GroupstandardTL52316

Issue2022-10

Class.No.:55165

Descriptors:EPDM,EPDMseal,FKM,HNBR,coolantpump,coolantsystem,heatexchanger,radiator,seal,sealingring

SealsintheCoolantSystem

MaterialsRequirements

3Types:A,B,C

Previousissues

TL52316:1989-07,1999-12,2004-06,2011-02,2014-04,2017-07

Changes

ThefollowingchangeshavebeenmadetoTL52316:2017-07:

a)Standardtitlechangedanddescriptorsrevised

b)

Section1?Scope“

revised

c)

Section?General

3.1requirements“expanded

d)

Section?Types“

3.2revised

e)

Section?Material“

3.5expanded

f)

Section?Properties“

3.6:Examplesexpanded

g)

Section?Requirements

3.8fortheproperties“:Requirementsexpanded

h)

Table1

:Agingdurationchangedfrom1000hto1008h;footnotesforreducedtestscopeexpanded

i)

Tableconsec.no.

1,9:RequirementsforTgandTR10valueexpanded

j)

Table2

?Additionallow-temperatureproperties“added

k)

Section4.2?Heat

aging“:Noteonpointintimeofmeasurementspecifiedingreaterdetail

l)

Section?Agingin

4.3coolant“and

Section4.4?Coolantin

agingvapor“:Noteonpointintimeofmeasurementandblottingoffluidresiduesspecifiedingreaterdetail

m)Standardedited

n)Section"Applicabledocuments"updated

Alwaysusethelatestversionofthisstandard.

Thiselectronicallygeneratedstandardisauthenticandvalidwithoutsignature.Acommaisusedasthedecimalsign.TheEnglishtranslationisbelievedtobeaccurate.Incaseofdiscrepancies,theGermanversioncontrols.

Page1of10

Allrightsreserved.NopartofthisdocumentmaybeprovidedtothirdpartiesorreproducedwithoutthepriorconsentofoneoftheVolkswagenGroup’sStandardsdepartments.|internal

?VolkswagenAktiengesellschaft

VWNORM-2021-11

Page2

TL52316:2022-10

Contents

Page

1

Scope

2

2

Designation

2

3

Requirements

3

3.1

Generalrequirements

3

3.2

Types

3

3.3

Color

3

3.4

Evaluationmeasurement

oftheresults

3

3.5

Material

3

3.6

Properties

3

3.7

MarkingasperGermanAssociationAutomotive

oftheIndustry(VDA)

publicationVDA260

4

3.8

Requirements

fortheproperties

4

4

Noteson

testing

8

4.1

Specimens

8

4.2

Heat

aging

8

4.3

Agingin

coolant

8

4.4

Coolantinvapor

aging

8

4.5

Cold-airbehavior

9

5

Applicable

documents

9

1Scope

Thisstandarddefinesthematerialsrequirementsforseals/sealingringsinthecoolantsystemforthefollowingtemperatureranges:

-35°Cto110°CQuasistaticsealsundermoderateuseconditions,suchassealsforradia-tors,o-rings,etc.,exclusivelyinthecoolantcircuitofpurelyelectricallypoweredvehicles

-35°Cto135°CQuasistaticsealsundermoderateuseconditions,suchassealsforradia-torsando-ringsinadaptersandquickcouplingspositionedawayfromtheengine

-35°Cto150°CApplicationspositionedclosetotheengineandexposedtohighstresses,suchassealsincoolantpumps,inelectricthermostathousingmodules,inthermalmanagementmodules,inthermostats

2Designation

ExampledesignationfortypeB,forthetemperaturerange-35°Cto110°C:

EPDMsealasperTL52316-B一temperature-resistantupto110°C

ExampledesignationfortypeB,forthetemperaturerange-35°Cto135°C:

EPDMsealasperTL52316-B一temperature-resistantupto135°C

ExampledesignationfortypeB,forthetemperaturerange-35°Cto150°C:

EPDMsealasperTL52316-B一temperature-resistantupto150°C

Page3TL52316:2022-10

3Requirements

3.1Generalrequirements

RequirementsforsuppliersofsealingmaterialsasperVolkswagenstandard

VW01153

.Approvaloffirstsupplyandchangesasper

VW01155

.

