BS EN 13471-2001 Thermal insulating products for building equipment and industrial installations - Determination of the coefficient of thermal expansion《建筑设备和工业设施用隔热制品 热膨胀系数的测定》.pdf

1、BRITISH STANDARD BS EN 13471:2001 Thermal insulating products for building equipment and industrial installations Determination of the coefficient of thermal expansion The European Standard EN 13471:2001 has the status of a British Standard ICS 91.120.10; 91.100.60 NO COPYING WITHOUT BSI PERMISSION

2、EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 13471:2001 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 09 November 2001 BSI 09 November 2001 ISBN

3、 0 580 38622 8 National foreword This British Standard is the official English language version of EN 13471:2001. This British Standard, together with BS EN 13467:2001, BS EN 13468:2001, BS EN 13469:2001, BS EN 13470:2001 and BS EN 13472:2001, partially supersedes BS 2972:1989. The UK participation

4、in its preparation was entrusted by Technical Committee RHE/9, Thermal insulating materials, to Subcommittee RHE/9/4, Nomenclature and specifications, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-referenc

5、es 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 Standards Electronic Catalogu

6、e. 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 to understand the text;

7、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 front cover, an inside fro

8、nt cover, the EN title page, pages 2 to 10, an inside back cover 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 EN13471 September

9、2001 ICS91.100.60 Englishversion Thermalinsulatingproductsforbuildingequipmentandindustrial installationsDeterminationofthecoefficientofthermal expansion Produitsisolantsthermiquespourlquipementdubtiment etlesinstallationsindustriellesDterminationdu coefficientdedilatationthermique Wrmedmmstoffefrdi

10、eHaustechnikundfr betriebstechnischeAnlagenBestimmungdes Wrmeausdehnungskoeffizienten ThisEuropeanStandardwasapprovedbyCENon18August2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalt

11、eration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberi

12、ntoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdo

13、m. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN13471:2001EEN13471:2001(E) 2 Contents page Foreword . 3

14、 1Scope . 4 2Normativereferences . 4 3Termsanddefinitions 4 4Principle . 5 5Apparatus 5 6Testspecimens . 7 7Procedure 8 8Calculationandexpressionofresults 9 9Accuracyofmeasurement . 9 10Testreport . 9EN13471:2001(E) 3 Foreword ThisEuropeanStandardhasbeenpreparedbyTechnicalCommitteeCEN/TC88“Thermalin

15、sulating materialsandproducts“,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofan identicaltextorbyendorsement,atthelatestbyMarch2002,andconflictingnationalstandardsshallbe withdrawnatthelatestbyMarch2002. ThisEuropeanStandardisoneo

16、faseriesofstandardswhichspecifytestmethodsfordetermining dimensionsandpropertiesofthermalinsulatingmaterialsandproducts.Itsupportsaseriesofproduct standardsforthermalinsulatingmaterialsandproductswhichderivefromtheCouncilDirectiveof21 December1988ontheapproximationoflaws,regulationsandadministrative

17、provisionsoftheMember Statesrelatingtoconstructionproducts(Directive89/106/EEC)throughtheconsiderationoftheessential requirements. ThisEuropeanStandardhasbeenpreparedforproductsusedtoinsulatebuildingequipmentand industrialinstallations,butitmayalsobeappliedtoproductsusedinotherareas. NoexistingEurop

18、eanStandardissuperseded. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthe followingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic, Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway, Portugal,Sp

19、ain,Sweden,SwitzerlandandtheUnitedKingdom.EN13471:2001(E) 4 1Scope ThisEuropeanStandardspecifiestheequipmentandproceduresfordeterminingthecoefficientoflinear thermalexpansion.Thestandardisapplicabletothermalinsulatingproductswithinthetemperaturerange 196 Cto850 C,subjecttothepossibletemperaturelimit

20、ationofthetestspecimens.Itshallnotbe usedforproductswhichduringthetestexperiencedimensionalchangesduetothelossofhydration waterorwhichundergootherphasechanges. NOTEBecauseofitssmalldimensionsthetestspecimenshouldbecarefullyselectedtoberepresentativeofthe productbeingtested. 2Normativereferences This

