C 533 – 07

StandardSpecificationfor

CalciumSilicateBlockandPipeThermalInsulation1ThisstandardisissuedunderthefixeddesignationC533;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.

1.Scope

1.1Thisspecificationcoverscalciumsilicateblockandpipethermalinsulationforuseonsurfaceswithtemperaturesbetween80and1700°F(27to927°C),unlessotherwiseagreeduponbetweenthemanufacturerandthepurchaser.

1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.

1.3Thefollowingsafetyhazardscaveatpertainsonlytothetestmethod(Section12)describedinthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.

2.ReferencedDocuments2.1ASTMStandards:2C165TestMethodforMeasuringCompressivePropertiesofThermalInsulations

C168TerminologyRelatingtoThermalInsulation

C177TestMethodforSteady-StateHeatFluxMeasure-mentsandThermalTransmissionPropertiesbyMeansoftheGuarded-Hot-PlateApparatus

C203TestMethodsforBreakingLoadandFlexuralProp-ertiesofBlock-TypeThermalInsulation

C302TestMethodforDensityandDimensionsofPre-formedPipe-Covering-TypeThermalInsulation

C303TestMethodforDimensionsandDensityofPre-formedBlockandBoard−TypeThermalInsulation

C335TestMethodforSteady-StateHeatTransferProper-tiesofPipeInsulation

C356TestMethodforLinearShrinkageofPreformed

High-TemperatureThermalInsulationSubjectedtoSoak-ingHeat

C390PracticeforSamplingandAcceptanceofThermalInsulationLots

C411TestMethodforHot-SurfacePerformanceofHigh-TemperatureThermalInsulation

C421TestMethodforTumblingFriabilityofPreformedBlock-TypeThermalInsulation

C446TestMethodforBreakingLoadandCalculatedModulusofRuptureofPreformedInsulationforPipes3C450PracticeforFabricationofThermalInsulatingFittingCoversforNPSPiping,andVesselLagging

C518TestMethodforSteady-StateThermalTransmissionPropertiesbyMeansoftheHeatFlowMeterApparatusC585PracticeforInnerandOuterDiametersofRigidThermalInsulationforNominalSizesofPipeandTubing(NPSSystem)

C795SpecificationforThermalInsulationforUseinCon-tactwithAusteniticStainlessSteel

C870PracticeforConditioningofThermalInsulatingMa-terials

C1045PracticeforCalculatingThermalTransmissionPropertiesUnderSteady-StateConditions

C1058PracticeforSelectingTemperaturesforEvaluatingandReportingThermalPropertiesofThermalInsulationC1114TestMethodforSteady-StateThermalTransmissionPropertiesbyMeansoftheThin-HeaterApparatus

C1616TestMethodforDeterminingtheMoistureContentofInorganicInsulationMaterialsbyWeight

E84TestMethodforSurfaceBurningCharacteristicsofBuildingMaterials

3.Terminology

3.1Definitions—Fordefinitionsusedinthisspecification,seeTerminologyC168.

4.Classification

4.1Thermalinsulationshallbeofthefollowingtypes:4.1.1TypeI—Blockforuseonsurfacesattemperaturefrom140°F(60°C)toto1200°F(649°C).

ThisspecificationisunderthejurisdictionofASTMCommitteeC16onThermalInsulationandisthedirectresponsibilityofSubcommitteeC16.20onHomogeneousInorganicThermalInsulations.

CurrenteditionapprovedMarch1,2007.PublishedMarch2007.Originallyapprovedin1964toreplaceC344andC345.Lastpreviouseditionapprovedin2004asC533–04.2ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.

13Withdrawn.

Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.

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C533–07

4.1.2TypeI—Pipeforuseonsurfacesattemperaturefrom140°F(60°C)toto1200°F(649°C).

4.1.3TypeIA—Blockforuseonsurfacesattemperaturesfrom140°F(60°C)toto1200°F(649°C).

4.1.4TypeII—Blockforuseonsurfacesattemperaturesfrom140°F(60°C)to1700°F(927°C).

5.Description

5.1Composition—Calciumsilicatethermalinsulationshallconsistprincipallyofhydrouscalciumsilicateusuallywiththeincorporationoffibrousreinforcement.Asbestosshallnotbeusedasacomponentinthemanufactureofthematerial.6.PhysicalRequirements

6.1Theinsulationshallconformtothephysicalrequire-mentsofTable1.

7.StandardShapes,Sizes,andDimensions

7.1Calciumsilicateblock-typethermalinsulationshallbesuppliedintheformofpipeinsulation,flatblockorcurvedblocksasspecified.Standardsizesoftheblocktypeinsulationshallbeasfollows:

7.1.1FlatBlock—Flatblockshallbefurnishedinlengthsof36in.(458or914mm),widthsof6to36in.(152to914mm),andthicknessesfrom1to6in.(25to152mm)in1⁄2-in.

(13-mm)increments.Thicknessesgreaterthan3in.(76mm)shallbefurnishedinoneormorelayersasagreeduponbypurchaserandmanufacturer.

7.1.2CurvedBlock—Curvedblockshallbefurnishedinlengthsof36in.(914mm),widthsofapproximately6to12in.(152or305mm),thicknessesof11⁄2to4in.(38to101mm)in1⁄2-in.(13-mm)increments,andcurvedtoinsideradiiofover161⁄2in.(419mm).Individualdimensionsshallconformtothosespecifiedbythemanufacturer.

7.1.3GroovedBlock—Groovedblockshallbefurnishedinlengthsof36in.(914mm),widthsof12or18in.(305or458mm),andthicknessesfrom1to6in.(25to152mm)in1⁄2-in.(13-mm)increments.Sizeandspacingofgroovesshallbeasspecifiedbythemanufacturer.

7.2CalciumSilicatePipeInsulation—Calciumsilicatepipeinsulationshallbesuppliedeitherashollowcylindricalshapessplitinhalflengthwise(inaplaneincludingthecylindricalaxis)orascurvedsegments.Thepipeinsulationshallbefurnishedinsectionsorsegmentsinalengthof36in.(914mm),unlessotherwiseagreeduponbythePurchaser,tofitstandardsizesofpipeandtubing,andinnominalwallthicknessesfrom1to6in.(25to152mm),in1⁄2in.(13mm)increments.Thicknessesgreaterthan3in.(76mm)shallbefurnishedinoneormorelayersasagreeduponbybetweenthepurchaserandthemanufacturer.Innerandouterdiameters

TABLE1PhysicalRequirements

NOTE1—Thephysicalrequirementsarebasedonthepropertiesofsamplesdriedorconditioned,orboth,asspecifiedinthereferencedtestmethods.Calciumsilicateinsulationtendstoabsorbmoisturetovaryingdegreesdependingonexposureconditions.Itcanabsorbupto4timesitsdryweightifplacedindirectcontactwithwaterthroughimproperstorageorapplication.

NOTE2—Theuserisadvisedthatsomeapplicationscouldrequiretheknowledgeofthethermalconductivityoftheinsulationmaterialatmeantemperaturesabovethoseshown.Consultthemanufacturerfordataatmeantemperaturesexceedingthoselisted.

TypeI

Usetemperature,max,°F(°C)Density(dry),max,lb/ft3(kg/m3)Flexuralstrength,min,psi(kPa)

Compressivestrength,min,at5%deformation,psi(kPa)Masslossbytumbling,max,%afterfirst10minutesaftersecond10minutes

Soakingheatlinearshrinkage,max,%Hotsurfaceperformance:warpage,max,in.(mm)cracking

ApparentthermalconductivityA(seeNote2)Btu-in./h-ft2-°F(W/m-K)maxatmeantemperatureof:100°F(38°C)200°F(93°C)300°F(149°C)400°F(204°C)500°F(260°C)600°F(316°C)700°F(371°C)800°F(427°C)900°F(482°C)1000°F(538°C)

Surfaceburningcharacteristics:Flamespreadindex,maxSmokedensityindex,max

Moisturecontent,byweight,max%

ATypeI

Pipe

1200(649)15(240)50(344)

TypeIA

Block

1200(649)22(352)50(344)100(688)20402

TypeII

Block

1700(927)22(352)50(344)100(688)20402

Block

1200(649)15(240)50(344)100(688)20402

1420402

1⁄4(6)1⁄4(6)1⁄4(6)⁄(6)

Nocrackscompletelythroughtheinsulationthickness.Surfacecracksonhotfaceareacceptable

0.41(0.059)0.45(0.065)0.50(0.072)0.55(0.079)0.60(0.087)0.66(0.095)0.71(0.102).........0020

0.41(0.059)0.45(0.065)0.50(0.072)0.55(0.079)0.60(0.087)0.66(0.095)0.71(0.102)0.50(0.072)0.54(0.078)0.58(0.084)0.61(0.088)0.64(0.092)0.67(0.097)0.70(0.101)

0.50(0.072)0.54(0.078)0.58(0.084)0.61(0.088)0.64(0.092)0.67(0.097)0.70(0.101)0.73(0.105)0.75(0.108)0.77(0.111)0020

00200020

Thethermaltransmissionpropertiesofcalciumsilicateblockandpipeinsulationvarywithtemperature,temperaturegradient,moisturecontent,thickness,andshape.Notethattheapparentthermalconductivityrequirementsinthetablearebasedonsamplestestedundertheconditionsspecifiedin12.1.2.Thesearecomparativevaluesforestablishingspecificationcompliance.Theydonotrepresenttheinstalledperformanceoftheinsulationunderuseconditionsdifferingsubstantiallyfromthetestconditions.

