NAVY MIL-P-17553 A-1976 PACKING PREFORMED O-RING SYNTHETIC RUBBER《预先成型O形合成橡胶密封圈》.pdf

1、MIL-P-17553AOS)-22 June 1976-SUPERSEDING“MIL-G-17553(Ord)23March1953MILITARYSPECIFICATION* PACKING,PREFORMED,O-RING,SYNTHETICRUBBERThisspecificationis approvedforuseby theNavalSeaSystems Command, Department oftheNavy,and isavailable for use by alldepartrnents andagenciesof theDepartmen tofDefense.1,

2、 SCOPE1.1 Thisspecificationcove,rssyntheticrubberO-rinzpreformedpackingusedto provideboth a high-pressureand a low-pressuresealWithinrockets. Only one type,grade,class,and compositionof rubberasdescribedin thisspecificationwillbe acceptable,(See6,1,)a71 *2. APPLICABLEDOCUMENTS*2,1 Issuesof documents

3、.effecton dateof Invitationof thisspecificationto theThe followingdocumentsof the issuesinforbidsor requestforproposalsforma partextentspecifiedherein, In theeventof.conflictbetweenthisspecificationandotherdocumentsreferencedherein,the requirementsof thisspecificationshallapply.SPECIFICATIONSMilitar

4、y*MIL-p-481(jMIL-P-5516STANDARDSFederal*FED-STD-601Packing,Preformed,Rubber,Packing;PackagingofPacking,Preformed,PetroleumHydraulicFluidResistant,160FRubber,SamplingandTestingwProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17S53A(OS)MilitaryMI

5、L-STD-105 SamplingProceduresandTablesfor Inspectionby AttributesMIL-STD-129 MarkingforShipmentandStorage(Copiesof specifications,standards,drawingsandpublications a71requiredby contractorsin cofiectionwithspecificprocurementfrict-ions shouldbe obtainedfromtheprocuringactivityor as directedby ithe co

6、ntractingofficer,).-.3, REQUIREMENTS*3.1 Preproductionsample, A preproductionsampleof 100O-ringsandthreehardnesstestdiscs(see4.5.12)shallbe submittedto an activitydesignatedin the contractor purchaseorder. All of themoldsandasmanyof themold cavitiesaspossiblewhichthemanufacturerintendstouse duringpr

7、oductionshallbe representedby the100O-rings,3,2undermentsMaterial. Thematerialcompositionof theO-ringsfurnishedt-ification shallbe in strictaccordancewiththe.require=of the applicabledrawings, (See6,2.) a71*3,3 Dimensions,Dimensionsandtolerancesof theO-ringsshallcon-formto the drawingsspecifiedin th

8、econtractor purchaseorder. Alldimensionsshallapplyto theO-ringsin freestate,i.e.,notstretchedor compressed.Measurementsmaybe madeby comparator,shadowgraph,orotheracceptablemethodsof sufficientaccuracyforthetolerancesinvolved,*3,4 Physicalproperties,The physicalpropertiesof theO-ringsshallconformto t

9、herequirementsof tableI. Thenominalvalueforspecificgravityandtensilestressat 100percentelongationshallbetheaverageof thevaluesobservedforeachof thesepropertiesduringpreproductionlottests. The variationof thesepropertiesfromtheirnominalvaluesduringproduction(inspectiontests)shallbe as specifiedin tab

10、le1.3,5 Moldingprecess. ThemoldingprocessforO-ringsfurnishedunderthisspecificationshallbe in accordancewiththerequirementsof theapplicabledrawings, (See6,2,)2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL.P-17553A(OS)TableI. Physicalpropertiesre

11、quirements,PropertySwellingafter96 hoursimmersionin distilledwaterat 158FCompressionmodulusat 10%deflection,initialCompressionmodulusat 10%deflection,afteragingat 10%deflectionfor96 hoursat 158F(basedon initialdia,)Compressionset afteragingat 10%deflectionfor96 hoursat 158FCompressionset aftercondit

12、ioningat 10%deflectionfor96 hoursat -20FUltimateelongation,initiale Changeof ultimateelongationafteragingfor96 hoursat 158FTensilestrength,initialChangeof tensilestrengthafteragingfor96hoursat 158FPermanentsetCut resistance,initial*Changeof cutresistanceafteraging96 hours2 at 158F .*Specificgravity,

