DIN 66021 T.10-1981 在电话线路中平行数据传输用的DEE和DUE间的接口

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【英文标准名称】:StandardTestMethodforDeterminingTheRelativeDensity(SpecificGravity)AndAbsorptionOfFineAggregatesUsingInfrared
【原文标准名称】:相对密度(特殊重力)和用红外线对细集料吸收测定的标准测试方法
【标准号】:ASTMD7172-2006
【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】:D04.51
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:吸收;测定;细集料;重力;红外线;相对密度;试验
【英文主题词】:absorption;aggregate;apparentdensity;apparentrelativedensity;infrared;relativedensity;specificgravity
【摘要】:Bulkrelativedensity(specificgravity)isthecharacteristicgenerallyusedforcalculationofthevolumeoccupiedbytheaggregateinvariousmixturescontainingaggregateincludingPortlandcementconcrete,bituminousconcrete,andothermixturesthatareproportionedoranalyzedonanabsolutevolumebasis.Bulkrelativedensity(specificgravity)isusedinthecomputationofvoidsinaggregateinC1252andC29/C29M.Bulkrelativedensity(specificgravity)determinedonthesaturatedsurfacedry(SSD)basisisusediftheaggregateiswet,thatis,ifitsabsorptionhasbeensatisfied.Conversely,thebulkrelativedensity(specificgravity)determinedontheoven-drybasisisusedforcomputationswhentheaggregateisdryorassumedtobedry.Apparentrelativedensity(specificgravity)pertainstotherelativedensityofthesolidmaterialmakinguptheconstituentparticlesnotincludingtheporespacewithintheparticlesthatisaccessibletowater.Thisvalueisnotwidelyusedinconstructionaggregatetechnology.Waterabsorptionvaluesareusedtocalculatethechangeinthemassofanaggregateduetowaterabsorbedintheporespaceswithintheconstituentparticles,comparedtothedrycondition,whenitisdeemedthattheaggregatehasbeenincontactwithwaterlongenoughtosatisfymostoftheabsorptionpotential.Thelaboratorystandardforabsorptionisthatobtainedaftersubmergingdryaggregateforapproximately24hoursinwater.Aggregatesminedfrombelowthewatertablemayhaveahigherabsorptionwhenused,ifnotallowedtodry.Conversely,someaggregateswhenusedmaycontainanamountofabsorbedmoisturelessthanthe24hourssoakedcondition:Foranaggregatethathasbeenincontactwithwaterandthathadfreemoistureontheparticlesurface,thepercentageoffreemoisturecanbedeterminedbydeductingtheabsorptionfromthetotalmoisturecontentdeterminedaccordingtoC566bydrying.1.1Thistestmethodcoversthedeterminationoftherelativedensity(specificgravity)andabsorptionoffineaggregates.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:StandardSpecificationforNon-ReinforcedExtrudedTeeConnectionsforPipingApplications
【原文标准名称】:管道系统用非增强挤制T形接头标准规范
【标准号】:ASTMF2014-2000(2006)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:F25.11
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:extrudedoutlet;mechanicallyformedteeconnections;outlets;teeconnections
【摘要】:1.1Thisspecificationcoversthepipematerialsanddimensionsforproducingnon-reinforcedextrudedteeconnectionsmanufacturedbymechanicalformingprocesses.Theterm"extrudedteeconnection"appliestobutt-weldorsocket-weldconnections.Thisspecificationreferstotheformingprocessthatleadstoweldingorbrazing.1.2Thenon-reinforcedextrudedpipeteeconnectionisanalternativetotheteefittings,nozzle,andotherweldedconnections.1.3Thenon-reinforcedextrudedpipeteeconnectionhasbeenwidelyusedforsystemsinthemarine,processpiping,food,pharmaceutical,andsimilarindustries.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5TheextrudedteeconnectionwillbeweldedinaccordancewithSpecificationF722.BrazingofteeconnectionswillbeinaccordancewithANSIB31.5.
【中国标准分类号】:J15
【国际标准分类号】:23_040_60
【页数】:16P.;A4
【正文语种】: