GM6148M - Epichlorohydrin

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MaterialSpecificationRubber

GM6148M

FuelandOilResistantTubingEpichlorohydrin–Non-Reinforced1Scope

Thisspecificationcoversonetypeofnon-reinforcedflexibletubingforuseinevaporativeemissionssys-temsandvacuumsystemsandwhichisintendedtowithstandcontinuousservicetemperaturesfrom−40to+125󰀎C.Thismaterialisnotsuitableforappli-cationsinwhichitcouldbeexposedtooxidizedfueloroxidizedfuelmixtures(i.e.mapsensortubing).1.1MaterialDescription.1.1.1MaterialIdentification.

1.1.1.1Construction.Thetubingshallconsistofasinglewallofnon-bloomingepichlorohydrincopoly-mer.Tubingshallbeblack.

1.1.1.2TubeMarking.Thetubingshallbelegiblymarkedwiththefollowinginformationinthesequencestated:Nominalinsidediameterexpressedasfrac-tionofaninch(Ex.:5/32),GMspecificationnum-ber(GM6148M),datecode,tubemanufacturer’scodeidentificationasdesignatedbyRubberManufactur-ersAssociation,andthemanufacturingplantlocationcode.Suchmarkingshallbeprintedparalleltotheaxisinwhiteorlightblueblocklettersnotlessthan

3mmhighandtheopenspacebetweenthespecifiedmarkingsshallnotexceed25mm.

1.1.1.2.1Thedatecodeshallconsistofsixdigits:thefirsttwodigitsshallrepresentthemonth(01through12)oftheyear,thenexttwoshallrepresentthedayofthemonth(01through31),andthelasttwoshallbethelasttwodigitsoftheyear.

1.1.1.2.2Partsconformingtothisspecificationwhicharetooshortforthemarkingrequiredin1.1.1.2shallbemarkedasspecifiedbythepurchaser’sengineer-ingdepartment.

1.1.1.3DimensionsandTolerances.Tubingfur-nishedtothisspecificationshallconformtothedimen-sionsandtolerancesshowninTable1forthesize(nominalinsidediameter)specifiedbythepurchaser.Note:Concentricitybasedontotalindicatorreadingbetweeninsideboreofoutersurfaceoftubeshallnotexceedvaluesgivenbelow:

Sizesover6.35mm(1/4inch)upto12.70mm(1/2inch).....................1.0mmSizesover12.70mm(1/2inch)......1.3mm

OriginatingDepartment:NorthAmericanEngineeringStandards,RecordsandDocumentation

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December2000

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GM6148M

Table1:DimensionsandTolerances

Table1A–Metric(SI)Units

Size(mm)2.783.974.765.566.357.147.948.739.5311.1112.7015.8819.05

InsideDiameter

(mm)max3.184.375.165.966.757.548.349.139.9311.6913.2816.6719.84

min2.363.574.365.165.956.747.548.339.1310.5312.1215.0918.26

OutsideDiameter(mm)max6.868.439.2510.0313.2814.0714.8715.6616.4619.0520.6324.6029.37

min5.847.428.239.0212.1212.9113.7114.5015.3017.4719.0523.0227.79

7/645/323/167/321/49/325/1611/323/87/161/25/83/4

GMENGINEERINGSTANDARDS

Table1B–CustomaryUnits

Size(inch)

InsideDiameter

(inch)max.125.172.204.235.266.297.328.360.391.461.523.656.781

min.093.140.172.203.234.265.296.328.359.415.477.594.719

OutsideDiameter(inch)max.270.332.364.395.523.554.585.617.648.750.812.9691.156

min.230.292.324.355.477.508.539.517.602.688.750.9071.094

1.2Cross-ReferenceofReplacedSpecifications.Subparagraphswerenotapplicable.1.3Symbol.Notapplicable.

1.4TypicalApplication.Notapplicable.1.5Remarks.Notapplicable.

VisualInspection:Allassembliesshallbeinspectedtoseethatthecorrectfittingsareproperlyapplied.3.1RequirementsonDelivery.3.1.1ChemicalRequirements.

