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1、BS EN 12882:2008 ICS 13.220.40; 53.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Conveyor belts for general purpose use Electrical and flammability safety requirements Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:5
2、3, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2008 BSI 2008 ISBN 978 0 580 58508 1 Amendments/corrigenda issued since publication DateComments BS EN 12882:2008 National foreword This British Standard
3、 is the UK implementation of EN 12882:2008. It supersedes BS EN 12882:2002 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/67, Conveyor belts. A list of organizations represented on this committee can be obtained on request to its secretary. This
4、publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:5
5、3, Uncontrolled Copy, (c) BSI BS EN 12882:2008 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12882 October 2008 ICS 53.040.20Supersedes EN 12882:2001 English Version Conveyor belts for general purpose use - Electrical and flammability safety requirements Courroies transporteuses usage gnral -
6、 Prescriptions de scurit lectrique et protection contre linflammabilit Frdergurte fr allgemeine Anwendung - Elektrische und brandtechnische Sicherheitsanforderungen This European Standard was approved by CEN on 24 August 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations
7、 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 Management Centre or to any CEN member. This Europe
8、an 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 Management Centre has the same status as the official versions. CEN members are the nati
9、onal standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and
10、United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12882:2
11、008: E Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:53, Uncontrolled Copy, (c) BSI BS EN 12882:2008 EN 12882:2008 (E) 2 Contents Page Foreword3 Introduction.4 1 Scope 5 2 Normative references5 3 Terms and definitions .5 4 Safety requirements 6 5 Safety categories
12、.7 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC13 Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC14 Bibliography15 Licensed Copy: London South Ba
13、nk University, South Bank University, 16/11/2008 11:53, Uncontrolled Copy, (c) BSI BS EN 12882:2008 EN 12882:2008 (E) 3 Foreword This document (EN 12882:2008) has been prepared by Technical Committee CEN/TC 188 “Conveyor belts”, the secretariat of which is held by BSI. This European Standard shall b
14、e given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at the latest by April 2009. Attention is drawn to the possibility that some of the elements of this document ma
15、y 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 supersedes EN 12882:2001. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association,
16、and supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see informative Annex ZA and B, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to i
17、mplement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerl
18、and and the United Kingdom. Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:53, Uncontrolled Copy, (c) BSI BS EN 12882:2008 EN 12882:2008 (E) 4 Introduction This document is a type C standard as stated in EN ISO 12100-1. The machinery concerned and the extent to whi
19、ch 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 sta
20、ndards, 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
21、 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
22、 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
23、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
24、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 precaut
25、ions 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. The principal changes from the first edition of EN 12882 are as follows: e) the surface potential, whe
26、n measured in accordance with EN ISO 21179, has been increased from 500 V to 1 000 V, in the light of further experience since EN 12882:2001 was published; f) Annex A, which was an Extract from CENELEC Report CLC/R 044-001 “Safety of machinery Guidance and recommendations for the avoidance of hazard
27、s due to static electricity”, has been deleted as its inclusion has caused confusion between users and manufacturers of belts. Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:53, Uncontrolled Copy, (c) BSI BS EN 12882:2008 EN 12882:2008 (E) 5 1 Scope This European S
28、tandard 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 provi
29、de 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
30、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 esse
31、ntial 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 re
32、quirements 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 referenced documents are indispensable for the application of this document. For
33、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, Contin
34、uous handling equipment and systems Safety and EMC requirements for fixed belt conveyors for bulk materials EN 1554:1998, Conveyor belts Drum friction testing EN 12881-1:2005, Conveyor belts Fire simulation flammability testing Part 1: Propane burner tests EN ISO 284, Conveyor belts Electrical condu
35、ctivity Specification and test method (ISO 284:2003) EN ISO 340, Conveyor belts Laboratory scale flammability characteristics Requirements and test method (ISO 340:2004) EN ISO 12100-2, Safety of machinery Basic concepts, general principles for design Part 2: Technical principles (ISO 12100-2:2003)
36、EN ISO 21178, Light conveyor belts Determination of electrical resistances (ISO 21178:2005) EN ISO 21179, Light conveyor belts Determination of the electrostatic field generated by a running light conveyor belt (ISO 21179:2005) EN ISO 21183-1, Light conveyor belts Part 1: Principal characteristics a
37、nd applications (ISO 21183-1:2005) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:53, Uncontrolled Copy, (c) BSI BS EN 12882:2008 EN 12882:2008 (E) 6 3.1 afterflam
38、e 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 3.4 flame, ve
39、rb 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 embrit
40、tlement, 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 M. 4.1.2 Light conveyor belts
41、 as described in EN ISO 21183-1 shall have an electrical surface resistance not greater than 300 M when tested in accordance with EN ISO 21178 unless one of the conditions described in 4.1.2.1 to 4.1.2.3 applies. 4.1.2.1 Light conveyor belts with an internal conductive layer shall not generate an el
42、ectrostatic charge resulting in a surface potential of more than 1 000 V when tested in accordance with EN ISO 21179. 4.1.2.2 Under special service conditions, whereby higher electrostatic charges resulting in surface potentials of more than 1 000 V can be generated due to friction between a light c
43、onveyor belt and conveyed goods, or due to friction within the conveyed goods or due to the run of the light conveyor belt over a reverse roller, safety requirements shall be agreed between the purchaser/user and the manufacturer based on the actual circumstances of use. NOTE Critical goods in this
44、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. 4.1.2.3 In certain circumstances (
45、e.g. in the transportation of electronic components), the electrical safety requirement can be specified in terms of volume resistance as measured by the method described in EN ISO 21178, and values shall be agreed between the purchaser/user and the manufacturer based on the actual circumstances of
46、use. Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:53, Uncontrolled Copy, (c) BSI BS EN 12882:2008 EN 12882:2008 (E) 7 4.2 Flame retardation 4.2.1 Conveyor belts in category 2A or 3A (see Clause 5 and Table 1), when tested in accordance with EN ISO 340 with covers
47、 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 ISO 340 with covers intact and also wi
48、th 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. 4.3 Fire simulation Conveyor belts in categories 4A
49、and 4B, 5A, 5B and 5C (see Clause 5 and Table 1), when tested in accordance with Method A of EN 12881-1:2005, shall retain a length of undamaged conveyor belt of not less than 100 mm across the whole width of the conveyor belt after the end of the test. 4.4 Drum friction 4.4.1 Conveyor belts in categories 3A, 3B and 4B (see Clause 5 and Table 1), when tested in accordance with Method A1 of EN 1554:1998 (constant load of 343 N), shall exhibit no flame whatsoever throughout the test, which shall continue for 1 h duration, or un
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