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【英文标准名称】:StandardPracticeforConditioningandHandlingofNonmetallicMaterialsforNaturalandArtificialWeatheringTests
【原文标准名称】:自然与人工气候试验用非金属材料的状态调节和处理的标准实施规程
【标准号】:ASTMG147-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:G03.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:conditioning;handling;shipping;standardatmosphere;testspecimens;weathering;Artificialweathering;Conditioning;Handlingmaterial;Naturalweathering;Nonmetallicmaterials;Shipping;Standardatmospheres;Weathering
【摘要】:Weatheringisaninherentlyvariablescienceduetothefactthatweatheritselfisvariable.Inaddition,therecanbevariabilityinresultsinartificialacceleratedtestingevenwhenalldevicesarerunningidenticalexposurecycles.Therefore,itisessentialtocontrolallfactorsasmuchaspossibleinordertoreducetheoverallsourceoferror.Properhandlingofspecimensisextremelyimportantformaintainingtheintegrityofthematerialbeingevaluated.Damagetospecimenscausedbyimproperhandlingandlabelingcanadverselyaffectthevalidityofthetestingprogram,causinglossofmoneyandtime.Improperhandlingcanintroducenonstandardproceduresintotheprotocolwhichmaybeasignificantsourceofvariability,adverselyaffectingtheoverallprecisionofresultsobtained.Improperhandlingmayalsointroduceabiasintheresultsobtained.Changestomaterialscanoccurevenunderaseeminglybenignconditioningenvironment,especiallyifthespecimenhasalreadybeenexposed.Thereforeitisnecessarytominimizethenumberandlengthofnon-testingperiodsinorderthattheexposureistheonlycauseoffurtherchanges.1.1Thispracticecoversspecimenpreparation,identification,packing,shipping,handling,andconditioningbefore,during,andafternaturalandartificialweatheringtesting.1.2Thispracticeincludesdetailsontheconditioningofspecimensafterexposureandbeforeexamination.Thispracticealsocoverslong-termstorageoffilespecimens.1.3Conditioninginthispracticedoesnotrefertothespecificactofexposingthespecimenstotheweatheringfactors.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThereisnoequivalentISOstandarddescribingproceduresforidentification,shipping,conditioning,andhandlingofspecimensintendedfornaturalorartificialweatheringtests.ISO139andISO291describeproceduresusedforconditioningspecimenspriortoandduringphysicalpropertytesting.
【中国标准分类号】:A20
【国际标准分类号】:19_020
【页数】:7P.;A4
【正文语种】:英语