您的位置: 标准下载 » 协会标准 » SAE 美国机动车工程师学会 »

SAE AS3243 Bolt, Machine - Double Hexagon Extended Washer Head, Drilled, PD Shank, Cres, UNS N07718, 185 ksi min, .1900-

作者:标准资料网 时间:2024-05-21 18:37:30  浏览:9030   来源:标准资料网
下载地址: 点击此处下载
Product Code:SAE AS3243
Title:Bolt, Machine - Double Hexagon Extended Washer Head, Drilled, PD Shank, Cres, UNS N07718, 185 ksi min, .1900-32 UNJF-3A
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope: No scope available
Rationale: No scope available
下载地址: 点击此处下载
【英文标准名称】:StandardTestMethodforDeterminingFilterabilityofMiddleDistillateFuelOils
【原文标准名称】:测定中间馏出燃料油可过滤性的标准试验方法
【标准号】:ASTMD6426-2004
【标准状态】:作废
【国别】:美国
【发布日期】:2004
【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】:燃料油;可过滤性;试验;航空燃料油
【英文主题词】:Aviationturbinefuels;Filterability;Filtrations;Fueloil;Testing
【摘要】:
【中国标准分类号】:E31
【国际标准分类号】:27_060_10
【页数】:6P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforMeasuringtheUltrasonicVelocityinPolyethyleneTankWallsUsingLateralLongitudinal(LCR)Waves
【原文标准名称】:利用侧向纵波(L)测定聚乙烯容器壁中超声波速度的标准实施规程
【标准号】:ASTME2479-2006
【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】:E07.06
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:侧面的;测量;聚乙烯;容器壁;超声波学;速度;墙
【英文主题词】:
【摘要】:1.1Thispracticecoversaprocedureformeasuringtheultrasonicvelocitiesintheouterwallofpolyethylenestoragetanks.Ananglebeamlaterallongitudinal(LCR)waveisexcitedwithwedgesalongacircumferentialchordofthetankwall.Adigitalultrasonicflawdetectorisusedwithsending-receivingsearchunitsinthroughtransmissionmode.Theobservedvelocityistemperaturecorrectedandcomparedtotheexpectedvelocityforanew,unexposedsampleofmaterialwhichisthesameasthematerialbeingevaluated.ThedifferencebetweentheobservedandtemperaturecorrectedvelocitiesdeterminesthedegreeofUVexposureofthetank.1.2Thepracticeisintendedforapplicationtotheoutersurfacesofthewallofpolyethylenetanks.Degradationtypicallyoccursinanouterlayerapproximately3.2-mm[0.125-in.]thick.Sincethetechniquedoesnotinterrogatetheinsidewallofthetank,wallthicknessisnotaconsiderationotherthantobeawareofpossibleguided(Lamb)waveeffectsorreflectionsoffoftheinnertankwall.Nospecialsurfacepreparationisnecessarybeyondwipingtheareawithacleanrag.Insidewallpropertiesarenotimportantsincethelongitudinalwavedoesnotstrikethissurface.TheexcitationofLambwavesmustbeavoidedbychoosinganexcitationfrequencysuchthattheratioofwavelengthtowallthicknessisonefifthorless.1.3UVdegradationontheoutersurfacecausesastiffeningofthematerialandanincreaseinYoung''smodulusandthelongitudinalwavevelocity.
【中国标准分类号】:A82
【国际标准分类号】:23_020_10;83_080_01
【页数】:7P.;A4
【正文语种】: