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【英文标准名称】:StandardSpecificationforForgedorRolled8and9%NickelAlloySteelFlanges,Fittings,Valves,andPartsforLow-TemperatureService
【原文标准名称】:低温环境用锻造或轧制8%和9%镍合金钢法兰,配件和部件标准规格
【标准号】:ASTMA522/A522M-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:A01.22
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:lowtemperatureapplications;nickelalloysteel;pipefittings;steel;pipingapplications;pressurecontainingparts;steelflanges;steelforgings;alloy;steelvalves
【摘要】:1.1Thisspecificationcovers8and9%nickel-alloysteelforgedorrolledflanges,fittings,valves,andpartsintendedforuseinweldedpressurevesselsforlow-temperatureservice.Thespecificationisapplicabletoforgingswithmaximumsectionthicknessof3in.[75mm]inthedoublenormalizedandtemperedconditionand5in.[125mm]inthequenchedandtemperedcondition.Forgingsunderthisspecificationareintendedforserviceatoperatingtemperaturesnotlowerthan-320176;F[-196176;C]forTypeIor-275176;F[-170176;C]forTypeIIorhigherthan250176;F[121176;C].1.2Materialunderthisspecificationisavailableintwotypeshavingdifferentchemicalcompositionsasfollows:TypeNominalNickelContent,%I9II8【英文标准名称】:Acoustics-Determinationofsoundpowerradiatedintoaductbyfansandotherair-movingdevices-In-ductmethod
【原文标准名称】:声学.风机或其他空气移动装置辐射入管道中的声功率的测定.管道法
【标准号】:BSENISO5136-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-04-30
【实施或试行日期】:2010-04-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Definitions;Determination;Ductmethods;Ductedfans;Fans;Loudnesslevels;Measurement;Measuringresults;Measuringtechniques;Noise(environmental);Noisemeasurements;Powerlevels;Sound;Soundintensity;Soundlevel;Soundlevels;Soundpower;Testing;Ventilators;Volume(sound)
【摘要】:ThisInternationalStandardspecifiesamethodfortestingductedfansandotherair-movingdevicestodeterminethesoundpowerradiatedintoananechoicallyterminatedductontheinletand/oroutletsideoftheequipment.Themethodisapplicabletofanswhichemitsteady,broad-band,narrow-bandanddiscrete-frequencysoundandtoairtemperaturesbetween?50°Cand+70°C.Thetestductdiameterrangeisfrom0,15mto2m.Testmethodsforsmall(d<0,15m)andlarge(d>2m)testductsaredescribedintheinformativeAnnexesHandI,respectively.Themaximummeanflowvelocityatthemicrophoneheadforwhichthemethodissuitabledependsonthetypeofmicrophoneshieldused,andisasfollows:?foamball15m/s;?nosecone20m/s;?samplingtube40m/s.Abovethesevaluesthesuppressionofturbulentpressurefluctuationsbythemicrophoneshield(see3.9)maybeinsufficient.ItisexpectedthatsoundpowertestswillbeconductedinconjunctionwithairflowperformancetestsinaccordancewithISO5801.Theductingarrangementwillthereforenormallyincorporatea“star”typeflowstraightenerontheoutletsideofthefanwhichwillminimizeswirl(see7.3).Whereitispermissibletodeletethestraighteneras,forexample,withlargefanstoinstallationcategoryCaccordingtoISO5801:1997,themethodislimitedtoaswirlangleof15°.(AnexampleofamethodfordeterminingtheangleofswirlisgiveninAnnexJ.)
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;23_120
【页数】:80P.;A4
【正文语种】:英语