【英文标准名称】:StandardTestMethodforTurnerandNewall(TandN)Wet-LengthClassificationofAsbestos
【原文标准名称】:石棉的T/N湿度-长度分类标准试验方法
【标准号】:ASTMC1121-2004e1
【标准状态】:现行
【国别】:
【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】:C17.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:筛选(大小);石棉;试验;分类
【英文主题词】:asbestos;classification;length;lengthclassification;TandN;TurnerandNewall;wetlength;wetlengthclassification
【摘要】:Thistestmethodprovidesasimpleprocedureforobtaininginformationonthefiberlengthdistributionofsuitableasbestosfiber.Theuseofrelativelylowcostapparatus,smalltestspecimens,andashorttestperiod,enhancetheusefulnessofthistestmethod.Normally,resultsobtainedbythistestmethodarereproducibleundercomparablelaboratoryconditions.However,closeagreementcannotbeexpectedunlessalldeviationsfromtheprocedure,howeverminor,areavoided.Moreover,resultsforlongerfibergradesareinfluencedtoagreaterextentbydifferencesinfiberlengthdistribution,andcharacteristics,thanarethoseforshortergrades.Thistestissuitableforspecificationacceptanceandmanufacturingcontrol.Itisassumedthatallundersizedfibers,andonlythose,willpassthroughanygivensieveaperture.However,thisidealizedconditionisnotnormallyachieved.Thus,resultsshouldnotbemisconstruedastruelengthdistributiondata.1.1ThistestmethodcoverstheoperationoftheTurnerandNewall(TandN)wetsievingclassifierforasbestos,andaprocedureforthedeterminationoffiberlengthdistributionandfines(definedinTerminologyD2946)contentofmilledasbestosfiber(74m(200mesh))sievedescribedinSpecificationE11.1.2Forpurposesofestimatinglengthdistribution,thetestislimitedtosamplesfreefromexcessivequantitiesofnon-fibrousparticlesorcontaminants.Quantitiesexceeding0.05gretainedinanygivenlengthfractionsareconsideredexcessive.1.3Forcomparisonsbetweendifferentfibergrades,onlythosespecimenswhichhaveapproximatelythesamedegreeoffiberizationasdeterminedbyTestMethodsD2752willgivecompletelymeaningfulresults.1.4Thistestmethodisnotapplicabletoultrafinegradesofasbestospowderswhichcontainlittleornofibersretainedona74-m(200mesh)sieve.ThismethodisrestrictedtoQuebecStandardgrades4Ato7DinclusiveasdeterminedbyTestMethodD3639.Note1ThisisanalternativeproceduretoTestMethodD2589.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Warning-Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimizethedustthatresults.Forinformationonthesafeuseofchrysoltileasbestos,referto"SafeUseofChrysotileAsbestos:AManualonPreventiveandControlMeasures."Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,see.
【中国标准分类号】:Q61
【国际标准分类号】:91_100_40
【页数】:4P.;A4
【正文语种】:
基本信息
标准名称: | 连铸结晶器中稀土丝喂入法 |
中标分类: |
冶金 >>
有色金属及其合金产品 >>
稀有金属及其合金 |
ICS分类: |
冶金 >>
有色金属产品
|
发布部门: | 中华人民共和国冶金工业部 |
发布日期: | 1993-04-14 |
实施日期: | 1993-11-01 |
首发日期: | |
作废日期: | |
提出单位: | 冶金工业部信息标准研究院 |
起草单位: | 包头稀土研究院 |
起草人: | 宝音、王淑清、赵慧玲 |
出版社: | 冶金工业出版社 |
出版日期: | 1993-11-01 |
页数: | 3页 |
适用范围
本标准规定了稀土丝喂人方法的喂丝机、稀土丝、稀土加入量及喂丝操作。
本标准适用于板坯连铸结晶器内稀土丝的喂入方法。
前言
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目录
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引用标准
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所属分类: 冶金 有色金属及其合金产品 稀有金属及其合金 冶金 有色金属产品