GB/T 12221-1989 法兰连接金属阀门 结构长度
作者:标准资料网 时间:2024-05-02 08:31:02 浏览:8431
来源:标准资料网
基本信息
标准名称: | 法兰连接金属阀门 结构长度 |
英文名称: | Metal valves for use in flanged pipe systems-Face-to-face and centre-to-face dimensions |
中标分类: |
机械 >>
通用零部件 >>
阀门 |
ICS分类: |
流体系统和通用件 >>
阀门
|
替代情况: | JB 97-1975 JB 98-1975 JB 1686-1975 JB 1687-1975;被GB/T 12221-2005代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1990-01-04 |
实施日期: | 1990-09-01 |
首发日期: | 1990-01-04 |
作废日期: | 2005-08-01 |
归口单位: | 合肥通用机械研究所 |
起草单位: | 合肥通用机械研究所 |
出版日期: | 1900-01-01 |
页数: | 平装16开, 页数:16, 字数:28000 |
适用范围
本标准规定了法兰连接金属阀门(直通式和角式)的结构长度。本标准适用于公称压力PN0.1~16MPa,公称通径DN10~3000mm的闸阀、截止阀、球阀、蝶阀、旋塞阀、隔膜阀、止回阀的结构长度。
前言
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目录
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引用标准
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所属分类: 机械 通用零部件 阀门 流体系统和通用件 阀门
Product Code:SAE J63
Title:Hole Placement on Dozer End Bits
Issuing Committee:Mtc Sc6, Ground Engaging Tools
Scope:It is the purpose of the SAE Recommended Practice to define the minimum requirements for hole placement on Dozer End Bit supports. The recommended practice applies to straight blade, angling blade, U blade, and semi-U blades used on earthmoving tractors per SAE J1057a up to a maximum weight of 100,000 lb (45,000 kg).【英文标准名称】:TestMethodforCrystallographicPerfectionofGalliumArsenidebyMoltenPotassiumHydroxide(KOH)EtchTechnique
【原文标准名称】:用熔融氢氧化钾腐蚀技术测试砷化镓结晶完整性的标准试验方法
【标准号】:ASTMF1404-1992(2007)
【标准状态】:现行
【国别】:美国
【发布日期】:1992
【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】:F01.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:crystalperfection;etchpitdensity;galliumarsenide;potassiumhydroxideetch;semiconductor;singlecrystal;Contaminationsemiconductors;Crystallatticestructure;Defectssemiconductors;Densityelectronicapplications;Etching(materials/process);
【摘要】:TheuseofGaAsforsemiconductordevicesrequiresaconsistentatomiclatticestructure.However,latticeorcrystallinedefectsofvarioustypesandquantitiesarealwayspresent,andrarelyhomogeneouslydistributed.Itisimportanttodeterminethemeanvalueandthespatialdistributionoftheetchpitdensity.1.1Thistestmethodisusedtodeterminewhetheraningotorwaferofgalliumarsenideismonocrystallineand,ifso,tomeasuretheetchpitdensityandtojudgethenatureofcrystalimperfections.Totheextentpossible,itfollowsthecorrespondingtestmethodforsilicon,TestMethodF47.TestMethodF47alsopresentsthedefinitionofmanycrystallographicterms,applicabletothistestmethod.1.2Thisprocedureissuitableforgalliumarsenidecrystalswithetchpitdensitiesbetween0and200000/cm2.1.3Galliumarsenide,eitherdopedorundoped,andwithvariouselectricalproperties,maybeevaluatedbythistestmethod.Thefrontsurfacenormaldirectionofthesamplemustbeparalleltothex003C;001>withinx00B1;5x00B0;andmustbesuitablypreparedbypolishingoretching,orboth.Unremovedprocessingdamagemayleadtoetchpits,obscuringthequalityofthebulkcrystal.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninSection8.
【中国标准分类号】:H83
【国际标准分类号】:71_060_50
【页数】:6P.;A4
【正文语种】:英语