1、BRITISH STANDARD BS EN 13827:2003 Steel cord conveyor belts Determination of the lateral and vertical displacement of steel cords The European Standard EN 13827:2003 has the status of a British Standard ICS 53.040.20 BS EN 13827:2003 This British Standard was published under the authority of the Sta
2、ndards Policy and Strategy Committee on 9 January 2004 BSI 9 January 2004 ISBN 0 580 43235 1 National foreword This British Standard is the official English language version of EN 13827:2003. The UK participation in its preparation was entrusted to Technical Committee PRI/67, Conveyor belts, which h
3、as the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section
4、entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compl
5、iance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related
6、 international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Am
7、endments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN13827 December2003 ICS53.040.20 Englishversion SteelcordconveyorbeltsDeterminationofthelateraland verticaldisplacementofsteelcords Courroiestransporteusescarcassemtallique Dterminationdudplacemen
8、tlatraletverticaldescbles dacier StahlseilFrdergurtePrfungderhorizontalenund vertikalenLagederStahlseile ThisEuropeanStandardwasapprovedbyCENon3November2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationals
9、tandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertherespo
10、nsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,S
11、lovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13827:
12、2003:EEN13827:2003(E) 2 Contents Page Foreword. 3 1 Scope . 4 2 Normativereferences . 4 3 MethodA.Determinationofcordpitchandsupportedbeltwidth 4 4 MethodB.Determinationoftheverticaldisplacementofcordsrelativetoameanlevel 6 5 Testreport . 8 Bibliography . 9EN13827:2003(E) 3 Foreword Thisdocument(EN1
13、3827:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC188“Conveyorbelts”, thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyJune2004,andconflictingnationalstandardsshallbewithdrawnat thelatest
14、byJune2004. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands, Norway,Portugal,S
15、lovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN13827:2003(E) 4 1Scope ThisEuropeanStandardspecifiesmethodsforthedeterminationofthemeanlateraldisplacementbetween cords,andforthedeterminationoftheverticaldisplacementofcordsrelativetoameanlevelofsteelcords withinaconveyorbeltasdescribedinprENISO
16、152361. 2 Normativereferences Notapplicable. 3 MethodA.Determinationofcordpitchandsupportedbeltwidth 3.1Apparatus NOTE Ifthereareothermeasuringtoolswiththesameorbetterprecisionthesecanalsobeused. 3.1.1 Measuringtape, graduatedindivisionsof1,0mm. 3.1.2 Handheldopticalmagnifier ,incorporatingascalegra
17、duatedindivisionsof0,1mmandhavinga magnificationofnotlessthanx8. 3.1.3 Dialgaugemicrometer ,graduatedindivisionsof0,1mm. 3.1.4 Flathorizontalsurface tosupportthefullwidthoftheconveyorbelt. 3.2 Testpiece Thetestpieceshallbeoffullbeltwidthandnotlessthan50mmlong.Thecutedgesshallbesmooth,freeof contamin
18、ationandshallexposethecordsclearly. Ifthecutedgesarenotsmoothenoughthetestpiececanbepreparedinadifferentwaysothattheposition ofthecordscanbemeasuredwithaprecisiongiveninthisEuropeanStandard. 3.3Procedure 3.3.1 Determinationofmeancordpitch (t m ) Usingthemeasuringtape(3.1.1),measurethedistancetothene
19、arest1,0mmbetweentheouteredgesofthe firstandlastcordacrossthewidthofthetestpiece(seeFigure1),andrecordthisvalueas( b t +d ). Alternatively,usethemeasuringtapetomeasurethebeltwidthtothenearest1,0mmandmeasurethe thicknessoftheedgerubber,b k ,atbothedgestothenearest0,5mm;( b t +d)isthebeltwidthlessedge
20、 rubberthickness. Usingthemicrometer(3.1.3),orthehandheldopticalmagnifier(3.1.2),measurethediameterofeitherthe firstorthelastcordinthetestpiecetothenearest0,1mmandrecordthevalueas( d). Countthetotalnumberofcordsacrossthewidthofthetestpieceandrecordthenumberas( n).EN13827:2003(E) 5 Figure1Illustratio
