2023年全國(guó)碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Designation:A312A312M?18UsedinUSDOENEstardsStardSpecificationfSeamlessWeldedHeavilyColdWkedAusteniticStainlessSteelPipes1ThisstardisissuedunderthefixeddesignationA312A312Mthenumberimmediatelyfollowingthedesignationindica

2、testheyearofiginaladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thisspecification2co

3、versseamlessstraightseamweldedheavilycoldwkedweldedausteniticstainlesssteelpipeintendedfhightemperaturegeneralcrosiveservice.NOTE1—Whentheimpacttestcriterionfalowtemperatureservicewouldbe15ftlbf[20J]energyabsption15mils[

4、0.38mm]lateralexpansionsomeoftheausteniticstainlesssteelgradescoveredbythisspecificationareacceptedbycertainpressurevesselpipingcodeswithoutthenecessityofmakingtheactualtest.FexampleGradesTP304TP304LTP347areacceptedbythe

5、ASMEPressureVesselCodeSectionVIIIDivision1bytheChemicalPlantRefineryPipingCodeASMEB31.3fserviceattemperaturesaslowas?425F[?250C]withoutqualificationbyimpacttests.OtherAISIstainlesssteelgradesareusuallyacceptedfservicetem

6、peraturesaslowas?325F[?200C]withoutimpacttesting.Impacttestingmayundercertaincircumstancesberequired.FexamplematerialswithchromiumnickelcontentoutsidetheAISIrangesfmaterialwithcarboncontentexceeding0.10%arerequiredtobeim

7、pacttestedundertherulesofASMESectionVIIIDivision1whenservicetemperaturesarelowerthan?50F[?45C].1.2GradesTP304HTP309HTP309HCbTP310HTP310HCbTP316HTP321HTP347HTP348HaremodificationsofGradesTP304TP309CbTP309STP310CbTP310STP3

8、16TP321TP347TP348areintendedfserviceattemperatureswherecreepstressrupturepropertiesareimptant.1.3Optionalsupplementaryrequirementsareprovidedfpipewhereagreaterdegreeoftestingisdesired.Thesesupplementaryrequirementscallfa

9、dditionalteststobemadewhendesireditispermittedtospecifyinthederonemeofthesesupplementaryrequirements.1.4TableX1.1liststhestardizeddimensionsofweldedseamlessstainlesssteelpipeasshowninASMEB36.19.Thesedimensionsarealsoappl

10、icabletoheavilycoldwkedpipe.Pipehavingotherdimensionsispermittedtobederedfurnishedprovidedsuchpipecomplieswithallotherrequirementsofthisspecification.1.5GradesTP321TP321Hhavelowerstrengthrequirementsfpipemanufacturedbyth

11、eseamlessprocessinnominalwallthicknessesgreaterthan3?8in.[9.5mm].1.6ThevaluesstatedineitherSIunitsinchpoundunitsaretoberegardedseparatelyasstard.WithinthetexttheSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynot

12、beexactequivalentstherefeeachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconfmancewiththestard.Theinchpoundunitsshallapplyunlessthe“M”designationofthisspecificationisspecifiedin

13、theder.NOTE2—ThedimensionlessdesignatNPS(nominalpipesize)hasbeensubstitutedinthisstardfsuchtraditionaltermsas“nominaldiameter”“size”“nominalsize.”1.7Thisinternationalstardwasdevelopedinaccdancewithinternationallyrecogniz

14、edprinciplesonstardizationestablishedintheDecisiononPrinciplesftheDevelopmentofInternationalStardsGuidesRecommendationsissuedbytheWldTradeganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStard

15、s:3A262PracticesfDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteelsA370TestMethodsDefinitionsfMechanicalTestingofSteelProductsA941TerminologyRelatingtoSteelStainlessSteelRelatedAlloysFerroalloysA999A

