GB/T 2951.5-1997 电缆绝缘和护套材料通用试验方法 第2部分:弹性体混合料专用试验方法 第1节:耐臭氧试验--热延伸试验--浸矿物油试验
时间:2024-05-21 03:04:07 来源: 标准资料网 作者:标准资料网 阅读:9937
基本信息
标准名称: | 电缆绝缘和护套材料通用试验方法 第2部分:弹性体混合料专用试验方法 第1节:耐臭氧试验--热延伸试验--浸矿物油试验 |
英文名称: | Common test methods for insulating and sheathing materials of electric cables--Part 2: Methods specific to elastomeric compounds section one--Ozone resistance test--Hot set test--Mineral oil immersion test |
中标分类: |
电工 >>
电工材料和通用零件 >>
电缆及其附件 |
ICS分类: |
电气工程 >>
电线和电缆
|
替代情况: | 替代GB/T 2951.1-1994;GB/T 2951.15-1994;GB/T 2951.18-1994;GB/T 2951.35-1994;被GB/T 2951.21-2008代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1997-10-28 |
实施日期: | 1998-10-01 |
首发日期: | 1982-03-22 |
作废日期: | 2009-04-01 |
主管部门: | 中国电器工业协会 |
归口单位: | 全国电线电缆标准化技术委员会 |
起草单位: | 机械工业部上海电缆研究所 |
出版社: | 中国标准出版社 |
出版日期: | 1998-10-01 |
页数: | 16开, 页数:12, 字数:19千字 |
适用范围
GB/T 2951标准规定了配电用电缆和通信电缆,包括船用电缆的聚合物绝缘和护套材料的试验方法。GB/T 2951.5规定了耐臭氧试验方法、热延伸试验方法和侵矿物油试验方法。适用于电线、电缆的弹性体混合料。
前言
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目录
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引用标准
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所属分类: 电工 电工材料和通用零件 电缆及其附件 电气工程 电线和电缆
【英文标准名称】:TestMethodforDeterminationofIndividualComponentsinSparkIgnitionEngineFuelsbyHighResolutionGasChromatography
【原文标准名称】:高分辨气相色谱法测定火花点火发动机燃料中单一成分的试验方法
【标准号】:ASTMD6623-2001
【标准状态】:作废
【国别】:
【发布日期】:2001
【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】:D02.04.0L
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:detailedhydrocarbonanalysis;DHA;DHC;gaschromatography;hydrocarbons;IHA;opentubularcolumn;oxygenates;PIANO;PONA;gaschromatograph;gasoline;individualhydrocarbonanalysis;oxygenatedfuels;spark-ignitionenginefuels;detailedhydrocarbon
【摘要】:1.1ProceduresAandB:1.1.1TestProceduresAandBprovideforthedeterminationofindividualhydrocarboncomponentsofspark-ignitionenginefuelsandtheirmixturescontainingoxygenateblends(MTBE,ETBE,ethanol,andsoforth.)withboilingrangesupto225oC.Otherlightliquidhydrocarbonmixturestypicallyencounteredinpetroleumrefiningoperations,suchas,blendingstocks(naphthas,reformates,alkylates,andsoforth.)mayalsobeanalyzed;however,statisticaldatawasobtainedonlywithblendedspark-ignitionenginefuels.1.1.2Basedonthecooperativestudyresults,individualcomponentconcentrationsandprecisionaredeterminedintherangeof0.01toapproximately30%masspercent.Theproceduresmaybeapplicabletohigherandlowerconcentrationsfortheindividualcomponents;however,theusershallverifytheaccuracyiftheproceduresareusedforcomponentswithconcentrationsoutsidethespecifiedranges.1.1.3TestProceduresAandBalsodeterminemethanol,ethanol,t-butanolmethylt-butylether(MTBE),ethylt-butylether(ETBE),t-amyl-methyl-ether(TAME)insparkignitionenginefuelsintheconcentrationrangeof1to30mass%.However,thecooperativestudydataprovidedsufficientstatisticaldataforMTBEinProcedureBonly.1.1.4Althoughamajorityoftheindividualhydrocarbonspresentaredetermined,someco-elutionofcompoundsisencountered.Ifthistestmethodisutilizedtoestimatebulkhydrocarbongroup-typecomposition(PONA)theuserofsuchdatashouldbecautionedthatsomeerrorwillbeencounteredduetoco-elutionandalackofidentificationofallcomponentspresent.Samplescontainingsignificantamountsofolefinicornaphthenic,orboth(forexample,virginnaphthas)constituentsaboveN-octanemayreflectsignificanterrorsinPONAtypegroupings.Basedonthegasolinesamplesintheinterlaboratorycooperativestudy,theseproceduresareapplicabletoconcentrationsofolefinstolessthan25mass%.However,someinterferingcoelutionwiththeolefinsaboveC7ispossible,particularlyifblendingcomponentsortheirhigherboilingcutssuchasthosederivedfromfluidcatalyticcracking(FCC)areanalyzed,andthetotalolefincontentmaynotbeaccurate.AppendixX1ofthistestmethodcomparesresultsofthetestprocedureswithothertestmethodsforselectedcomponents,includingolefins,andseveralgrouptypesforseveralinterlaboratorycooperativestudysamples.Althoughbenzene,tolueneandseveraloxygenatesaredetermined,whendoubtfulastotheanalyticalresultsofthesecomponents,confirmatoryanalysiscanbeobtainedbyusingthespecifictestmethodslistedinthereferencesection.Totalolefinsinthesamplesmaybeobtainedorconfirmed,orboth,ifnecessary,byTestMethodD1319(volume%)orothertestmethods,suchasthosebasedonmultidimentionalPONAtypeofinstruments.1.1.5Ifwaterisorissuspectedofbeingpresent,itsconcentrationmaybedetermined,ifdesired,bytheuseofTestMethodD1744orequivalent.Othercompoundscontainingoxygen,sulfur,nitrogen,andsoforthmayalsobepresent,andmayco-elutewiththehydrocarbons.Ifdeterminationofthesespecificcompoundsisrequired,itisrecommendedthattestmethodsforthesespecificmaterialsbeused,suchasTestMethodsD4815andD5599foroxygenates,andTestMethodD5623forsulfurcompoundsorequivalent.1.2ProcedureC1.2.1TestProcedureCprovidesforthedeterminationofindividualhydrocarboncomponentsofspark-ignitionenginefuelswithboilingrangesupto225oC.Otherlightliquidhydrocarbonmixturestypicallyencounteredinpetroleumrefiningoperations,suchas,blendingstocks(naphthas,reformates,alkylates,andsoforth)mayalsobeanalyzed;however,statisticaldatawasobtainedonlywithblendedspark-ignitionenginefuels.Thetablesrel......
【中国标准分类号】:E31
【国际标准分类号】:71_040_50
【页数】:109P.;A4
【正文语种】:
【英文标准名称】:Animalandvegetablefatsandoils-Determinationofcopper,ironandnickelcontents-Graphitefurnaceatomicabsorptionmethod
【原文标准名称】:动植物脂肪和油.铜、铁和镍含量的测定.石墨熔炉原子吸收测定法
【标准号】:BSENISO8294-2000
【标准状态】:现行
【国别】:英国
【发布日期】:1995-03-15
【实施或试行日期】:1995-02-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:镍;铁;植物油;原子吸收分光光度测定法;含量测定;铜;脂肪;油;食品检验;动物油;植物脂肪;动物脂肪;再现性;试样
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationoftraceamountsofcopper,ironandnickelinanimalandvegetablefatsandoils,referredtohereinafterasfats.
【中国标准分类号】:X14
【国际标准分类号】:67_200_10
【页数】:12P.;A4
【正文语种】:英语