StandardSpecificationfor
GeneralRequirementsforCarbonandLowAlloySteelTubes1ThisstandardisissuedunderthefixeddesignationA450/A450M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.
1.Scope*
1.1Thisspecification2coversagroupofrequirementswhich,withtheexceptionsof6.3andSections7,8,19,20,21,22,23,24,and25,aremandatoryrequirementstothefollow-ingASTMtubularproductspecifications:3TitleofSpecification
Electric-Resistance-WeldedCarbonSteelandCarbonManganeseSteelBoilerTubes
SeamlessCold-DrawnLow-CarbonSteelHeat-ExchangerandCondenserTubes
SeamlessCarbonSteelBoilerTubesforHigh-PressureService
SeamlessMedium-CarbonSteelBoilerandSuper-heaterTubes
Electric-Resistance-WeldedCarbonSteelHeat-ExchangerandCondenserTubes
SeamlessandElectric-WeldedLow-AlloySteelTubesSpecificationforSeamlessandWeldedCarbonSteelHeat-ExchangerTubeswithIntegralFins
SeamlessCold-DrawnCarbonSteelFeedwaterHeaterTubes
Seamless,Cold-DrawnCarbonSteelTubingforHy-draulicSystemService
AASTMDesignationAA178/A178MA179/A179MA192/A192MA210/A210MA214/A214MA423/A423MA498A556/A556MA822/A822M
SIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Theinch-poundunitsshallapplyunlessthe“M”designation(SI)oftheproductspecificationisspecifiedintheorder.
2.ReferencedDocuments
2.1ASTMStandards:4A178/A178MSpecificationforElectric-Resistance-WeldedCarbonSteelandCarbon-ManganeseSteelBoilerandSuperheaterTubes
A179/A179MSpecificationforSeamlessCold-DrawnLow-CarbonSteelHeat-ExchangerandCondenserTubes
A192/A192MSpecificationforSeamlessCarbonSteelBoilerTubesforHigh-PressureService
A210/A210MSpecificationforSeamlessMedium-CarbonSteelBoilerandSuperheaterTubes
A214/A214MSpecificationforElectric-Resistance-WeldedCarbonSteelHeat-ExchangerandCondenserTubes
A370TestMethodsandDefinitionsforMechanicalTestingofSteelProducts
A423/A423MSpecificationforSeamlessandElectric-WeldedLow-AlloySteelTubes
A498SpecificationforSeamlessandWeldedCarbonSteelHeat-ExchangerTubeswithIntegralFins
A530/A530MSpecificationforGeneralRequirementsforSpecializedCarbonandAlloySteelPipe
A556/A556MSpecificationforSeamlessCold-DrawnCar-bonSteelFeedwaterHeaterTubes
A700GuideforPackaging,Marking,andLoadingMethodsforSteelProductsforShipment
A751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProducts
A822/A822MSpecificationforSeamlessCold-DrawnCar-bonSteelTubingforHydraulicSystemService
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.
4Thesedesignationsrefertothelatestissueoftherespectivespecifications.
1.2OneormoreofSections6.3,7,8,19,20,21,22,22.1,24,and25applywhentheproductspecificationorpurchaseorderhasarequirementforthetestoranalysisdescribedbythesesections.
1.3Incaseofconflictbetweenarequirementoftheproductspecificationandarequirementofthisgeneralrequirementspecificationonlytherequirementoftheproductspecificationneedbesatisfied.
1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,the
ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.09onCarbonSteelTubularProducts.
CurrenteditionapprovedMay1,2015.PublishedJune2015.Originallyapprovedin1961.Lastpreviouseditionapprovedin2010asA450/A450M–10.DOI:10.1520/A0450_A0450M-15.2ForASMEBoilerandPressureVesselCodeapplicationsseerelatedSpecifi-cationSA-450inSectionIIofthatCode.3AnnualBookofASTMStandards,Vols01.01and01.04.
1*ASummaryofChangessectionappearsattheendofthisstandard
Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959.UnitedStates
1
A450/A450M−15
A941TerminologyRelatingtoSteel,StainlessSteel,RelatedAlloys,andFerroalloys
A1047/A1047MTestMethodforPneumaticLeakTestingofTubing
A1058TestMethodsforMechanicalTestingofSteelProducts—Metric
D3951PracticeforCommercialPackaging
E92TestMethodforVickersHardnessofMetallicMaterials(Withdrawn2010)5E213PracticeforUltrasonicTestingofMetalPipeandTubing
E273PracticeforUltrasonicTestingoftheWeldZoneofWeldedPipeandTubing
E309PracticeforEddy-CurrentExaminationofSteelTubu-larProductsUsingMagneticSaturation
E426PracticeforElectromagnetic(Eddy-Current)Examina-tionofSeamlessandWeldedTubularProducts,Titanium,AusteniticStainlessSteelandSimilarAlloys
E570PracticeforFluxLeakageExaminationofFerromag-neticSteelTubularProducts2.2FederalStandard:
Fed.Std.No.183ContinuousIdentificationMarkingofIronandSteelProducts62.3MilitaryStandards:
MIL-STD-163SteelMillProductsPreparationforShip-mentandStorage6MIL-STD-271NondestructiveTestingRequirementsforMetals6MIL-STD-792IdentificationMarkingRequirementsforSpecialPurposeEquipment62.4ASMEBoilerandPressureVesselCode:SectionIX72.5SteelStructuresPaintingCouncil:
SSPC-SP6SurfacePreparationSpecificationNo.6Com-mercialBlastCleaning82.6OtherDocument:
SNT-TC-1ARecommendedPracticeforNondestructivePersonnelQualificationandCertification.3.Terminology
3.1DefinitionsofTermsSpecifictoThisStandard:
3.1.1remeltedheat—insecondarymelting,alloftheingotsremeltedfromasingleprimaryheat.
3.1.2thin-walltube—atubemeetingthespecifiedoutsidediameterandspecifiedwallthicknesssetforthasfollows:
SpecifiedOutside
Diameter
2in.[50.8mm]orlessGreaterthan2in.[50.8mm]Any
SpecifiedWallThickness
2%orlessofspecifiedoutsidediameter3%orlessofspecifiedoutsidediameter
0.020in.[0.5mm]orless
3.2Otherdefinedterms—ThedefinitionsinTestMethodsandDefinitionsA370,TestMethods,Practices,andTerminol-ogyA751,andTerminologyA941areapplicabletothisspecificationandtothoselistedin1.1.4.OrderingInformation
4.1Itisthepurchaser’sresponsibilitytospecifyinthepurchaseorderallorderinginformationnecessarytopurchasetheneededmaterial.Examplesofsuchinformationinclude,butarenotlimitedto,thefollowing:
4.1.1Quantity(feet,metres,ornumberoflengths),
4.1.2Specificiationnumberwithgradeorclass,orboth,asapplicableandyeardate,
4.1.3Manufacture(hot-finishedorcold-finished),
4.1.4Size(outsidediameterandminimumwallthickness),4.1.5Length(specificorrandom),
4.1.6Testreportrequired(seeSection27),
4.1.7ChoiceoftestingtrackfromtheoptionslistedinTestMethodsA1058whenmaterialisorderedtoanMsuffix(SIunits)productstandard.Ifthechoiceoftesttrackisnotspecifiedintheorder,thenthedefaultASTMtesttrackshallbeusedasnotedinTestMethodsA1058.4.1.8SupplementaryRequirements,and4.1.9Additionalrequirements.5.Process
5.1Thesteelmaybemadebyanyprocess.
5.2Ifaspecifictypeofmeltingisrequiredbythepurchaser,itshallbeasstatedonthepurchaseorder.
5.3Theprimarymeltingmayincorporateseparatedegas-singorrefiningandmaybefollowedbysecondarymelting,suchaselectroslagremeltingorvacuum-arcremelting.5.4Steelmaybecastiningotsormaybestrandcast.Whensteelofdifferentgradesissequentiallystrandcast,identifica-tionoftheresultanttransitionmaterialisrequired.Theproducershallremovethetransitionmaterialbyanestablishedprocedurethatpositivelyseparatesthegrades.6.ChemicalComposition
6.1Samplesforchemicalanalysis,andmethodofanalysisshallbeinaccordancewithTestMethods,Practices,andTerminologyA751.
6.2HeatAnalysis—Iftheheatanalysisreportedbythesteelproducerisnotsufficientlycompleteforconformancewiththeheatanalysisrequirementsoftheapplicableproductspecifica-tiontobefullyassessed,themanufacturermaycompletetheassessmentofconformancewithsuchheatanalysisrequire-mentsbyusingaproductanalysisforthespecifiedelementsthatwerenotreportedbythesteelproducer,providedthatproductanalysistolerancesarenotappliedandtheheatanalysisisnotaltered.
2
Thelastapprovedversionofthishistoricalstandardisreferencedonwww.astm.org.6AvailablefromStandardizationDocumentsOrderDesk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098.7AvailablefromAmericanSocietyofMechanicalEngineers(ASME),ASMEInternationalHeadquarters,TwoParkAve.,NewYork,NY10016-5990,http://www.asme.org.8AvailablefromSocietyforProtectiveCoatings(SSPC),4024thSt.,6thFloor,Pittsburgh,PA15222-4656,http://www.sspc.org.
5A450/A450M−15
6.3ProductAnalysis—Productanalysisrequirementsandoptions,ifany,arecontainedintheproductspecification.7.TensileProperties
7.1Thematerialshallconformtotherequirementsastotensilepropertiesprescribedintheindividualspecification.7.2Theyieldstrengthcorrespondingtoapermanentoffsetof0.2%ofthegagelengthortoatotalextensionof0.5%ofthegagelengthunderloadshallbedetermined.
7.3Ifthepercentageofelongationofanytestspecimenislessthanthatspecifiedandanypartofthefractureismorethan3⁄4in.[19.0mm]fromthecenterofthegagelength,asindicatedbyscribemarksonthespecimenbeforetesting,aretestshallbeallowed.8.StandardWeights
8.1Thecalculatedweightperunitlength,baseduponaspecifiedminimumwallthickness,shallbedeterminedbythefollowingequation:
W5C~D2t!t
(1)
TABLE2PermissibleVariationsinWallThicknessAWallThickness,%
OutsideDiameter,in.[mm]
0.095[2.4]andUnderOver
4[101.6]andunderOver4[101.6]
40...
Under
Over0.095to0.150[2.4to3.8],inclOver
Under
Over0.150to0.180[3.8to4.6],inclOver
Under00
Over0.180,[4.6]
Over2828
Under00
Seamless,Hot-FinishedTubes035033...
35
0
33
Seamless,Cold-FinishedTubesOver
2022
WeldedTubes
18
Under000
11⁄2[38.1]andunder
Over11⁄2[38.1]Allsizes
AThesepermissiblevariationsinwallthicknessapplyonlytotubes,exceptinternal-upsettubes,asrolledorcold-finished,andbeforeswaging,expanding,bending,polishing,orotherfabricatingoperations.
where:C=W=D=t=
10.69[0.0246615],
weight,lb/ft[kg/m],
specifiedoutsidediameter,in.[mm],andspecifiedminimumwallthickness,in.[mm]
10.PermissibleVariationsinOutsideDiameter
10.1Exceptasprovidedin10.2,variationsfromthespeci-fiedoutsidediametershallnotexceedtheamountsprescribedinTable3.
10.2Thin-walltubesusuallydevelopsignificantovality(outofroundness)duringfinalannealing,orstraightening,orboth.ThediametertolerancesofTable3arenotsufficienttoprovideforadditionalovalityexpectedinthin-walltubes,and,forsuchtubes,areapplicableonlytothemeanoftheextreme(maxi-mumandminimum)outsidediameterreadingsinanyonecrosssection.However,forthinwalltubesthedifferenceinextremeoutsidediameterreadings(ovality)inanyonecrosssectionshallnotexceedthefollowingovalityallowances:
OutsideDiameter
1in.[25.4mm]andunderOver1in.[25.4mm]
OvalityAllowance0.020in.[0.5mm]
2.0%ofspecifiedoutsidediameter
8.2Thepermissiblevariationsfromthecalculatedweightperfoot[kilogrampermetre]shallbeasprescribedinTable1.9.PermissibleVariationsinWallThickness
9.1VariationsfromthespecifiedminimumwallthicknessshallnotexceedtheamountsprescribedinTable2.
9.2Fortubes2in.[50.8mm]andoverinoutsidediameterand0.220in.[5.6mm]andoverinthickness,thevariationinwallthicknessinanyonecrosssectionofanyonetubeshallnotexceedthefollowingpercentageoftheactualmeanwallatthesection.Theactualmeanwallisdefinedastheaverageofthethickestandthinnestwallinthatsection.
Seamlesstubes610%Weldedtubes65%9.3Whencold-finishedtubesasorderedrequirewallthick-nesses3⁄4in.[19.1mm]orover,oraninsidediameter60%orlessoftheoutsidediameter,thepermissiblevariationsinwallthicknessforhot-finishedtubesshallapply.