13、variationfromlotvalueHardness,shoredurometer*Tensilestress(modulus,Psi atpreproduction100%elonga-. . .tion,variationfrompreproductionlotvalueRequirement8%max.2 lb/linearin,min.10 lb/linearin,max.2 lb/linearin,min.70%max.70%max.150%min.-15%max,1500psimin-15%max,5% max.100 lbmin.-15%max.t0,2points75 *

14、 5 points25%Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL.P-17553A(OS)3,6 Freedomfrommaterialdefects,3,6.1 Surfacedefects, TheO-ringsshallbe freefromsurfacedefectsin accordancewiththeapplicabledrawingsspecifiedin the conractororder,3,6.2 Intern

15、aldefects. TheO-ringsshallbe freefrominternaldefectstfiatwouldcausefailureof theO-ringsto meetthe requirementsof table1,*3,7 Surfacefinishandtrimming. Themethodusedto trimthemoldflashshallnot removetheoriginalmoldedfinishof theO-ringoveranareawiderthanthemaximumpermissibleflashthicknessspecifiedon t

16、heapplicabledrawing, The finishof theO-ringsshallbe freefromblemish,flash,cuts,androughness.3,8 Workmanship.Workmanshipshailbe consistentwiththehighestgradecommercialpracticeinmanufacturingthiskindof equipment,3,9 Identificationof O-rings, O-ringsshallbe identified.inrela:-tionto theO-ringmanufactur

17、erandin accordancewiththisspecification by colorcoding, The identificationshallbe in accordancewithMIL-P-5516exceptas follows.*3.9,1 Everycodeassignedshallincludea greendotto signifycon-formanceto thisspecification.The greendot?ndthedot(s)formanu-facturers identificationshallbe adjacentandshallreadi

18、n a clock-wise direction,withthegreendot signifyingconformanceto thisspeci-ficationfirst.3,10 Age limitation.TheO-ringmanufacturershallnot deliverO-ringswhicharemorethan12monthsold (asdeterminedby dateof manufacture) Lto anyGovernmentserviceormanufacturerforstockingor installationpurposes,4, QUALITY

19、ASSURANCEPROVISIONS*4,1 Responsibilityforinspection.Unlessotherwisespecifiedin thecontractor purchaseorder,thesupplieris responsiblefortheperfor-manceof allinspectionrequirementsas specifiedherein. Exceptasotherwisespecifiedin thecontractor order,thesuppliermay usehis4Provided by IHSNot for ResaleNo

20、 reproduction or networking permitted without license from IHS-,-,-MIL-P-17553A(OS). .own or any otherfacilitiessuitablefortheperformanceof the inspec.tionrequirementsspecifiedherein, unlessdisapprovedby theGovernment,The Governmentreservesthe righttoperformanyof the inspectionssetforthin thespecifi

21、cationwheresuchinspectionsaredeemednecessaryto assuresuppliesandservicesconformto prescribedrequirements,*4,1.1 Samplin+Samplingplansandproceduresforinspectionshallbe in accorantewiththeprovisionsof MIL-STD-105exceptwhereother-8wisespecifiedherein,*4,1.2 Lots. Theterm“lot”shallmean “inspectionlot,”i

22、.e.,acollection-units of productsubmittedby an O-ringmanufacturerforGovernmentinspection,The numberof unitsof productin inspectionlots (see4,1,1,1)may differfromthequantitydesignatedin the con-9 tract,or order,as a lotforproduction,shipment,or otherpurpose,4,1.2,1 Lotsforinspectiontests, Afterenteri

23、nggeneralproduction,O-ringssubmittedunderthisspecificationshallbe subjectedtobatchcontroltests,productiontests,andcontroltests, A lotforbatchcon-0troltestsshallconsistof allthematerialconstitutingonemixedbatbh,i,e,thequantityof materialrunthrougha millor mixerat onetime, A lotforproductiontestsshall

24、consistof alltheO-ringspro-ducedin 1 day, A lotforcontroltestsshallconsistof alltheO-ringsproducedin a periodof not morethan1 week,*4,2 Classificationof inspections,The inspectionrequirementsspecifiedhereinareclassifiedas follows:a, Preproductioninspection(see4.3)b, Qualityconformanceinspection(see4

