1、BSI Standards PublicationBS EN 14973:2015Conveyor belts for use inunderground installations Electrical and flammabilitysafety requirementsBS EN 14973:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14973:2015.It supersedes BS EN 14973:2006+A1:2008 which is
2、withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/67, Conveyor belts.A list of organizations represented on this committee can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
3、are responsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79324 0ICS 53.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theS
4、tandards Policy and Strategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 14973:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14973 November 2015 ICS 53.040.10; 13.220.40 Supersedes EN 14973:2006+A1:2008English Version Conve
5、yor belts for use in underground installations - Electrical and flammability safety requirements Courroies transporteuses pour usage dans les installations souterraines - Prescriptions de scurit lectrique et protection contre linflammation Frdergurte fr die Verwendung unter Tage - Elektrische und br
6、andtechnische Sicherheitsanforderungen This European Standard was approved by CEN on 26 September 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.
7、 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 tr
8、anslation 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, Fin
9、land, 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 STANDARDIZAT
10、ION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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 14973:2015 EBS EN 14973:2015EN 14973:2015 2 Con
11、tents Page European foreword . 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and definitions . 7 4 Ignition hazard assessment . 8 5 Electrical resistance . 8 6 Frictional heating 8 6.1 Conveyor belts intended for general use in underground installations (Class A), and for use in hazard
12、ous installations where secondary safety devices are present (Classes B2 and C2) . 8 6.2 Conveyor belts intended for use in installations where there is a potentially flammable atmosphere and where secondary safety devices are not present (Class B1) 8 6.3 Conveyor belts intended for use in installat
13、ions where there is a potentially flammable atmosphere plus combustible dust or material conveyed, and where secondary safety devices are not present (Class C1) . 9 7 Resistance to ignition 9 7.1 Conveyor belts intended for general use in underground installations (Class A), for use where there is a
14、 potentially flammable atmosphere (Classes B1 and B2), and for use in hazardous installations where secondary safety devices are present (Class C2) 9 7.2 Conveyor belts intended for use in installations where there is a potentially flammable atmosphere plus combustible dust or material conveyed, and
15、 where secondary safety devices are not present (Class C1) . 9 8 Fire propagation 9 8.1 Introduction 9 8.2 Conveyor belts intended for general use in underground installations (Class A) and for use where there is a potentially flammable atmosphere (Classes B1 and B2) . 10 8.2.1 General . 10 8.2.2 Tw
16、o metre propane burner test . 10 8.2.3 Double burner test . 10 8.2.4 Mid-scale high energy test 10 8.3 Conveyor belts intended for use in installations where there is a potentially flammable atmosphere plus combustible dust or material conveyed, and where secondary safety devices are not present (Cl
17、ass C1) 10 8.4 Conveyor belts intended for use in installations where there is a potentially flammable atmosphere plus combustible dust or material conveyed, plus additional fuel sources (fire load) and where secondary safety devices are present (Class C2) . 11 8.4.1 Full scale gallery . 11 8.4.2 La
18、boratory scale gallery 11 9 Marking 11 Annex A (informative) Hazards and risk assessment 13 BS EN 14973:2015EN 14973:2015 3 A.1 Identification of hazards 13 A.2 Risk assessment 13 A.3 Methods for addressing hazards . 14 Annex B (informative) Example of an ignition hazard assessment for a conveyor be
19、lt intended for use in a potentially explosive atmosphere 15 Annex C (informative) Suggested conveyor belt approval / compliance options 16 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC 17 Annex ZB (informative) Relationship
20、 between this European Standard and the Essential Requirements of EC Directive 2006/42/EC 18 Bibliography . 19 BS EN 14973:2015EN 14973:2015 4 European foreword This document (EN 14973:2015) has been prepared by Technical Committee CEN/TC 188 “Conveyor belts”, the secretariat of which is held by SNV
21、. 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 May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. Attention is drawn to the possibility that some of the
22、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 supersedes EN 14973:2006+A1:2008. This document has been prepared under a mandate given to CEN by the European Commission and t
23、he European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are an integral part of this document. Significant technical changes between this document and the previous edition of this Euro
24、pean Standard: Requirements for alternative Fire Propagation test, method D, added. For a defined range of belts this laboratory scale test can be substituted for the full scale test specified in EN 12881-2 and 8.4 of this document. According to the CEN/CENELEC Internal Regulations, the national sta
25、ndards organizations 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,
26、Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 14973:2015EN 14973:2015 5 Introduction This document is a type C standard as stated in EN ISO 12100. The machinery concerned and the extent to which
27、 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 stand
28、ards, for machines that have been designed and built according to the provisions of this type C standard. The approach taken in this European Standard is to identify the main hazards encountered in underground conveying applications and to specify requirements for conveyor belts that will provide th