TABLE1PermissibleVariationsinWeightPerUnitLengthAMethodofManufacture
Seamless,hot-finishedSeamless,cold-finished:
11⁄2in.[38.1mm]andunderODOver11⁄2in.[38.1mm]ODWelded
ATABLE3PermissibleVariationsinOutsideDiameterAOutsideDiameter,
in.[mm]
PermissibleVariations,in.[mm]Over
Under
PermissibleVariationinWeight
perUnitLength,%
Over16121310
Under0000
Hot-FinishedSeamlessTubes
1⁄64[0.4]1⁄32[0.8]4[101.6]andunder
113⁄64[1.2]Over4to7⁄2[101.6to190.5],incl⁄64[0.4]111⁄16[1.6]⁄64[0.4]Over7⁄2to9[190.5to228.6],incl
WeldedTubesandCold-FinishedSeamlessTubesUnder1[25.4]0.004[0.1]0.004[0.1]
11to1⁄2[25.4to38.1],incl0.006[0.15]0.006[0.15]Over11⁄2to2[38.1to50.8],excl0.008[0.2]0.008[0.2]
0.010[0.25]0.010[0.25]2to21⁄2[50.8to63.5],excl
21⁄2to3[63.5to76.2],excl0.012[0.3]0.012[0.3]3to4[76.2to101.6],incl0.015[0.38]0.015[0.38]Over4to71⁄2[101.6to190.5],incl0.015[0.38]0.025[0.64]Over71⁄2to9[190.5to228.6],incl0.015[0.38]0.045[1.14]Exceptasprovidedin10.2,thesepermissiblevariationsincludeout-of-roundness.Thesepermissiblevariationsinoutsidediameterapplytohot-finishedseamless,weldedandcold-finishedseamlesstubesbeforeotherfabricatingoperationssuchasupsetting,swaging,expanding,bending,orpolishing.
AThesepermissiblevariationsinweightapplytolotsof50tubesormoreinsizes4in.[101.6mm]andunderinoutsidediameter,andtolotsof20tubesormoreinsizesover4in.[101.6mm]inoutsidediameter.
3
A450/A450M−15
11.PermissibleVariationsinLength
11.1VariationsfromthespecifiedlengthshallnotexceedtheamountsprescribedinTable4.
12.PermissibleVariationsinHeightofFlashonElectric-Resistance-WeldedTubes12.1Fortubesover2in.[50.8mm]inoutsidediameter,orover0.135in.[3.44mm]inwallthickness,theflashontheinsideofthetubesshallbemechanicallyremovedbycuttingtoamaximumheightof0.010in.[0.25mm]atanypointonthetube.
12.2Fortubes2in.[50.8mm]andunderinoutsidediameterand0.135in.[3.4mm]andunderinwallthickness,theflashontheinsideofthetubeshallbemechanicallyremovedbycuttingtoamaximumheightof0.006in.[0.15mm]atanypointonthetube.13.StraightnessandFinish
13.1Finishedtubesshallbereasonablystraightandhavesmoothendsfreeofburrs.Theyshallhaveaworkmanlikefinish.Surfaceimperfections(seeNote1)mayberemovedbygrinding,providedthatasmoothcurvedsurfaceismaintained,andthewallthicknessisnotdecreasedtolessthanthatpermittedbythisortheproductspecification.Theoutsidediameteratthepointofgrindingmaybereducedbytheamountsoremoved.
NOTE1—Animperfectionisanydiscontinuityorirregularityfoundinthetube.
15.Retests
15.1Iftheresultsofthemechanicaltestsofanygrouporlotdonotconformtotherequirementsspecifiedintheindividualspecification,retestsmaybemadeonadditionaltubesofdoubletheoriginalnumberfromthesamegrouporlot,eachofwhichshallconformtotherequirementsspecified.16.Retreatment
16.1Iftheindividualtubesorthetubesselectedtorepresentanygrouporlotfailtoconformtothetestrequirements,theindividualtubesorthegrouporlotrepresentedmayberetreatedandresubmittedfortest.Notmorethantworeheattreatmentsshallbepermitted.17.TestSpecimens
17.1Testspecimensshallbetakenfromtheendsoffinishedtubespriortoupsetting,swaging,expanding,orotherformingoperations,orbeingcuttolength.Theyshallbesmoothontheendsandfreeofburrsandflaws.
17.2Ifanytestspecimenshowsflawsordefectivemachining,itmaybediscardedandanotherspecimensubsti-tuted.
18.MethodofMechanicalTesting
18.1ThespecimensandmechanicaltestsrequiredshallbemadeinaccordancewithAnnexA2ofTestMethodsandDefinitionsA370ifinch-poundunitsarespecifiedortotherequirementsdescribedintheapplicabletrackofTestMethodsA1058ifSIunitsarespecified.
18.2Specimensshallbetestedatroomtemperature.18.3SmallorsubsizespecimensasdescribedinTestMethodsandDefinitionsA370orTestMethodsA1058maybeusedonlywhenthereisinsufficientmaterialtoprepareoneofthestandardspecimens.Whenusingsmallorsubsizespecimens,thelargestonepossibleshallbeused.19.FlatteningTest
19.1Asectionoftubenotlessthan21⁄2in.[63mm]inlengthforseamlessandnotlessthan4in.[100mm]inlengthforweldedshallbeflattenedcoldbetweenparallelplatesintwosteps.Forweldedtubes,theweldshallbeplaced90°fromthedirectionoftheappliedforce(atapointofmaximumbending).Duringthefirststep,whichisatestforductility,nocracksorbreaks,exceptasprovidedforin19.4,ontheinside,outside,orendsurfacesshalloccurinseamlesstubes,orontheinsideoroutsidesurfacesofweldedtubes,untilthedistancebetweentheplatesislessthanthevalueofHcalculatedbythefollowingequation:
H5
14.RepairbyWelding
14.1Repairweldingofbasemetaldefectsintubingispermissibleonlywiththeapprovalofthepurchaserandwiththefurtherunderstandingthatthetubeshallbemarked“WR”andthecompositionofthedepositedfillermetalshallbesuitableforthecompositionbeingwelded.Defectsshallbethoroughlychippedorgroundoutbeforeweldingandeachrepairedlengthshallbereheattreatedorstressrelievedasrequiredbytheapplicablespecification.Eachlengthofre-pairedtubeshallbetestedhydrostaticallyasrequiredbytheproductspecification.
14.2RepairweldingshallbeperformedusingproceduresandweldersorweldingoperatorsthathavebeenqualifiedinaccordancewithASMEBoilerandPressureVesselCode,SectionIX.