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C533–07

shallbeinaccordancewiththosestandarddimensionsspeci-fiedinPracticeC585.

NOTE1—Whenmultilayersectionalpipeinsulationisrequired,itisnecessarytoconsidertheinsideandoutsidediametersofeachlayertoensurepropernestingofmaterialswheninstalled.Necessityoffurnishingmultilayerpipeinsulationnestedfromthemanufacturershallbebasedonmanufacturer’sabilitytocontroloutsidediametersoninnerlayerstonotgreaterthaninsidediameters,atminustolerances,ofnestingouterlayerundernormalproduction,asagreedtobetweenpurchaserandmanufac-turer.

11.1.311.1.411.1.511.1.611.1.711.1.8Masslossbytumbling.

Linearshrinkageaftersoakingheat.Hotsurfaceperformance.

Apparentthermalconductivity.Surfaceburningcharacteristics.Moisturecontent.

12.TestMethods

12.1Thepropertiesenumeratedinthisspecificationshallbedeterminedinaccordancewiththefollowingtestmethods.SamplesshallbepreconditionedinaccordancewithPracticeC870.

12.1.1DensityandDimensions:

12.1.1.1BlockInsulation—TestMethodC303.12.1.1.2PipeInsulation—TestMethodC302.12.1.2ApparentThermalConductivity:

12.1.2.1General—ApparentthermalconductivityversusmeantemperatureshallbecalculatedinaccordancewithPracticeC1045.Determinationsshallbemadeatfourormoremeantemperatures.Twoofthetestmeantemperaturesshallbewithin50°F(28°C)ofthehighestandlowestmeantemperaturespecifiedinTable1fortheappropriatematerialtype.Theothertwodeterminationsshallbemadeatmeantemperaturesspacedequallywithinthespecifiedrange.AlltesttemperaturesshallbeselectedinaccordancewithPracticeC1058andreportedinthetestresults.

12.1.2.2Theresultsofthesetestsshallbeinterpolatedthroughreasonablecurvefittingornumericaltechniques,toestablishtheapparentthermalconductivityatthespecifiedmeantemperature.

12.1.2.3BlockInsulation—TestMethodsC177,C518,orC1114using11⁄261⁄2in.(38613mm)thickspecimensofblockinsulation.

12.1.2.4PipeInsulation—TestMethodC335using11⁄261⁄2in.(38613mm)thickspecimensofpipeinsulationassuppliedforafitto3in.nominalironpipe.

12.1.3LinearShrinkageAfterHeatSoaking—TestMethodC356.Thetesttemperatureshallbeasspecifiedin4.1.12.1.4FlexuralStrength:

12.1.4.1BlockInsulation—TestMethodsC203.12.1.4.2PipeInsulation—TestMethodC446.

12.1.5CompressiveStrength(BlockInsulationOnly)—TestMethodC165,ProcedureA.

12.1.6MassLossbyTumbling—TestMethodC421.

12.1.7HotSurfacePerformance—TestMethodC411.Thetesttemperatureshallbethatspecifiedin4.1orthemanufac-turer’srecommendedtemperaturelimit,whicheverishigher.Thethicknessofthespecimenshallbethemanufacturer’srecommendedthicknessforthetesttemperature.

12.1.8SurfaceBurningCharacteristics—TestMethodE84.12.1.9StressCorrosionPerformance—Ifrequestedbythepurchaser,testaccordingtothetestmethodinSpecificationC795.

12.1.10MoistureContentByDryWeight:SeeTestMethodC1616.

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8.DimensionalTolerances

8.1General—Theaveragetolerancesforlength,width,andthicknessshallbeasfollowing:

LengthWidthThickness

InnerDiameterOuterDiameter

Block

61⁄8in.(3mm)61⁄8in.(3mm)61⁄8in.(3mm)

Pipe

61⁄8in.(3mm)

inaccordancewithPracticeC585inaccordancewithPracticeC585

8.2PipeInsulation—Thefollowingadditionaldimensionaltolerancesapplyonlytocalciumsilicatepipeinsulationsup-pliedashalfsections.

8.2.1FitandClosure—Whenfittedtotheappropriatesizepipebybandingon9-in.(229-mm)centers,thelongitudinalseamsonbothsidesofthepipeinsulationshallclosetowithin1⁄16in.(2mm)alongtheentirelengthofthesection.

8.2.2Concentricity—Theinnerboreofthepipeinsulationshallbeconcentricwiththeoutercylindricalsurface.Thedeviationfromconcentricityshallnotexceed1⁄8in.(3mm)or5%ofthewallthickness,whicheverisgreater.

8.2.3Half-SectionBalance—Theplaneformedbytheslitbetweenhalfsectionsshallincludethecylindricalaxis.Devia-tionoftheslitplanefromthecylindricalaxisovera36-in.(914-mm)lengthshallnotexceed1⁄8in.(3mm).

8.3GroovedBlock—Thefollowingadditionalrequirementsapplyonlytocalciumsilicateblockinsulationcontaininggroovesandintendedforinstallationovercurvedsurfaces,20in.(508mm)indiameteroflarger.

8.3.1FitandClosure—Whenfittedtothecurvedsurface,thegroovesshallcloseto1⁄8in.(3mm)orlessthroughthedepthofthegroove.Theexposedsurfacecrackshallnotopenmorethan1⁄8in.(3mm).

9.Workmanship

9.1Sincesomerequirementsforthismaterialarenoteasilydefinedbyanumericalvalue,theinsulationshallnothavevisibledefectsthatwilladverselyaffectitsservicequalities.10.Sampling

10.1TheinsulationshallbesampledinaccordancewithPracticeC390.Specificprovisionforsamplingshallbeagreeduponbetweenthepurchaserandthesupplieraspartofthepurchasecontract.

11.QualificationRequirements

11.1Thefollowingrequirementsaregenerallyemployedforpurposeofinitialmaterialorproductqualification:11.1.1Flexuralstrength.11.1.2Compressionstrength.

C533–07

13.Inspection

13.1Thefollowingrequirementsaregenerallyemployedforpurposesofacceptancesamplingoflotsorshipmentsofqualifiedcalciumsilicateinsulation:13.1.1Density,

13.1.2Dimensionaltolerances,and13.1.3Workmanship.

14.Rejection

14.1Failuretoconformtotherequirementsinthisspecifi-cationshallconstitutecauseforrejection.Rejectionshallbereportedtothemanufacturerorthesellerpromptlyandinwriting.Themanufacturerandsupplierhavetherighttoverifytherejectedproducts.

15.Certification

15.1Whenspecifiedinthepurchaserorderorcontract,aproducer’sorsupplier’scertificationshallbefurnishedtothepurchaserthatthematerialwasmanufactured,sampled,tested,orinspectedinaccordancewiththisspecificationandhasbeenfoundtomeettherequirements.Whenspecifiedinthepur-chaseorderorcontract,areportofthetestresultsshallbefurnished.

16.PackagingandMarking

16.1Packaging—Materialshallbepackagedtoaffordpro-tectionagainstdeteriorationanddamageduringshipmentfrom

themanufacturertotheinitialdestination.Unlessotherwiseagreeduponorspecifiedbetweenthepurchaserandmanufac-turerorsupplier,materialshallbepackagedincontainerssuppliedbythemanufacturerandcommonlyusedforthispurpose.Shippingcontainersshallcomplywiththeregulationsapplicabletothemodeoftransportation.

16.2Marking—Unlessotherwisespecified,eachcontainershallbeplainlymarkedwiththemanufacturer’sname,address,telephonenumber,productname,type,quantityofinsulation,nominaldimensions,andjackettypeandaccessories,ifany,ofthematerialinthecontainer.

17.OrderingInformation

17.1Purchaseordersforcalciumsilicateinsulationfur-nishedtothisspecificationshallincludethefollowinginfor-mation:

17.1.1Type(see4.1)

17.1.2Shape,SizeandDimensions,(seeSection7)and,17.1.3Doublelayer,(ifrequired).

17.2Anyspecialrequirements,suchas,inspectionrequire-mentsinaccordancewithSection13,orcertificationrequire-mentsinaccordancewithSection15shallbeagreeduponbetweenthepurchaserandthesupplierandstatedinthepurchasecontract.

18.Keywords

18.1blockandpipethermalinsulation;calciumsilicate;thermalconductivity;thermalinsulation

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