3.1.1.1FuelResistance.Immediatelyafter70him-mersioninASTMReferenceFuelC,thereductionsintensilestrengthandelongationofthespecimenstakenfromthetubeshallconformtothefollowing:Originaltensilestrength,............−40%maximumor5.4MPaminimum.

Originalelongation................−40%maximumor130%minimum.

3.1.1.1.1Inaddition,thevolumechangeofspeci-menstakenfromthetubeshallbewithinthefollowinglimits:

Volumechange,%.............+20to+353.1.1.2OilResistance.Oilagetestsamplesfor70hat(100±2)󰀎CinASTMD4678IRM903oil.Re-movesamplesfromtheheatedoilandallowtocoolatroomtemperatureinfreshASTMD4678IRM903oilfor(30±5)minutes.Thetensilestrengthandelon-gationvaluesofspecimenstakenfromthetubeshallconformtothefollowing:

2References

Note:Onlythelatestapprovedstandardsareappli-cableunlessotherwisespecified.2.1Normative.ASTMD380ASTMD46782.2GM.GM4486PGM9067PGMW3059

GM9061PGMW3001ASTMD573ISO11014-1

3Requirements

ProceduresdescribedbyASTMD380(MethodsofTestingRubberHose)aretobefollowedwhereverap-plicable.Inthecaseofheataging(see3.1.2.2),followASTMD573also.

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GMENGINEERINGSTANDARDS

Changeintensile(3.1.2.1)...........−30%maximumor6.6MPaminimum

Changeinelongation(3.1.2.1)........−60%maximumor150minimum

3.1.1.2.1Thevolumechangeofsamplestakenfromthetubeandcovershallbewithinthefollowinglimits:Volumechange,%..............+2to+103.1.1.3OzoneResistance.Testprocedureandap-paratusshallbeinaccordancewithGM4486P(TestforOzoneResistanceofElastomerCompounds),whereapplicable.Aspecimenofthetubeshallbebentaroundamandrelhavinganoutsidediameterofseventimesthenominaloutsidediameterofthetubeundertest.Thetwoendsofthetubeshallbetieswheretheycrossoneanotherwithenameledcopperwireoraluminumwire.

3.1.1.3.1Aftermounting,thespecimenshallbeper-mittedtorestinarelativelyozonefreeatmospherefor72hatroomtemperature.Themountedspecimenshallbeplacedinasuitableozonetestchamberthatismaintainedat(100±5)partsozoneper100millionpartsofair(volumebasis)atsealevelandachamberambienttemperatureof(38±1)󰀎C.

3.1.1.3.2After336hofexposure,sampleshallberemovedfromthechamberandpermittedtocooltoroomtemperatureand,whilestillonthemandrel,shallbevisuallyinspectedforsignsofcrackingunder2Xmagnification.

3.1.1.3.3Theacceptableratingoftheexposedspec-imenshallbenogreaterthanNo.1.Theareaimme-diatelyadjacenttothewireshallbeignoredinmakingthevisualinspectionandrating.

3.1.1.4GasolineExtractablesTest.Gasolineex-tractables,asdeterminedbyGM9067PusingASTMReferenceFuelC,shallnotexceed2.32g/m2ofin-sidesurfaceareabasedontheinsidediameterofthetubing.

Note:Areaisbasedongagepinmeasurementofinsidediameteroftube.

3.1.2MechanicalRequirements.3.1.2.1OriginalProperties.

Tensilestrength,MPaminimum.........8.3Elongation,%minimum..............200Tensilestrengthat100%elongation,MPamini-mum...........................4.5Durometer,ShoreA..............65to803.1.2.2DryHeatResistance.Heatagetestsam-plesfor70hat150󰀎C.Removesamplesfromthe

GM6148M

oven,cooltoroomtemperature,andallowtorestfor16hminimum.Thetensilestrengthandelongationvaluesofspecimenstakenfromthetubeshallcon-formtothefollowing:

Tensilestrength,MPaminimum.........7.0Elongation,%minimum..............125Tensilestrengthat100%elongation,MPamini-mum...........................4.53.1.2.3BurstTest.Theminimumburstingstrengthforallsizesshallbe700kPa.

