ASTM D 4434-2006 聚氯乙烯屋顶板的标准规范
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来源:标准资料网
【英文标准名称】:StandardSpecificationforPoly(VinylChloride)SheetRoofing
【原文标准名称】:聚氯乙烯屋顶板的标准规范
【标准号】:ASTMD4434-2006
【标准状态】:现行
【国别】:美国
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑;施工材料;塑料;聚氯乙烯;屋顶层;屋面油毡;屋顶;防水材料
【英文主题词】:Construction;Constructionmaterials;Plastics;Polyvinylchloride;Roofcoverings;Roofingfelts;Roofs;Waterproofingmaterials
【摘要】:
【中国标准分类号】:Q17
【国际标准分类号】:91_100_50
【页数】:4P;A4
【正文语种】:英语
基本信息
标准名称: | 紧固件 螺栓和螺钉通孔 |
英文名称: | Fasteners; Clearance holes for bolts and screws |
中标分类: |
建材 >>
建材产品 >>
纤维增强复合材料 |
ICS分类: |
机械系统和通用件 >>
紧固件 >>
螺栓、螺钉、螺柱
|
替代情况: | GB 152-1976 |
发布部门: | 中国机械工业联合会 |
发布日期: | 1989-03-03 |
实施日期: | 1986-06-01 |
首发日期: | 1985-08-01 |
作废日期: | 1900-01-01 |
主管部门: | 中国机械工业联合会 |
归口单位: | 全国紧固件标准化技术委员会 |
起草单位: | 机械委标准所 |
出版日期: | 1900-01-01 |
页数: | 3页 |
适用范围
本标准规定了螺纹规格为M1~M150的螺栓和螺钉用通孔尺寸。本标准等效采用国际标准ISO 273—1979《紧固件—螺栓和螺钉通孔》。
前言
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目录
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引用标准
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所属分类: 建材 建材产品 纤维增强复合材料 机械系统和通用件 紧固件 螺栓 螺钉 螺柱
【英文标准名称】:StandardPracticeforConductingMixedFlowingGas(MFG)EnvironmentalTests
【原文标准名称】:传导混流气的环境试验的标准实施规程
【标准号】:ASTMB827-2005(2009)e2
【标准状态】:现行
【国别】:美国
【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】:B02.11
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:airvelocity;chlorine;corrosion;corrosivegastesting;corrosivity;corrosivitymonitor;coulometry;environmental;humidity;hydrogensulfide;mixedflowinggas;nitrogenoxide;pollutant;porecorrosion;quartzcrystalmicrobalance;resistancemonito
【摘要】:Mixedflowinggas(MFG)testsareusedtosimulateoramplifyexposuretoenvironmentalconditionswhichelectricalcontactsorconnectorscanbeexpectedtoexperienceinvariousapplicationenvironments(1,2).TestsampleswhichhavebeenexposedtoMFGtestshaverangedfrombaremetalsurfaces,toelectricalconnectors,andtocompleteassemblies.Thespecifictestconditionsareusuallychosensoastosimulate,inthetestlaboratory,theeffectsofcertainrepresentativefieldenvironmentsorenvironmentalseveritylevelsonstandardmetallicsurfaces,suchascopperandsilvercouponsorporousgoldplatings(1,2).BecauseMFGtestsaresimulations,boththetestconditionsandthedegradationreactions(chemicalreactionrate,compositionofreactionproducts,etc.)maynotalwaysresemblethosefoundintheserviceenvironmentoftheproductbeingtestedintheMFGtest.AguidetotheselectionofsimulationconditionssuitableforavarietyofenvironmentsisfoundinGuideB845.TheMFGexposuresaregenerallyusedinconjunctionwithprocedureswhichevaluatecontactorconnectorelectricalperformancesuchasmeasurementofelectricalcontactresistancebeforeandafterMFGexposure.TheMFGtestsareusefulforconnectorsystemswhosecontactsurfacesareplatedorcladwithgoldorotherpreciousmetalfinishes.Forsuchsurfaces,environmentallyproducedfailuresareoftenduetohighresistanceorintermittencescausedbytheformationofinsulatingcontaminationinthecontactregion.Thiscontamination,intheformoffilmsandhardparticles,isgenerallytheresultofporecorrosionandcorrosionproductmigrationortarnishcreepagefromporesinthepreciousmetalcoatingandfromunplatedbasemetalboundaries,ifpresent.TheMFGexposurescanbeusedtoevaluatenovelelectricalcontactmetallizationforsusceptibilitytodegradationduetoenvironmentalexposuretothetestcorrosivegases.TheMFGexposurescanbeusedtoevaluatetheshieldingcapabilityofconnectorhousingswhichmayactasabarriertotheingressofcorrosivegases.TheMFGexposurescanbeusedtoevaluatethesusceptibilityofotherconnectormaterialssuchasplastichousingstodegradationfromthetestcorrosivegases.TheMFGtestsarenotnormallyusedasporositytests.Foraguidetoporositytesting,seeGuideB765.TheMFGtestsaregenerallynotapplicablewherethefailuremechanismisotherthanpollutantgascorrosionsuchasintin-coatedseparablecontacts.1.1Thispracticeprovidesproceduresforconductingenvironmentaltestsinvolvingexposurestocontrolledquantitiesofcorrosivegasmixtures.1.2Thispracticeprovidesfortherequiredequipmentandmethodsforgas,temperature,andhumiditycontrolwhichenableteststobeconductedinareproduciblemanner.Reproducibilityismeasuredthroughtheuseofcontrolcouponswhosecorrosionfilmsareevaluatedbymassgain,coulometry,orbyvariouselectronandX-raybeamanalysistechniques.Reproducibilitycanalsobemeasuredbyinsitucorrosionratemonitorsusingelectricalresistanceormass/frequencychangemethods.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateMaterialSafetyData......
【中国标准分类号】:G86
【国际标准分类号】:71_100_20
【页数】:9P.;A4
【正文语种】:英语