MSSSP-88-2010DiaphragmValvesStandardPracticeDevelopedandApprovedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.127ParkStreet,NEVienna,Virginia22180Phone:(703)281-6613Fax:(703)281-6671e-mail:info@mss-hq.orgwww.mss-hq.orgMSSSTANDARDPRACTICESP-88iThisMSSStandardPracticewasdevelopedundertheconsensusoftheMSSTechnicalCommittee406andtheMSSCoordinatingCommittee.ThecontentofthisStandardPracticeistheresultoftheeffortsofcompetentandconcernedvolunteerstoprovideaneffective,clear,andnon-exclusivespecificationthatwillbenefittheindustryasawhole.ThisMSSStandardPracticeisintendedasabasisforcommonpracticebythemanufacturer,theuser,andthegeneralpublic.TheexistenceofanMSSStandardPracticedoesnotinitselfprecludethemanufacture,sale,oruseofproductsnotconformingtotheStandardPractice.Mandatoryconformanceisestablishedonlybyreferenceinacode,specification,salescontract,orpubliclaw,asapplicable."OtherstandardsdocumentsreferredtohereinareidentifiedbythedateofissuethatwasapplicabletothisStandardPracticeatthedateofissueofthisStandardPractice.SeeAnnexB.ThisStandardPracticeshallremainsilentontheapplicabilityofthoseotherstandardsofpriororsubsequentdatesofissueeventhoughapplicableprovisionsmaynothavechanged.Referencescontainedhereinwhicharebibliographicinnaturearenotedas‘supplemental’inthetext.”UnlessotherwisespecificallynotedinthisMSSSP,anyStandardreferredtohereinisidentifiedbythedateofissuethatwasapplicabletothereferencedStandard(s)atthedateofissueofthisMSSStandardPractice(SeeAnnexB).InthisStandardPracticeallnotes,annexes,tables,andfiguresareconstruedtobeessentialtotheunderstandingofthemessageofthestandard,andareconsideredpartofthetextunlessnotedas"supplemental".Allappendicesappearinginthisdocumentareconstruedas"supplemental".Supplemental"informationdoesnotincludemandatoryrequirements.Substantivechangesinthis2010editionare“flagged”byparallelbarsasshownonthemarginsofthisparagraph.Thespecificdetailofthechangemaybedeterminedbycomparingthematerialflaggedwiththatintheprevi...