MSSSP-136-2007StandardPracticeDevelopedandApprovedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.127ParkStreet,NEVienna,Virginia22180Phone:(703)281-6613Fax:(703)281-6671E-mail:info@mss-hq.orgwww.mss-hq.orgDuctileIronSwingCheckValvesCopyrightMSSProvidedbyIHSunderlicensewithMSSNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---MSSSTANDARDPRACTICESP-136iThisMSSStandardPracticewasdevelopedundertheconsensusoftheMSSTechnicalCommittee106andtheMSSCoordinatingCommittee.ThecontentofthisStandardPracticeistheresultoftheeffortsofcompetentandconcernedvolunteerstoprovideaneffective,clear,andnon-exclusivespecificationthatwillbenefittheindustryasawhole.ThisMSSStandardPracticeisintendedasabasisforcommonpracticebythemanufacturer,theuser,andthegeneralpublic.TheexistenceofanMSSStandardPracticedoesnotinitselfprecludethemanufacture,sale,oruseofproductsnotconformingtotheStandardPractice.Mandatoryconformanceisestablishedonlybyreferenceinacode,specification,salescontract,orpubliclaw,asapplicable.UnlessotherwisespecificallynotedinthisMSSSP,anystandardreferredtohereinisidentifiedbythedateofissuethatwasapplicabletothereferencedstandard(s)atthedateofissueofthisMSSSP(SeeAnnexC).Non-toleranceddimensionsinthisStandardPracticearenominal,and,unlessotherwisespecified,shallbeconsidered“forreferenceonly”.InthisStandardPracticeallnotes,annexes,tables,andfiguresareconstruedtobeessentialtotheunderstandingofthemessageofthestandard,andareconsideredpartofthetextunlessnotedas"supplemental".Allappendicesappearinginthisdocumentareconstruedas"supplemental".Supplemental"informationdoesnotincludemandatoryrequirements.Anypartofthisstandardmaybequoted.Creditlinesshouldread‘ExtractedfromMSSSP-136,2007withpermissionofthepublisher,theManufacturersStandardizationSociety.'ReproductionprohibitedundercopyrightconventionunlesswrittenpermissionisgrantedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustryInc.OriginallyApprovedF...