21、EuropeanStandardincorporates,bydatedorundatedreference,provisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublications applytothisEuropeanStandardonlywh

22、enincorporatedinitbyamendmentorrevision.Forundated referencesthelatesteditionofthepublicationreferredtoapplies(includingamendments). EN12085, ThermalinsulatingproductsforbuildingapplicationsDeterminationoflineardimensionsof testspecimens. 3Termsanddefinitions ForthepurposeofthisEuropeanStandard,thef

23、ollowingtermsanddefinitionsapply: 3.1 linearthermalexpansion reversiblechangesinthelengthofaproductresultingfromachangeintemperature 3.2 meancoefficientoflinearthermalexpansion m betweendifferenttemperatures reversiblechangeinlengthdividedbythelengthatthereferencetemperatureandthetemperature differe

24、ncebetweenthetesttemperatures 3.3 coefficientofthermalexpansion t atthetemperature T limitvalueof m asthehighertemperatureapproachesthelowertemperature(seeFigure1) NOTEThedefinitionof mand tassumesthatthefunctiongivingthelengthvariationinrelationtothetemperature variationiscontinuous.Thisexcludesthe

25、useofthemeancoefficientoflinearthermalexpansion mwhenthetest specimenexperiencesphysicalchangeduetochangeofphase,eg.recrystallisationorlossofwaterofhydration. Thecurvegivingthelengthvariationasafunctionofthetemperaturevariationcanbereportedbutthemean coefficientofthermalexpansionshouldnotbecalculate

26、dforpartsofthecurvewhicharenotcontinuous.EN13471:2001(E) 5 Key a Temperature 1 ThemeancoefficientofthermalexpansionbetweenT1andT2isillustratedbythegradientofthe dottedlinebetweenthepointsAandB 2 ThecoefficientofthermalexpansionatTisillustratedbythegradientofthetangentatpointC Figure1Therelativelengt

27、hvariationasafunctionoftemperature 4Principle Thechangesofaproductslineardimensions,asitstemperatureischanged,aremeasuredand characterised.Itshallbedoneinacontinuouswaywhenthefullcurveoveratemperaturerangeisneeded oronlyattwospecifiedtemperaturesifonlyameancoefficientoflinearthermalexpansionbetweent

28、hese temperaturesisneeded. 5Apparatus 5.1Dilatometer Anydilatometerwithappropriatedimensionsandsuitableforthetemperaturerange(seeFigure2). NOTETheusualdilatometersareofthetubeorrodtype,fabricatedofhighpurityvitreoussilica.Moderndilatometers incorporatetheessentialfeaturesdescribedbelow. 5.2Micromete

29、rcaliper Acaliperwithmicrometerindicationpermittingdirectreadingofthetestspecimenlengthsatdifferent temperatures.TheaccuracyofthesemeasurementsshallbesuchthatconsecutivemeasurementsattheEN13471:2001(E) 6 sametemperaturearedeterminedto2 10 4 l 0 forthelengthandto2 10 5 l 0 forthelengthvariations. 5.3

30、Electricalfurnace Forhightemperatures,anelectricalfurnace,capableofmaintainingthemeantemperatureofthetest specimentowithin2Kofthedesiredtesttemperatureandthemaximumandminimumtemperatureofthe testspecimentowithin2K. Theelectricalfurnaceshallbecapableoflimitingtherateoftemperaturechangeto1 C/minduring

31、the changefromonetesttemperaturetoanother. 5.4Testchamber Forlowandcryogenictemperatures,atestchamber,capableofmaintainingthemeantemperatureofthe testspecimentowithin1Kofthedesiredtesttemperatureandthemaximumandminimumtempera tureofthetestspecimentowithin1K. Thetestchambershallbecapableoflimitingthe

32、rateoftemperaturechangeto1 C/minduringthe changefromonetesttemperaturetoanother. 5.5Temperaturemeasuringinstruments Calibratedthermocouplessuitableforthetemperatureneededforthetestwithanaccuracyof0,5K from196 Cto+200 C,1Kfrom200 Cto500 Cand2Kfrom500 Cto850 C. Thethermocouplesareconnectedtoacontinous

