热门站点| 世界资料网 | 专利资料网 | 世界资料网论坛
收藏本站| 设为首页| 首页

DIN EN 2794-003-1999 航空航天系列.额定电流为20A至50A的温度补偿的单极电路断路保护开关.第003部分:米制螺纹端子.产品标准

作者:标准资料网 时间:2024-05-22 03:27:50  浏览:8628   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:Aerospaceseries-Circuitbreakers,single-pole,temperaturecompensated,ratedcurrents20Ato50A-Part003:Metricthreadterminals;productstandard;GermanversionEN2794-003:1999
【原文标准名称】:航空航天系列.额定电流为20A至50A的温度补偿的单极电路断路保护开关.第003部分:米制螺纹端子.产品标准
【标准号】:DINEN2794-003-1999
【标准状态】:现行
【国别】:德国
【发布日期】:1999-08
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:飞行器部件;单极;飞行器系统;名称与符号;额定电流;米制螺纹;电气工程;航空运输;作标记;电气保护设备;航空航天运输;航天运输;产品标准;多语种的
【英文主题词】:Aerospacetransport;Airtransport;Aircraftcomponents;Circuit-breakers;Connections;Currents;Designations;Dimensions;Electricalengineering;Electricalpropertiesandphenomena;Electricalprotectionequipment;Electricalsystems;Environmentalcondition;Explosion-proof;Marking;Mass;Mechanicalproperties;Metricscrewthreads;Multilingual;Productstandards;Properties;Pulloperation;Pushoperation;Pushbuttons;Ratedcurrent;Single-pole;Spacetransport;Specification(approval);Switches;Switchgear;Temperature;Temperature-compensated;Threadfasteners;Three-pole;Tri-polecircuit-breakers;UNCthreadfasteners;Weights
【摘要】:Thisdocumentspecifiestherequiredcharacteristicsforsingle-poletemperaturecompensatedcircuitbreakerswithratedcurrentsfrom20Ato50A,withmetricthreadfasteners,foruseinaircraftelectricalsystems,atatemperaturebetween-55?and125?andatamaximumaltitudeofZ=15000m.ItshallbeusedtogetherwithEN2794-001.#,,#
【中国标准分类号】:V27
【国际标准分类号】:49_060
【页数】:9P.;A4
【正文语种】:德语


下载地址: 点击此处下载
【英文标准名称】:StandardTestMethodforDensityandUnitWeightofSoilinPlacebytheSand-ConeMethod
【原文标准名称】:用砂锥法现场测定土壤密度和单位重量的标准试验方法
【标准号】:ASTMD1556-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D18.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:砌块(建筑);建筑;施工材料;密度;土壤;测试
【英文主题词】:acceptancetests;compactiontests;degreeofcompaction;densitytests;earthfill;embankments;fieldcontroldensity;fieldtests;inplacedensity;inplacedrydensity;insitudensity;relativedensity;sandcone;soilcompaction;soiltests;un
【摘要】:1.1Thistestmethodmaybeusedtodeterminethein-placedensityandunitweightofsoilsusingasandconeapparatus.1.2Thistestmethodisapplicableforsoilswithoutappreciableamountsofrockorcoarsematerialsinexcessof11/2in.(38mm)indiameter.1.3Thistestmethodmayalsobeusedforthedeterminationofthein-placedensityandunitweightofintactorinsitusoils,providedthenaturalvoidorporeopeningsinthesoilaresmallenoughtopreventthesandusedinthetestfromenteringthevoids.Thesoilorothermaterialbeingtestedshouldhavesufficientcohesionorparticleattractiontomaintainstablesidesonasmallholeorexcavation,andbefirmenoughtowithstandtheminorpressuresexertedindiggingtheholeandplacingtheapparatusoverit,withoutdeformingorsloughing.1.4Thistestmethodisnotsuitablefororganic,saturated,orhighlyplasticsoilsthatwoulddeformorcompressduringtheexcavationofthetesthole.Thistestmethodmaynotbesuitableforsoilsconsistingofunboundgranularmaterialsthatwillnotmaintainstablesidesinthetesthole,soilscontainingappreciableamountsofcoarsemateriallargerthan11/2in.(38mm),andgranularsoilshavinghighvoidratios.1.5Whenmaterialstobetestedcontainappreciableamountsofparticleslargerthan11/2in.(38mm),orwhentestholevolumeslargerthan0.1ft3(2830cm3)arerequired,TestMethodD4914orD5030areapplicable.1.6Itiscommonpracticeintheengineeringprofessiontoconcurrentlyusepoundstorepresentbothaunitofmass(lbm)andaunitofforce(lbf).Thisimplicitlycombinestwoseparatesystemsofunits,thatis,theabsolutesystemandthegravitationalsystem.Itisscientificallyundesirabletocombinetheuseoftwoseparatesetsofinch-poundunitswithinasinglestandard.Thistestmethodhasbeenwrittenusingthegravitationalsystemofunitswhendealingwiththeinch-poundsystem.Inthissystemthepound(lbf)representsaunitofforce(weight).However,theuseofbalancesorscalesrecordingpoundsofmass(lbm),ortherecordingofdensityinlbm/ft3shouldnotberegardedasnonconformancewiththistestmethod.1.7AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026unlesssupersededbythisstandard.1.7.1Theproceduresusedtospecifyhowdataarecollected,recordedorcalculatedinthisstandardareregardedastheindustrystandard.Inadditiontheyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheusersobjectives;itiscommonpracticetoincreaseorreducesignificantdigitsorreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalyticalmethodsforengineeringdesign.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:7P.;A4
【正文语种】:


基本信息
标准名称:输送钢管落锤撕裂试验方法
英文名称:Drop-weight tear tests of steel pipe
中标分类:
ICS分类: 石油及相关技术 >> 石油和天然气工业设备 >> 石油和天然气工业设备综合
替代情况:被SY/T 6476-2007代替
发布部门:国家石油和化学工业局
发布日期:2000-03-14
实施日期:2000-10-01
首发日期:1900-01-01
作废日期:2008-03-01
出版社:石油工业出版社
出版日期:1900-01-01
页数:12页
适用范围

本标准规定了输送钢管落锤撕裂试验的定义和符号、试验设备、试样、试样的试验、试样的评定和试验报告等内容。本标准适用于外径不小于508mm,钢级不低于L360级输送钢管断裂韧性的测定。

前言

没有内容

目录

没有内容

引用标准

没有内容

所属分类: 石油及相关技术 石油和天然气工业设备 石油和天然气工业设备综合

版权声明:所有资料均为作者提供或网友推荐收集整理而来,仅供爱好者学习和研究使用,版权归原作者所有。
如本站内容有侵犯您的合法权益,请和我们取得联系,我们将立即改正或删除。
京ICP备14017250号-1