HB 1-19603-1983 平锥头盲孔螺纹空心铆钉
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基本信息
标准名称: | 平锥头盲孔螺纹空心铆钉 |
中标分类: |
航空、航天 >>
航空器与航天器零部件 >>
紧固件 |
替代情况: | HB 1-603-1974 |
发布日期: | 1984-05-31 |
实施日期: | 1984-07-01 |
首发日期: | |
作废日期: | |
出版日期: | |
适用范围
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前言
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目录
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引用标准
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所属分类: 航空 航天 航空器与航天器零部件 紧固件
【英文标准名称】:StandardPracticeforCleaning,Descaling,andPassivationofStainlessSteelParts,Equipment,andSystems
【原文标准名称】:不锈钢零件、设备及系统的清洗和除垢的标准操作规程
【标准号】:ASTMA380-2006
【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】:A01.14
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:清洁处理;除垢;薄板材;钢产品;钢;带钢;金属线
【英文主题词】:austeniticstainlesssteels;cleaning;corrosion;corrosiveserviceapplications;descaling;ferriticstainlesssteels;martensiticstainlesssteels;pickling;stainlesssteels
【摘要】:1.1Thispracticecoversrecommendationsandprecautionsforcleaning,descaling,andpassivatingofnewstainlesssteelparts,assemblies,equipment,andinstalledsystems.Theserecommendationsarepresentedasproceduresforguidancewhenitisrecognizedthatforaparticularserviceitisdesiredtoremovesurfacecontaminantsthatmayimpairthenormalcorrosionresistance,orresultinthelatercontaminationoftheparticularstainlesssteelgrade,orcauseproductcontamination.Forcertainexceptionalapplications,additionalrequirementswhicharenotcoveredbythispracticemaybespecifieduponagreementbetweenthemanufacturerandthepurchaser.Althoughtheyapplyprimarilytomaterialsinthecompositionrangesoftheaustenitic,ferritic,andmartensiticstainlesssteels,thepracticesdescribedmayalsobeusefulforcleaningothermetalsifdueconsiderationisgiventocorrosionandpossiblemetallurgicaleffects.1.1.1Thetermpassivationiscommonlyappliedtoseveraldistinctlydifferentoperationsorprocessesrelatingtostainlesssteels.Inordertoavoidambiguityinthesettingofrequirements,itmaybenecessaryforthepurchasertodefinepreciselytheintendedmeaningofpassivation.Someofthevariousmeaningsassociatedwiththetermpassivationthatareincommonusageincludethefollowing:Passivationistheprocessbywhichastainlesssteelwillspontaneouslyformachemicallyinactivesurfacewhenexposedtoairorotheroxygen-containingenvironments.Itwasatonetimeconsideredthatanoxidizingtreatmentwasnecessarytoestablishthispassivefilm,butitisnowacceptedthatthisfilmwillformspontaneouslyinanoxygen-containingenvironmentprovidingthatthesurfacehasbeenthoroughlycleanedordescaled.Passivationisremovalofexogenousironorironcompoundsfromthesurfaceofastainlesssteelbymeansofachemicaldissolution,mosttypicallybyatreatmentwithanacidsolutionthatwillremovethesurfacecontaminationbutwillnotsignificantlyaffectthestainleessteelitself.ThisprocessisdescribedinageneralwayinanddefinedpreciselyinwithfurtherreferencetotherequirementsofandPartIIofthetableonacidcleaningofsteel.Unlessotherwisespecified,itisthisdefinitionofpassivationthatistakenasthemeaningofaspecifiedrequirementforpassivation.Passivationisthechemicaltreatmentofastainlesssteelwithamildoxidant,suchasanitricacidsolution,forthepurposeofenhancingthespontaneousformationoftheprotectivepassivefilm.Suchchemicaltreatmentisgenerallynotnecessaryfortheformationofthepassivefilm.PassivationdoesnotindicatetheseparateprocessofdescalingasdescribedinSection,althoughdescalingmaybenecessarybeforepassivationcanbeeffective.1.2Thispracticedoesnotcoverdecontaminationorcleaningofequipmentorsystemsthathavebeeninservice,nordoesitcoverdescalingandcleaningofmaterialsatthemill.Ontheotherhand,someofthepracticesmaybeapplicableforthesepurposes.Whilethepracticeprovidesrecommendationsandinformationconcerningtheuseofacidsandothercleaninganddescalingagents,itcannotencompassdetailedcleaningproceduresforspecifictypesofequipmentorinstallations.Itthereforeinnowayprecludesthenecessityforcarefulplanningandjudgmentintheselectionandimplementationofsuchprocedures.1.3Thesepracticesmaybeappliedwhenfreeiron,oxidescale,rust,grease,oil,carbonaceousorotherresidualchemicalfilms,soil,particles,metalchips,dirt,orothernonvolatiledepositsmightadverselyaffectthemetallurgicalorsanitaryconditionorstabilityofasurface,themechanicaloperationofapart,component,orsystem,orcontaminateaprocessfluid.Thedegreeofcleannessrequiredonasurfacedependsontheapplication.Insomecases,nomoretha......
【中国标准分类号】:H40
【国际标准分类号】:77_140_20
【页数】:13P.;A4
【正文语种】:
【英文标准名称】:Disodiumchromotropatedihydrate
【原文标准名称】:二水合铬变二钠
【标准号】:JISK8316-1992
【标准状态】:作废
【国别】:日本
【发布日期】:1992-08-01
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonChemicalAnalysis
【标准类型】:()
【标准水平】:()
【中文主题词】:化学试剂;萘;铬变酸;水合物
【英文主题词】:chromotropicacid;naphthalene;;
【摘要】:この規格は,試薬として用いるクロモトロープ酸ニナトリウム二水和物について規定する。
【中国标准分类号】:G12
【国际标准分类号】:71_040_30
【页数】:4P;A4
【正文语种】:日语