MSS SP-105-1996(R2005) Instrument Valves for Code

MSSSP-105-1996Reaffirmed2005InstrumentValvesforCodeApplicationsStandardPracticeDevelopedandApprovedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.127ParkStreet,NEVienna,Virginia22180Phone:[phone](703)281-6671e-mail:[e-mail]yIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,``,`-`-`,,`,,`,`,,`---MSSSTANDARDPRACTICESP-105ThisMSSStandardPracticewasdevelopedundertheconsensusoftheMSSTechnicalCommittees115andtheMSSCoordinatingCommittee.ThecontentofthisStandardPracticeistheresultoftheeffortsofcompetentandconcernedvolunteerstoprovideaneffective,clear,andnon-exclusivespecificationthatwillbenefittheindustryasawhole.ThisMSSStandardPracticeisintendedasabasisforcommonpracticebythemanufacturer,theuser,andthegeneralpublic.TheexistenceofanMSSStandardPracticedoesnotinitselfprecludethemanufacture,sale,oruseofproductsnotconformingtotheStandardPractice.Mandatoryconformanceisestablishedonlybyreferenceinacode,specification,salescontract,orpubliclaw,asapplicable.Substantivechangesinthis1995editionare“flagged”byparallelbarsasshownonthemarginsofthisparagraph.Thespecificdetailofthechangemaybedeterminedbycomparingthematerialflaggedwiththatinthepreviousedition.Otherstandardsdocumentsreferredtohereinareidentifiedbythedateofissuethatwasapplicabletothisstandardatthedateofissueofthisstandard.SeeAnnexA.Thisstandardshallremainsilentontheapplicabilityofthoseotherstandardsofpriororsubsequentdatesofissueeventhoughprovisionsofconcernmaynothavechanged.Referencescontainedhereinwhicharebibliographicinnaturearenotedas“supp1emental’’inthetext.Anypartofthisstandardmaybequoted.CreditlinesshouldreadextractedfromMSSSP-105,1996,Rea$jìrmed2005withpermissionofthepublisher,theManufacturersStandardizationSociety,’Reproductionpro-hibitedundercopyrightconventionunlesswrittenpermissionisgrantedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustv,Inc.OriginallyApprovedJuly1990CopyrightO,1990byManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.PrintedinU.S.A.1CopyrightMSSProvidedbyIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,``,`-`-`,,`,,`,`,,`---MSSSTANDARDPRACTICESP-105ICONTENTSISECTIONPAGE1.SCOPE...............................................................................12.DEFINITIONS.......................................................................13.MATERIALS.........................................................................14UbSlCiNKbQUlKbMkNIS2-_...............................................................................5.QUALIFICATION....................................................................36.ACCEPTANCETESTING.............................................................57.MARKING...........................................................................5FIGURE1.DIRECTMOUNTEDINSTRUMENTMANIFOLDGASKETGROOVEANDFLANGEDETAILS..................................................4ANNEXA.REFERENCEDSTANDARDS...............................................611CopyrightMSSProvidedbyIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,``,`-`-`,,`,,`,`,,`---MSSSTANDARDPRACTICESP-105INSTRUMENTVALVESFORCODEAPPLICATIONS1.SCOPE2.4.Controlpiping:Pipingusedtointercon-nectpneumaticallyorhydraulicallyoperatedcontrolapparatus,ortosignaltransmissionsystems.1.1ThisStandardPracticeappliestosmallvalvesandmanifoldsdevelopedforandpre-dominatelyusedininstrument,controlandsamplingpipingsystems.Itcoverssteelandalloyvalvesof1”nominalpipesizeandsmaller,andpressureratingsof10,000psiandlowerat100°F.1.2ThisStandardPracticeappliestoinstru-mentvalvedesignsincludingbutnotlimitedtoneedlevalves,packlessvalves,ballvalves,plugvalves,checkvalvesandmanifoldvalves.Instru-mentvalvesaregenerallyofproprietarydesign;thisStandardPracticeisnotintendedtodefineorlimitdesigns,construction,performance,envelopedimensions,orvalvetypes.1.3Theapplicationofvalvetype,size,rating,materialsofconstruction,andsuitabilityfortheservicearetheresponsibilityofthepur-chaserandareoutsidethescopeofthisstandard.2.DEFINITIONS2.1General.DefinitionsgiveninMSSSP-96applytothisStandardPractice.2.2Instrumentvalves:Valvesdesignedforuseininstrument,controlandsamplingpipingsys-’3.Items(e.g.seeASMEB31.1,Article122.3).2.3Instrumentpiping:Pipingusedtointer-connectpneumaticallyorhydraulicallyoperatedcontrolapparatus,ortosignaltransmissionsystems.2.5Samplingpiping:Pipingusedforthecol-lectionofsamples(suchassteam,water,oil,gas,andchemicals)fromprocesssystems.2.6Manifoldvalve:TwoormoreinstrumentIIvalvesfabricatedintoasinglevalvebody.2.7Coldworkingpressurerating:Themaxi-mumallowableworkingpressureofavalveatambientconditions(-20”FtoIOO’F),abbrevi-atedCWP.2.8Pressureboundaryparts:Thefollowingitemsaredefinedtobepressureboundaryparts.Eachitemmaynotapplytoallvalvedesigns.a)Bodyb)Bonnetc.)UnionNutd)BodytoBonnetBoltinge)BodyBolting2.9Packlessvalve:Avalvewithadiaphrcigmorbellowsstemseal