TABLE4PermissibleVariationsinLengthAMethodofManufactureSeamless,hot-finishedSeamless,cold-finishedWelded
AOutsideDiameter,in.[mm]AllsizesUnder2[50.8]2[50.8]andoverUnder2[50.8]2[50.8]andover
CutLength,in.[mm]Over⁄[5]⁄[3]3⁄16[5]1⁄8[3]3⁄16[5]
31618Under00000[0][0][0][0][0]
~11e!t
e1t/D
(2)
Thesepermissiblevariationsinlengthapplytotubesbeforebending.Theyapplytocutlengthsuptoandincluding24ft[7.3m].Forlengthsgreaterthan24ft[7.3m],theaboveover-tolerancesshallbeincreasedby1⁄8in.[3mm]foreach10ft[3m]orfractionthereofover24ftor1⁄2in.[13mm],whicheveristhelesser.
where:H=distancebetweenflatteningplates,in.[mm],t=specifiedwallthicknessofthetube,in.[mm],D=specifiedoutsidediameterofthetube,in.[mm],and
4
A450/A450M−15
e
=deformationperunitlength(constantforagivengradeofsteel:0.07formedium-carbonsteel(maximumspecifiedcarbon0.19%orgreater),0.08forlowalloysteel,and0.09forlow-carbonsteel(maximumspeci-fiedcarbon0.18%orless)).
Duringthesecondstep,whichisatestforsoundness,theflatteningshallbecontinueduntilthespecimenbreaksortheoppositewallsofthetubemeet.Evidenceoflaminatedorunsoundmaterial,orofincompleteweldthatisrevealedduringtheentireflatteningtestshallbecauseforrejection.19.2Surfaceimperfectionsinthetestspecimensbeforeflattening,butrevealedduringthefirststepoftheflatteningtest,shallbejudgedinaccordancewiththefinishrequirements.19.3Superficialrupturesresultingfromsurfaceimperfec-tionsshallnotbecauseforrejection.
19.4WhenlowD-to-tratiotubularproductsaretested,becausethestrainimposedduetogeometryisunreasonablyhighontheinsidesurfaceatthesixandtwelveo’clocklocations,cracksattheselocationsshallnotbecauseforrejectioniftheDtotratioislessthan10.20.ReverseFlatteningTest
20.1A5in.[100mm]inlengthoffinishedweldedtubinginsizesdowntoandincluding1⁄2in.[12.7mm]inoutsidediametershallbesplitlongitudinally90°oneachsideoftheweldandthesampleopenedandflattenedwiththeweldatthepointofmaximumbend.Thereshallbenoevidenceofcracksorlackofpenetrationoroverlapsresultingfromflashremovalintheweld.21.FlaringTest
21.1Asectionoftubeapproximately4in.[100mm]inlengthshallstandbeingflaredwithatoolhavinga60°includedangleuntilthetubeatthemouthoftheflarehasbeenexpandedtothepercentagesspecifiedinTable5withoutcrackingorshowingimperfectionsrejectableundertheprovisionsoftheproductspecification.22.FlangeTest
22.1Asectionoftubeshallbecapableofhavingaflangeturnedoveratarightangletothebodyofthetubewithoutcrackingorshowingimperfectionsrejectableundertheprovi-TABLE5FlaringTestRequirements
RatioofInsideDiametertoOutside
DiameterA0.90.80.70.60.50.40.3
Asionsoftheproductspecification.ThewidthoftheflangeforcarbonandalloysteelsshallbenotlessthanthepercentagesspecifiedinTable6.23.HardnessTest
23.1Fortubes0.200in.[5.1mm]andoverinwallthickness,eithertheBrinellorRockwellhardnesstestshallbeused.WhenBrinellhardnesstestingisused,a10-mmballwith3000,1500,or500-kgload,ora5-mmballwith750-kgloadmaybeused,attheoptionofthemanufacturer.
23.2Fortubeslessthan0.200in.[5.1mm]toandincluding0.065in.[1.7mm]inwallthickness,theRockwellhardnesstestshallbeused.
23.3Fortubeslessthan0.065in.[1.7mm]inwallthickness,thehardnesstestshallnotberequired.
23.4TheBrinellhardnesstestmaybemadeontheoutsideofthetubeneartheend,ontheoutsideofaspecimencutfromthetube,oronthewallcrosssectionofaspecimencutfromthetubeattheoptionofthemanufacturer.Thistestshallbemadesothatthedistancefromthecenteroftheimpressiontotheedgeofthespecimenisatleast2.5timesthediameteroftheimpression.
23.5TheRockwellhardnesstestmaybemadeontheinsidesurface,onthewallcrosssection,oronaflatontheoutsidesurfaceattheoptionofthemanufacturer.
23.6Fortubesfurnishedwithupset,swaged,orotherwiseformedends,thehardnesstestshallbemadeasprescribedin23.1and23.2ontheoutsideofthetubeneartheendaftertheformingoperationandheattreatment.
23.7Forweldedorbrazedtubes,thehardnesstestshallbemadeawayfromthejoints.
23.8WhentheproductspecificationprovidesforVickershardness,suchtestingshallbeinaccordancewithTestMethodE92.
24.HydrostaticTest
24.1Exceptasprovidedin24.2and24.3,eachtubeshallbetestedbythemanufacturertoaminimumhydrostatictestpressuredeterminedbythefollowingequation:
Inch2PoundUnits:P532000t/D
SIUnits:P5220.6t/D
(3)
MinimumExpansionofInside
Diameter,%CarbonSteels
21222530395168
LowAlloySteels
15171923283850
where:
P=hydrostatictestpressure,psiorMPa,tD
=specifiedwallthickness,in.ormm,and=specifiedoutsidediameter,in.ormm.
TABLE6FlangeRequirements
OutsideDiameterofTube,in.[mm]To21⁄2[63.5],incl
Over21⁄2to33⁄4[63.5to95.2],inclOver33⁄4to8[95.2to203.2],incl
WidthofFlange15%ofOD121⁄2%ofOD10%ofOD
Indeterminingtheratioofinsidediametertospecifiedoutsidediameter,theinsidediametershallbedefinedastheactualmeaninsidediameterofthematerialtested.
5
A450/A450M−15
24.1.1ThehydrostatictestpressuredeterminedbyEq3shallberoundedtothenearest50psi[0.5MPa]forpressurebelow1000psi[7MPa],andtothenearest100psi[1MPa]forpressures1000psi[7MPa]andabove.Thehydrostatictestmaybeperformedpriortocuttingtofinallength,orpriortoupsetting,swaging,expanding,bendingorotherformingoperations,orboth.
24.2RegardlessofthedeterminationmadebyEq3,theminimumhydrostatictestpressurerequiredtosatisfytheserequirementsneednotexceedthevaluesgiveninTable7.Thisdoesnotprohibittestingathigherpressuresatmanufacturer’soptionorasprovidedin24.3.
