ISO 2477 2005.docx

INTERNATIONALSTANDARDISO2477Thirdedition2005-06-15Shapedinsulatingrefractoryproducts一DeterminationofpermanentchangeindimensionsonheatingProduitsrefractairesisolatsfaonnesDeterminationdeIavariationpermaetededimensionssous!,actiondeIacha!eurReferencenumberISO24772005(E)PDFdisclaimerThisPDFfilemaycontainembeddedtypefaces.InaccordancewithAdobe'slicensingpolicy,thisfilemaybeprintedorviewedbutshallnotbeeditedunlessthetypefaceswhichareembeddedarelicensedtoandinstalledonthecomputerperformingtheediting.Indownloadingthisfile,partiesacceptthereintheresponsibilityofnotinfringingAdobe'slicensingpolicy.TheISOCentralSecretariatacceptsnoliabilityinthisarea.AdobeisatrademarkofAdobeSystemsIncorporated.DetailsofthesoftwareproductsusedtocreatethisPDFfilecanbefoundintheGeneralInforelativetothefile;thePDF-creationparameterswereoptimizedforprinting.EverycarehasbeentakentoensurethatthefileissuitableforusebyISOmemberbodies.Intheunlikelyeventthataproblemrelatingtoitisfound,pleaseinformtheCentralSecretariatattheaddressgivenbelow.©ISO2005Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromeitherISOattheaddressbeloworISO'smemberbodyinthecountryoftherequester.ISOcopyrightofficeCasepostale56CH-1211Geneva20Tel.+41227490111Fax+41227490947E-mailcopyrightiso.orgWebwww.iso.orgPublishedinSwitzerlandForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO5alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part2.ThemaintaskoftechnicalcommitteesistoprepareInternationalStandards.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting.PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote.Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.ISO2477waspreparedbyTechnicalCommitteeISO/TC33,Refractories.Thisthirdeditioncancelsandreplacesthesecondedition(ISO2477:1987),whichhasbeentechnicallyrevisedtoalignitwithEN1094-6.TheprincipalchangesconcernInormativereferences,ItermsanddefinitionstobringthestandardintolinewithISO836,andIrevisionstoclausesconcerningsampling,measuringequipment,testtemperatureanddistribution,andheating.ShapedinsulatingrefractoryproductsDeterminationofpermanentchangeindimensionsonheating1 ScopeThisInternationalStandarddescribesamethodfordeterminingthepermanentchangeindimensionsonheatingofashapedinsulatingrefractoryproduct.2 NormativereferencesThefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO5016,Shapedinsulatingrefractoryproducts-Determinationofbulkdensityandtrueporosity3 TermsanddefinitionsForthepurposesofthisdocument,thefollowingtermsanddefinitionsapply.3.1permanentchangeindimensionsonheatingdimensionalexpansionorcontractionthatremainsinarefractorythatisheatedwithnoexternallyappliedforcetoaspecifiedtemperatureforaspecifiedtimeandthencooledtoambienttemperature3.2insulatingrefractoryproductshapedrefractoryhavingatrueporosityofnotlessthan45%(volumefraction)whendeterminedinaccordancewithISO50164 PrincipleTestpiecesintheshapeofrectangularprismsarecutfromeachbrickoritem,thendriedandthedistancebetweentwooppositefacesoneachtestpieceismeasured.Thetestpiecesareheatedinafurnacehavinganoxidizingatmosphere,ataprescribedratetoaspecifiedtemperaturewhichismaintainedforaspecifiedtime.Aftercoolingtoambienttemperature,thetestpiecesaremeasuredagain,andthepermanentchangeindimensionsiscalculated.5 Apparatus5.1 Furnace,eitherelectricorgas-fired,capableofheatingthetestpiecesdescribedin6.2,inacontinuouslyoxidizingatmosphere,atthespecifiedrate(see7.6),andofmaintainingthetesttemperaturefortherequiredtime.Theuseofanelectricfurnaceisrecommended,butagas-firedfurnacemaybeusedprovidedthatthefurnaceatmosphereiscontinuouslyoxidizingandthereisprovisionformonitoringthiscondition.5.2 Thermocouples,minimumofthree,tomeasurethetemperatureandthetemperaturedistributionabovethespaceoccupiedbythetestpieces.5.3 TemperatureZtimeregistrationdevice,foruseinconjunctionwiththethermocouples(5.2),sothatacontinuousrecordofthetemperatureisobtained.