3.1.2.4VacuumCollapse.Tubingshallnotcollapsetotheextentthatasteelballhavingadiameterequaltoone-halfthenominalinsidediameterofthetubewillnotpassfreelythroughthetubewhenmaintainedinastraightpositionandtestedasfollows:

3.1.2.4.1Assemblea300mmspecimenoftubingonsuitableendfittingssothatoneendmaybecom-pletelysealedagainstairleakageandtheotherendmaybeconnectedtoavacuumsupply.

3.1.2.4.2Insertasteelballhavingadiameterequaltoone-halfthetubingnominalIDandinstallendfitting.3.1.2.4.3Subjecttubingfor15to30stoavacuumof88kPabelowatmosphericpressurefortubinghavinginsidediameterlessthan12.5mm,or34kPabelowatmosphericpressurefortubingof12.5mmdiameterorgreater.

3.1.2.4.4Withvacuumappliedandtubingheldinastraightposition,attempttorollballfromoneendoftubetotheother.

3.1.2.5ColdFlexibility.Two(2)samplesshallbeusedforthistest.One(1)sampleshallbeunagedandtheothersampleshallbeimmersedinASTMD4678IRM903oilfor70hat150󰀎C.Theagedandunagedsamplesshallthenbesubjectedto−40󰀎Cfor5h,af-terwhichthetubeshallbeflexedinthecoldchamberthrough180󰀎fromthecenterlinetoadiameterof10Xthemaximumoutsidediameterofthetube.Thisflex-ingshallbewithin4s.Thetubeshallnotfractureandshallnotshowanycracks,checks,orbreaksinthetube.Crackingofthetubeshallbedeterminedbyap-plicationofaproofpressureof700kPa.

3.1.2.6KinkResistance.Tubingshallnotkinktotheextentthatasteelballhavingadiameterequaltoone-halfthenominalinsidediameterofthetubewillnotpassfreelythroughthetubewhentestedasfollows:

3.1.2.6.1Useaboardorplateapproximately20mmthickwithholediameter,centerdistance,andsamplelengthasshowninTable2withspecifiedhoseID.

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GM6148M

GMENGINEERINGSTANDARDS

3.1.2.6.2Conditionspecifiedlengthoftubingfor2hat20to27󰀎C.

15.885/845015025.025.519.05

3/4

450

200

30.0

30.5

3.1.2.6.3Insertoneendofthetubingintoboardwithendflushwiththeoppositesideoftheboard.3.1.3.2Ovality.Thetubingshallnotbeout-of-round3.1.2.6.4Carefullybendtubingalongitsnaturalcur-totheextentthatasteeltestballequaltothediametervatureandinserttheotherendcarefullyintothesec-showninTable3forthenominaltubingIDwillnotrollondholeuntilitprojects65mmoutoftheotherside.freelythroughthetubingwhentestedasfollows:3.1.2.6.5Aftertubinghasbeeninthispositionfor53.1.3.2.1Conditionasamplelength(300mmpre-minutes,insertasteelballhavingdiameterequaltoferred)oftubingfor2hat20to27󰀎C.

one-halfthetubingnominalIDandattempttorollthisfromoneendofthetubingtotheother.3.1.3.2.2Withthetubinginastraightpositionandinitsfreeandunstressedstate,insertasteeltestball3.1.3PhysicalRequirements.

havingadiameterequaltothatshowninTable3for3.1.3.1PermeabilityTest.Permeability,asdeter-thenominaltubingID.AttempttorollballfromoneendminedbyGM9061P,shallnotexceed150g/m2ofin-ofthetubetotheother.

sidesurfaceareabasedontheinsidediameteroftheTable3:BallSizesforOvalityMeasurementstubingper24h.

