BS EN 12882-2015 Conveyor belts for general purpose use Electrical and flammability safety requirements《通用传送带 电气和易燃性要求》.pdf

1、BSI Standards PublicationBS EN 12882:2015Conveyor belts for generalpurpose use Electricaland flammability safetyrequirementsBS EN 12882:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12882:2015. Itsupersedes BS EN 12882:2008 which is withdrawn.The UK parti

2、cipation in its preparation was entrusted to TechnicalCommittee PRI/67, Conveyor belts.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for it

3、s correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 84179 8ICS 13.220.40; 53.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Po

4、licy and Strategy Committee on 31 August 2015.Amendments issued since publicationDate Text affectedBS EN 12882:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12882 August 2015 ICS 53.040.20 Supersedes EN 12882:2008English Version Conveyor belts for general purpose use - Electrical and flam

5、mability safety requirements Courroies transporteuses usage gnral - Prescriptions de scurit lectrique et protection contre linflammabilit Frdergurte fr allgemeine Anwendung - Elektrische und brandtechnische Sicherheitsanforderungen This European Standard was approved by CEN on 27 June 2015. CEN memb

6、ers 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 applicati

7、on 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 Managem

8、ent 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,

9、Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 1

10、7, 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 EBS EN 12882:2015EN 12882:2015 (E) 2 Contents Page European foreword .3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .

11、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

12、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 BS EN 12882:2015EN 12882:2015 (E) 3 E

13、uropean 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 i

14、dentical 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

15、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 thi

16、s 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 requ

17、irements 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:

18、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, S

19、weden, Switzerland, Turkey and the United Kingdom. BS EN 12882:2015EN 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 do

20、cument. 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 ty

21、pe 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 o

22、n 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

23、) 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 applicati

24、on 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 aspect

25、s 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 use

26、r to select the category of conveyor belt most suited to the particular circumstances of the application. BS EN 12882:2015EN 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 undergroun

27、d 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 s

28、ome 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

29、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 bu

30、t 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 stan

31、dards 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

32、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 meth

33、od (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 gene

34、rated 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 t

35、he 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 BS EN 12882:2015EN 12882:2015 (E) 6 3.3 flame, noun zone of combustion in the gaseous phase usually with emission of light 3.4 fla

36、me, 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

37、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

38、 conductivity 4.2.1 When tested in accordance with EN ISO 284, all general purpose conveyor belts shall have an electrical surface resistance not greater than 300 M. 4.2.2 Light conveyor belts as described in EN ISO 21183-1 shall have an electrical surface resistance not greater than 300 M when test

39、ed in accordance with 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 tested in accordance with EN ISO 21179. NOTE Under s

40、pecial service conditions, whereby higher electrostatic charges resulting in surface potentials of more than 1000 V can be generated due to friction between belt surface and conveyed goods, or due to friction within the conveyed goods like non-conductive bulk goods such as sugar, flour or plastic gr

41、anules. 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 certain circumstances (e.g. in the transportation of electronic components), the dissipation of

42、 electrical charges through the belt may be required. This requirement can be specified in terms of volume resistance as measured by the method described in EN ISO 21178. However, the requirements for safety in this standard do not consider the volume resistance of light conveyor belts for the alloc

43、ation to the different safety categories. 4.3 Flame retardation 4.3.1 Conveyor belts in category 2A, or 3A, (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 an

44、d no individual result shall be greater than 15 s. BS EN 12882:2015EN 12882:2015 (E) 7 4.3.2 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

45、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. 4.4 Fire simulation 4.4.1 Conveyor belts in categories 4A and 4B, 5A, 5B and 5C (see Clause 5 and

46、 Table 1), when tested in accordance with Method A, C or D of EN 12881-1:2014, shall retain a length of undamaged conveyor belt as indicated in Table 1. 4.4.2 The test methods in accordance with EN 12881-1 are not applicable for light conveyor belts as described in EN ISO 21183-1. Therefore light co

47、nveyor belts can only be assigned to the categories 1, 2A and 2B. 4.5 Drum friction 4.5.1 Conveyor belts in categories 3A, 3B and 4B (see Clause 5 and Table 1), when tested in accordance with Method B1 of EN 1554:2012 (constant load of 343 N), shall exhibit no flame whatsoever throughout the test, w

48、hich shall continue for 60 min duration, or until the belt breaks, whichever is the shorter time. 4.5.2 Conveyor belts in category 5A (see Clause 5 and Table 1), when tested in accordance with Method B2 of EN 1554:2012, shall exhibit no flame whatsoever throughout the test, which shall continue for

49、150 min duration, or until the belt breaks, whichever is the shorter time. 4.5.3 Conveyor belts in category 5B (see Clause 5 and Table 1), when tested in accordance with Method B2 of EN 1554:2012, shall exhibit no flame or glowing whatsoever throughout the test, which shall continue for 150 min duration, or until the belt breaks, whichever is the shorter time. 4.5.4 Conveyor belts in category 5C (see Clause 5 and Table 1), when tested in accordance with Method B2 of EN 1554:2012, shall exhibit no flame or glowing whatsoever throughout the test, which shall conti