33、recordingdevice.Ifonlythemeancoefficientoflinear thermalexpansion m betweentwotemperaturesisneeded,themeasurementsshallonlybecarriedout atthesetemperatures. NOTEDeviceswhicharenormallyusedforthesimultaneousrecordingofthelengthvariationandthetemperature, provideacurveof l 0 asafunctionof T2 T1.EN1347

34、1:2001(E) 7 5.6Equipmenttopreparethetestspecimen Suitablesaworthinwalledsteeltubetopreparethetestspecimen. Key 1Micrometerscrew 2Thermostat 3Pushrod 4Protectivetube 5Furnace 6Testspecimen 7Linearvariabledifferentialtransducer 8Testspecimencarrier 9Thermocouple Figure2Typicalexampleofadilatometer 6Te

35、stspecimens 6.1Dimensionsoftestspecimens Thedimensionsshallbeappropriateforthedimensionsofthedilatometerandsuitableforthetest material. Dimensionsofthetestspecimensshallbeasspecifiedintherelevantproductstandard. NOTE1Intheabsenceofaproductstandardthedimensionsoftestspecimensmaybeagreedbetweenparties

36、. NOTE2Typicaltestspecimenshavealengthof(501)mmwithsquarecrosssectionof(101)mmora diameterof(101)mm.Smallerorlargerdimensionsareacceptable,buttheuserofthestandardshouldbeaware thattooshorttestspecimensgivealossofsensitivitywhiletoolongtestspecimensmaybesubjectedtoaxial temperaturedifferencesorphysic

37、aldeformationsuchascreeporelasticstrainrates. ThetoleranceonparallelismandflatnessbetweenthetwofacesofthetestspecimenusedforthelengthEN13471:2001(E) 8 determinationshallnotbemorethan1%oftheirlineardimension. 6.2Preparationoftestspecimens Anyskins,facingsand/orcoatingsshallberemoved. Testspecimenssha

38、llbesawnorcutwithathinwalledsteeltubefromtheproductinthedirectionin whichthemeasurementofthecoefficientoflinearthermalexpansionshallbemadeandinwhichthe lineardimensionsaretoberecorded. Specialrequirementsforpreparationsuchasannealingordryingunderspecifiedconditionsshallbe indicatedwhererelevantinthe

39、productstandard. Foranisotropicproductsthemeasurementsshallbecarriedoutbothinthedirectionofthelengthandof thewidth. 6.3Numberoftestspecimens Thenumberoftestspecimensshallbeasspecifiedintherelevantproductstandard.Ifthenumberisnot specified,thenatleasttwotestspecimensshallbeused. NOTEIntheabsenceofapr

40、oductstandardoranyotherEuropeantechnincalspecificationthenumberoftest specimenmaybeagreedbetweenparties. 6.4Conditioningoftestspecimens Thetestspecimensshallbestoredforatleast6hat(235) C.Incaseofdisputetheyshallbestoredat (232) Cand(505)%relativehumidityforthetimespecifiedintherelevantproductstandar

41、d. 7Procedure 7.1Testconditions Thetestshallbestartedat(232) C,duetotheimportanceofaccuratetemperaturesforthistest method. 7.2Testprocedure Cleanthetestspecimenandinstallitinthedilatometermakingsurethattheendsurfacesaswellasthe contactsurfacesofthedilatometerarefreeofforeignparticles. Measureitsleng

42、that(232) Cwhichshallbeconsideredasthereferencetemperature. Placethethermocouplesinrepresentativemannerensuringgoodcontactwiththetestspecimen. Insertthedilatometerassemblyinthefurnaceorinthetestchamber. Heatorcoolthesystem,makingsurethatthetemperaturegradientgivenintherelevantproductstandard isrespe

43、cted.Ifnoinformationisavailable,donotexceed3K/minand1K/minforthelast50 Cinterval. Stabilizethetemperatureattemperatureintervalsnotgreaterthan50 Coveratimesufficienttoobtain homogeneoustemperaturewithinthetestspecimen.Usually30minissufficient. Measurethetemperatureandthetestspecimenlengthwhenconstanttemperatureisrecorded(2Kfor hightemperatureand1Kforlowtemperature).Recordthelengthvariation/temperaturecurves continuously,followingtheinstruct