Materialsqualityverificationasper

VW52000

Theenvironmentalrequirementsspecifiedin

VW91100

mustbemet.

Materialconformityasper

VW91101

.

Ifthetemperaturerangeisnotindicatedinthedrawingintheformoftheexampledesignation

specifiedabove(see

section2

),thenthetemperaturerequirement/temperaturerangeof-35°Cto135°Cappliesasstandard.

Ifthereducedrequirementsforsealsinthecoolantcircuitofpurelyelectricallypoweredvehiclesorforhighlystressed,close-coupledapplicationsarenecessary,thenthesemustbeexplicitlystipula-tedintheformoftheexampledesignationsspecifiedabove(see

section2

).

Deviatingoradditionalrequirements/properties(e.g.,deviatingtemperaturerequirements,deviat-inghardnessranges,orthelike)mustbeagreeduponwiththepurchaser'sappropriatedepart-mentandMaterialsEngineeringdepartmentbeforehandanddocumentedinthedrawing.

3.2Types

TL52316-A

Hardnessrange(50±5)ShoreAorInternationalRubberHardnessDegree(IRHD)

TL52316-B

Hardnessrange(60±5)ShoreAorIRHD

TL52316-C

Hardnessrange(70±5)ShoreAorIRHD

Theselectionofthehardnessrangemustbeagreeduponwiththepurchaser'sappropriatedepart-mentandMaterialsEngineeringbeforehand,asneeded.

3.3Color

Black

3.4Evaluationofthemeasurementresults

Therequirednumericalvaluesapplytoeachindividualmeasurement.

3.5Material

EPDM,HNBR,FKM–Allmaterialsareperoxide-cross-linked.

Inadditiontothematerialsmentionedabove,thematerialperoxide-cross-linkedNBRcanalsobeusedexclusivelyforthetemperaturerangeof-35°Cto110°C.

3.6Properties

Finishedpartsmustbeflawlesslyvulcanizedthroughthefinalstage,haveacleansurface,andbefreeofflawscausedbymanufacturing,suchasblistersandinclusionsintherubber.

Page4

TL52316:2022-10

3.7MarkingasperGermanAssociationoftheAutomotiveIndustry(VDA)publication

VDA260

>EPDM<;>HNBR<;>FKM<;>NBR<

3.8Requirementsfortheproperties

Therequirementsforthepropertiesmustbetakenfrom

table1

.Thespecimengeometriestobeusedmustbetakenfrom

section4.1

.

Separaterequirementsintermsoflow-temperaturebehaviorapplytosealsinelectriccomponents,suchasthecharger,electricmachine,high-voltagebattery,etc.,whicharesubjecttoextendedre-quirementsintermsoftemperaturecycleproperties(temperaturecycletest/thermalshocktest).

Theserequirementscanbetakenfrom

table2

.

TheuseofEPDMispreferredifthepartonlycomesintocontactwithcoolant,whiletheuseof

HNBRispreferredifthepartcomesintocontactwithbothcoolantandamineral-oil-basedmedium(e.g.,oil).

Theteststobeperformed,inthecontextofpresentingnewmaterials/mixtures/compoundsthatarepreviouslyunknownforthisapplication,mustbeperformedbothonstandardspecimenssampledfromtestpanelsandonareferenceo-ring.Thedimensionsofthereferenceo-ringmustbeagreeduponbeforehandwiththepurchaser'sMaterialsEngineeringdepartment.ThesurfacehardnessinIRHDmeasuredonthefinishedpartcandeviatemoderatelyfromthestandardspecification.Thedeviationsmustbeagreeduponwiththepurchaser'sMaterialsEngineeringdepartmentand,ifap-plicable,addedtothedrawing.