24.3Withconcurrenceofthemanufacturer,aminimumhydrostatictestpressureinexcessoftherequirementsof24.2or24.1,orboth,maybestatedontheorder.Thetubewallstressshallbedeterminedbythefollowingequation:
S5PD/2t
(4)
TubeO.D.in[mm]
#1.5[#40]>1.5#2.0[>40#50]>2.0#2.5[>50#65]>2.5#3.0[>65#75]
>3.0[>75]
CalibrationHole,max.in[mm]
0.003[0.076]0.004[0.162]0.005[0.127]0.006[0.152]byagreement
26.NondestructiveExamination
26.1Whennondestructiveexaminationisspecifiedbythepurchaserortheproductspecification,eachtubeshallbeexaminedbyanondestructiveexaminationmethodinaccor-dancewithPracticeE213,PracticeE309(forferromagneticmaterials),PracticeE426(fornon-magneticmaterials),orPracticeE570.Uponagreement,PracticeE273shallbeem-ployedinadditiontooneofthefullperipherytests.Therangeoftubesizesthatmaybeexaminedbyeachmethodshallbesubjecttothelimitationsinthescopeofthatpractice.Incaseofconflictbetweenthesemethodsandpracticesandthisspecification,therequirementsofthisspecificationshallpre-vail.
26.2Thefollowinginformationisforthebenefitoftheuserofthisspecification.
26.2.1Calibrationstandardsforthenondestructiveelectrictestareconvenientstandardsforcalibrationofnondestructivetestingequipmentonly.Forseveralreasons,includingshape,orientation,width,etc.,thecorrelationbetweenthesignalproducedintheelectrictestfromanimperfectionandfromcalibrationstandardsisonlyapproximate.Apurchaserinter-estedinascertainingthenature(type,size,location,andorientation)ofdiscontinuitiesthatcanbedetectedinthespecificapplicationoftheseexaminationsshoulddiscussthiswiththemanufacturerofthetubularproduct.
26.2.2Theultrasonicexaminationreferredtointhisspeci-ficationisintendedtodetectlongitudinaldiscontinuitieshavingareflectiveareasimilartoorlargerthanthecalibrationreferencenotchesspecifiedin26.4.Theexaminationmaynotdetectcircumferentiallyorientedimperfectionsorshort,deepdefects.
26.2.3Theeddycurrentexaminationreferencedinthisspecificationhasthecapabilityofdetectingsignificantdiscontinuities,especiallyoftheshortabrupttype.PracticesE309andE426containadditionalinformationregardingthecapabilitiesandlimitationsofeddy-currentexamination.
26.2.4Thefluxleakageexaminationreferredtointhisspecificationiscapableofdetectingthepresenceandlocationofsignificantlongitudinallyortransverselyorienteddisconti-nuities.Theprovisionsofthisspecificationonlyprovideforlongitudinalcalibrationforfluxleakage.Itshouldberecog-nizedthatdifferenttechniquesshouldbeemployedtodetectdifferentlyorientedimperfections.
26.2.5ThehydrostatictestreferredtoinSection23isatestmethodprovidedforinmanyproductspecifications.Thistesthasthecapabilityoffindingdefectsofasizepermittingthetestfluidtoleakthroughthetubewallandmaybeeithervisuallyseenordetectedbyalossofpressure.Thistestmaynotdetectverytight,through-the-walldefectsordefectsthatextendanappreciabledistanceintothewallwithoutcompletepenetra-tion.
26.2.6Apurchaserinterestedinascertainingthenature(type,size,location,andorientation)ofdiscontinuitiesthatcan
6
where:
S=tubewallstress,psiorMPa,andallothersymbolsas
definedin24.1.1.24.4Thetestpressureshallbeheldforaminimumof5s.24.5Ifanytubeshowsleaksduringthehydrostatictest,itshallberejected.
24.6Thehydrostatictestmaynotbecapableoftestingtheendportionofthepipe.Thelengthsofpipethatcannotbetestedshallbedeterminedbythemanufacturerand,whenspecifiedinthepurchaseorder,reportedtothepurchaser.25.AirPressureTest
25.1AirUnderwaterTest—Whenthistestisemployed,eachtube,withinternalsurfacecleananddry,shallbeinternallypressurizedto150psi[1000kPa]minimumwithcleananddrycompressedairwhilebeingsubmergedinclearwater.Thetubeshallbewell-lighted,preferablybyunderwaterillumination.Anyevidenceofairleakageofthepneumaticcouplingsshallbecorrectedpriortotesting.Inspectionshallbemadeoftheentireexternalsurfaceofthetubeafterholdingthepressurefornotlessthan5safterthesurfaceofthewaterhasbecomecalm.Ifanytubeshowsleakageduringtheairunderwatertest,itshallberejected.Anyleakingareasmaybecutoutandthetuberetested.
25.2PneumaticLeakTest—Whenthistestisemployed,eachtubeshallbesubjectedtoapneumaticleaktestinaccordancewithSpecificationA1047/A1047M.Acceptancecriteriashallbeasfollows:
TABLE7HydrostaticTestPressures
OutsideDiameterofTube,in.[mm]Under1[25.4]1to11⁄2[25.4to38.1],excl11⁄2to2[38.1to50.8],excl2to3[50.8to76.2],excl3to5[76.2to127],excl5[127]andoverHydrostaticTestPressure,psi[MPa]100015002000250035004500[7][10][14][17][24][31]A450/A450M−15
bedetectedinthespecificapplicationoftheseexaminationsshoulddiscussthiswiththemanufacturerofthetubularproducts.
26.3TimeofExamination—Nondestructiveexaminationforspecificationacceptanceshallbeperformedafteralldeforma-tionprocessing,heattreating,welding,andstraighteningop-erations.Thisrequirementdoesnotprecludeadditionaltestingatearlierstagesintheprocessing.
26.4SurfaceCondition:
26.4.1Allsurfacesshallbefreeofscale,dirt,grease,paint,orotherforeignmaterialthatcouldinterferewithinterpretationoftestresults.Themethodsusedforcleaningandpreparingthesurfacesforexaminationshallnotbedetrimentaltothebasemetalorthesurfacefinish.
26.4.2Excessivesurfaceroughnessordeepscratchescanproducesignalsthatinterferewiththetest.
26.5ExtentofExamination:
26.5.1Therelativemotionofthetubeandthetransducer(s),coil(s),orsensor(s)shallbesuchthattheentiretubesurfaceisscanned,exceptforendeffectsasnotedin26.5.2.
