ANSI/IEC 60974-3-2008 弧焊设备.第3部分:弧放电/稳定装置

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【英文标准名称】:ArcWeldingEquipment-Part3:ArcStriking/StabilizingDevices
【原文标准名称】:弧焊设备.第3部分:弧放电/稳定装置
【标准号】:ANSI/IEC60974-3-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电弧焊接;电弧焊接设备;接触安全装置;定义;电接触保护;电力系统;电焊;电气工程;电气保护设备;电气安全性;电子电源;加热;点火装置;点火系统;职业安全;防电击;常规检验;安全性;安全装置;安全性要求;规范(验收);退火设备;测试;热防护;焊接;焊接电路;焊接电流;焊接工程;焊接设备;焊接电源;工作场所安全性
【英文主题词】:Arcwelding;Arc-weldingequipment;Contactsafetydevices;Definitions;Electriccontactprotection;Electricpowersystems;Electricwelding;Electricalengineering;Electricalprotectionequipment;Electricalsafety;Electronicpowersupplies;Heating;Ignitiondevices;Ignitionsystems;Occupationalsafety;Protectionagainstelectricshocks;Routinechecktests;Safety;Safetydevices;Safetyrequirements;Specification(approval);Stabilizingequipment;Testing;Thermalprotection;Welding;Weldingcircuit;Weldingcurrent;Weldingengineering;Weldingequipment;Weldingpowersupply;Workplacesafety
【摘要】:Safetyandperformancerequirementsforarcstriking/stabilizingdevicesapplicableforwelding,cuttingandalliedprocesses,anddesignedforindustrialandprofessionaluse
【中国标准分类号】:J64
【国际标准分类号】:25_160_30
【页数】:
【正文语种】:英语


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【英文标准名称】:Resilientfloorcoverings-Classification.
【原文标准名称】:弹性地板覆盖物.分类
【标准号】:NFP62-133/A1-2003
【标准状态】:作废
【国别】:法国
【发布日期】:2003-09-01
【实施或试行日期】:2003-09-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:弹性织物;塑料;材料试验;地板覆盖物;分类;应用范围;分类系统;叠层板材;图形符号;弹性的
【英文主题词】:rangeofapplication;laminates;classification;materialstesting;elastic;classificationsystems;plastics;graphicsymbols;floorcoverings;elasticfabrics
【摘要】:
【中国标准分类号】:Q18
【国际标准分类号】:97_150
【页数】:5P;A4
【正文语种】:其他


【英文标准名称】:StandardTestMethodforMeasurementofPneumaticPermeabilityofPartiallySaturatedPorousMaterialsbyFlowingAir
【原文标准名称】:用流动空气测定局部饱水孔隙材料气动渗透性的标准试验方法
【标准号】:ASTMD6539-2000(2006)e2
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【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】:D18.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:airflow;flexiblewallpermeameter;permeability;permeameter;pneumaticpermeability;rigidwallpermeameter;Flowingairtest;Partially-saturatedporousmaterials;Pneumaticpermeability;Porousmedia/materials
【摘要】:Thistestmethodappliestotheone-dimensionallaminar(viscous)flowofairinporousmaterialssuchassoil.Note18212;Thistestmethoddealswithporousmaterialswithbothgaseous(air)andliquid(porewater)mobilefluids:Theliquidphaseismuchlesscompressible,hasahigherviscosity,andismuchmoretightlyboundtothesolidphasebychemicalforces.Theassumptionofsingle-phaseflowmaystillbepresumedtobevalidsincethetestgradientensuringtheconditionsoflaminarflowmaybelowenoughthatflowoftheliquidphaseisnegligible.Thedegreeofsaturationofthespecimenshallbelessthanthatwhichwouldproducesignificantinternaltransportofporewateroralterthecontinuityofairvoidsundertheappliedpneumaticgradients.Themaximumpermissibledegreeofsaturationmustbeevaluatedbyanexperiencedanalyst.Innoinstanceshallthespecimenbesosaturatedthatporewaterappearsattheexitofthepermeametercellduringthetest.Thistestmethodisbasedontheassumptionthattherateofmassflowthroughthespecimenisconstantwithtime.Note28212;Whenaspecimencontainsvolatilematerialsthisassumptionisviolated.Themassofgasflowingoutwillbegreaterthanthatflowingin,thepneumaticgradientisindeterminateandthetestmaybecomemeaningless.Suchspecimensposespecialproblemsandmustbedecontaminatedbeforeanalysisinordertominimizehealthandsafetyconcernsandtopreventcontaminationofthetestapparatus.Thepneumaticpermeabilityofporousmaterialsmaybestronglydependentonavarietyofphysicalpropertiesincludingthevoidratio,thedegreeofsaturation,percentanddirectionofcompaction,andsoforth.Itisbeyondthescopeofthistestmethodtoelaboratethesedependencies.Rather,thistestmethodisintendedtobeameasurementtechniquefordeterminingthepneumaticpermeabilityunderacertainsetoflaboratoryconditions.Itistheresponsibilityoftherequestortospecifywhichsoilparametersmustbecontrolledtoensureavalidextensionofthetestresultstofieldconditions.ItisassumedthatDarcy''sLawisvalid.ThevalidityofDarcy''slawmaybeevaluatedbyplottingthevolumetricflowthroughthespecimenagainstthedifferentialpressuredropacrossthespecimen.Iftheindividualtestpointsliewithin25%ofastraightlinepassingthroughtheorigin,thenDarcy''slawmaybetakenasvalid.Note38212;Darcy''slawisvalidonlywhensaturationdoesnotchangeovertime.Longmeasurementtimesassociatedwiththeuseofbubblemetersandmanometersmayindirectlybeanuncontrolledsourceofvariabilitywhenplottingflowversuspressuredrop(see8.2).Therecommendeduseofdigitalelectronicflowandpressuresensorsleadstoconsiderablyreducedmeasurementtimesbecausetheusercanquicklydeterminebyinspectionwhenasteadystateconditionhasbeenreached.Atthatpointonlyasinglereadingneedstobetakenforareliablemeasurement.Arapidcourseofmeasurementwillminimizedehydrationofpartiallysaturatedspecimens.Note48212;Humidifyingthetestgastominimizespecimendehydrationisnotrecommendedbecause:(1)thereisnopracticalwaytoeithermeasureorcontroltherelativehumidityofthetestgas,eitherattheinletoroutletofthespecimen;(2)thecalibrationoftheelectronicflowmeterisfordryaironlyandwouldbecomeunreliableinthepresenceofwatervapor,especiallyinviewofthepotentialforirreversibleadsorptionofmoistureonthesensorelements;(3)thereisadangerofpermanentwatercondensationinthestatictransfer..........
【中国标准分类号】:P13
【国际标准分类号】:13_080_20
【页数】:10P.;A4
【正文语种】:英语