MSS SP-138-2009 Quality Standard Practice for Oxyg

MSSSP-138-2009StandardPracticeDevelopedandApprovedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.127ParkStreet,NEVienna,Virginia22180Phone:[phone]Fax:[phone]E-mail:[e-mail]‘ExtractedfromMSSSP-138,2009withpermissionofthepublisher,theManufacturersStandardizationSociety.'ReproductionprohibitedundercopyrightconventionunlesswrittenpermissionisgrantedbytheManufacturersStandardizationSocietyoftheValveandFittingsIndustryInc.OriginallyApprovedApril,2008Copyright©,2009byManufacturersStandardizationSocietyoftheValveandFittingsIndustry,Inc.PrintedinU.S.A.MSSSTANDARDPRACTICESP-138iiFOREWORDThisStandardPracticewasdevelopedbyacooperativeeffortofrepresentativesofmanufacturerswhoproduceoxygencleanvalvesandfittings.Itisbasedonthebestpracticecurrentatthistimeandonthecollectiveexperienceoftheindustry.MSSSTANDARDPRACTICESP-138iiiTABLEOFCONTENTSSECTIONPAGEPURPOSE............................................................................................................................................11SCOPE.................................................................................................................................................12GENERALREQUIREMENTS...........................................................................................................13CLEANING.........................................................................................................................................14INSPECTIONANDACCEPTANCECRITERIA..............................................................................25POSTCLEANASSEMBLYANDTESTING....................................................................................36PACKAGING......................................................................................................................................47MARKING..........................................................................................................................................4MSSSTANDARDPRACTICESP-1381QUALITYSTANDARDPRACTICEFOROXYGENCLEANINGOFVALVES&FITTINGSPURPOSEThepurposeofthisStandardPracticeistoprovidestandardmethodsforprocessingvalvesandfittingsintendedtobeusedforOxygenService.Thepropercombinationofmethodsdependsuponthepart,itsmethodofmanufacture,andthetypesofcontaminationpresent.ItisrecommendedthatpriortoimplementationofthisStandardPractice,anagreementbereachedbetweenthepurchaserandtheproductmanufactureastotheappropriatemethodstobeusedfortheproducttobecleaned.1.SCOPE1.1ThisStandardPracticeoutlinesthegeneralrequirementsforcleaning,inspection,testing,andpackagingofvalvesandfittingsintendedtobeusedforOxygenservice.1.2ProperdesignandmaterialcompatibilityforOxygensystemsisoutsidethescopeofthisStandardPractice.2.GENERALREQUIREMENTS2.1Anycleaningagentusedmustbecompatiblewiththematerialofthecomponentbeingcleaned.2.2Chloride-freecleaningagentsshallbeusedonstainlesssteel.2.3Thehandling,storage,anduseofallchemicalsshallbeaccordingtotheinstructionsgivenintheirmaterialsafetydatasheets(MSDS).2.4Usedcleaningsolutionsshallbedisposedofinaccordancewithappropriatehazardouswasteregulations.2.5Partsofassembliesshallbedisassembledandseparatelycleanedbeforeassemblycanrenderanysurfaceinaccessibletocleaningandinspection.2.6Anyspecialtestsrequiredforassembliesthatemploymediathatisincompatiblewithoxygenshallbeperformedbeforedisassemblyforcleaning.2.7Cleaning,inspection,post-cleantesting,andpackagingshallbeconductedbyproperlytrainedandqualifiedpersonnel,knowledgeableofthisStandardPracticeandofthehazardsandpotentialignitionsourcesinoxygensystems.3.CLEANING3.1Cleaningmustensuretheremovalofcontaminantsthatcancausemechanicalmalfunction,fire,orexplosion.CleaningperthisStandardPracticewilleffectivelyremoverust,loosescale,dirt,weldsplatter,particles,greaseandoil.3.2Nosinglecleaningprocesswillremoveallpotentialignitionsources.Severalcleaningmethodswillneedtobeemployeddependinguponthetypeofcontaminationpresenttopassthepost-cleaninspection.3.3Beforedetailedcleaningoftheparts,heavyoilorgreasecontaminationmustbepre-cleanedusingalkalinecleanerordetergent.Usebrushesasnecessarytoassistthedegreasingaction.Residualdetergentistoberinsedfromthesurfacewithcleanwaterbeforeproceedingtoprecisioncleanin