16、999MSpecificationfGeneralRequirementsfAlloyStainlessSteelPipeA1016A1016MSpecificationfGeneralRequirementsfFerriticAlloySteelAusteniticAlloySteelStainlessSteelTubesE112TestMethodsfDeterminingAverageGrainSize1Thisspecifica

17、tionisunderthejurisdictionofASTMCommitteeA01onSteelStainlessSteelRelatedAlloysisthedirectresponsibilityofSubcommitteeA01.10onStainlessAlloySteelTubularProducts.CurrenteditionapprovedSept.12018.PublishedOctober2018.iginal

18、lyapprovedin1948.Lastpreviouseditionapprovedin2017asA312A312M–17.DOI:10.1520A0312_A0312M18.2FASMEBoilerPressureVesselCodeapplicationsseerelatedSpecificationSA312inSectionIIofthatCode.3FreferencedASTMstardsvisittheASTMweb

19、sitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.ASummaryofChangessectionappearsattheendofthisstardCopyright?ASTMInternational100BarrHa

20、rbDrivePOBoxC700WestConshohockenPA194282959.UnitedStatesThisinternationalstardwasdevelopedinaccdancewithinternationallyrecognizedprinciplesonstardizationestablishedintheDecisiononPrinciplesftheDevelopmentofInternationalS

21、tardsGuidesRecommendationsissuedbytheWldTradeganizationTechnicalBarrierstoTrade(TBT)Committee.1TABLE1ChemicalRequirementsGradeUNSDesignationAComposition%BCarbonManganesePhosphusSulfurSiliconChromiumNickelMolybdenumTitani

22、umNiobiumMTantalummaxNitrogenCVanadiumCopperCeriumBonAluminumOtherTP201S201000.155.5–7.50.0600.0301.0016.0–18.03.5–5.5............0.25...............TP201LNS201530.036.4–7.50.0450.0150.7516.0–17.54.0–5.0............0.10–

23、0.25...1.00............S204000.0307.0–9.00.0450.0301.0015.0–17.01.50–3.00............0.15–0.30...............TPXM19S209100.064.0–6.00.0450.0301.0020.5–23.511.5–13.51.50–3.00...0.10–0.30...0.20–0.400.10–0.30......TPXM10S2

24、19000.088.0–10.00.0450.0301.0019.0–21.55.5–7.5............0.15–0.40.........TPXM11S219040.048.0–10.00.0450.0301.0019.0–21.55.5–7.5............0.15–0.40.........TPXM29S240000.0811.5–14.50.0600.0301.0017.0–19.02.3–3.7.....

25、.......0.20–0.40.........TP304S304000.082.000.0450.0301.0018.0–20.08.0–11.0........................TP304LS304030.035D2.000.0450.0301.0018.0–20.08.0–13.0........................TP304HS304090.04–0.102.000.0450.0301.0018.0–

26、20.08.0–11.0...........................S304150.04–0.060.800.0450.0301.00–2.0018.0–19.09.0–10.0............0.12–0.18......0.03–0.08TP304NS304510.082.000.0450.0301.0018.0–20.08.0–11.0............0.10–0.16.........TP304LNS3

27、04530.0352.000.0450.0301.0018.0–20.08.0–12.0............0.10–0.16............S306000.0182.000.020.023.7–4.317.0–18.514.0–15.50.20...............0.50max......S306010.0150.50–0.800.0300.0135.0–5.617.0–18.017.0–18.00.20....

28、.....0.05...0.35...............S306150.16–0.242.000.0300.033.2–4.017.0–19.513.5–16.0...........................0.80–1.50...S308150.05–0.100.800.0400.0301.40–2.0020.0–22.010.0–12.0............0.14–0.20......0.03–0.08TP309

29、SS309080.082.000.0450.0301.0022.0–24.012.0–15.00.75..................TP309HS309090.04–0.102.000.0450.0301.0022.0–24.012.0–15.0.....................TP309CbS309400.082.000.0450.0301.0022.0–24.012.0–16.00.75...10Cmin1.10max

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