ISO 2477 2005.docx

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1、INTERNATIONALSTANDARDISO2477Thirdedition2005-06-15Shapedinsulatingrefractoryproducts一DeterminationofpermanentchangeindimensionsonheatingProduitsrefractairesisolatsfaonnesDeterminationdeIavariationpermaetededimensionssous!,actiondeIacha!eurReferencenumberISO24772005(E)PDFdisclaimerThisPDFfilemayconta

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5、permissioninwritingfromeitherISOattheaddressbeloworISOsmemberbodyinthecountryoftherequester.ISOcopyrightofficeCasepostale56CH-1211Geneva20Tel.+41227490111Fax+41227490947E-mailcopyrightiso.orgWebwww.iso.orgPublishedinSwitzerlandForewordISO(theInternationalOrganizationforStandardization)isaworldwidefe

6、derationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmenta

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8、sistoprepareInternationalStandards.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting.PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote.Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybet

9、hesubjectofpatentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.ISO2477waspreparedbyTechnicalCommitteeISO/TC33,Refractories.Thisthirdeditioncancelsandreplacesthesecondedition(ISO2477:1987),whichhasbeentechnicallyrevisedtoalignitwithEN1094-6.TheprincipalchangesconcernInorma

10、tivereferences,ItermsanddefinitionstobringthestandardintolinewithISO836,andIrevisionstoclausesconcerningsampling,measuringequipment,testtemperatureanddistribution,andheating.ShapedinsulatingrefractoryproductsDeterminationofpermanentchangeindimensionsonheating1 ScopeThisInternationalStandarddescribes

11、amethodfordeterminingthepermanentchangeindimensionsonheatingofashapedinsulatingrefractoryproduct.2 NormativereferencesThefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocum

12、ent(includinganyamendments)applies.ISO5016,Shapedinsulatingrefractoryproducts-Determinationofbulkdensityandtrueporosity3 TermsanddefinitionsForthepurposesofthisdocument,thefollowingtermsanddefinitionsapply.3.1permanentchangeindimensionsonheatingdimensionalexpansionorcontractionthatremainsinarefracto

13、rythatisheatedwithnoexternallyappliedforcetoaspecifiedtemperatureforaspecifiedtimeandthencooledtoambienttemperature3.2insulatingrefractoryproductshapedrefractoryhavingatrueporosityofnotlessthan45%(volumefraction)whendeterminedinaccordancewithISO50164 PrincipleTestpiecesintheshapeofrectangularprismsa

14、recutfromeachbrickoritem,thendriedandthedistancebetweentwooppositefacesoneachtestpieceismeasured.Thetestpiecesareheatedinafurnacehavinganoxidizingatmosphere,ataprescribedratetoaspecifiedtemperaturewhichismaintainedforaspecifiedtime.Aftercoolingtoambienttemperature,thetestpiecesaremeasuredagain,andth

15、epermanentchangeindimensionsiscalculated.5 Apparatus5.1 Furnace,eitherelectricorgas-fired,capableofheatingthetestpiecesdescribedin6.2,inacontinuouslyoxidizingatmosphere,atthespecifiedrate(see7.6),andofmaintainingthetesttemperaturefortherequiredtime.Theuseofanelectricfurnaceisrecommended,butagas-fire

16、dfurnacemaybeusedprovidedthatthefurnaceatmosphereiscontinuouslyoxidizingandthereisprovisionformonitoringthiscondition.5.2 Thermocouples,minimumofthree,tomeasurethetemperatureandthetemperaturedistributionabovethespaceoccupiedbythetestpieces.5.3 TemperatureZtimeregistrationdevice,foruseinconjunctionwiththethermocouples(5.2),sothatacontinuousrecordofthetemperatureisobtained.