Inthecontextofpresenting(new)materials/mixtures/compoundsthatarepreviouslyunknownforthisapplication,thelow-temperaturecharacteristicsofglasstransitiontemperature(Tg)asper

DINENISO

11357-2andtemperatureretraction(TR10)valueasper

ISO2921

mustalwaysbeprovided.

Inthecontextofbasicdevelopmentorpresentationofnewmixtures/compounds/materialsthatarepreviouslyunknownforthisapplication,andforre-qualifications/re-validations,themechanical

characteristicsmustbedeterminedafterheataging,intheliquidphaseandinthevaporphase.Ifknownmaterialsforthisapplicationarebeingused,thenonlyareducedtestscopeisrequiredforbuildsampleinspectionorinitialsampleinspectionofthefinishedpart,whichismarkedwithfootnotea)inthe?No.“columnoftable

table1

.Detailedinformationonalready-knownmaterialsmustberequestedfromtheappropriateMaterialsEngineeringdepartment.

Theentry??≤x%“in

table1

isusedtospecifythepermissiblerelativechangeof?-x%to+x%“incomparisonwiththeas-receivedcondition.

Page5TL52316:2022-10

Table1–Requirementsfortheproperties

No.

Property

Unit

Requirement

TL52316-A

TL52316-B

TL52316-C

1

Thermogravimetry

asperTestStandard

PV3927

Aspersample

2

Density

asper

VW2.8.1

g/cm3

Aspersample

3

Hardnessasper

DINISO

48-4or

DINISO

48-2(methodM)

3.1

a)

As-receivedcondition

ShoreA

or

IRHD

50±5

60±5

70±5

3.2

Afterheataging;see

section4.2

94h

ShoreA

or

IRHD

0to+6

comparedtoas-receivedcondition

504hand1008h

ShoreA

or

IRHD

0to10

comparedtoas-receivedcondition

3.3

Aftercoolantaginginliquidandinvapor;see

section4.3

and

section4.4

94h

ShoreA

or

IRHD

-5to+5

comparedtoas-receivedcondition

504hand1008h

ShoreA

or

IRHD

-5to+5

comparedtoas-receivedcondition

-8to+8

comparedtoas-

receivedcondi-

tion

4

Tensilestrengthasper

DIN53504

or

PV3973

(foro-rings)

4.1

a)

As-receivedcondition

N/mm2

≥12

4.2

Afterheataging;see

section4.2

94h,504h,and1008h

N/mm2

Δ≤30%

comparedtoas-receivedcondition

4.3

Aftercoolantaginginliquidandinvapor;see

section4.3

and

section4.4

94hand504h

N/mm2

Δ≤30%

comparedtoas-receivedcondition

1008h

N/mm2

Δ≤30%

comparedtoas-receivedcondition

Δ≤35%

comparedtoas-

receivedcondi-

tion

5

Elongationattearasper

DIN53504

or

PV3973

(foro-rings)

5.1

a)

As-receivedcondition

%

≥200

Page6

TL52316:2022-10

Table1(continued)

No.

Property

Unit

Requirement

TL52316-A

TL52316-B

TL52316-C

5.2

Afterheataging;see

section4.2

94h

%

Δ≤30%

comparedtoas-receivedcondition

504h

%

Δ≤40%

comparedtoas-receivedcondition

1008h

%

≥120

5.3

Aftercoolantaginginliquidandinvapor;see

section4.3

and

section4.4

94h,504h,and1008h

%

Δ≤25%

comparedtoas-receivedcondition

6

Stressvalueasper

DIN53504

at100%elongation,or

PV3973

(foro-rings)

6.1

a)

As-receivedcondition

N/mm2

≥1,2

≥2,0

≥3,0

6.2

Afterheataging;see

section4.2

94h,504h,and1008h

N/mm2

≥1,2

≥2,0

≥3,0

6.3

Aftercoolantaginginliquidandinvapor;see

section4.3

and

section4.4

94h,504h,and1008h

N/mm2

≥1,0

≥2,0

≥3,0

7

Changeinweight

7.1

Aftercoolantaginginliquidandinvapor;see

section4.3

and

section4.4

94h

%

0to+6,0

504h

%

1008h

%

0to+6,0

0to+7,5

8

a)

