ISO 4298-1984 锰矿石和锰精矿锰含量的测定电位滴定法
时间:2024-05-16 07:36:13 来源: 标准资料网 作者：标准资料网 阅读：8804
【英文标准名称】:Manganeseoresandconcentrates;Determinationofmanganesecontent;Potentiometricmethod
【原文标准名称】:锰矿石和锰精矿锰含量的测定电位滴定法
【标准号】:ISO4298-1984
【标准状态】:现行
【国别】:国际
【发布日期】:1984-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC65
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析;锰;锰矿石;化学分析和试验;含量测定;浓缩物;电位测量法
【英文主题词】:Chemicalanalysisandtesting;Concentrates;Determinationofcontent;Manganese;Manganeseores;Potentiometricmethods
【摘要】:Themethodisapplicabletothedeterminationofamanganesecontentequaltoorgreaterthan15%(m/m).ISO4298shouldbereadinconjunctionwithISO4297.Specifiesprinciple,reactions,reagents,apparatus,sampling,procedureandexpressionofresults.
【中国标准分类号】:D32
【国际标准分类号】:73_060_20
【页数】:3P;A4
【正文语种】:英语
Product Code:SAE MAM2279
Title:Tolerances, Metric, Rubber Products
Issuing Committee:Ams Ce Elastomers Committee
Scope:This specification covers established metric (SI) manufacturing tolerances applicable to non-cellular rubber products ordered to metric dimensions. These tolerances apply to all conditions, unless otherwise noted. The term "exclusive" applies only to the higher figure of the specified range.【英文标准名称】:TestMethodforPerformanceTestingofExcessFlowValves
【原文标准名称】:溢流阀性能试验的试验方法
【标准号】:ANSI/ASTMF1802-2004
【标准状态】:现行
【国别】:美国
【发布日期】:2004-05-27
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:溢流阀;试验方法;阀门
【英文主题词】:Overflowvalves;Testmethods;Valves
【摘要】:Thistestmethodcoversastandardizedmethodtodeterminetheperformanceofexcessflowvalves(EFVs)designedtolimitfloworstopflowinthermoplasticnaturalgasservicelines.Alltestsareintendedtobeperformedusingairasthetestfluid.Unlessotherwisestated,allflowratesarereportedinstandardcubicfeetperhourof0.6relativedensitynaturalgas.ThetestmethodrecognizestwotypesofEFV.Onetype,anexcessflowvalve-bypass(EFVB),allowsasmallamountofgastobleedthrough(bypass)afterithastripped,usuallyasameansofautomaticallyresettingthedevice.Thesecondtype,anexcessflowvalve-nonbypass(EFVNB),isintendedtotripshutforminganessentiallygastightseal.Theperformancecharacteristicscoveredinthistestmethodincludeflowattrippoint,pressuredropacrosstheEFV,bypassflowrateoftheEFVBorleakratethroughtheEFVNBaftertrip,andverificationthattheEFVcanbereset.Gasdistributionsystemsmaycontaincondensatesandparticulatessuchasorganicmatter,sand,dirt,andironcompounds.FieldexperiencehasshownthattheoperatingcharacteristicsofsomeEFVsmaybeaffectedbyaccumulationsofthesematerials.ThetestsofSectionweredevelopedtoprovideasimple,inexpensive,reproducibletestthatquantifiestheeffect,ifany,ofauniformcoatingofkeroseneandofkerosenecontaminatedwithaspecifiedamountofferricoxidepowderonanEFV'soperatingcharacteristics.Excessflowvalvescoveredbythistestmethodwillnormallyhavethefollowingcharacteristics:apressureratingofupto125psig(0.86MPa);atripflowofbetween200and2500ft/h(5.66and70.8m/h)at10psig(0.07MPa);aminimumtemperatureratingof0F(-18C),andamaximumtemperatureratingof100F(38C).TheEFVscoveredbythistestmethodshallbeconstructedtofitpipingsystemsnosmallerthan1/2CTSandnolargerthan11/4IPS,includingbothpipeandtubingsizes.Testswillbeperformedat6710F(19.45.5C).Alternativeoptionaltesttemperaturesare10010F(37.75.5C)and010F(-185.5C).Allflowratesmustbecorrectedtostandardconditions.ThistestmethodwaswrittenforEFVsinstalledinthermoplasticpipingsystems.However,itisexpectedthatthetestmethodmayalsobeusedforsimilardevicesinotherpipingsystems.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautions,seeSection.
【中国标准分类号】:J16
【国际标准分类号】:23_060_10
【页数】:
【正文语种】:英语