1、BRITISH STANDARD BS EN 248:2002 Sanitary tapware General specification for electrodeposited coatings of Ni-Cr The European Standard EN 248:2002 has the status of a British Standard ICS 91.140.70 BS EN 248:2002 This British Standard was published under the authority of the Standards Policy and Strate
2、gy Committee on 29 January 2003 BSI 29 January 2003 ISBN 0 580 41165 6 National foreword This British Standard is the official English language version of EN 248:2002. It supersedes BS EN 248:1992 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee B/504,
3、 Water supply, to Subcommittee B/504/8, Terminal fittings, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to
4、in this document may be found in the BSI Catalogue under the section 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
5、 a contract. Users are responsible for its correct application. Compliance 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 prop
6、osals 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 front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. The BSI copyright date display
7、ed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN248 October2002 ICS91.140.70 SupersedesEN248:1989 Englishversion SanitarytapwareGeneralspecificationforelectrodeposited coatings
8、ofNiCr RobinetteriesanitaireSpcificationsgnralesdes revtementslectrolytiquesdeNiCr SanitrarmaturenAllgemeineAnorderungenfr elektrolytischeNiCrberzge ThisEuropeanStandardwasapprovedbyCENon2September2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivi
9、ngthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyot
10、herlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Ma
11、lta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMe
12、mbers. Ref.No.EN248:2002EEN248:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Exposedsurfaces 4 4.1 Conditionofexposedsurfaces . .4 4.2 Descriptionofpossibledefects. .5 4.3 Visualexaminationbeforetests. 5 4.4 Requirements .5 5 Qualityofcoating .5 5.1
13、Corrosionresistancetesttestwithneutralsalinespray .5 5.2 TestforcoatingadherenceTestforresistancetothermalshock6 AnnexA (informative) ImagetypeextractfromENISO10289:20018 AnnexB (informative) Testtemperaturetolerancesinrelationtotestduration 9EN248:2002(E) 3 Foreword Thisdocument(EN248:2002)hasbeenp
14、reparedbyTechnicalCommitteeCEN/TC164,“Watersupply“,the secretariatofwhichisheldbyAFNOR. ThisEuropeanStandard shallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyApril2003andconflictingnationalstandardsshallbewithdrawnatthelatestby April2003. Thi
15、sdocumentsupersedesEN248:1989. InthisEuropeanStandardAnnexesAandBareinformative. Thisstandardcomplementsproductstandardsalreadypublishedordraftstandardsbeingdevelopedby CEN/TC 164/WG 8.(singletapsandcombinationtapsthermostaticmixingvalves,jetregulators,mechanical mixingvalves,wasteoutletfittings.)wh
16、ichrefertothisstandard. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portuga
17、l,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN248:2002(E) 4 1Scope ThisEuropeanStandardspecifies: theconditionoftheexposedsurfacesoftapware; thecharacteristics(resistancetocorrosion,adherence)ofthesurfacecoating; thetestsforverifyingthesecharacteristics. Itappliestoallsanitaryfittings(supplyorwas
18、tefittings)whichhaveametallicNiCrcoating,whateverthenatureof thesubstratematerial. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For
19、datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). ENISO10289:2001, Methodsforcorrosiontestingofmetallicandothe
20、rinorganiccoatingsonmetallicsubstrates Ratingoftestspecimensandmanufacturedarticlessubjectedtocorrosiontests(ISO10289:1999) ISO9227, CorrosiontestsinartificialatmospheresSaltspraytests. 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thefollowingtermsanddefinitionsapply. 3.1 exposedsurfac
21、es outsidesurfacesoftapwarearethesurfaceswhicharevisibleinuseconditions 3.2 surfacesnotconsideredasexposedsurfaces: a) internalsurfacesof,forexampleoperatingmembers,caps,knobs,etc.; b) partsusuallyoralwayshiddenbyanothercomponent,e.g.linkageofawasteoutletfitting. 4 Exposedsurfaces 4.1 Conditionofexp
22、osedsurfaces Exposedsurfacesshallbeprotectedagainstcorrosion.EN248:2002(E) 5 4.2 Descriptionofpossibledefects Thedifferenttypesofdefectsfoundonexposedsurfacesareasfollows:(Seetable1) Table1Differenttypesofdefects Yellowcolour: Littleornochromeoverthenickel Stains: Faultsunderthenickelplating Pitting
23、orporosity: Surfacefaultsinthebasemetaloremissionofgasintreatmentbaths Blisters: Bubblesorraisedspotsontheplatedsurface Wheelmarks: Fineorsharplinesthatremainafterpolishingorbuffing Cracks: Usuallycausedby“hotspots”incastingorplatedsurfaceflakiness Splashes: Lackof“flow”incastingorplasticinjection D
24、ullness: Lackoffullshine Cutsandscratches: Scratchesduetohandlingorknocksduringtransport Burns: Roughnessandgreyappearanceofsurface Scaliness: Lackof“consistentcover”andflakinessofplating Orangepeel”effect: defectinsmoothness(similartopeelofanorange) Roughnessgrain Metallicimpuritiesinnickelbaths 4.
