select the category of conveyor belt most suited to the particular circumstances of the application. SIST EN 12882:2015
EN 12882:2015 (E) 5 1 Scope This European Standard specifies electrical and flammability safety requirements for general purpose conveyor belts not intended for use in underground installations and a means of categorizing conveyor belts in terms of the level of safety sought in their end use application. This European Standard does not provide electrical safety requirements for volume resistance which may be measured by the methods in EN ISO 21178 and which is relevant to some types of light conveyor belts. This European Standard is not applicable to conveyor belts which are manufactured before the date of publication of this document by CEN. NOTE 1 Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive atmospheres can be applicable to the type of machine or equipment covered by this European Standard. The present standard is not intended to provide means of complying with the essential health and safety requirements of Directive 94/9/EC, this being covered in EN 14973. NOTE 2 EN 12882 is not a product standard but is intended to help users of conveyor belts to select the required electrical and flammability safety properties needed following a suitable risk assessment. No requirements are, therefore, included for marking, information to be supplied, etc., these matters being covered in relevant product standards such as EN ISO 14890 and EN ISO 15236-1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1554:2012, Conveyor belts - Drum friction testing EN 12881-1:2014, Conveyor belts - Fire simulation flammability testing - Part 1: Propane burner tests EN ISO 284, Conveyor belts - Electrical conductivity - Specification and test method (ISO 284) EN ISO 340, Conveyor belts - Laboratory scale flammability characteristics - Requirements and test method (ISO 340) EN ISO 21178, Light conveyor belts - Determination of electrical resistances (ISO 21178) EN ISO 21179, Light conveyor belts - Determination of the electrostatic field generated by a running light conveyor belt (ISO 21179) EN ISO 21183-1, Light conveyor belts - Part 1: Principal characteristics and applications (ISO 21183-1) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 afterflame flame which persists after the ignition source has been removed 3.2 afterglow persistence of glowing, after cessation of flaming or, if no flaming occurs, after the ignition source has been removed SIST EN 12882:2015
EN 12882:2015 (E) 6 3.3 flame, noun zone of combustion in the gaseous phase usually with emission of light 3.4 flame, verb to undergo combustion in the gaseous phase with emission of light 3.5 glowing made luminous by heat, (without flame) 3.6 undamaged part remaining of a conveyor belt after the termination of the propane gallery fire test described in accordance with EN 12881-1 and which shows no evidence of embrittlement, cracking, blistering or other blemishes not originally present 4 Safety requirements 4.1 General Conveyor belts within each category (1, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B and 5C) shall meet the test requirements as indicated in Table 1 and in the specific subclauses below. 4.2 Electrical conductivity 4.2.1 When tested in accordance with EN ISO 284, all general purpose conveyor belts shall have an
4.2.2 Light conveyor belts as described in EN ISO 21183-1 shall have an electrical surface resistance not EN ISO 21178 unless the conditions described in 4.2.3 are met. 4.2.3 Light conveyor belts with an internal conductive layer shall not generate an electrostatic charge resulting in a surface potential of more than 1 000 V when test
...
SLOVENSKI STANDARD
oSIST prEN 12882:2014
01-januar-2014
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Conveyor belts for general purpose use - Electrical and flammability safety requirements
Fördergurte für allgemeine Anwendung - Elektrische und brandtechnische
Sicherheitsanforderungen
Courroies transporteuses à usage général - Prescriptions de sécurité électrique et
protection contre l'inflammabilité
Ta slovenski standard je istoveten z: prEN 12882
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
53.040.20 Deli za transporterje Components for conveyors
oSIST prEN 12882:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12882:2014
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oSIST prEN 12882:2014
EUROPEAN STANDARD
DRAFT
prEN 12882
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2013
ICS 53.040.20 Will supersede EN 12882:2008
English Version
Conveyor belts for general purpose use - Electrical and
flammability safety requirements
Courroies transporteuses à usage général - Prescriptions Fördergurte für allgemeine Anwendung - Elektrische und
de sécurité électrique et protection contre l'inflammabilité brandtechnische Sicherheitsanforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 188.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12882:2013: E
worldwide for CEN national Members.
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oSIST prEN 12882:2014
prEN 12882:2013 (E)
Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 Safety requirements .6
5 Safety categories .7
Annex A (informative) Suggested belt approval / certification options . 11
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EC Directive 2006/42/EC . 12
Bibliography . 13
2
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oSIST prEN 12882:2014
prEN 12882:2013 (E)
Foreword
This document (prEN 12882:2013) has been prepared by Technical Committee CEN/TC 188 “Conveyor
belts”, the secretariat of which is held by SNV.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12881:2008.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this document.
The main changes with respect to the previous edition are listed below:
• Electrical conductivity test requirements for light conveyor belts have been removed from all
categories
• The requirement for flame retardation testing has been added to category 4A, 4B, 5A, 5B and 5C
• Alternative fire simulation tests have been added to category 4A, 4B, 5A, 5B and 5C
3
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oSIST prEN 12882:2014
prEN 12882:2013 (E)
Introduction
This document is a type C standard as stated in EN ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and events are covered are
indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B standards, the
provisions of this type C standard take precedence over the provisions of the other standards, for machines
that have been designed and built according to the provisions of this type C standard.