Plasticdeformationafterheataging(22hat110°C,135°C,or150°C)

8.1

Asper

PV3307

50%deformation

%

≤60

8.2

Asper

PV3330

40%deformation

%

≤50

9

Low-temperaturebehavior

9.1

Behaviorincoldair;see

section4.5

;

22hat-35°C

Nocracks,nofractures

9.2

Glasstransitiontemperature(Tg)asper

DINENISO

11357-2

°C

Aspersample

9.3

TR10value

asper

ISO2921

°C

Aspersample

10

Corrosionpropertiesasper

VW2.8.1

Noblackdiscoloration,noaggressivebehavioronelectrolyticcopper;slightoxidationtintpermissible

11

Tearpropagationresistanceasper

DINISO

34-1,methodA(trouserspecimen)

11.1

As-receivedcondition

N/mm

≥4,0fordynamicseals≥3,0forstaticseals

Page7TL52316:2022-10

Table1(continued)

No.

Property

Unit

Requirement

TL52316-A

TL52316-B

TL52316-C

11.2

Afterheataging;see

section4.2

94h,504h,and1008h

N/mm

≥3,0fordynamicseals≥2,0forstaticseals

11.3

Aftercoolantaginginliquidandinvapor;see

section4.3

and

section4.4

94h,504h,and1008h

N/mm

≥3,0fordynamicseals≥2,0forstaticseals

12

Resistancetoengineoil:

AppliestoHNBRandFKM,onlyifrequiredinthedrawing,

testingasper

VW2.8.1

,section?Agingincontactmedia?oil,“at100°C

Requirementasper

VW2.8.1

,qualityC

13

Resistancetogasoline:

AppliestoHNBRandFKM,onlyifrequiredinthedrawing,

testingasper

VW2.8.1

,section?Agingincontactmedia?gasoline“

Requirementasper

VW2.8.1

,qualityW

14

Resistancetodieselfuel:

AppliestoHNBRandFKM,

onlyifrequiredinthedrawing,

testingasper

VW2.8.1

,section?Agingincontactmedia?dieselfuel,fattyacidmeth-ylester(FAME)“

Requirementasper

VW2.8.1

,qualityT

15

Volumeresistivity

asper

DINEN62631-3-1

(testvoltage10V,specimenthickness2mm)

Ω×cm

≥1×104

a)Thisisrequiredinthereducedtestscopeforknownmaterials.

Table2–Additionallow-temperatureproperties

No.

Property

Unit

Requirement

TL52316-A

TL52316-B

TL52316-C

1

GlasstransitiontemperatureTgasper

DINENISO

11357-2

1.1

EPDM

°C

≤-50

1.2

HNBR

°C

≤-30

2

TR10valueasper

ISO2921

2.1

EPDM

°C

≤-44

2.2

HNBR

°C

≤-30

Page8

TL52316:2022-10

4Notesontesting

4.1Specimens

TestsareperformedonS3Adumb-bellspecimensasper

DIN53504

,sampledfromthefinishedparts.

Inthecaseofsuitablefinished-partdimensions,S3dumb-bellspecimensasper

DIN53504

arealsopermittedtobeused.

Inexceptionalcases,ifstandardtestspecimenscannotbeextractedfromthefinishedpartsby

meansof,forexample,abandknifesplittingmachine,testplates(thickness2mm)maybeused.Fortestsonpanelmaterial,thedegreeofvulcanizationofthefinishedpartsmustalwaysbeveri-fiedbymeansofthecompressionset(comparisonofvulcanizationstateofthepanelrelativetothefinishedpart).

O-ringsandsealingringsmustbetestedasper

PV3973

.

4.2Heataging

Dumb-bellspecimens,o-rings,orsealingringsareagedinaforced-airovenasper

DIN53508

at110°C,135°C,or150°Casperdrawingspecificationsordependingonthelaterareaofuse.