25、,4),*4,3 Preproductioninspection,Samplessubmittedin accordancewith3,1shallbe subjectedto all thetestslistedin tableII to determinecompliancewith therequirementsof section3, Noncomplianceshallbecausefor therejectionof thepreproductionsamples.*4,4 Quality conformanceinspection,Qualityconformanceinspec

26、tionshallconsistof thefollowingexaminationsandtests,Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17553A(OS)TABLE11. Preproduction.andcofittol”tests.Test;wellingin distilledwatercompressionmodulusat 10%defection,.nitial(82f 5 F);qmpressionmod

27、ulusat 10%defection,kfteragingat 158Fcompressionset afteragingat 158Fcompressionset afteragingat -20Frensilestress(modulus)at 100%:longationrensilestrength,initial(82* 5 F)Jltimateelongation,initial(82 5 F)rensilestrength,afteragingat 158FlJltimateelongation,afteragingat158FPermanentsetCutresistance

28、,initial(82+ 5 F)Cutresistance,afteragingat 158FHardnessSpecificgravity sNo, ofspecimens344446666636636Testparagraph4.5,14,5,24,5,34,5*44.5,54,5,64,5,74,5,74,S.84,5,84,5.9:1 4,5.4g4,5,114,5,124,5.”134,4,1 Batchcontroltests. Batchcontroltestsshallconsistof thetestslistedin table111. The testspecimens

29、shallbe as specifiedin4,5,12and 4.5,13, If anyof thespecimensfailto meetthe requirementsof 3,3,thebatchwhichit representsshallbe rejected,6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17553A(OS)TABLE111, Batchcontroltests,. .? Test No,of Tes

30、tspecimens paragraph.Hardness 3 4,5,12Specificgravity 6 4,5,139 v4.402 Productiontests. Theproductiontestsshallconsistof thetestslistedin tableIV. If any of thespecimensfailto meettherequirementsof 3,3,the lot,consistingof thatdaysproduction,shallbe rejected,TABLEIV, Productiontests,I Test I No, of

31、Testspecimens paragraphIe1Compressionmodulusat 10%deflection,initial 4 4,5,2ensilestress(modulus)at 100%elongation 6 4,5,6ensilestrength,initial 6 4,5.7ltimateelongation,initial 6 4*5.7Specificgravity 6 4,5,1”34.4,3 Controltests, The controltests(see4,1,2.1)shallconsistofthe testsllstedin table11, O

32、ne retestshallbe allowedforthefailureof a specimento meetanyoneof therequirementsas specifiedin 3.3. Failureon retestshallresultinwithdrawalof approvalforgeneralproduction,*4.5 Testmethods,4,5,1 Swellingin distilledwater,4,5,1.1of a Jolly4,5,1,2Apparatus,The apparatusrequiredforthistestshallconsistb

33、alance,testtube,distilledwater,anda waterbath.Procedure.The volumeof theO-ringshallbe calculatedlyweighingsin airandthenin waterusinga Jollybalanceor othersuit-ableapparatus,Thesemeasurementsshallbe madein a roommaintained#,7Provided by IHSNot for ResaleNo reproduction or networking permitted withou

34、t license from IHS-,-,-MT1P.17553A(OS)at a temperatureof 82f 5 Fahrenheit(F), PlacetheO-ringin a testtubeandcoverwith 100milliliters(ml) of distilledwater;looselco-rkandplacethe testtubein a waterbath at 158i 2 F for96 hours, Atthe endof theimmersionperiodremovethetesttubefromthewaterbat;andallowthe

35、 contentsto coolfor30minutesin theconstanttemperatueroom, Redeterminethevolumeof theO-ringby meansof theJollybalane,4,5,2 Compressionmodulusat 10percentdeflection5 F)., initial(82t4,5,2,1 Amaratus. The amaratus forobtaininthe loaddeflection.characterishe O-rinIis shownschematicalyby figure1, Theappa

36、ratusshallconsistof tie following:a bearingplate-withcentralhole,supportedby a tripodwith levelingscrews;a pressureplatesupportingat itscenter,by ball-and-socketarrangementa weightpen;a split-ringspecimenpositioningdeviceforcenteringtheO-ringunderthepressureplate;anda dialmicrometergraduatedin roils