21、nofmeasurementstakenformeasurementof t m Calculatethemeancordpitch t m asfollows: t m (b t d) d (n 1) = +- - Expresstheresulttothenearest0,1mm. 3.3.2 Measurementofsupportedbeltwidth( b t )(seeFigure1) Calculatethesupportedbeltwidth b t asfollows: b t =(b t +d)d Expresstheresultstothenearest0,1mm. Ca
22、lculatethepercentageofthedeviationoftheactualsupportedbeltwidthtothecalculatedsupportedbelt widthasfollows: % 100 1) (n 100 - - = D t m b t b t 3.3.3 Measurementofthecordpitcheswithinacontrolsection(seeFigure2) Selectany21consecutivelyadjacentcordswithinthetestpiece. Usingthemicrometer(3.1.3)ortheha
23、ndheldopticalmagnifier(3.1.2),measurethepitchesbetweenthe21 cordsandrecordthemas t 1 ,t 2 ,t 20. NOTE Iftheserequirementscannotbemetwithinthiscontrolsection,thecontrolsectionmaybeincreasedin multiplesof20pitchesuntilallpitchesaremeasured.EN13827:2003(E) 6 Figure2Illustrationofmeasurementstakenofcord
24、pitchesincontrolsection 4 MethodB.Determinationoftheverticaldisplacementofcordsrelativetoamean level. NOTE Thistestcanonlybeconductedonaconveyorbeltthathasauniformcoveronatleastoneside.Thisis becausetheoutersurfaceoftheuniformcoverisusedasthebasedatumformeasurementsofcordheight.Variationsin thebased
25、atumwilladverselyeffecttheprecisionofthetest. 4.1Apparatus NOTE Ifthereareothermeasuringtoolswiththesameorbetterprecisionthesecanalsobeused. 4.1.1 Adialgaugemicrometer asdescribedin3.1.3. 4.1.2 Ahandheldopticalmagnifier asdescribedin3.1.2. 4.1.3 Aflatsurface asdescribedin3.1.4. 4.2 Testpiece Usethet
26、estpiecedescribedin3.2. 4.3Procedure 4.3.1 Measurementofmeancordheight( h m ) Atevenlyspacedintervalsacrossthewidthofthetestpieceselectanumberofcordsequalto10%ofthe totalnumberofcordsinthebelt. Figure3Measurementofmeancordheight(h m ) Placethetestpiecewiththeuniformcoverdown,onthehorizontalsurface(3
27、.1.4).Ifnecessaryensurethat thetestpieceremainsflatbyusingclamps.EN13827:2003(E) 7 Usingthemicrometer(4.1.1)ortheopticalmagnifier(4.1.2)measuretheheightofeachoftheselectedcords relativetothebottomsurfaceofthebelt.Themeasurementbeingtakentotheupperedgeofthecord(see Figure3).Recordtheindividualmeasure
28、ments h 1 ,h 2 ,h 3 h n . Calculatethemeanheight h m asfollows: h m h 1 h 2 h 3 h n n = + where nisthenumberofcordsselected. 4.3.2 Measurementofdisplacedcordsaboveandbelowthemeanvalue( h) Identifyanycordswhichappeartobehigherorlowerthanthemeanlevel h m . Measuretothenearest0,5mmtheheight hoftheupper
29、edgeofthecordoverthebottomsurfaceand calculatethedifferenceD h,inthelevelofeachdisplacedcordrelativetothemeanheight, h m ,ignoring whetherthedeviationispositiveornegative(seeFigure4). Arrangetheresultsintothreelevelsofseverity D h 1 , D h 2 and D h 3 andtabulatetheresultsintheformshownin Table1.Calc
30、ulatethepercentagebasedonthetotalnumberofcordsacrossthetestpiece. Table1Evaluationofheightdifferences D h 1 D h 2 D h 3 Totalnumberof cordsinthetest piece Noofcords h h m 1,0mm Noofcords h h m 1,0mmand h m 1,5mm Noofcords h h m 1,5mm Quantity Percentage Quantity Percentage Quantity Percentage Figure
31、4IllustrationofmeasurementofcordheightEN13827:2003(E) 8 5 Testreport Thetestreportshallincludethefollowingparticulars: a) referencetothisEuropeanStandard; b) identificationofthesteelcordbelttested; c) meancordpitch( t m ); d) deviationofsupportedbeltwidth; e) deviationofindividualpitches; f)percenta
32、ge D h 1 , D h 2 , D h 3 values; g) dateofthetest.EN13827:2003(E) 9 Bibliography prENISO152361, SteelcordconveyorbeltsPart1:Design,dimensionsandmechanicalrequirements forconveyorbeltsforgeneraluse(ISO/DIS152361:1996)BS EN 13827:2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Inst
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