SAE AS25183 Connector, Plug, Electric, Potting Seal, Solder Contact, An Type
作者:标准资料网 时间:2024-04-26 12:01:36 浏览:9720
来源:标准资料网
Product Code:SAE AS25183
Title:Connector, Plug, Electric, Potting Seal, Solder Contact, An Type
Issuing Committee:Ae-8c1 Connectors Committee
Scope:No scope available.
【英文标准名称】:StandardPracticeforAssessingtheTendencyofIndustrialBoilerWaterstoCauseEmbrittlement(USBMEmbrittlementDetectorMethod)
【原文标准名称】:评价工业锅炉用水引起脆裂倾向的标准实施规程(美国矿业局的脆变检查器方法)
【标准号】:ASTMD807-2005(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【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】:D19.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:boilerwater;cracking;detector;embrittlement;intercrystalline;Boilerfeedwater;Corrosivity--water;Embrittlement;Pressurevesselsteelforgings;USBMtest;Watercorrosivity
【摘要】:Embrittlementisaformofintercrystallinecrackingthatisassociatedwiththeexposureofboilersteeltoacombinationofphysicalandchemicalfactors.Forembrittlementofboilermetaltooccur,themetalmustbeunderstress,itmustbeatthesiteofaleak,anditmustbeexposedtotheconcentratedboilerwater.Inaddition,theboilerwatermustbeembrittlinginnature.Theprecisechemicalcausesoftheembrittlingnatureofsomewatersisnotwellunderstood.Experiencehasshownthatcertainwatersexhibitanembrittlingcharacteristicwhileothersdonot.Becauseembrittlementisaformofcracking,itisnearlyimpossibletodetectinanoperatingboileruntilafailurehasoccured.Ingeneral,crackingfailurestendtobesudden,andoftenwithseriousconsequences.Thispracticeoffersawaytodeterminewhetheraparticularwaterisembrittlingornot.Italsomakesitpossibletodetermineifspecifictreatmentactionshaverenderedthewaternonembrittling.1.1Thispractice,knownastheembrittlement-detectormethod,coverstheapparatusandprocedurefordeterminingtheembrittlingornonembrittlingcharacteristicsofthewaterinanoperatingboiler.TheinterpretationoftheresultsshallberestrictedtothelimitssetforthinSection8.6.Note18212;Theembrittlementdetectorwasdesignedtoreproducecloselytheconditionsexistinginanactualboilerseam.Itisconsideredprobablethattheindividualconditionsofleakage,concentration,andstressintheboilerseamcanequalthoseinthedetector.Theessentialdifferencebetweenthedetectorandtheboileristhattheformerissoconstructedandoperatedthatthesethreemajorfactorsactsimultaneously,continuously,andunderthemostfavorablecircumstancestoproducecracking;whereas,intheboilerthethreefactorsarebroughttogetheronlyunderuniquecircumstances.Furthermore,inthedetectoranycrackingisproducedinasmalltestsurfacethatcanbeinspectedthoroughly,whilethesusceptibleareasinaboilerarelargeandcanbeinspectedonlywithdifficulty.Intheserespectstheembrittlementdetectorprovidesanacceleratedtestofthefourthconditionnecessaryforembrittlement,theembrittlingnatureoftheboilerwater.Note28212;Cracksinaspecimenafterbeingsubjectedtothistestindicatethattheboilerwatercancauseembrittlementcracking,butnotthattheboilerinquestionnecessarilyhascrackedorwillcrack.1.2Theeffectivenessoftreatmenttopreventcracking,aswellasanindicationofwhetheranunsafeconditionexists,areshownbythispractice.Suchtreatmentsareevaluatedintermsofmethodspecimenresistancetofailure.1.3Thepracticemaybeappliedtoembrittlementresistancetestingofsteelsotherthanboilerplate,providedthataduplicate,unexposedspecimendoesnotcrackwhenbent90x00B0;ona2-in.(51-mm)radius.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J98
【国际标准分类号】:27_060_30
【页数】:6P.;A4
【正文语种】:英语
【英文标准名称】:Rubberseals;staticsealsindomesticappliancesforcombustiblegasupto200mbar;specificationsformaterial;germanversionEN291:1992
【原文标准名称】:橡胶密封.用200毫巴以下气体燃料的家用器具的静态密封
【标准号】:DINEN291-1992
【标准状态】:作废
【国别】:德国
【发布日期】:1992-04
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:燃气技术;稳定性(机械性能);密封件;板材;燃气动力装置;耐力;抗扯裂强度;分类;试验;质量要求;断裂伸长;耐气试验;硫化橡胶;家用设备;材料;耐气腐蚀;老化稳定性;试样;家用的;规范(审批);定义;检验
【英文主题词】:
【摘要】:
【中国标准分类号】:G34
【国际标准分类号】:1000
【页数】:7P;A4
【正文语种】:德语