37、,supportedon a bracketattachedto thebearingplate,formeasuringthedownwardmovementof thepressureplate, The metalsurfacescontactingthetestspecimenshallhave a surfacefinishof 63 microinchesor smoother.4,5,2,2 Procedure,The initialcross-sectionaldiameter(D)of theO-ringshallbe measured,in the axialdirecti

38、on,usinga micrometerhavinga pressurefootof 0.25t 0,01inchin diameterandexertiing”atotalforceof 3,0f 0,1ounce. The thicknessof thepressureplate(T)shallbe measuredwith a machinistsmicrometer.The dialmicrometeron the compressionapparatusshallbe set to zerowhileitsfootisrest-ingon thebearingplate. The O

39、-ringshallbe well lubricatedwithsil-conegrease(Dow-CorningDC-11)and centeredbetweenthepressureplateandbearingplateby meansof thepositioningdevice+ Thepercentcom-pression(C)of theO-ring,undertheweightof the,pressureplateandthe emptyweightpan,shallbe calculatedfromtheheightof theO-ringplusthepressurep

40、lateas indicatedon thedialmicrometer(H):c= D+T-HD x 100Weightsshallthenbe addedto theweightpan in incrementsof 5 poundsuntilan addedloadof 20poundshasbeen reached,thereaftertheweightsshallbe addedin 10-poundincrementsuntila deflectionof at least10percenthasbeenreached. Deflectionreadingsshallbe take

41、nexactly30 secondsaftereachweightis added. Thenextloadincrementshallbeaddedimmediatelyfollowingeachloadreading. Calculationsshallbemadeforeachloadby use of the foregoingequation.Thepercentcom-pressionshallbe plottedagainstloadsper linealinch(calculatedfromcircumferenceat centerof crosssection)andthe

42、 lbadto cause10per-centdeflectionshallbe determinedfromthecurveby interpolation.8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17553A(OS)DIAL MICROMETERy$llo76 25fPRESSURE PLATEfhRINGoI II WEIGHTS II“L BEARING PLATEFIGURE1, Apparatusforcompre

43、ssionmodulustests.9Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-17553A(OS)4,5,3 Compressionmodulusat 10percentdeflection,afteragingat158F,4,5,3,1 Apparatus,The compressiondeviceshallconsistof twoor ,moreflatsteelplatesbetweenwhichtheO-ringis

44、 tobe compressed,The metalsurfaceswhichwillbe in contactwiththeO-ringshallhavea surfacefinishof 63 microinchesor smoother, Steelspacersshallbe *placedon twosides(diametricallyopposed)of theO-ringto controlitethicknessto a compressionof 10percent, The platesshallbe boltedtogetherat allfourcornersforc

45、ompressionandholdingtheO-ring, *4,5,3,2 Procedure,Measurethe cross-sectionaldiameter(Dof theO-ring, in theaxialdirection,usinga dialmicrometerhavinga presserfoot0,25Y 0,01inchin diameterandexerting.-atotalforceof 3,0*0,1 ounce, CoattheO-ringwith siliconegrease(DC-11)andcenteritononeof theplates, Pla

46、cea sufficientnumberof steelspacersonbothsidesof theO-ringto equal90,0* 0,2percentof itscross-sectionaldiameter,The otherplateshallbe placedon topof theO-ringandtheboltsshallbe tightenedsothat.theplatesare drawntogetheruniformlyuntiltheyarein contactwiththespacers, Place”theassenbledtestapparatusin

47、a circulatingairovenat 158* 2 F for96hours, At theend of thisperiod,the assemblyshallbe removedfromthe oven,theO-ringreleasedandallowedto recoverfor 30minutesat 70to90ILThe thickness(A)of theO-ringshallbe measuredin thedirectionof ocompressionusingthe dialmicrometer,Thisvalueshallbe usedforcomputing

48、the compressionset as specifiedin 4,5,4, Thenthe compres-sionmodulusshallbe determinedas specifiedin 4,5,2usingthecross-sectionaldiameter(D)of theO-ringpriorto agingas thebasisfordeterminingthepercentcompression.4,5,4 Compressionset afteragingat 158F. Compressionset(s)afteragingat 10percentdeflectio

49、nfor96hoursat 158”F shallbe calculatedusingthefollowingequation: 9v=7HTbx100The valuesforthe initialdiameter(D)of theO-ringandforthethickness (A)of theO-ringafteragingshallbe as determinedin 445.3.10Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Q MIL-P-17553A(OS)4