26.5.2Theexistenceofendeffectsisrecognized,andtheextentofsucheffectsshallbedeterminedbythemanufacturer,and,ifrequested,shallbereportedtothepurchaser.Othernondestructivetestsmaybeappliedtotheendareas,subjecttoagreementbetweenthepurchaserandthemanufacturer.26.6OperatorQualifications:
26.6.1ThetestunitoperatorshallbecertifiedinaccordancewithSNT-TC-1A,oranequivalentdocumentedstandardagreeabletobothpurchaserandmanufacturer.
26.7TestConditions:
26.7.1Forexaminationbytheultrasonicmethod,themini-mumnominaltransducerfrequencyshallbe2.0MHz,andthemaximumtransducersizeshallbe1.5in.[38mm].
26.7.2Foreddycurrenttesting,theexcitationcoilfre-quencyshallbechosentoensureadequatepenetration,yetprovidegoodsignal-to-noiseratio.
26.7.2.1Themaximumcoilfrequencyshallbe:
SpecifiedWallThickness
<0.050in.0.050to0.150
>0.150
MaximumFrequency
100KHz5010
oneholeandrunthecalibrationstandardthroughthetestcoilthreetimes,rotatingthetubeapproximately120°eachtime.Morepasseswithsmallerangularincrementsmaybeused,providedtestingofthefull360°ofthecoilisobtained.Forweldedtubing,iftheweldisvisible,oneofthemultipleholesorthesingleholeshallbedrilledintheweld.
26.8.2.2TransverseTangentialNotch—Usingaroundtoolorfilewitha1⁄4in.[6.4mm]diameter,anotchshallbemilledorfiledtangentialtothesurfaceandtransversetothelongitu-dinalaxisofthetube.Saidnotchshallhaveadepthnotexceeding121⁄2%ofthespecifiedwallthicknessofthetubeor0.004in.[0.1mm],whicheverisgreater.
26.8.2.3LongitudinalNotch—Anotch0.031in.[0.8mm]orlessinwidthshallbemachinedinaradialplaneparalleltothetubeaxisontheoutsidesurfaceofthetube,tohaveadepthnotexceeding121⁄2%ofthespecifiedwallthicknessofthetubeor0.004in.[0.1mm],whicheverisgreater.Thelengthofthenotchshallbecompatiblewiththetestingmethod.
26.8.3Forultrasonictesting,thereferenceIDandODnotchesshallbeanyoneofthethreecommonnotchshapesshowninPracticeE213,attheoptionofthemanufacturer.Thedepthofthenotchesshallnotexceed121⁄2%ofthespecifiedwallthicknessofthetubeor0.004in.[0.1mm],whicheverisgreater.Thewidthofthenotchshallnotexceedtwotimesthedepth.Forweldedtubing,thenotchesshallbeplacedintheweld,iftheweldisvisible.
26.8.4Forfluxleakagetesting,thelongitudinalreferencenotchesshallbestraight-sidednotchesmachinedinaradialplaneparalleltothetubeaxisontheinsideandoutsidesurfacesofthetube.Notchdepthshallnotexceed121⁄2%ofthespecifiedwallthicknessor0.004in.[0.1mm],whicheverisgreater.Notchlengthshallnotexceed1in.[25.4mm],andthewidthshallnotexceedthedepth.Outsideandinsidenotchesshallhavesufficientseparationtoallowdistinctidentificationofthesignalfromeachnotch.
26.8.5Moreorsmallerreferencediscontinuities,orboth,maybeusedbyagreementbetweenthepurchaserandthemanufacturer.
26.9StandardizationProcedure:
26.9.1Thetestapparatusshallbestandardizedatthebeginningandendofeachseriesoftubesofthesamespecifiedsize(diameterandwallthickness),gradeandheattreatmentcondition,andatintervalsnotexceeding4hduringtheexaminationofsuchtubing.Morefrequentstandardizationsmaybeperformedatthemanufacturer’soptionormayberequireduponagreementbetweenthepurchaserandthemanufacturer.
26.9.2Thetestapparatusshallalsobestandardizedafteranychangeintestsystemsettings,changeofoperator,equip-mentrepair,orinterruptionduetopowerlossorshutdown.26.9.3Thereferencestandardshallbepassedthroughthetestapparatusatthesamespeedandtestsystemsettingsasthetubetobetested,exceptthat,atthemanufacturer’sdiscretion,thetubesmaybetestedatahighersensitivity.
26.9.4Thesignal-to-noiseratioforthereferencestandardshallbe2.5:1orgreater,andthereferencesignalamplitudeforeachdiscontinuityshallbeatleast50%offullscaleofthedisplay.Inestablishingthenoiselevel,extraneoussignalsfrom
7
26.8ReferenceStandards:
26.8.1Referencestandardsofconvenientlengthshallbepreparedfromalengthoftubeofthesamegrade,specifiedsize(outsidediameterandwallthickness),surfacefinishandheattreatmentconditionasthetubingtobeexamined.
26.8.2Foreddycurrenttesting,thereferencestandardshallcontain,attheoptionofthemanufacturer,anyoneofthefollowingdiscontinuities:
26.8.2.1DrilledHole—Thereferencestandardshallcontainthreeormoreholes,equallyspacedcircumferentiallyaroundthetubeandlongitudinallyseparatedbyasufficientdistancetoallowdistinctidentificationofthesignalfromeachhole.Theholesshallbedrilledradiallyandcompletelythroughthetubewall,withcarebeingtakentoavoiddistortionofthetubewhiledrilling.Theholesshallnotbelargerthan0.031in.[0.8mm]indiameter.Asanalternative,theproducermaychoosetodrill
A450/A450M−15
identifiablesurfaceimperfectionsonthereferencestandardmaybeignored.WhenrejectfilteringisusedduringUTtesting,linearitymustbedemonstrated.
26.9.5If,uponanystandardization,thereferencesignalamplitudehasdecreasedby29%(3.0dB),thetestapparatusshallbeconsideredoutofstandardization.Thetestsystemsettingsmaybechanged,orthetransducer(s),coil(s),orsensor(s)adjusted,andtheunitrestandardized,butalltubestestedsincethelastacceptablestandardizationmustbere-tested.
26.10EvaluationofImperfections:
26.10.1Tubingproducingatestsignaltoorgreaterthanthelowestsignalproducedbythereferencestandardshallbedesignatedsuspect,shallbeclearlymarkedoridentified,andshallbeseparatedfromtheacceptabletubing.
26.10.2Suchsuspecttubingshallbesubjecttooneofthefollowingthreedispositions:
26.10.2.1Thetubesmayberejectedwithoutfurtherexamination,atthediscretionofthemanufacturer.
