【英文标准名称】:StandardPracticeforEvaluatingTestSensitivityforRubberTestMethods
【原文标准名称】:评定橡胶试验方法的试验敏感性的标准实施规程
【标准号】:ASTMD6600-2000(2009)
【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】:D11.16
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:absolutetestsensitivity;calibrationmaterial;referencematerial;relativetestsensitivity;signal-to-noiseratio;testsensitivity;Rubberpropertyanalysis;Sensitivitycriterion/response;Testingmethods
【摘要】:Testingisconductedtomaketechnicaldecisionsonmaterials,processes,andproducts.Withthecontinuedgrowthintheavailabletestmethodsforevaluatingscientificandtechnicalproperties,aquantitativeapproachisneededtoselecttestmethodsthathavehigh(orhighest)qualityortechnicalmerit.Theproceduresasdefinedinthispracticemaybeusedforthispurposetomaketestingascosteffectiveaspossible.Oneindexoftestmethodtechnicalmeritandimpliedsensitivityfrequentlyusedinthepasthasbeentestmethodprecision.Theprecisionisusuallyexpressedassomemultipleofthetestmeasurementstandarddeviationforadefinedtestingdomain.Althoughprecisionisarequiredquantityfortestsensitivity,itisanincompletecharacteristic(onlyonehalfofthenecessaryinformation)sinceitdoesnotconsiderthediscriminationpowerfortheFP(orconstituent)beingevaluated.Anyattempttoevaluaterelativetestsensitivityfortwodifferenttestmethodsonthebasisoftestmeasurementstandarddeviationratiosorvarianceratios,whichlackanydiscriminationpowerinformationcontent,constitutesaninvalidquantitativebasisforsensitivity,ortechnicalmeritevaluation.Coefficientofvariationratios(whicharenormalizedtothemean)mayconstituteavalidtestsensitivityevaluationonlyunderthespecialconditionwherethetwotestmethodsundercomparisonaredirectlyproportionalorreciprocallyrelatedtoeachother.Iftherelationshipbetweentwotestmethodsisnonlinearorlinearwithanonzerointercept,thecoefficientofvariationratiosarenotequivalenttothetruetestsensitivityasdefinedinthispractice.SeediscussionofexampleinX1.1.4.Thefigureofmeritdefinedbytestsensitivityanditsvariousclassifications,categories,andtypesasintroducedbythispracticepermitsanauthenticquantitativetestsensitivityevaluation.1.1Thispracticecoverstestingtoevaluatechemicalconstituents,chemicalandphysicalpropertiesofcompoundingmaterials,andcompoundedandcuredrubbers,whichmayfrequentlybeconductedbyoneormoretestmethods.Whenmorethanonetestmethodisavailable,twoquestionsarise:Whichtestmethodhasthebetter(orbest)responsetoordiscriminationfortheunderlyingfundamentalpropertybeingevaluated?andWhichtestmethodhastheleasterror?Thesetwocharacteristicscollectivelydetermineonetypeoftechnicalmeritoftestmethodsthatmaybedesignatedastestsensitivity.1.2Althoughacomprehensiveanddetailedtreatment,asgivenbythispractice,isrequiredforafullappreciationoftestsensitivity,asimplifiedconceptualdefinitionmaybegivenhere.Testsensitivityistheratioofdiscriminationpowerforthefundamentalpropertyevaluatedtothemeasurementerrororuncertainty,expressedasastandarddeviation.Thegreaterthediscriminatingpowerandthelowerthetesterror,thebetteristhetestsensitivity.Borrowingfromtheterminologyinelectronics,thisratiohasfrequentlybeencalledthesignal-to-noiseratio;thesignalcorrespondingtothediscriminationpowerandthenoisecorrespondingtothetestmeasurementerror.Therefore,thispracticedescribeshowtestsensitivity,genericallydefinedasthesignal-to-noiseratio,maybeevaluatedfortestmethodsusedintherubbermanufacturingindustry,whichmeasuretypicalphysicalandchemicalproperties,withexceptionsasnotedin1.3.1.3Thispracticedoesnotaddressthetopicofsensitivityforthresholdlimitsorminimumdetectionlimits(MDL)insuchapplicationsas(1)theeffectofintentionalvariationsofcompoundingmaterialsonmeasuredcompoundpropertiesor(2)theevaluationoflowortraceconstituentlevels.Minimumdetectionlimitsarethesubjectofseparatestandards.
基本信息
标准名称: | 8级链条用锻造起重部件 |
英文名称: | Forged steel lifting components for use with grade 8 chain |
中标分类: |
机械 >>
通用机械与设备 >>
起重机械 |
ICS分类: |
材料储运设备 >>
起重设备 >>
起重设备附件
|
发布部门: | 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 |
发布日期: | 2011-01-10 |
实施日期: | 2011-06-01 |
首发日期: | 2011-01-10 |
作废日期: | |
主管部门: | 全国起重机械标准化技术委员会(SAC/TC 227) |
提出单位: | 中国机械工业联合会 |
归口单位: | 全国起重机械标准化技术委员会(SAC/TC 227) |
起草单位: | 杭州现代起重机械制造厂、杭州武林机器有限公司、北京起重运输机械设计研究院、浙江双鸟机械有限公司 |
起草人: | 黄振远、崔欣、崔振元、林夫奎 |
出版社: | 中国标准出版社 |
出版日期: | 2011-06-01 |
页数: | 12页 |
适用范围
本标准规定了在吊链中使用的钢制锻造起重部件的技术要求、其强度和主要尺寸与符合GB/T 24816规定的相应名义尺寸的8级链条相匹配。
本标准所规定的起重部件通常是作为吊链系统的一部分供货,但也可单独供货用于其他场合。当它们按GB/T 25853规定的8级非焊接吊链系统的一部分供货时,还应符合GB/T 25853的规定。
本标准不适用于作为GB/T 20652规定的焊接吊链组成部分的焊接主环、焊接中间环和焊接连接环,也不适用于其他焊接部件。
前言
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目录
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引用标准
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所属分类: 机械 通用机械与设备 起重机械 材料储运设备 起重设备 起重设备附件