HoseSizeNominalIDSteelTestBallNote:AreaisbasedongagepinmeasurementofDiameterinsidediameteroftube.

mminchmminchTable2:DimensionsforKinkResistance3.975/322.787/64HoseSizeHoseTestFixture

(NominalSam-4.763/163.579/64Insideple5.567/323.975/32Diameter)Length(mm)

6.35

1/44.763/16mm

inch

HoleHoleDiameter

7.149/325.1613/64Cen-(mm)

7.945/165.9515/64terDis-8.7311/326.7517/64tance9.533/87.149/32(mm)

11.11

7/168.3321/64mminchminmax12.701/29.523/82.787/64225127.07.515.885/811.9115/323.975/322501310.511.019.05

3/4

14.29

9/16

4.763/162501311.512.05.567/322751612.513.03.1.4AdditionalRequirements.Notapplicable.6.351/42751914.014.53.2ProcessingRequirements.Subparagraphswerenotapplicable.

7.149/322753514.515.07.942753.3PerformanceRequirements.Subparagraphs

5/164515.516.0werenotapplicable.

8.7311/322755016.016.53.4RequirementsonotherStagesduringLifeCy-9.533/83007517.017.5cle.Subparagraphswerenotapplicable.

11.117/163008819.520.04ManufacturingProcess

12.70

1/2

300

100

21.0

21.5

Notapplicable.

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---`,,`,`,,`,,`-`-,````,,,,,`,,,,`,,,`,,,,,,,,`--GMENGINEERINGSTANDARDSGM6148M

5.6SafetyDataSheets.CompletedcopiesoftheMaterialSafetyDataSheetsmeetingGMinformationrequirements,consistentwithISO11014-1standardmustbesubmittedwithanynewmaterialssubmis-sionsorwhereacompositionchangehasoccurred.5.7RulesandRegulationsforMaterialSpecifica-tions.AllmaterialssuppliedtothisspecificationmustcomplywiththerequirementsofGMW3001,RulesandRegulationsforMaterialSpecifications.

5RulesandRegulations

5.1LegalRegulations.Foruseofthismaterialthevalidlawsandotherregulationsandrecommenda-tionsinthecountryofusagehavetobefollowed.5.2Language.IntheeventofanyconflictbetweentheEnglishandthedomesticlanguageregardingthisdocument,theEnglishlanguagewilltakeprecedence.5.3RestrictedandReportableSubstancesforParts.AllmaterialssuppliedtothisspecificationmustcomplywiththerequirementsofGMW3059,RestrictedandReportableSubstancesforParts.5.4InspectionandRejection.Allshipmentsofma-terialsorpartsundercontractorpurchaseorderman-ufacturedtothisspecificationshallbeequivalentineveryrespecttotheinitialsamplesapprovedbyengi-neering.Thereshallbenochangesinformulationormanufacturingprocesspermittedwithoutpriornotifi-cationandapprovalbyengineering.Lackofnotifica-tionbythesupplierconstitutesgroundsforrejectionofanyshipment.Whilesamplesmaybetakenfromincomingshipmentsandcheckedforconformancetothisspecification,thesuppliershallaccepttherespon-sibilityforincomingshipmentsmeetingthisspecifi-cationwithoutdependenceuponpurchaser’sinspec-tion.

5.4.1Allmaterialsubmittedforproductionuseshallbesubjectedtoinfraredspectrophotometricand/orthermalgravimetricanalysisandshallbeequivalentinallcharacteristicstothematerialuponwhichap-provalwasoriginallygranted.

5.5InitialSourceApproval.NoshipmentsshallhavebeenmadebyanysupplieruntilrepresentativeinitialproductionsampleshavebeenapprovedbyMaterialsEngineeringasmeetingtherequirementsofthisspecification.

6ApprovedSources

Engineeringqualificationofanapprovedsourceisre-quiredforthisspecification.OnlysourceslistedintheGMCorporateMaterialsFile(MATSPC)underthisspecificationnumberhavebeenqualifiedbyengineer-ingasmeetingtherequirementsofthisspecification.

7CodingSystem

Thismaterialspecificationshallbereferencedinotherdocuments,drawings,VTS,CTS,etc.asfollows:GM6148M

8ReleaseandRevisions

8.1Release.ThespecificationwasfirstapprovedandpublishedinMarch1973.8.2Revisions.Rev.HI

Date

Description(Org.)

AUG1994Revised6.3,6.7(CPC)

DEC2000Changetoglobalformat(Hose

SpecialistTeam)

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GM6148M - Epichlorohydrin