JB/T 2770-1992 PN16.0～32.0MPa接头螺母
作者:标准资料网 时间:2024-05-20 07:47:22 浏览:8702
来源:标准资料网
基本信息
| 标准名称： | PN16.0～32.0MPa接头螺母 |
| 中标分类： |
机械 >>
通用零部件 >>
阀门 |
| 替代情况： | 替代JB 2770-79;被JB/T 1754-2008代替 |
| 发布部门： | 合肥通用机械研究所 |
| 发布日期： | 1992-07-20 |
| 实施日期： | 1993-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2008-07-01 |
| 归口单位： | 合肥通用机械研究所 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
| 批文号： | 机电科标[1992]1175号 |
适用范围
本标准规定了锻造高压阀门用外螺纹连接接头螺母型式、尺寸、技术要求等。 本标准适用于公称压力pN16.0~32.0MPa、公称通径DN3~200mm的接头螺母。
前言
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所属分类： 机械 通用零部件 阀门
【英文标准名称】:Ammoniasolution
【原文标准名称】:氨溶液
【标准号】:JISK8085-1995
【标准状态】:作废
【国别】:日本
【发布日期】:1995-01-01
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:TechnicalCommitteeonChemicalAnalysis
【标准类型】:()
【标准水平】:()
【中文主题词】:氨;氨溶液
【英文主题词】:
【摘要】:
【中国标准分类号】:G62
【国际标准分类号】:71_040_30
【页数】:11P;A4
【正文语种】:日语
【英文标准名称】:StandardPracticeforDeterminingtheInclusionorSecond-PhaseConstituentContentofMetalsbyAutomaticImageAnalysis
【原文标准名称】:用自动图象分析法测定钢和其他金属杂质含量的规程
【标准号】:ASTME1245-2003(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2003
【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】:E04.14
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:exogenousinclusion;feature-specificmeasurements;fieldmeasurements;imageanalysis;inclusions;indigenousinclusions;lightmicroscopy;oxide;second-phaseparticles;statisticalanalysis;stereology;sulfide;Photomicrography;Second-phase
【摘要】:Thispracticeisusedtoassesstheindigenousinclusionsorsecond-phaseconstituentsofmetalsusingbasicstereologicalproceduresperformedbyautomaticimageanalyzers.Thispracticeisnotsuitableforassessingtheexogenousinclusionsinsteelsandothermetals.Becauseofthesporadic,unpredictablenatureofthedistributionofexogenousinclusions,othermethodsinvolvingcompleteinspection,forexample,ultrasonics,mustbeusedtolocatetheirpresence.Theexactnatureoftheexogenousmaterialcanthenbedeterminedbysectioningintothesuspectregionfollowedbyserial,step-wisegrindingtoexposetheexogenousmatterforidentificationandindividualmeasurement.Directsizemeasurementratherthanapplicationofstereologicalmethodsisemployed.Becausethecharacteristicsoftheindigenousinclusionpopulationvarywithinagivenlotofmaterialduetotheinfluenceofcompositionalfluctuations,solidificationconditionsandprocessing,thelotmustbesampledstatisticallytoassessitsinclusioncontent.Thelargestlotsampledistheheatlotbutsmallerlots,forexample,theproductofaningot,withintheheatmaybesampledasaseparatelot.Thesamplingofagivenlotmustbeadequateforthelotsizeandcharacteristics.Thepracticeissuitableforassessmentoftheindigenousinclusionsinanysteel(orothermetal)productregardlessofitssizeorshapeaslongasenoughdifferentfieldscanbemeasuredtoobtainreasonablestatisticalconfidenceinthedata.Becausethespecificsofthemanufactureoftheproductdoinfluencethemorphologicalcharacteristicsoftheinclusions,thereportshouldstatetherelevantmanufacturingdetails,thatis,dataregardingthedeformationhistoryoftheproduct.Tocomparetheinclusionmeasurementresultsfromdifferentlotsofthesameorsimilartypesofsteels,orothermetals,astandardsamplingschemeshouldbeadoptedsuchasdescribedinPracticeE45.Thetestmeasurementproceduresarebasedonthestatisticallyexactmathematicalrelationshipsofstereologyforplanarsurfacesthroughathree-dimensionalobjectexaminedusingreflectedlight(seeNote1).Theorientationofthesectioningplanerelativetothehot-workingaxisoftheproductwillinfluencetestresults.Ingeneral,alongitudinallyorientedtestspecimensurfaceisemployedinordertoassessthedegreeofelongationofthemalleable(thatis,deformable)inclusions.Oxideinclusionmeasurementsforcastmetals,orforwroughtsectionsthatarenotfullyconsolidated,maybebiasedbypartialorcompletedetectionoffineporosityormicroshrinkagecavitiesandarenotrecommended.Sulfidescanbediscriminatedfromsuchvoidsinmostinstancesandsuchmeasurementsmaybeperformed.Resultsofsuchmeasurementsmaybeusedtoqualifymaterialforshipmentaccordingtoagreeduponguidelinesbetweenpurchaserandmanufacturer,forcomparisonofdifferentmanufacturingprocessesorprocessvariations,ortoprovidedataforstructure-property-behaviorstudies.1.1Thispracticedescribesaprocedureforobtainingstereologicalmeasurementsthatdescribebasiccharacteristicsofthemorphologyofindigenousinclusionsinsteelsandothermetalsusingautomaticimageanalysis.Thepracticecanbeappliedtoprovidesuchdataforanydiscretesecondphase.Note18212;Stereologicalmeasurementmethodsareusedinthispracticetoassesstheaveragecharacteristicsofinclusionsorothersecond-phaseparticlesonalongitudinalplane-of-polish.Thisinformation,byitself,doesnotproduceathree-dimensionaldescriptionoftheseconstituentsinspaceasdeformationprocessescauserotationandalignmentoftheseconstituentsinapreferredmanner.Developmentofsuchinforma......
【中国标准分类号】:H26
【国际标准分类号】:77_040_99
【页数】:8P.;A4
【正文语种】:英语
