1、BRITISH STANDARD BS EN 425:2002 Resilient and laminate floor coverings Castor chair test The European Standard EN 425:2002 has the status of a British Standard ICS 97.150 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 425:2002 This British Standard, having been prepared
2、under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 13 May 2002 BSI 13 May 2002 ISBN 0 580 39693 2 National foreword This British Standard is the official English language version
3、 of EN 425:2002. It supersedes BS EN 425:1994 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/60, Resilient floor coverings, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its s
4、ecretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Stand
5、ards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers
6、to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a fr
7、ont cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN425 April2002
8、ICS97.150 SupersedesEN425:1994 Englishversion ResilientandlaminatefloorcoveringsCastorchairtest RevtementsdesolrsilientsetstratifisEssaidela chaiseroulettes ElastischeBodenbelgeundLaminatbden Stuhlrollenversuch ThisEuropeanStandardwasapprovedbyCENon23February2002. CENmembersareboundtocomplywiththeCE
9、N/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexists
10、inthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finl
11、and,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploi
12、tationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN425:2002EEN425:2002(E) 2 Foreword ThisdocumentEN425:2002hasbeenpreparedbyTechnicalCommitteeCEN/TC134“Resilientandtextilefloor coverings“,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationa
13、lstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyOctober2002,andconflictingnationalstandardsshallbewithdrawnatthelatest byOctober2002. ThisdocumentsupersedesEN425:1994. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesar
14、eboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN425:2002(E) 3 1Scope ThisEuropeanStandardspecifiesamethodfordeterminingthechang
15、eofappearanceandstabilityofaresilient floorcoveringoralaminatefloorcovering,includingjoints,underthemovementofacastorchair. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext
16、,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN423, Resilientfl
17、oorcoveringsDeterminationoftheeffectofstains. EN684, ResilientfloorcoveringsDeterminationofseamstrength. EN12529:1998, CastorsandwheelsCastorsforfurnitureCastorsforswivelchairsRequirements. 3Principle Aresilientfloorcoveringoralaminatefloorcovering,includingoneormorejoints,treatedorweldedwhere neces
18、sary,issubjectedtothesimulatedmovementofacastorchair.Thecastorsmoveinepicycloidalpathswith multiplechangesofdirection,stopsandstarts,andthefrequencyofpassagevariesfromareatoarea. 4 Apparatusandmaterials 4.1Castorchairapparatus,comprisingthefollowing(seeFigure1): 4.1.1 Circularplate,ofminimumdiameter
19、750mm,thatrotatesataspeedof20 0 1 r/min.Thedirectionof rotationshallbereversedevery60r,withapauseof5sbeforerestarting; 4.1.2 Triangularmobileplatform, rotatinginthesamedirectionasthecircularplate,atafasternominalspeed of50r/min.Theplatformshallbeincontactwiththetestpieceviaaloadexertedbyatotalmassof
20、90kg (includingthemassofthecomponents)equallydistributedbetweenthreecastors; 4.1.3 Castorset, comprisingthreecastorswiththefollowingdimensions: diameterofcastors (50 2)mm widthofcastors (20 2)mm radiusofcurvatureofcastortread (130 5)mm crankdistance (32 2)mm distancebetweenanytwocastormountings (225
21、 5)mm ThecastorsshallbeTypeW,softtread,inaccordancewith4.2.2and5.4.4.2ofEN12529:1998.Thecastortreads shallbemadefrompolyurethaneandthesurfacesofthecastorwheelsshallbesmooth,withoutanydeepscoring orhardencrustedparticles. Thecastortreadsshallbeexaminedaftereachtestandreplacedasnecessary. NOTE Thepath
22、takenbyeachcastorisshowninFigure2.EN425:2002(E) 4 4.1.4 Suctiondevice, withtheheightofitsnozzlesbeingadjustable 4.1.5 Abaseforthetestpiece, consistingofeitheran8mmplywoodboardora6mmfibrecementboardoran 8mmacrylicglass 4.2 Vacuumcleaner 4.3 Illuminationdevice, asspecifiedinEN423 4.4 Rotaryviewingtabl
23、e, asspecifiedinEN423 4.5Materials 4.5.1 Whitecotton, inpadorclothform 4.5.2 Adhesiveordoublesidedadhesivetape 4.5.3Denatured ethanol Dimensionsinmillimetres 223 130 75 50 32 400 421 198 1 2 4 3 5 6 7 8 9 Key 1Totalmass90kg 6Specimen 2Distance3mm 7Suctionnozzlewithadjustableheight 3Load/driveplate 8
24、Testingplatform 4Castormountingplate 9Specimensupport 5Chain Figure1CastorchairtestapparatusEN425:2002(E) 5 7 4 9 1 6 3 8 5 2 Figure2 Pathofcastors 5 Samplingandpreparationoftestpieces Takearepresentativesamplefromtheavailablematerial. Takeonetestpiecewhichshallbeinstalledusingeitherdoublesidedadhes
25、ivetapeorwithadhesivein accordancewiththemanufacturersinstructions.Thediameterofthetestpieceshallbeatleast750mm. NOTE Wherenecessary,jointsshouldbetreatedinaccordancewiththemanufacturersinstructions.Apositionofthe joint(s)isasshowninFigure3. 6Conditioning Conditionthetestpieceatatemperatureof(232) C
26、andrelativehumidityof(505)%foraminimumof24h.EN425:2002(E) 6 Dimensionsinmillimetres d d d =83 1 Key 1 Joint Figure3 Positionofjoint(s) 7Procedure Inspectthesurfaceofthecastors,and,ifnecessary,cleanthemwithacottonpadimpregnatedwithdenatured ethanol,anddrythem. Precleanthetestpiecewithavacuumcleaner.
27、Fixthebaseforthetestpieceonthecircularplate,andlowerthetriangularplatformtoallowthecastorstocome intocontactwiththetestpiece.Presetthecounterfor25000revolutionsoftheplateandsettheapparatusin motionwiththesuctiondevicebeingoperatedcontinuously. Carryoutthetestwithinthetemperaturerangeof18 Cto25 C. NO
28、TE Thedurationofthetestisapproximately24h. Attheendofthetest,examinethetestpieceforappearancechangefromadistanceofapproximately800mmat anapproximateangleof45 andfromalldirectionsbyslowlyrotatingtheviewingtable.Recordanydamage causedbydetachmentoflayers,openingofjoints,orcrazing.Ignoreanyflatteningor
29、changeinappearance,e.g. changeingloss. Ifitisintendedtocarryouttensiletestsonthetreatedorweldedjoints,cutoutastripwiththejointinthecentre. Separatethetestpieceslowlyfromthebasebyrollingitonamandrelofapproximatediameter50mm.Carryout thetestinaccordancewithEN684. 8 Expressionofresults Expressthetypeof
30、damageforthetestpiece.Ifcarriedout,expresstheresultoftheseamstrengthtestin N/50mm.EN425:2002(E) 7 9 Testreport Thetestreportshallcontainthefollowinginformation: a) areferencetothisstandard,i.e.EN425; b) completeidentificationoftheproducttested,includingtype,source,colourandmanufacturersreference num
31、bers; c) previoushistoryofthesample; d) typeofadhesiveusedinthetest; e) natureofdamageobserved; f) seamstrengthtestresults,ifcarriedout; g) anydeviationfromthisstandardwhichmayhaveaffectedtheresults.BS EN 425:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the
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