ASTM G57-2006 用温纳四电极法现场测量泥土电阻率的标准试验方法
时间:2024-05-19 02:12:27 来源: 标准资料网 作者：标准资料网 阅读：9359
【英文标准名称】:StandardTestMethodforFieldMeasurementofSoilResistivityUsingtheWennerFour-ElectrodeMethod
【原文标准名称】:用温纳四电极法现场测量泥土电阻率的标准试验方法
【标准号】:ASTMG57-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:G01.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:污染;现场试验;测量;金属;电阻器;磨损
【英文主题词】:fourelectrodesmethod;soilresistivity
【摘要】:Measurementofsoilresistivityisusedforthecontrolofcorrosionofburiedstructures.Soilresistivityisusedbothfortheestimationofexpectedcorrosionratesandforthedesignofcathodicprotectionsystems.Asanessentialdesignparameterforcathodicprotectionsystems,itisimportanttotakeasmanymeasurementsasnecessarysoastogetasufficientlyrepresentativecharacterizationofthesoilenvironmentthattheentireburiedstructurewillexperience.1.1Thismethodcoverstheequipmentandproceduresforthefieldmeasurementofsoilresistivity,bothinsituandforsamplesremovedfromtheground,foruseinthecontrolofcorrosionofburiedstructures.1.2Toconvertcm(metricunit)tometre(SIunit),divideby100.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:5P.;A4
【正文语种】:
【英文标准名称】:StandardPracticeforExtractionofMedicalPlastics
【原文标准名称】:医学塑料制品萃取的标准实施规范
【标准号】:ASTMF619-2003
【标准状态】:现行
【国别】:
【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(ASTM)
【起草单位】:F04.16
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:医学科学;萃取;医疗设备;塑料;工艺
【英文主题词】:biocompatibility;extraction;liquids;plastics;specimensize;
【摘要】:Theseextractionproceduresaretheinitialpartofseveraltestproceduresusedinthebiocompatibilityscreeningofplasticsusedinmedicaldevices.Thelimitationsoftheresultsobtainedfromthispracticeshouldberecognized.Thechoiceofextractionvehicle,durationofimmersion,andtemperatureofthetestisnecessarilyarbitrary.Thespecificationoftheseconditionsprovidesabasisforstandardizationandservesasaguidetoinvestigatorswishingtocomparetherelativeresistanceofvariousplasticstoextractionvehicles.Correlationoftestresultswiththeactualperformanceorserviceabilityofmaterialsisnecessarilydependentuponthesimilaritybetweenthetestingandend-useconditions(see12.1.2andNote4).Cautionshouldbeexercisedintheunderstandingandintentofthispracticeasfollows:5.4.1Noallowanceordistinctionismadeforvariablessuchasend-useapplicationanddurationofuse.DecisionsonselectionofteststobedoneshouldbemadebasedonPracticeF748.5.4.2Thispracticewasoriginallydesignedforusewithnonporous,solidmaterials.Itsapplicationforothermaterials,suchasthosethatareporous,orabsorptive,orresorptive,shouldbeconsideredwithcaution.Considerationshouldbegiventoalteringthespecifiedmaterialtoliquidratiotoallowadditionalliquidtofullyhydratethematerialandadditionalliquidorothermethodstofullysubmergethetestarticle.Additionalproceduresthatfullyremovetheextractliquidfromthetestarticle,suchaspressureorphysicallysqueezingthematerial,shouldalsobeconsideredasappropriate.Althoughnodefinitionsaregiveninthispracticeforthefollowingterms,suchitemsasextractionvehiclesurfacetensionatthespecifiedextractionconditionandplasticspecimenphysicalstructureshouldbetakenintoaccount.TestMethodsD543,D570,andD1239maybeusefulinprovidingsupplementalinformation.1.1Thispracticecoversmethodsofextractionofmedicalplasticsandmaybeapplicabletoothermaterials.Thispracticeidentifiesamethodforobtaining"extractliquid"foruseindeterminingthebiologicalresponseinpreclinicaltesting.Furthertestingofthe"extractliquid"isspecifiedinotherASTMstandards.Theextractmayundergochemicalanalysisaspartofthepreclinicalevaluationofthebiologicalresponse,andthematerialafterextractionmayalsobeexamined.1.2Thispracticemaybeusedfor,butisnotlimitedtothefollowingareas:partialevaluationofrawmaterials,auditingmaterialswithinthemanufacturingprocess,andtestingfinalproducts.Thispracticemayalsobeusedasarefereemethodforthemeasurementofextractablesinplasticsusedinmedicaldevices.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G33
【国际标准分类号】:11_120_01;83_080_01
【页数】:4P.;A4
【正文语种】:
Product Code:SAE J1754/1
Title:Hose Assemblies, Rubber, Hydraulic, Steel Wire Reinforced--Part 1: Procurement Document
Issuing Committee:Hydraulic Hose And Hose Fittings Committee
Scope:This SAE Standard covers steel wire reinforced rubber hose assemblies using connectors specified in SAE J516 for use in hydraulic systems using petroleum based hydraulic fluids with maximum working pressures of 1.7 to 42 MPa. See SAE J1754-2, Table 8 for hose operating temperature ranges and identification codes.Note: Working pressure is defined as maximum system pressure.