26.10.2.2Ifthetestsignalwasproducedbyimperfectionssuchasscratches,surfaceroughness,dings,straightenermarks,looseIDbeadandcuttingchips,steeldiestamps,stopmarks,tubereducerripple,orchatteredflashtrim,thetubingmaybeacceptedorrejecteddependingonvisualobservationoftheseverityoftheimperfection,thetypeofsignalitproducesonthetestingequipmentused,orboth.
26.10.2.3Ifthetestsignalwasproducedbyimperfectionswhichcannotbeidentified,orwasproducedbycracksorcrack-likeimperfections,thetubingshallberejected.
26.10.3Anytubeswithimperfectionsofthetypesin26.10.2.2and26.10.2.3,exceeding0.004in.[0.1mm]or121⁄2%ofthespecifiedminimumwallthickness(whicheverisgreater)indepthshallberejected.
26.10.4Rejectedtubesmaybereconditionedandretestedprovidingthewallthicknessisnotdecreasedtolessthanthatrequiredbythisortheproductspecification.Ifgrindingisperformed,theoutsidediameterintheareaofgrindingmaybereducedbytheamountsoremoved.Tobeaccepted,recondi-tionedtubesmustpassthenondestructiveexaminationbywhichtheywereoriginallyrejected.27.TestReport
27.1Whenspecifiedinthepurchaseorderorcontract,theproducerorsuppliershallfurnishatestreportstatingthatthematerialwasmanufactured,sampled,testedandinspectedinaccordancewiththespecification,includingyeardate,thesupplementaryrequirements,andanyotherrequirementsdes-ignatedinthepurchaseorderorcontract,andthattheresultsmettherequirementsofthatspecification,thesupplementaryrequirementsandtheotherrequirements.Asignatureornota-rizationisnotrequiredonthetestreport,butthedocumentshallbedatedandshallclearlyidentifytheorganizationsubmittingthereport.Notwithstandingtheabsenceofasigna-tureornotarization,theorganizationsubmittingthereportisresponsibleforthecontentsofthereport.
27.2Inaddition,thetestreportshallincludethefollowinginformationandtestresults,whenapplicable:27.2.1HeatNumber,
8
27.2.2HeatAnalysis,
27.2.3ProductAnalysis,whenspecified,27.2.4TensileProperties,
27.2.5Widthofthegagelength,whenlongitudinalstriptensiontestspecimensareused,27.2.6FlatteningTestacceptable,
27.2.7ReverseFlatteningTestacceptable,27.2.8FlaringTestacceptable,27.2.9FlangeTestacceptable,27.2.10HardnessTestvalues,27.2.11HydrostaticTestpressure,
27.2.12Non-destructiveElectricTestmethod,27.2.13ImpactTestresults,and
27.2.14Othertestresultsorinformationrequiredtobereportedbytheproductspecification.
27.3Testresultsorinformationrequiredtobereportedbysupplementaryrequirements,orotherrequirementsdesignatedinthepurchaseorderorcontractshallbereported,butmaybereportedinaseparatedocument.
27.4Thetestreportshallincludeastatementofexplanationfortheletteraddedtothespecificationnumbermarkedonthetubes(see30.2),whenalloftherequirementsofthespecifi-cationhavenotbeencompleted.Thepurchasermustcertifythatallrequirementsofthespecificationhavebeencompletedbeforeremovaloftheletter(thatis,X,Y,orZ).
27.5Atestreport,certificateofcompliance,orsimilardocumentprintedfromorusedinelectronicformfromanelectronicdatainterchange(EDI)transmissionshallbere-gardedashavingthesamevalidityasacounterpartprintedinthecertifier’sfacility.ThecontentoftheEDItransmitteddocumentshallmeettherequirementsoftheinvokedASTMstandard(s)andconformtoanyexistingEDIagreementbe-tweenthepurchaserandsupplier.Notwithstandingtheabsenceofasignature,theorganizationsubmittingtheEDItransmis-sionisresponsibleforthecontentofthereport.28.Inspection
28.1Theinspectorrepresentingthepurchasershallhaveentryatalltimeswhileworkonthecontractofthepurchaserisbeingperformed,toallpartsofthemanufacturer’sworksthatconcernthemanufactureofthematerialordered.Themanufacturershallaffordtheinspectorallreasonablefacilitiestosatisfyhimthatthematerialisbeingfurnishedinaccordancewiththisspecification.Allrequiredtestsandinspectionshallbemadeattheplaceofmanufacturepriortoshipment,unlessotherwisespecified,andshallbeconductedsoasnottointerfereunnecessarilywiththeoperationoftheworks.29.Rejection
29.1Eachlengthoftubingreceivedfromthemanufacturermaybeinspectedbythepurchaserand,ifitdoesnotmeettherequirementsofthespecificationbasedontheinspectionandtestmethodasoutlinedinthespecification,thelengthmayberejectedandthemanufacturershallbenotified.Dispositionofrejectedtubingshallbeamatterofagreementbetweenthemanufacturerandthepurchaser.
A450/A450M−15
29.2Materialthatfailsinanyoftheformingoperationsorintheprocessofinstallationandisfoundtobedefectiveshallbesetasideandthemanufacturershallbenotifiedformutualevaluationofthematerial’ssuitability.Dispositionofsuchmaterialshallbeamatterforagreement.30.ProductMarking
30.1Eachlengthoftubeshallbelegiblystenciledwiththemanufacturers’snameorbrand,thespecificationnumber,andgrade.Themarkingneednotincludetheyeardateofthespecification.Fortubeslessthan11⁄4in.[31.8mm]indiameterandtubesunder3ft.[1m]inlength,therequiredinformationmaybemarkedonatagsecurelyattachedtothebundleorboxinwhichthetubesareshipped.
30.2WhenitisspecifiedthatcertainrequirementsofaspecificationadoptedbytheASMEBoilerandPressureVesselCommitteearetobecompletedbythepurchaseruponreceiptofthematerial,themanufacturershallindicatethatallrequire-mentsofthespecificationhavenotbeencompletedbyalettersuchasX,Y,orZ,immediatelyfollowingthespecificationnumber.Thislettermayberemovedaftercompletionofallrequirementsinaccordancewiththespecification.Anexpla-nationofspecificationrequirementstobecompletedispro-videdinSection27.
30.3BarCoding—Inadditiontotherequirementsin30.1and30.2,barcodingisacceptableasasupplementalidentifi-cationmethod.Thepurchasermayspecifiyintheorderaspecificbarcodingsystemtobeused.31.Packaging,Marking,andLoading
31.1Whenspecifiedonthepurchaseorder,packaging,marking,andloadingforshipmentshallbeinaccordancewiththeproceduresofPracticesA700.32.GovernmentProcurement
32.1ScaleFreePipe:
32.1.1Whenspecifiedinthecontractororder,thefollowingrequirementsshallbeconsideredintheinquirycontractororder,foragenciesoftheU.S.Governmentwherescalefreetubeisrequired.Theserequirementsshalltakeprecedenceifthereisaconflictbetweentheserequirementsandtheproductspecification.