29、e necessary operational safety. Three Classes are specified, A, B and C, as defined in 3.9 to 3.11. NOTE According to national authorities Class C (C1/C2) conveyor belts are requested for use in EU coal mining. BS EN 14973:2015EN 14973:2015 6 1 Scope This European Standard specifies electrical and f
30、lammability safety requirements for conveyor belts intended for use in underground installations, in the presence of flammable or non-flammable atmospheres. Conveyor belts covered by this European Standard and intended for use in flammable atmospheres are intended for use on conveyor belt installati
31、ons (machinery in mines). The belt is a component or part of equipment, which can be incorporated into the conveyor, which is an equipment of Group I, Category M2, as defined in 3.2.2 of EN 13463-1:2009. This European Standard is not applicable to light conveyor belts as described in EN ISO 21183-1:
32、2006 nor is it applicable to conveyor belts which are manufactured before the date of publication of this document by CEN. This European Standard deals with those significant hazards detailed in A.1. Attention is drawn to Annexes ZA and ZB. NOTE A summary of the requirements of this European Standar
33、d is given in Table 2. This is intended for quick reference only. 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,
34、the latest edition of the referenced document (including any amendments) applies. EN 1554:2012, Conveyor belts Drum friction testing EN 1710:2005+A1:2008, Equipment and components intended for use in potentially explosive atmospheres in underground mines EN 12881-1:2014, Conveyor belts Fire simulati
35、on flammability testing Part 1: Propane burner tests EN 12881-2, Conveyor belts Fire simulation flammability testing Part 2: Large-scale fire test EN 13463-1:2009, Non-electrical equipment for use in potentially explosive atmospheres Part 1: Basic method and requirements EN 31010, Risk management Ri
36、sk assessment techniques 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 General principles for design Risk ass
37、essment and risk reduction (ISO 12100) EN ISO 15236-3:2007, Steel cord conveyor belts Part 3: Special safety requirements for belts for use in underground installations (ISO 15236-3:2007) EN ISO 22721:2007, Conveyor belts Specification for rubber- or plastics-covered conveyor belts of textile constr
38、uction for underground mining (ISO 22721:2007) BS EN 14973:2015EN 14973:2015 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 12100 and the following apply. 3.1 afterflame flame which persists after the ignition source has been removed 3.2 afterg
39、low 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 to flame (verb) to undergo combustion in the gaseous phase with emission of light 3.
40、5 glowing made luminous by heat (without flame) 3.6 undamaged that part of a conveyor belt remaining after the termination of the fire tests described in EN 12881 and which shows no evidence of embrittlement, cracking, blistering or other blemishes not originally present 3.7 secondary safety device
41、equipment or apparatus provided for the purpose of assisting in the provision of a safe working environment, e.g. slip detectors, heat detectors, water fire extinguishing systems 3.8 incomplete ignition situation in which the part of the conveyor belt above the burner burns only on the bottom side a
42、nd not on the top side when the burner is removed 3.9 class A belt conveyor belt intended for general use where the only hazard is limited access and means of escape 3.10 class B belt conveyor belt intended for use where there is limited access and means of escape, where a potentially explosive atmo
43、sphere is present and where secondary safety devices are either not present (Class B1) or present (Class B2) BS EN 14973:2015EN 14973:2015 8 3.11 class C belt conveyor belt intended for use where there is limited access and means of escape, where a potentially explosive atmosphere is present, where
44、other combustible material or dust is either being conveyed or is a potential source of additional fuel (fire load) and where secondary safety devices are either not present (Class C1) or present (Class C2) 3.12 additional fuel source (fire load) material, eg wooden linings or plastic pipes, signifi
45、cantly additional to the conveyor belt and conveyed material which it is considered likely would contribute to the ignition source of the conveyor belt in a fire situation 3.13 potentially explosive atmosphere atmosphere which could become explosive due to local and operational conditions 4 Ignition
46、 hazard assessment In order to determine which class of conveyor belt has to be used in an underground installation. The operating company shall carry out an ignition hazard assessment. The result of such an assessment shall lead to a class of conveyor belt according to this standard. Annex A of thi
47、s standard and Annex A of EN 1710:2005+A1:2008 serve as aids for preparing such an ignition hazard assessment. NOTE An example of an ignition hazard assessment for a conveyor belt intended for use in a potentially explosive atmosphere is given in Annex B. 5 Electrical resistance When tested in accor
48、dance with EN ISO 284, conveyor belts intended for use in underground installations shall have an electrical surface resistance not greater than 300 M. 6 Frictional heating 6.1 Conveyor belts intended for general use in underground installations (Class A), and for use in hazardous installations wher
49、e secondary safety devices are present (Classes B2 and C2) When tested in accordance with EN 1554:2012, Method B2, or Method B1 if the use of Method B2 is impossible, e.g. when testing steel cord conveyor belts, conveyor belts intended for use in these applications shall exhibit no flame whatsoever, although glowing is permissible. No requirements are included for the maximum temperature of the drum. 6.2 Conveyor belts intended for use in installations where there is a potentially flammable atmosphere and where secondary safety devices are not p
