SIST EN 12882:2002
(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 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
1637 and which is relevant to some types of light conveyor belts.
NOTE 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.
Fördergurte für allgemeine Anwendung - Elektrische und brandtechnische Sicherheitsanforderungen
Diese Europäische Norm legt elektrische und brandtechnische Anforderungen an Förder-gurte und die Klassifizierung von Fördergurten hinsichtlich der Sicherheit bei der allgemei-nen An-wen-dung fest und gilt nicht für den Einsatz unter Tage. Diese Europäische Norm gilt nicht für Sicherheitsanforderungen für den elektrischen Durchg-angswiderstand, der mit den in EN 1637 genannten Verfahren gemessen werden kann und der für einige Typen leichter Fördergurte von Bedeutung ist.
ANMERKUNG Richtlinie 94/9/EC, die Ausrüstung und Schutzsysteme für den Einsatz in möglicherweise explosiven Atmosphären betreffen, kann anwendbar sein auf den Maschinentyp oder die Ausrüstung, die durch diese Europäische Norm abgedeckt wird. Es ist nicht beabsichtigt, mit der vorliegenden Norm Mittel zu beschaffen, um die wichtigen Gesundheits- und Sicherheitsanforderungen der Richtlinie 94/9/EU zu erfüllen.
Courroies transporteuses a usage général - Prescriptions de sécurité électrique et protection contre l'inflammabilité
La présente Norme européenne spécifie les exigences de sécurité électrique et les exigences en matiere de protection contre l'inflammabilité relatives aux courroies transporteuses a usage général, qui ne sont pas destinées a etre 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'exigences de sécurité électrique pour la résistance volumique qui peut etre mesurée selon les méthodes de l'EN 1637 et qui concerne certains types de courroies transporteuses légeres.
NOTE La Directive 94/9/CE concernant les appareils et les systemes de protection destinés a etre utilisés en atmospheres potentiellement explosibles peut etre applicable au type de machine ou d'appareil traité dans la présente Norme européenne. La présente norme n'est pas destiné a fournir un moyen de se conformer aux exigences essentielles en ce qui concerne la sécurité et la santé de la Directive 94/9/CE.
Naprave za kontinuirni transport - Trakovi tračnih transporterjev za splošne namene - Električne in požarnovarnostne zahteve
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 12882:2002
01-november-2002
1DSUDYH]DNRQWLQXLUQLWUDQVSRUW7UDNRYLWUDþQLKWUDQVSRUWHUMHY]DVSORãQH
QDPHQH(OHNWULþQHLQSRåDUQRYDUQRVWQH]DKWHYH
Conveyor belts for general purpose use - Electrical and flammability safety requirements
Fördergurte für allgemeine Anwendung - Elektrische und brandtechnische
Sicherheitsanforderungen
Courroies transporteuses a usage général - Prescriptions de sécurité électrique et
protection contre l'inflammabilité
Ta slovenski standard je istoveten z: EN 12882:2001
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
SIST EN 12882:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN 12882
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2001
ICS 13.220.40; 53.040.20
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 European Standard was approved by CEN on 12 November 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12882:2001 E
worldwide for CEN national Members.
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EN 12882:2001 (E)
Contents
page
Foreword 2
Introduction 3
1 Scope 4
2 Normative references 4
3 Terms and definitions 5
4 Requirements for safety 5
5 Safety categories of conveyor belts 7
Annex A (informative) Extract from CENELEC Report R044-OO1 “Safety of
machinery – Guidance and recommendations for the avoidance of
hazards due to static electricity” of February 1999-11-26 13
Annex ZA (informative) Relationship of this document with EC Directives 14
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 188
“Conveyor belts”, the secretariat of which is held by BSI.
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 June 2002, and
conflicting national standards shall be withdrawn at the latest by June 2002.
This European Standard 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 standard.
According to the CEN/CENELEC Internal Regulations, the national standards
organizations of the following countries are bound to implement this European
Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany,
Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
Annex A is informative.