25、3 Visualexaminationbeforetests Theexposedsurfacesshouldbeexaminedwiththenakedeye,fromadistanceofabout300mmforapproximately 10s,withoutanymagnifyingdevice,inalight(diffusedandnotdazzling)ofanintensityof700Luxto1000Lux. 4.4Requirements Duringexamination,theexposedsurfacesshouldnotshowanyofthedefectsde
26、scribedinTable1,withthe exceptionofslightyellowishorbluishmarks. 5 Qualityofcoating 5.1 Corrosionresistancetesttestwithneutralsalinespray 5.1.1General Thetestdescribedisatypetest(laboratorytest),andnotaqualitycontroltestcarriedoutduringmanufacture. 5.1.2Method Carryoutthetestundertheconditionsdescri
27、bedinISO9227specificallyforthe neutralsalinespraytest,inthe followingway. Subjectthepartiallydismantledtapwareanditsaccessoriestosprayingfor200hminimum,arrangingarestperiod of(481)hhalfwaythroughthetreatment,ieafterthefirst100h1hofspraying.Duringtherestperiod,maintain theheatofthetank. Fortheduratio
28、nofthetests,thetankshouldonlybeopenedtocheckandmaintaintheconditions,themaximum restperiodinsprayingbeing30minperday.Theheatingshouldnotbeinterrupted;samplesundertestshouldnot behandled,washedorchecked.EN248:2002(E) 6 Aftertreatmentandbeforevisualexamination,rinsethetestsamplesinwatertoremoveanysalt
29、residue. Afterthetest,examinethesurfaceswiththenakedeye,forapproximately10s,fromadistanceofabout300mm, withoutanymagnifyingdevice. 5.1.3Requirements Aftercompletingthesaltspraytest,examinethetestsamplesintheconditionsspecifiedinENISO10289inthe followingway. Examinethesamplesinaccordancewith4.2and4.3
30、. Fromthisexamination,definetheareaAcoveredbydefects,asapercentageofthetotalareaofthetestpiece. ThissurfaceareaAshouldbelessthanorequalto0,1%(A 0,1%).Thedefectsshouldnotexceedadimension of0,3mm.(ForanexampleseeannexAanextractfromENISO10289:2001showingavisualrepresentationof thetypesoffaultwhichcorre
31、spondtothelimitof0,1%). 5.2 TestforcoatingadherenceTestforresistancetothermalshock 5.2.1General Thetestdescribedisatypetest(laboratorytest)andnotaqualitycontroltestcarriedoutduringmanufacture.It appliesonlytoplasticmaterialswithNiCrcoating. 5.2.2Method Thetestconsistsofsubjectingsamplestoaseriesofth
32、ermalshocks,wherebythenumberofcycles,temperatures anddurationsareindicatedinTable2.Forthedefinedcycles,thevectorforheatingandcoolingisair.Beforethe introductionofthesamples,allareasofthetestenvironmentshouldbeatthesettemperatureandwithinthe specifiedtolerancelevels. Thetestsampleshallbesubjectedtocy
33、clesdescribedinTable2,seealsoannexB(informative) Table2Summaryoftemperaturesof heatingandcoolingconditiontimesoftestpieces Temperaturetobereached Air (702)C Timeforheatingandstabilisation 30min. Returntoambienttemperature Air ( ) C 5 0 15 + Coolingtimetoambienttemperature 15min. Coolingtemperature A
34、ir ( ) C 5 0 30 + - Coolingtime 30min Returntoambienttemperature Air ( ) C 5 0 15 + Timetoreheattoambient temperature 15min Numberofcycles 5EN248:2002(E) 7 5.2.3 Visualexaminationaftertests Theexposedsurfacesshallbeexaminedwiththenakedeye,fromadistanceofabout300mmforapproximately 10s,withoutanymagni
35、fyingdevice,inalight(diffusedandnotdazzling)ofanintensityof700Luxto1000Lux. 5.2.4Requirements Aftertesting,nocracks,blistersnorlooseningofthecoatingshallberecorded.(Theareasusedformarkingshall beexcludedfromthetestrequirements).EN248:2002(E) 8 Annex A (informative) ImagetypeextractfromENISO10289:200
36、1 Examplesofsurfaceswithdefectsrepresenting0,1%ofthetotalareaofthetestsample.EN248:2002(E) 9 Annex B (informative) Testtemperaturetolerancesinrelationtotestduration FigureB.1Testtemperaturetolerancesinrelationtotestduration Thetestsathighandlowtemperaturesareconductedincirculated,dryair.BS EN 248:20
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