JB/T 7410-2010 塑料球压痕硬度计 技术条件
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来源:标准资料网
基本信息
| 标准名称： | 塑料球压痕硬度计 技术条件 |
| 英文名称： | Specification for the ball indentation hardness testers of plastics |
| 中标分类： |
仪器、仪表 >>
试验机与无损探伤仪器 >>
非金属材料试验机 |
| ICS分类： |
|
| 替代情况： | 替代JB/T 7410-1994 |
| 发布部门： | 中华人民共和国工业和信息化部 |
| 发布日期： | 2010-02-11 |
| 实施日期： | 2010-07-01 |
| 首发日期： | |
| 作废日期： | |
| 归口单位： | 全国试验机标委会 |
| 起草单位： | 长春试验机研究所有限公司 |
| 出版社： | 机械工业出版社 |
| 出版日期： | 2010-07-01 |
适用范围
本标准规定了塑料球压痕硬度计的技术要求、检验方法、检验规则、成套性、标志、包装与随行文件等内容。
本标准适用于按GB/T 3398.1测定塑料和硬质橡胶等材料球压痕硬度用的塑料球压痕硬度计。
前言
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引用标准
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所属分类： 仪器 仪表 试验机与无损探伤仪器 非金属材料试验机
【英文标准名称】:StandardPracticeforEvaluatingthePerformanceofDiffusiveSamplers
【原文标准名称】:评价扩散采样器性能的标准实施规程
【标准号】:ASTMD6246-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008-01-01
【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】:D22.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:accuracy;airmonitoring;bias;concentration;diffusive;evaluation;gases;passive;performance;precision;samplingandanalysis;samplers;tests;uncertainty;vapors;workplaceatmospheres;Airmonitoring;Concentration(ofelements);
【摘要】:Gasorvaporsamplingisoftenaccomplishedbyactivelypumpingairthroughacollectionmediumsuchasactivatedcharcoal.Problemsassociatedwithapumpx2013;inconvenience,inaccuracy,andexpensex2013;areinextricablefromthistypeofsampling.Thealternativecoveredbythispracticeistousediffusionformovingthecompoundofinterestontothecollectionmedium.Thisapproachtosamplingisattractivebecauseoftheconvenienceofuseandlowtotalmonitoringcost.However,previousstudieshavefoundsignificantproblemswiththeaccuracyofsomesamplers.Therefore,althoughdiffusivesamplersmayprovideaplethoraofdata,inaccuraciesandmisuseofdiffusivesamplersmayyetaffectresearchstudies.Furthermore,workerprotectionsmaybebasedonfaultyassumptions.Theaimofthispracticeistocountertheuncertaintiesindiffusivesamplingthroughachievingabroadlyacceptedsetofperformancetestsandacceptancecriteriaforprovingtheefficacyofanygivendiffusivesamplerintendedforuse.1.1Thispracticecoverstheevaluationoftheperformanceofdiffusivesamplersofgasesandvaporsforuseoversamplingperiodsfrom4to12handforwindspeedslessthan0.5m/s.Suchsamplingperiodsandwindspeedsarethemostcommonintheindoorworkplacesetting.Thispracticedoesnotapplytostaticorareasamplinginwindspeedslessthan0.1m/s,whendiffusionoutsidethesamplermaydominateneededconvectionfromtheambientairtothevicinityofthesampler.Givenasuitableexposurechamber,thepracticecanbeextendedtocoversampleruseforothersamplingperiodsandconditions.Theaimistoprovideaconcisesetofexperimentsforclassifyingsamplersprimarilyinaccordancewithasinglesampleraccuracyfigure.Accuracyisdefined(3.2.1)inthisstandardsoastotakeintoaccountbothimprecisionanduncorrectedbias.Accuracyestimatesrefertoconditionsofsamplerusewhicharenormallyexpectedinaworkplacesetting.Theseconditionsmaybecharacterizedbythetemperature,atmosphericpressure,humidity,andambientwindspeed,noneofwhichmaybeconstantoraccuratelyknownwhenthesamplerisusedinthefield.Futhermore,theaccuracyaccountsfortheeffectsofdiffusivelossofanalyteontheestimationoftime-weightedaveragesofconcentrationswhichmaynotbeconstantintime.Asidefromaccuracy,thesamplersaretestedforcompliancewiththemanufacturer''sstatedlimitsoncapacity,possiblyinthepresenceofinterferingcompounds.1.2Thispracticeisanextensionofpreviousresearchondiffusivesamplers(1-14)aswellasPracticesD4597,D4598,D4599,andMDHS27.Anessentialadvancehereistheestimationofsampleraccuracyunderactualconditionsofuse.Futhermore,thecostsofsamplerevaluationarereduced.1.3Knowledgegainedfromsimilaranalytesexpeditessamplerevaluation.Forexample,interpolationofdatacharacterizingthesamplingofanalytesatseparatedpointsofahomologousseriesofcompoundsisrecommended.Atpresenttheprocedureof(9)issuggested.Followingevaluationofasamplerinuseatasinglehomologousseriesmemberaccordingtothepresentpractice,highermolecularweightmemberswouldreceivepartialvalidationsconsideringsamplingrate,capacity,analyticalrecovery,andinterferences.Thetestfordiffusiveanalytelosscanbeomittediftheeffectisfoundnegligibleforagivensampleroranalyteseries.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurportt......
【中国标准分类号】:C70
【国际标准分类号】:13_040_30
【页数】:8P.;A4
【正文语种】:英语
【英文标准名称】:SpecificationforPlasticInsertFittingsforPolybutylene(PB)Tubing
【原文标准名称】:聚丁烯(PB)管用塑料插入配件规范
【标准号】:ANSI/ASTMF845-1996
【标准状态】:作废
【国别】:美国
【发布日期】:1996
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:管;配件;塑料
【英文主题词】:Construction;Fittings;Pipes;Plasticpipes;Plastics;Plasticsproducts;Polybutene
【摘要】:
【中国标准分类号】:G33
【国际标准分类号】:23_040_45
【页数】:
【正文语种】:英语