32.1.2Tubeshallbeorderedtooutsidediameter(OD)andwallthickness.
32.1.3ResponsibilityforInspection—Unlessotherwisespecifiedinthecontractorpurchaseorder,themanufacturerisresponsiblefortheperformanceofallinspectionandtestrequirementsspecified.Theabsenceofanyinspectionrequire-mentsinthespecificationshallnotrelievethecontractoroftheresponsibilityforensuringthatallproductsorsuppliessubmit-tedtotheGovernmentforacceptancecomplywithallrequire-mentsofthecontract.Samplinginspection,aspartofthemanufacturingoperations,isanacceptablepracticetoascertainconformancetorequirements,however,thisdoesnotauthorizesubmissionofknowndefectivematerial,eitherindicatedoractual,nordoesitcommittheGovernmenttoacceptthematerial.Exceptasotherwisespecifiedinthecontractorpurchaseorder,themanufacturermayusehisownoranyother
9
suitablefacilitiesfortheperformanceoftheinspectionandtestrequirementsunlessdisapprovedbythepurchaseratthetimetheorderisplaced.Thepurchasershallhavetherighttoperformanyoftheinspectionsandtestssetforthwhensuchinspectionsandtestsaredeemednecessarytoensurethatthematerialconformstotheprescribedrequirements.
32.1.4SamplingforFlatteningandFlaringTestandforVisualandDimensionalExamination—Minimumsamplingforflatteningandflaringtestsandvisualanddimensionalexami-nationshallbeasfollows:
LotSize(piecesper
lot)2to89to9091to150151to280281to500501to12001201to32003201to1000010001to35000
SampleSize
Entirelot
812192127353846
Inallcases,theacceptancenumberiszeroandtherejectionnumberisone.Rejectedlotsmaybescreenedandresubmittedforvisualanddimensionalexamination.Alldefectiveitemsshallbereplacedwithacceptableitemspriortolotacceptance32.1.5SamplingforChemicalAnalysis—Onesampleforchemicalanalysisshallbeselectedfromeachoftwotubeschosenfromeachlot.Alotshallbeallmaterialpouredfromoneheat.
32.1.6SamplingforTensionandBendTest—Onesampleshallbetakenfromeachlot.Alotshallconsistofalltubeofthesameoutsidediameterandwallthicknessmanufacturedduringan8-hshiftfromthesameheatofsteel,andheattreatedunderthesameconditionsoftemperatureandtimeinasinglechargeinabatchtypefurnace,orheattreatedunderthesameconditioninacontinuousfurnace,andpresentedforinspectionatthesametime.
32.1.7HydrostaticandUltrasonicTests—Eachtubeshallbetestedbytheultrasonic(whenspecified)andhydrostatictests.32.1.8Tubeshallbefreefromheavyoxideorscale.TheinternalsurfaceofhotfinishedferriticsteeltubeshallbepickledorblastcleanedtoafreeofscaleconditionequivalenttotheCSa2visualstandardlistedinSSPC-SP6.Cleaningshallbeperformedinaccordancewithawrittenprocedurethathasbeenshowntobeeffective.Thisprocedureshallbeavailableforaudit.
32.1.9InadditiontothemarkinginSpecificationA530/A530M,eachlengthoftube1⁄4in.outsidediameterandlargershallbemarkedwiththefollowinglistedinformation.MarkingshallbeinaccordancewithFed.Std.No.183andMIL-STD-792.(a)Outsidediameter,wallthickness,andlength(b)Heatorlotidentificationnumber.
32.1.10TubeshallbestraighttowithinthetolerancesspecifiedinTable8:
32.1.11Whenspecified,eachtubeshallbeultrasonicallyexaminedinaccordancewithMIL-STD-271,exceptthatthenotchdepthinthecalibrationstandardshallbe5%ofthewallthicknessor0.005in.,whicheverisgreater.Anytubewhichproducesanindicationequaltoorgreaterthan100%oftheindicationfromthecalibrationstandardshallberejected.
A450/A450M−15
TABLE8StraightnessTolerances
SpecifiedOD(in.)Upto5.0,inclOver5.0to8.0,
incl
Over8.0to12.75,
incl.
SpecifiedWallThickness(in.)Over3%ODto
0.5,inclOver4%ODto
0.75,inclOver4%ODto
1.0,incl
MaximumMaximumCurvatureinAny3CurvatureinTotal
ft(in.)Length(in.)
0.0300.0450.060
0.010×length,ft0.015×length,ft0.020×length,ft
32.1.12Thetubeshallbefreefromrepairwelds,welded
joints,laps,laminations,seams,visiblecracks,tears,grooves,slivers,pits,andotherimperfectionsdetrimentaltothetubeasdeterminedbyvisualandultrasonicexamination,oralternatetests,asspecified.
32.1.13Tubeshallbeuniforminqualityandconditionandhaveafinishconformingtothebestpracticeforstandard
qualitytubing.Surfaceimperfectionssuchashandlingmarks,straighteningmarks,lightmandrelanddiemarks,shallowpits,andscalepatternwillnotbeconsideredinjuriousiftheimperfectionsareremovablewithinthetolerancesspecifiedforwallthicknessor0.005in.,whicheverisgreater.Thebottomofimperfectionsshallbevisibleandtheprofileshallberoundedandfaired-in.
32.1.14Noweldrepairbythemanufacturerispermitted.32.1.15PreservationshallbelevelAorcommercial,andpackingshallbelevelA,B,orcommercial,asspecified.LevelApreservationandlevelAorBpackingshallbeinaccordancewithMIL-STD-163andcommercialpreservationandpackingshallbeinaccordancewithPracticesA700orPracticeD3951.33.Keywords
33.1alloysteeltube;austeniticstainlesssteel;carbonsteeltube;generaldelivery;stainlesssteeltube;steeltube
SUMMARYOFCHANGES
CommitteeA01hasidentifiedthelocationofselectedchangestothisspecificationsincethelastissue,A450/A450M–10,whichmayimpacttheuseofthisspecification.(ApprovedMay1,2015)
(1)IncorporatedTestMethodsA1058throughout.(2)AddedSection4.
(3)Addedmetricequivalentoffootin8.1andTable1.
(4)Deletedtheword“certified”fromtheterm“certifiedtestreport”inSection27.
(5)DeletedNote2of27.5andmoveditsrequirementstothetextof27.5.
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Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.YourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStandards,attheaddressshownbelow.
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