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ISSSP-b79557706400500452TLTWSTANDARDPRACTICESP-671995EditionBUTTERFLYVALVESDevelopedandApprovedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.127ParkStreet,N.E.Vienna,Virginia22180(703)281-6613OriginallyApprovedMay1964COPYRIGHTManufacturersStandardizationSocietyoftheValveandFittingsLicensedbyInformationHandlingServicesCOPYRIGHTManufacturersStandardizationSocietyoftheValveandFittingsLicensedbyInformationHandlingServicesMSSSP-679557706400500453956MSSSTANDARDPRACTICESP-67AnMSSStandardPracticeisintendedasabasisforcommonpracticebythemanufacturer,theuser,andthegeneralpublic.TheexistenceofanMSSStandardPracticedoesnotinitselfprecludethemanufacture,sale,oruseofproductsnotconformingtotheStandardPractice.Mandatoryconformanceisestablishedonlybyreferenceinacode,specification,salescontract,orpubliclaw,asapplicable.US.customaryunitsinthisSParethestandard;themetricunitsareforreferenceonly.IISubstantivechangesinthis1995editionare“flagged”byparallelbarsasshownonthemarginsofthisparagraph.Thespecificdetailofthechangemaybedeterminedbycomparingthematerialflaggedwiththatinthepreviousedition.Anypartofthisstandardmaybequoted.Creditlinesshouldread‘ExtractedfromMSSSPd7-1995,withpermissionofthepublisher,theManufacturersStandardizationSociety.’ReproductionprohibitedundercopyrightconventionunlesswrittenpermissionisgrantedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.Copyright0,1983byManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.PrintedinU.S.A.1COPYRIGHTManufacturersStandardizationSocietyoftheValveandFittingsLicensedbyInformationHandlingServicesCOPYRIGHTManufacturersStandardizationSocietyoftheValveandFittingsLicensedbyInformationHandlingServicesMSSSP-6795W5770bYO0500Y5Y892MSSSTANDARDPRACTICESP47SECTION1.2.3.4.5.6.7.8.9.10.11.12.CONTENTSPAGECONTENTS..............................................................iiSCOPE...................................................................1REFERENCEDSTANDARDS...............