JB/T 7531-1994 旋压件设计规范
作者:标准资料网 时间:2024-05-05 02:57:34 浏览:8491
来源:标准资料网
基本信息
标准名称: | 旋压件设计规范 |
中标分类: |
机械 >>
加工工艺 >>
锻压 |
替代情况: | 被JB/T 7531-2005代替 |
发布日期: | 1994-10-25 |
实施日期: | 1995-10-01 |
首发日期: | 1900-01-01 |
作废日期: | 2005-09-01 |
出版日期: | 1900-01-01 |
页数: | 5页 |
适用范围
被JB/T 7531-2005代替
前言
没有内容
目录
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引用标准
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所属分类: 机械 加工工艺 锻压
基本信息
标准名称: | 冷冲模滚动导向铸铁模架 后导柱铸铁模架 |
中标分类: |
|
发布日期: | 1990-09-18 |
实施日期: | 1990-12-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 5页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类:
【英文标准名称】:StandardPracticeforPerformingAcceleratedOutdoorWeatheringofPressure-SensitiveTapesUsingConcentratedNaturalSunlight
【原文标准名称】:用浓聚的自然光进行压敏带的加速室外老化的标准实施规程
【标准号】:ASTMD5105-2005
【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】:D10.14
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:露天气候;包装件;快速试验;阳光;窄条带材;通风
【英文主题词】:acceleratedoutdoorweathering;naturalsunlight;pressure-sensitivetape
【摘要】:Thispracticeprovidesameansofqualitativeassessmentsofoutdoorweatheringeffectsonpressure-sensitivetapes.Theresistanceoftapestooutdoorweatheringisdeterminedrelativetotheresistanceofacontroltapewithknownstability.Iftestsdescribedinthispracticeproducethesametypeofdegradationasfoundinreal-timeexposuresofthesamematerials,itispossibletousetheresultsfromtheseshort-termteststodeterminethequantitativeeffectsofnaturalweathering.Thetimingofexposuretestingcoveringbothoutdoorconventionalandoutdooracceleratedexposureofthispractice,usinglevelsofultravioletsolarradiationexposure(MJ/m2)ofUV(295to385nm)isanimprovementinthetimingofexposuretesting.Testingspecificlevelsofsolarradiantexposure(MJ/m2)maybeusedtoestablishrelativeequivalentexposure,buttheuseof(MJ/m2ofUV(295to385nm))isthepreferredmethod.4,5,6Theradiantexposure(308or616MJ/m2)suggestedinthispracticeapproximatesoneandtwoyears,respectively,ofexposureintheSouthwestandFlorida.Sinceallmaterialsx201C;weatherx201D;atdifferentratesindifferentenvironments,resultsobtainedusingthispracticeshouldnotberepresentedasequivalenttonaturalweatheringuntilthedegreeofquantitativecorrelationhasbeenestablishedforthematerialtestedintheenvironmentofitsuse.Note18212;Theultravioletcontentofnaturalsunshineistime-of-yeardependent,bothqualitativelyandquantitatively.Thus,wintertimetestingrequireslongerexposureperiodsontheFlesnel-reflectortestmachinesdescribedtoachieveequalultravioletenergydepositionandaquantitativeequallevelofdegradationconcomitantwithsummertimetesting.1.1Thispracticecoversoneprocedurefortheexposureofpressure-sensitivetapestoanacceleratedoutdoorweatheringenvironment.1.2Thispracticedescribessamplepreparationandanacceleratedoutdoorenvironmenttowhichitshallbeexposed.Itdoesnotspecifywhatobservationsortestsaretobeperformedonthematerialfollowingexposure.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A80
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】: