【英文标准名称】:StandardPracticeforCalculationandAdjustmentoftheLangelierSaturationIndexforReverseOsmosis
【原文标准名称】:反渗透用估算和校正Langclier饱和指数的标准实施规范
【标准号】:ASTMD3739-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D19.08
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:索引;数学计算;反渗透;饱和指数;水
【英文主题词】:CaCO3scale;LangelierSaturationndex;LSI;reverseosmosis;scaling
【摘要】:Inthedesignandoperationofreverseosmosisinstallations,itisimportanttopredictthecalciumcarbonatescalingpropertiesoftheconcentratestream.Becauseoftheincreaseintotaldissolvedsolidsintheconcentratestreamandthedifferenceinpassagesforcalciumion,bicarbonateion,andfreeCO2,thecalciumcarbonatescalingpropertiesoftheconcentratestreamwillgenerallybequitedifferentfromthoseofthefeedsolution.ThispracticepermitsthecalculationoftheLangelierSaturationIndexfortheconcentratestreamfromthefeedwateranalysesandthereverseosmosisoperatingparameters.ApositiveLangelierSaturationIndexindicatesthetendencytoformacalciumcarbonatescale,whichcanbedamagingtoreverseosmosisperformance.ThispracticegivesvariousproceduresfortheadjustmentoftheLangeliersaturationindex.ThetendencytoformCaCo3scalecanbesuppressedbytheadditionofantiscalentsorcrystalmodifiers.Suppliersofantisealentsandcrystalmodifierscanprovideinformationonthescaleinhibitionpeformanceofthesetypesofchemical.TheirusemaybeappropriateforreducingscaleformationinROsystems.TheROsystemsuppliershouldbeconsultedpriortotheuseofantisealentsandcrystalmodifierstoensuretheywillnothaveanegativeimpactontheROsystem.1.1ThispracticecoversthecalculationandadjustmentoftheLangeliersaturationindexfortheconcentratestreamofareverseosmosisdevice.Thisindexisusedtodeterminetheneedforcalciumcarbonatescalecontrolintheoperationanddesignofreverseosmosisinstallations.Thispracticeisapplicableforconcentratestreamscontainingxx10to10000mg/Loftotaldissolvedsolids.Forconcentratecontainingover10000mg/LseePracticeD4582.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A40
【国际标准分类号】:07_030
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:TestMethodforDeterminingStrengthofAdhesivelyBondedRigidPlasticLap-ShearJointsinShearbyTensionLoading
【原文标准名称】:用抗张负荷法测定胶粘剂粘接刚性塑料接头剪切强度的试验方法
【标准号】:ASTMD3163-1996
【标准状态】:作废
【国别】:美国
【发布日期】:1996
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:连接件(活接头);塑料;粘结强度;胶粘剂;抗张负荷;试验
【英文主题词】:adhesives;tensileloading;plastics;joints(articulations);bondstrength;testing
【摘要】:
【中国标准分类号】:G38
【国际标准分类号】:83_180
【页数】:
【正文语种】:英语