Product Code:SAE AS8879
Title:Screw Threads - Unj Profile, Inch Controlled Radius Root With Increased Minor Diameter
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:This SAE Aerospace Standard (AS) specifies the characteristics of screw threads - UNJ profile inch series, including a mandatory controlled radius as specified in Table 1 at the root of the external thread. The minor diameter of both external and internal threads provides a basic thread height of .5625H to accommodate the external thread maximum root radius. The following detailed design requirements are included: a. Screw threads - UNJ basic profile and design profiles. b. Standard series of diameter-pitch combinations for nominal thread diameters from 0.060 to 6.000 inches. c. Standard thread classes and form tolerances. d. Formulae for thread dimensions and tolerances. e. Method of designating UNJ threads. f. Tables for selected diameter-pitch combinations for close tolerance mechanical thread applications. g. Tables for screw thread - UNJ profile thread limit dimensions.
基本信息
| 标准名称： | 水利建设项目经济评价规范 SL 72-94 |
| 英文名称： | regulation for economic evaluation of water conservancy construction projects |
| 中标分类： |
工程建设 >>
水利、水电工程 >>
水利、水电工程综合 |
| 替代情况： | SD 139-1985 |
| 发布部门： | 中华人民共和国水利部 |
| 发布日期： | 1994-03-09 |
| 实施日期： | 1994-05-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 主管部门： | 中华人民共和国水利部 |
| 起草单位： | 水利水电规划设计总院 |
| 出版日期： | 1900-01-01 |
| 页数： | 52页 |
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： 工程建设 水利 水电工程 水利 水电工程综合
【英文标准名称】:StandardPracticeforSamplingandSelectionofAnalyticalTechniquesforPesticidesandPolychlorinatedBiphenylsinAir
【原文标准名称】:空气中农药和多氯联苯抽样和选择分析技术的标准实施规程
【标准号】:ASTMD4861-2005
【标准状态】:现行
【国别】:
【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】:D22.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:农药;抽样方法;试验;多氯联苯;空中监视器;空气质量
【英文主题词】:air;Aroclors;carbamates;chlorophenols;chlorophenoxyacids;organochlorines;organophosphates;PCBs;pesticides;polychlorinatedbiphenyls;polyurethanefoam;pyrethrins;samplingandanalysis;semivolatileorganics;triazines;ureas
【摘要】:Thispracticeisrecommendedforuseprimarilyfornon-occupationalexposuremonitoringindomiciles,publicaccessbuildings,andoffices.ThemethodsdescribedinthispracticehavebeensuccessfullyappliedtomeasurementofpesticidesandPCBsinoutdoorairandforpersonalrespiratoryexposuremonitoring.Abroadspectrumofpesticidesarecommonlyusedinandaroundthehouseandforinsectcontrolinpublicandcommercialbuildings.Othersemivolatileorganicchemicals,suchasPCBs,arealsooftenpresentinindoorair,particularlyinlargeofficebuildings.Thispracticepromotesneededprecisionandbiasinthedeterminationofmanyoftheseairbornechemicals.1.1Thispracticecoversthesamplingofairforavarietyofcommonpesticidesandpolychlorinatedbiphenyls(PCBs)andprovidesguidanceontheselectionofappropriateanalyticalmeasurementmethods.Othercompoundssuchaspolychlorinateddibenzodioxins/furans,polybrominatedbiphenyls,polybrominateddiphenylethers,polycyclicaromatichydrocarbons,andpolychlorinatednaphthalenesmaybeefficientlycollectedfromairbythispractice,butguidanceontheiranalyticaldeterminationisnotcoveredbythispractice.1.2Acompletelistingofpesticidesandothersemivolatileorganicchemicalsforwhichthispracticehasbeentestedisshownin.1.3Thispracticeisbasedonthecollectionofchemicalsfromairontopolyurethanefoam(PUF)oracombinationofPUFandgranularsorbent.1.4Thispracticeisapplicabletomulticomponentatmospheres,0.001to50-g/m3concentrations,and4to24-hsamplingperiods.Thelimitofdetectionwilldependonthenatureoftheanalyteandthelengthofthesamplingperiod.1.5Theanalyticalmethod(s)recommendedwilldependonthespecificchemical(s)sought,theconcentrationlevel,andthedegreeofspecificityrequired.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardsstatements,seeand.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_30
【页数】:16P.;A4
【正文语种】: