NACE SP0403-2015文档格式.docx

NACE SP0403-2015文档格式.docx

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NACESP0403-2015（formerlyRP0403）ItemNo.21102

StandardPractice

AvoidingCausticStressCorrosionCrackingofRefinery

EquipmentandPiping

ThisNACEInternationalstandardrepresentsaconsensusofthoseindividualmemberswhohavereviewedthisdocument,itsscope,andprovisions.Itsacceptancedoesnotinanyrespectprecludeanyone,whetherheorshehasadoptedthestandardornot,frommanufacturing,marketing,purchasing,orusingproducts,processes,orproceduresnotinconformancewiththisstandard.NothingcontainedinthisNACEstandardistobeconstruedasgrantinganyright,byimplicationorotherwise,tomanufacture,sell,oruseinconnectionwithanymethod,apparatus,orproductcoveredbyletterspatent,orasindemnifyingorprotectinganyoneagainstliabilityforinfringementofletterspatent.Thisstandardrepresentsminimumrequirementsandshouldinnowaybeinterpretedasarestrictionontheuseofbetterproceduresormaterials.Neitheristhisstandardintendedtoapplyinallcasesrelatingtothesubject.Unpredictablecircumstancesmaynegatetheusefulnessofthisstandardinspecificinstances.NACEassumesnoresponsibilityfortheinterpretationoruseofthisstandardbyotherpartiesandacceptsresponsibilityforonlythoseofficialNACEinterpretationsissuedbyNACEinaccordancewithitsgoverningproceduresandpolicieswhichprecludetheissuanceofinterpretationsbyindividualvolunteers.

UsersofthisNACEstandardareresponsibleforreviewingappropriatehealth,safety,environmental,andregulatorydocumentsandfordeterminingtheirapplicabilityinrelationtothisstandardpriortoitsuse.ThisNACEstandardmaynotnecessarilyaddressallpotentialhealthandsafetyproblemsorenvironmentalhazardsassociatedwiththeuseofmaterials,equipment,and/oroperationsdetailedorreferredtowithinthisstandard.UsersofthisNACEstandardarealsoresponsibleforestablishingappropriatehealth,safety,andenvironmentalprotectionpractices,inconsultationwithappropriateregulatoryauthoritiesifnecessary,toachievecompliancewithanyexistingapplicableregulatoryrequirementspriortotheuseofthisstandard.

CAUTIONARYNOTICE:

NACEstandardsaresubjecttoperiodicreview,andmayberevisedorwithdrawnatanytimeinaccordancewithNACEtechnicalcommitteeprocedures.NACErequiresthatactionbetakentoreaffirm,revise,orwithdrawthisstandardnolaterthanfiveyearsfromthedateofinitialpublicationandsubsequentlyfromthedateofeachreaffirmationorrevision.Theuseriscautionedtoobtainthelatestedition.PurchasersofNACEstandardsmayreceivecurrentinformationonallstandardsandotherNACEpublicationsbycontactingtheNACEF/rs/ServiceDepartment,15835ParkTenPlace.,Houston,TX77084-5145（telephone+1281-228-6200）.

Approved2015-03-14

NACEInternational

1440SouthCreekDrive

Houston,Texas77084-4906

+1281-228-6200

ISBN:

1-57590-179-X

©

2015,NACEInternational

CopyrightNACEInternational

ProvidedbyIHSunderlicensewithNACE

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SP0403-2015

Foreword

Causticisusedinmanypetroleumrefineryapplicationsinawiderangeofconcentrationsandtemperatures.Thisstandardpracticeisintendedtoprovideguidancetothosedesigning,fabricating,and/ormaintainingequipmentandpipingthatareexposedtocausticenvironments.

Causticstresscorrosioncracking（SCO）ofcarbonsteel（CS）equipmenthasbeenreportedinindustrysincethe1930s,e.g.,inrivetedsteamboilers.NACEhaspublishedguidanceforhandlingsodiumhydroxide（NaOH）intheformofa"

CausticServiceChart"

sinceatleastthemid-1960s.ItisbelievedthatthemajorityofthedatausedtoproducethecurvesinthechartweredevelopedbyH.W.Schmidt,et.al.1TheCausticServiceChartiscurrentlypublishedintheNACECorrosionEngineer'

sReferenceBook2AmodifiedcopyofthechartisincludedasFigure1inthisstandardpractice.

Aninformalreviewofcurrentindustrycaustic-handlingpracticeswascompletedin1999.Thisstandardpracticeincorporatesthefindingsofthatsurveyastheyapplytorefineryapplications.

ThisstandardpracticewaspreparedbyNACETaskGroup（TG）177（formerlyT-8-25）,"

Refineries,EnvironmentalCracking.,,TG177wasformedin1998todisseminateinformationonenvironmentalcrackinginrefineries.WorkGroup（WG）177awasformedfromthatTGtosurveytheindustryo