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1、~~STDDMSSSP-42-ENGL2999=577064005DLLBOO29=MSSSP-42-1999Class150(PN20)CorrosionResistantGate,Globe,AngleandCheckValveswithFlangedandButtWeldEndsStandardPracticeDevelopedandApprovedbytheManufacturersStandardizationSocietyoftheValveandFittings,Industry,I
2、nc.127ParkStreet,N.E.Vienna,Virginia22180COPYRIGHTManufacturersStandardizationSocietyoftheValveandFittingsLicensedbyInformationHandlingServices~~~~~~~STD*MSSSP-42-ENGL1999=5770b40050LL81Tb5MSSSTANDARDPRACTICESP-42AnMSSStandardPracticeisintendedasabasi
3、sforcommonpracticebythemanufacturer,theuser,andthegenera1public.TheexistenceofanMSSStandardPracticedoesnotinitselfprecludethemanufacture,sale,oruseofproductsnotconformingtotheStandardPractice.Mandatoryconformanceisestablishedonlybyreferenceinacode,spe
4、cification,salescontract,orpubliclaw,asapplicable.Thisdocumenthasbeensubstantivelyrevisedfromthepreviousedition.Itissuggestedthatiftheuserisinterestedinknowingwhatchangeshavebeenmade,directpagebypagecomparisonshouldbemadeofthisdocumentwiththe1995editi
5、on.Anypartofthisstandardmaybequoted.Creditlinesshouldread‘ExtractedfromMSSSP-42,2000,withpermissionofthepublishel;thManufacturersStandardizationSociety.’ReproductionprohibitedundercopyrightconventionunlesswrittenpermissionisgrantedbytheManufacturersSt
6、andardizationSocietyoftheValveandFittingsIndusty,Inc.UnlessotherwisespecificallynotedinthisMSSSP,anystandardreferredtohereinisidentifiedbythedateofissuethatwasapplicabletothereferencedstandard(s)atthedateofissueofthisMSSSP.SeeAnnexB.OriginallyApproved
7、October1949Copyright01985byManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.PrintedinU.S.A.iCOPYRIGHTManufacturersStandardizationSocietyoftheValveandFittingsLicensedbyInformationHandlingServicesSTDaMSSSP-42-ENGL1999W5770640050LL829
8、TLWMSSSTANDARDPRACTICESP-428CONTENTSSectionPage1.SCOPE.................................................................................................................................................................................12.STANDARDU
