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NF A81-950-1991 电弧焊.沉积软合金钢的湿式手工焊接用涂药焊条.规范.

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【英文标准名称】:Arcwelding.Coveredelectrodesforwetmanualweldingdepositingamildalloysteel.Specification.
【原文标准名称】:电弧焊.沉积软合金钢的湿式手工焊接用涂药焊条.规范.
【标准号】:NFA81-950-1991
【标准状态】:现行
【国别】:法国
【发布日期】:1991-07-01
【实施或试行日期】:
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Arcwelding.Coveredelectrodesforwetmanualweldingdepositingamildalloysteel.Specification.
【中国标准分类号】:J33
【国际标准分类号】:
【页数】:15P.;A4
【正文语种】:法语


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【英文标准名称】:Plastics-Polyamides-Determinationofviscositynumber
【原文标准名称】:塑料.聚酰胺.粘度值的测定
【标准号】:BSENISO307-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-06-29
【实施或试行日期】:2007-06-29
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和试验;定义;测定;仪器;数学计算;模制材料(成型部件);塑料;聚酰胺;溶液;溶剂;试样制备;测试;热塑性聚合物;粘度;粘度测量;粘度值
【英文主题词】:Chemicalanalysisandtesting;Definitions;Determination;Instruments;Mathematicalcalculations;Mouldings(shapedsection);Plastics;Polyamides;Solutions;Solvents;Specimenpreparation;Testing;Thermoplasticpolymers;Viscosity;Viscositymeasurement;Viscositynumbers
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationoftheviscositynumberofdilutesolutionsofpolyamidesincertainspecifiedsolvents.Polyamidesamplesmustbecompletelysolubleinthesolventsmentioned.Additivessuchasflame-retardantsandmodifiersofteninterferewiththeviscositymeasurement,havinganincreasingeffectontheviscositynumberinformicacidandadecreasingeffectontheviscositynumberinsulfuricacid.Theextentoftheeffectforpolyamidecompoundsdependsontheadditive,thequantityoftheadditive,thepresenceofotheradditivesandthecompoundingconditions.Forpurepolyamidesorpolyamidescontainingadditivesthatdonotinterferewiththeviscositymeasurement,thedeterminationoftheviscositynumberofapolyamideprovidesameasureofthemolecularmassofthepolymer.Theviscositynumberofpurepolyamidesorpolyamideswhichcontainadditivesthatdonotinterferewiththeviscositymeasurementcanbeconvertedfromonesolventtoanother.Theviscositynumberofpolyamidescontainingadditivesthatdointerferewiththeviscositymeasurementisspecifictothesolventusedandthematerialcomposition.Inthiscase,themeasuredviscositynumbercannotbeconvertedfromonesolventtoanother.ThemethodisapplicabletothepolyamidesdesignatedPA46,PA6,PA66,PA69,PA610,PA612,PA11,PA12,PA6T/66,PA6I/6T,PA6T/6I/66,PA6T/6I,PA6I/6T/66andPAMXD6asdefinedinISO1874-1,aswellastocopolyamides,compoundsofpolyamidesandotherpolyamidesthataresolubleinoneofthespecifiedsolventsunderthespecifiedconditions.Themethodisnotapplicabletopolyamidesproducedbyanionicpolymerizationoflactamsorproducedwithcross-linkingagents;suchpolyamidesarenormallyinsolubleinthespecifiedsolvents.TheviscositynumberisdeterminedbythegeneralprocedurespecifiedinISO1628-1,observingtheparticularconditionsspecifiedinthisInternationalStandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:44P.;A4
【正文语种】:英语


【英文标准名称】:Special-PurposeGearUnitsforRefineryService
【原文标准名称】:炼油设备专用齿轮机构
【标准号】:ANSI/API613-2002
【标准状态】:现行
【国别】:美国
【发布日期】:2002-07-12
【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】:API(Organization)
【标准类型】:()
【标准水平】:()
【中文主题词】:补助产品;齿轮箱;天然气工业;石油工业
【英文主题词】:auxiliaryproducts;gearboxes;naturalgasindustries;oilindustries
【摘要】:Thisstandardcoverstheminimumrequirementsforspecial-purpose,enclosed,precisionsingle-anddouble-helicalone-andtwo-stagespeedincreasersandreducersofparallel-shaftdesignforpetroleum,chemicalandgasindustryservices.Thisstandardisprimarilyintendedforgearunitsthatareincontinuousservicewithoutinstalledspareequipment.Gearsetsfurnishedtothisstandardshallbeconsideredmatchedsets.
【中国标准分类号】:E97
【国际标准分类号】:75_180_10
【页数】:
【正文语种】:英语