MSS SP-120-2006 Flexible Graphite Packing System f

MSSSP-120-2006(703)281-6613Email:[e-mail]ngSystemforRisingStemSteelValves-DesignRequirementsMSSCopyrightMSSProvidedbyIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---MSSSTANDARDPRACTICESP-120iThisMSSStandardPracticewasdevelopedundertheconsensusoftheMSSTechnicalCommittee308andtheMSSCoordinatingCommittee.ThecontentofthisStandardPracticeistheresultoftheeffortsofcompetentandconcernedvolunteerstoprovideaneffective,clear,andnon-exclusivespecificationthatwillbenefittheindustryasawhole.ThisMSSStandardPracticeisintendedasabasisforcommonpracticebythemanufacture,theuser,andthegeneralpublic.TheexistenceofanMSSStandardPracticedoesnotinitselfprecludethemanufacture,sale,oruseofproductsnotconformingtotheStandardPractice.Mandatoryconformanceisestablishedonlybyreferenceinacode,specification,salescontract,orpubliclaw,asapplicable.U.S.customaryunitsinthisSParethestandard;metric(SI)unitsareforreferenceonly.UnlessotherwisespecificallynotedinthisMSSSP,anystandardreferredtohereinisidentifiedbythedateofissuethatwasapplicabletothereferencedstandard(s)atthedateofissueofthisMSSSP.(SeeAnnexA).Anypartofthisstandardmaybequoted.Creditlinesshouldread'ExtractedfromMSSSP-120,2006,withpermissionofthepublisher,theManufacturersStandardizationSociety.'ReproductionprohibitedundercopyrightconventionunlesswrittenpermissionisgrantedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.OriginallyApprovedMarch1997Copyright©1997byManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.PrintedinU.S.A.CopyrightMSSProvidedbyIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---MSSSTANDARDPRACTICESP-120iiFOREWORDThisStandardPracticewasdevelopedbyacooperativeeffortofrepresentativesofvalveandpackingmanufacturers.ThisStandardPracticeisintendedprimarilytobeanaidforthemanufactureandprocurementofpackingsystemswithdesignfeaturesforrising-stemsteelvalvesthatutilizeflexiblegraphitepacking.However,thisdoesnotprecludetheuseofthesesystemfeaturesforothertypesofpackingsystemssincethisStandardPracticerepresentstheconsensusinputfromabroadspectrumofindustryapplications.ThisStandardPracticeshallnotbeconstruedtobeeffectiveforallpressuresandtypesofservicesexpectedofASMEB16.34valves.SpecialserviceapplicationssuchaslowfugitiveemissionscontrolortoxicfluidmayrequireadditionalordifferentdesignmeasuresthatareoutsidethescopeofthisStandardPractice.CopyrightMSSProvidedbyIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---MSSSTANDARDPRACTICESP-120iiiTABLEOFCONTENTSSECTIONPAGE1SCOPE.............................................................................................................................................12DEFINITIONS................................................................................................................................13PACKINGASSEMBLY.................................................................................................................14STEM..............................................................................................................................................25PACKINGGLAND.......................................................................................................................26PACKINGCHAMBER..................................................................................................................27PACKINGWASHERORVALVEBONNET..............................................................................2TABLE1PackingSystemDetails(U.S.Units)..............................................................................................32PackingSystemDetails(MetricUnits)..........................................................................................4FIGURE1PackingSystemDetails(U.S.Units)...............................................................................................32PackingSystemDetails(MetricUnits)...........................................................................................43Stem/BonnetDetails(U.S.Units)...................................................................................................54Stem/BonnetDetails(MetricUnits)...............................................................................................65GeometricSymbolsDefinitions.....................................................................................................7ANNEXAReferencedStandardsandApplicableDates..................................................................................8CopyrightMSSProvidedbyIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---MSSSTANDA