2
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EN 12882:2001 (E)
Introduction
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.
3
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EN 12882:2001 (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
1637 and which is relevant to some types of light conveyor belts.
NOTE 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.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from
other publications. These normative references are cited at the appropriate places in the
text and the publications are listed hereafter. For dated references, subsequent
amendments to or revisions of any of these publications apply to this European Standard
only when incorporated in it by amendment or revision. For undated references the
latest edition of the publication referred to applies (including amendments).
EN 292-2 Safety of machinery - Basic concepts, general principles for
design - Part 2 :Technical principles and specification.
prEN 619 Continuous handling equipment and systems - Safety and EMC
requirements for equipment for mechanical handling of unit loads.
prEN 620 Continuous handling equipment and systems - Safety and EMC
requirements for fixed belt conveyors for bulk materials.
EN 873 Light conveyor belts - Principal characteristics and applications.
EN 1554:1998 Conveyor belts - Drum friction testing.
EN 1637 Light conveyor belts - Test methods for the measurement of the
electrical resistances.
EN 1718 Light conveyor belts - Test method for the measurement of the
electrostatic field generated by a running light conveyor belt.
prEN 12881-1:1997 Conveyor belts - Fire simulation flammability testing - Part 1:
Propane gallery tests.
EN 20284 Conveyor belts - Electrical conductivity - Specification and method
of test (ISO 284:1982).
EN 20340 Conveyor belts - Flame retardation – Specifications and test
method (ISO 340:1988).
4
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EN 12882:2001 (E)
3 Terms and definitions
For the purposes of this European Standard, 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
3.3
flame (noun)
zone of combustion in the gaseous phase usually with emission of light
flame (verb)
to undergo combustion in the gaseous phase with emission of light
3.4
glowing
made luminous by heat, (without flame)
3.5
undamaged
part remaining of a conveyor belt after the termination of the propane gallery fire test
described in accordance with prEN 12881-1:1997 and which part shows no evidence
of embrittlement, cracking, blistering or other blemishes not originally present
4 Requirements for safety
4.1 Electrical conductivity
All general purpose conveyor belts shall have an electrical resistance less than
300 M when tested in accordance with EN 20284.
Light conveyor belts as described in EN 873 shall have an electrical resistance of
less than 300 M when tested in accordance with EN 1637.
Light conveyor belts with an internal conductive layer which fail to meet the above
requirement shall not generate an electrostatic charge resulting in a surface potential
of more than 500 V when tested in accordance with EN 1718.
Under special service conditions, higher electrostatic charges resulting in surface
potentials of more than 500 V can be generated due to friction between conveyor
5
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EN 12882:2001 (E)
belt and conveyed goods, or due to friction within the conveyed goods or due to the
run of the belt over a reverse roller. Critical goods in this respect are mostly bulk
goods such as sugar, flour or plastic granules. The requirements for safety in this
standard do not consider such critical service conditions, but only the run of the
empty light conveyor belt and the electrostatic charges generated thereby. In these
circumstances an agreement on the safety requirements should be made between
the user and the supplier or manufacturer, based on the actual circumstances of use
(See informative annex A).
In certain circumstances, electrical safety requirements for light conveyor belting (see
EN 873) can be specified in terms of volume resistance as measured by the
methods in EN 1637.
4.2 Flame retardation- Requirements
4.2.1 Conveyor belts in category 2A or 3A, (see clause 5 and Table 1), when tested
in accordance with EN 20340 with covers intact, shall have an aggregate of the
times for duration of flame 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 and 3B, (see clause 5 and Table 1), when tested
in accordance with EN 20340 with covers intact and also with covers removed, shall
have an aggregate of the times for duration of flame 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.
4.2.3 Until EN 20340 is amended , the test pieces , for the purposes of applying the
test to steel cord conveyor belting , shall be selected as follows :
Select 6 test pieces in the longitudinal direction of the belt
...
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