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BS ISO 9286-1997 磨料颗粒和粗料.碳化硅的化学分析

作者:标准资料网 时间:2024-05-04 19:53:59  浏览:8984   来源:标准资料网
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【英文标准名称】:Abrasivegrainsandcrude-Chemicalanalysisofsiliconcarbide
【原文标准名称】:磨料颗粒和粗料.碳化硅的化学分析
【标准号】:BSISO9286-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1997-06-15
【实施或试行日期】:1997-06-15
【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】:
【英文主题词】:Abrasives;Aluminiumoxide;Chemicalanalysisandtesting;Determinationofcontent;Finishes;Impurities;Rawmaterials;Samplingmethods;Siliconcarbide;Surfaces;Testing;Tools
【摘要】:ThisInternationalStandardcoversthechemicalanalysisofsiliconcarbidebasedabrasivegrainsandcrudes.ItisapplicableforthedeterminationofthesurfaceimpuritiesofabrasivesgrainsanddeterminingtheSiCcontentofcrushedcrudewhenthesiliconcarbidecontentisgreaterthan95%(m/m).Whenthegrainsizeofthesiliconcarbideisgreaterthanorequalto15μm,thedeterminationofthelossonacidtreatmentiscarriedoutaccordingtothemethodgivenin3.5andtheresidualSiCcontent(SiCR)accordingtothemethodgivenin3.7.Whenthegrainsizeofthesiliconcarbideissmallerthan15μm,thedeterminationoftheSiCcontentshallbecarriedoutbythemethodsdescribedin4.3and4.4.2.1or4.4.2.3and4.5becausethemethodsgivenin4.2and3.7inevitablygivefalseresultsduetooxidation.Whenthesurfacecarboncontent[w(Csurf)]isgreaterthan2%(m/m),acoulometricdeterminationaccordingtothemethoddescribedin3.4.2.3willgivecorrectresults.Thegravimetricmethoddescribedin3.4.2.1isonlyapplicabletosurfacecarboncontentswhicharegreaterthan2%(m/m),ifignitioniscontinuedtoaconstantweightoraweightincrease.Thecoulometricmethoddescribedin3.4.2.2cannotbeappliedincaseswherew(Csurf)ismorethan2%.
【中国标准分类号】:J43
【国际标准分类号】:25_100_70
【页数】:30P;A4
【正文语种】:英语


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【英文标准名称】:Terminalblocks
【原文标准名称】:终端接线盒
【标准号】:UL1059-1993
【标准状态】:作废
【国别】:美国
【发布日期】:1993-02
【实施或试行日期】:
【发布单位】:美国保险商实验所(UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:终端设备;接线盒(电);接线端;电缆连接条;绝缘;接线板;电缆绝缘
【英文主题词】:cableconnectionstrips;electricterminals;insulations;terminalblocks;terminatingdevice;boxes(electric);cableinsulation
【摘要】:
【中国标准分类号】:K31
【国际标准分类号】:29_120_20
【页数】:26P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforMeasurementofCutResistancetoChainSawofFootProtectiveDevices
【原文标准名称】:量护脚设备耐链锯切割的标准试验方法
【标准号】:ASTMF1458-2004(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:F23.20
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:chainsaw;cutresistance;footprotectivedevices;footwear;gaiters;liners;Chainsaw;Cutresistance;Footprotectivedevices;Gaiters;Liners;Performance--protectiveclothing/materialsapplications
【摘要】:Thepurposeofthistestmethodistoprovideameasurablecriterionofperformancedefiningthelevelofcutresistancetothecuttingactionofasawchainprovidedbyfootprotectivedevices.Theprotection,whichcanbedemonstratedbythefootprotectivedevices,testedinaccordancewiththistestmethod,isachievedby(1)thematerialresistingcuttingwhenputincontactwiththemovingsawchain;(2)apartofthematerialbeingdrawnintothesawchainanddrivemechanismtoblockthesawchainmovement;(3)thematerialsresistingcuttingandabsorbingrotationalenergysothatsawchainspeedcanbesloweddownsufficientlytostopthemovementofthesawchain;or(4)anycombinationofthese.Incaseofadisputearisingfromdifferencesinreportedtestresults,whenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldperformcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensfromthesamelotofcomponentstobeevaluated.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.Ifabiasisfound,eitheritscausemustbedeterminedandcorrected,orthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinlightoftheknownbias.1.1Thistestmethodmeasurescutresistanceoffootprotectivedevicesthataredesignedtoprotectthefootwhenoperatingachainsaw.1.2Thistestmethodmaybeusedtotestforcompliancetominimumperformancerequirementsinestablishedsafetystandards.1.2.1Byagreementbetweenthepurchaserandthesupplier,orasrequiredbyestablishedsafetystandards,thistestmethodcanbeusedtodetermineanyoneorbothofthefollowing:(1)chainspeed50(CS50),(2)success/failure(jamming/chainstop)atspecifiedchainspeed.1.3Thistestmethodmaybeusedtodeterminelevelsofprotectionforareasofcoverageasstipulatedinestablishedsafetystandards.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Note18212;Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother,withoutcombiningvaluesinanyway.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:C73
【国际标准分类号】:13_340_10
【页数】:8P.;A4
【正文语种】:英语



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