During the preparation of this European Standard, the hazards which have been identified as being directly
related to the use of conveyor belts are:
a) hazards associated with the discharge of static electrical energy;
b) hazards associated with the impingement of small naked flames on the cover and/or carcass of a
conveyor belt at rest;
c) hazards caused by the stalling of a conveyor belt and the continued operation of the driving mechanism
causing localized heating of the conveyor belt through contact with the driving drum or cylinder or some
other source of frictional heat;
d) hazards caused by the propagation of a flame along a belt which has been exposed to a relatively high
energy source such as a fire.
The risk, or probable rate of occurrence of these hazards and the degree of harm they can cause will vary
depending upon the particular circumstances of the application or site of application, which are many and
varied. Consequently the level of safety required will vary from one application to another, depending upon the
risks judged to be pertinent. The hazards listed above should not be taken as the only properties affecting
safety in operation. Other aspects such as health or environmental requirements should be considered.
Depending on the individual end use requirement, these other factors can affect the category of belt selected
and additional safety precautions may need to be employed.
This European Standard is therefore designed to enable the user to select the category of conveyor belt most
suited to the particular circumstances of the application.
4
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oSIST prEN 12882:2014
prEN 12882:2013 (E)
1 Scope
This European Standard specifies electrical and flammability safety requirements for general purpose
conveyor belts not intended for use in underground installations and a means of categorizing conveyor belts in
terms of the level of safety sought in their end use application. This European Standard does not provide
electrical safety requirements for volume resistance which may be measured by the methods in
EN ISO 21178 and which is relevant to some types of light conveyor belts.
This European Standard is not applicable to conveyor belts which are manufactured before the date of
publication of this document by CEN.
NOTE 1 Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive
atmospheres can be applicable to the type of machine or equipment covered by this European Standard. The present
standard is not intended to provide means of complying with the essential health and safety requirements of Directive
94/9/EC, this being covered in EN 14973.
NOTE 2 EN 12882 is not a product standard but is intended to help users of conveyor belts to select the required
electrical and flammability safety properties needed following a suitable risk assessment. No requirements are, therefore,
included for marking, information to be supplied, etc., these matters being covered in relevant product standards such
as EN ISO 14890 and EN ISO 15236-1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 619, Continuous handling equipment and systems – Safety and EMC requirements for equipment for
mechanical handling of unit loads
EN 620, Continuous handling equipment and systems – Safety and EMC requirements for fixed belt
conveyors for bulk materials
EN 1554, Conveyor belts – Drum friction testing
EN 12881-1, Conveyor belts – Fire simulation flammability testing – Part 1: Propane burner tests
EN ISO 284, Conveyor belts – Electrical conductivity – Specification and test method (ISO 284)
EN ISO 340, Conveyor belts – Laboratory scale flammability characteristics – Requirements and test method
(ISO 340)
EN ISO 12100, Safety of machinery – Basic concepts, general principles for design – Part 2: Technical
principles (ISO 12100)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
afterflame
flame which persists after the ignition source has been removed
5
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oSIST prEN 12882:2014
prEN 12882:2013 (E)
3.2
afterglow
persistence of glowing, after cessation of flaming or, if no flaming occurs, after the ignition source has been
removed
3.3
flame, noun
zone of combustion in the gaseous phase usually with emission of light
3.4
flame, verb
to undergo combustion in the gaseous phase with emission of light
3.5
glowing
made luminous by heat, (without flame)
3.6
undamaged
part remaining of a conveyor belt after the termination of the propane gallery fire test described in accordance
with EN 12881-1 and which shows no evidence of embrittlement, cracking, blistering or other blemishes not
originally present
4 Safety requirements
4.1 Electrical conductivity
4.1.1 When tested in accordance with EN ISO 284, all general purpose conveyor belts shall have an
electrical surface resistance not greater than 300 MΩ.
4.2 Flame retardation
4.2.1 Conveyor belts in category 2A, or3A, (see Clause 5 and Table 1), when tested in accordance with
EN ISO 340 with covers intact, shall have an aggregate of the times for duration of afterflame for all six tests
of less than 45 s and no individual result shall be greater than 15 s.
4.2.2 Conveyor belts in category 2B, 3B, 4A, 4B, 5A, 5B and 5C (see Clause 5 and Table 1), when tested in
accordance with EN ISO 340 with covers intact and also with covers removed, shall have an aggregate of the
times for duration of afterflame for each group of six tests, (i.e. six tests with covers intact and six tests with
covers removed) of less than 45 s and no individual result shall be greater than 15 s.
4.3 Fire simulation
Conveyor belts in categories 4A and 4B, 5A, 5B and 5C (see Clause 5 and Table 1), when tested in
accordance with Method A of EN
...
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