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【船级社】 DNV-CP-0291.pdf
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【船级社】 DNV-CP-0291.pdf
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CLASS PROGRAMME
Typeapproval
DNV-CP-0291 EditionSeptember2021
Additivemanufacturingfeedstock
ThecontentofthisservicedocumentisthesubjectofintellectualpropertyrightsreservedbyDNVAS(“DNV”).Theuser
acceptsthatitisprohibitedbyanyoneelsebutDNVand/oritslicenseestoofferand/orperformclassification,certification
and/orverificationservices,includingtheissuanceofcertificatesand/ordeclarationsofconformity,whollyorpartly,onthe
basisofand/orpursuanttothisdocumentwhetherfreeofchargeorchargeable,withoutDNV’spriorwrittenconsent.DNV
isnotresponsiblefortheconsequencesarisingfromanyuseofthisdocumentbyothers.
ThePDFelectronicversionofthisdocumentavailableattheDNVwebsitednv.comistheofficialversion.Ifthere
areanyinconsistenciesbetweenthePDFversionandanyotheravailableversion,thePDFversionshallprevail.
DNVAS
![](https://csdnimg.cn/release/download_crawler_static/88583507/bg2.jpg)
FOREWORD
DNVclassprogrammescontainproceduralandtechnicalrequirementsincludingacceptance
criteriaforobtainingandretainingcertificatesforobjectsandorganisationsrelatedto
classification.
©
DNVASSeptember2021
Anycommentsmaybesentbye-mailtorules@dnv.com
Thisservicedocumenthasbeenpreparedbasedonavailableknowledge,technologyand/orinformationatthetimeofissuanceofthis
document.TheuseofthisdocumentbyotherpartiesthanDNVisattheuser'ssolerisk.DNVdoesnotacceptanyliabilityorresponsibility
forlossordamagesresultingfromanyuseofthisdocument.
![](https://csdnimg.cn/release/download_crawler_static/88583507/bg3.jpg)
CHANGES–CURRENT
ThisdocumentsupersedestheJune2019editionofDNVGL-CP-0291.
Thenumberingand/ortitleofitemscontainingchangesishighlightedinred.
ChangesSeptember2021
Topic Reference Description
RebrandingtoDNV All ThisdocumenthasbeenrevisedduetotherebrandingofDNV
GLtoDNV.Thefollowinghavebeenupdated:thecompany
name,materialandcertificatedesignations,andreferencesto
otherdocumentsintheDNVportfolio.Someofthedocuments
referredtomaynotyethavebeenrebranded.Ifso,pleasesee
therelevantDNVGLdocument.Notechnicalcontenthasbeen
changed.
Editorialcorrections
Inadditiontotheabovestatedchanges,editorialcorrectionsmayhavebeenmade.
Changes-current
Classprogramme:Typeapproval—DNV-CP-0291.EditionSeptember2021 Page3
Additivemanufacturingfeedstock
DNVAS
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CONTENTS
Changes–current.................................................................................................. 3
Section1General....................................................................................................5
1Objective..............................................................................................5
2Scope................................................................................................... 5
3Application...........................................................................................5
4References........................................................................................... 5
5Definitionsandabbreviations.............................................................. 6
6Definitionsandterminologyrelatedtoadditivemanufacturing........... 7
Section2Typeapproval........................................................................................10
1Typeapprovalprocedure................................................................... 10
2Retentionoftypeapprovalcertificate............................................... 12
3Renewaloftypeapprovalcertificate................................................. 12
4Suspensionandwithdrawaloftypeapprovalcertificate....................12
Section3Typetesting.......................................................................................... 13
1General.............................................................................................. 13
2Preparationoftestblocksandsamplingoftestspecimens................13
3Testingofpowderandproduct..........................................................16
4Re-testing.......................................................................................... 19
Changes–historic................................................................................................20
Contents
Classprogramme:Typeapproval—DNV-CP-0291.EditionSeptember2021 Page4
Additivemanufacturingfeedstock
DNVAS
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SECTION1GENERAL
1Objective
Theobjectiveofthisclassprogramme(CP)istogiveadescriptionofthetypeapproval(TA)schemefor
feedstockintendedforadditivemanufacturing(AM).
ThegeneralrequirementsforobtainingDNVtypeapprovalcertificatearegiveninDNV-CP-0338.
2Scope
Thisclassprogrammespecifiestherequirementsthemanufacturershallcomplywithinordertoobtain,
maintainandrenewtheSociety'sTAcertificateformanufacturingoffeedstock,intendedforproducts
manufacturedbyadditivemanufacturing,seeDNV-CP-0267.
3Application
Thedocumentisapplicableforfeedstockforadditivemanufacturingandformanufacturersoffeedstock.
Itcoversinparticularfeedstockfor:
— normal,highandextrahighstrengthsteels
— boilerandpressurevesselsteels
— steelsforlowtemperatureservice
— austeniticstainlesssteels
— duplexsteels
— aluminiumalloys
— copperalloys
— nickelandnickelalloys
— titaniumalloys
Feedstocktypescoveredbythisclassprogrammearegivenasfollows:
— metalpowderfeedstocks,producedbyairatomizationorinertgasatomizationmethod.Qualification
programmeforqualificationoffeedstockmanufacturedbyotherprocesseslikeplasmaatomization,
centrifugalatomization,wateratomizationshallbeagreed
— wirefeedstock,typicallymanufacturedbythesameprocessasforweldingwire.
Othertypesoffeedstockmaybeapproveduponagreement.
4References
ApplicablereferencestandardsaregiveninTable1.
Table1Referencestandards
Documentcode Title
ASTM/ISO52921 StandardTerminologyforAdditiveManufacturing
ASTMB213 StandardTestMethodsforFlowRateofMetalPowdersUsingtheHallFlowmeterFunnel
ASTMB417 StandardTestMethodforApparentDensityofNon-Free-FlowingMetalPowdersUsingthe
CarneyFunnel
ASTMB527 StandardTestMethodforTapDensityofMetalPowdersandCompounds
Section1
Classprogramme:Typeapproval—DNV-CP-0291.EditionSeptember2021 Page5
Additivemanufacturingfeedstock
DNVAS
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