Measurementsmustbetakenaftercoolingdownto(23±2)°C,butnolaterthan15minafterre-moval.

4.3Agingincoolant

Dumb-bellspecimens,o-rings,orsealingringsareagedincoolantmixture(50partsbyvolumeofdeionizedwaterand50partsbyvolumeofcoolantadditiveasperTechnicalSupplySpecification

TL774

)at110°C,135°C,or150°Cinanautoclaveasperdrawingspecificationsordependingonthelaterareaofuse.

Theliquidvolumemustbe150to180timesthespecimenvolume.Thecoolantadditivetobeusedisthefactory-fillcoolantadditiveanditmustberequestedfromthepurchaserifnecessary.

Thespecimensaresubsequentlycooleddownto(23±2)°Cinthetestmediumandmeasuredim-mediatelyafterremoval.Surfaceliquidresidues(drops,etc.)mustberemovedbyblottingthesur-facewithanabsorbentmaterialonetimebeforethemeasurement.

4.4Coolantaginginvapor

Dumb-bellspecimens,o-rings,orsealingringsareagedinthevaporphaseofcoolantmixture

(50partsbyvolumeofdeionizedwaterand50partsbyvolumeofcoolantadditiveasper

TL774

)at110°C,135°C,or150°Cinanautoclaveasperdrawingspecificationsordependingonthelaterareaofuse.

Theliquidvolumemustbe150to180timesthespecimenvolume.Thecoolantadditivetobeusedisthefactory-fillcoolantadditiveanditmustberequestedfromthepurchaserifnecessary.Simul-taneousagingwiththespecimensforliquidagingispossible.

Thespecimensaresubsequentlycooleddownto(23±2)°Cinthetestmediumandmeasuredim-mediatelyafterremoval.Surfaceliquidresidues(drops,etc.)mustberemovedbyblottingthesur-facewithanabsorbentmaterialonetimebeforethemeasurement.

Page9TL52316:2022-10

4.5Cold-airbehavior

Testspecimensmuststillbeelasticafter22hoflow-temperatureaging.Nobreakingorcrackingmustbevisibleinbendtests.Thespecimens'dimensionsmustbeapprox.100mm×15mm;devi-atingspecimensmustbeagreedupon.Glovesand/orvice-grippliersmustbeusedduringthetest.Thepartsmustbebentwithin3to5suntiltheinnersurfacesattheendstouch.O-ringsaretestedatthepart.Forthis,theringmustbecutopenbeforeagingincoldairandpreparedlikethestripspecimen.Thebendtestisperformedinandagainstthedirectionofthecurvature.Deviations

mustbeagreeduponwiththeappropriatedepartment.

Wheretheshapeofthespecimendoesnotpermitbendingbyhand,thehardnessofthespecimenmustbe<90ShoreA(measuredafteraginginacoldchamber).

Deviationsmustbeindicatedinthedrawing.

Thehardnessisdeterminedbymeansofatestdeviceconditionedatlowtemperature.

5Applicabledocuments

Thefollowingdocumentscitedinthestandardarerequiredfortheapplicationofthisstandard:

SomeoftheciteddocumentsaretranslationsfromtheGermanoriginal.ThetranslationsofGer-mantermsinsuchdocumentsmaydifferfromthoseusedinthisstandard,resultinginterminologi-calinconsistency.

StandardswhosetitlesaregiveninGermanmaybeavailableonlyinGerman.Editionsinotherlanguagesmaybeavailablefromtheinstitutionissuingthestandard.

PV3307

ElastomerComponents;PlasticandElasticDeformability

PV3330

ElastomerO-rings;CompressionSet(PlasticDeformation)

PV3927

ThermogravimetricAnalysisforPlasticsandElastomers;Determination:

Plasticizers,CarbonBlack

PV3973

ElastomerO-Rings;DeterminingTensileStrength,ElongationatTear,

andStressValuesintheTensileTest

TL774