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【英文标准名称】:Ductileironpipes,fittings,accessoriesandtheirjointsforwaterpipelines-Requirementsandtestmethods
【原文标准名称】:水管道用球墨铸铁管、配件、附件及其接头.要求和试验方法
【标准号】:BSEN545-2002
【标准状态】:作废
【国别】:英国
【发布日期】:2002-07-23
【实施或试行日期】:2002-07-23
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:水常规(实验);配件;输水管道;功能;机械性能;管;定义;功能可靠性;试验;覆层;规范(验收);功能效率;尺寸;铸铁管道;铸铁管;管道工程系统;球墨铸铁;表(数据);管道配件;铸铁;质量保证;附件;管道;作标记;水常规;职能
【英文主题词】:
【摘要】:ThisEuropeanStandardspecifiestherequirementsandassociatedtestmethodsapplicabletoductileironpipes,fittings,accessoriesandtheirjointsfortheconstructionofpipelines:—toconveywater(e.g.potablewater);—withorwithoutpressure;—tobeinstalledbeloworaboveground.Thisstandardisapplicabletopipes,fittingsandaccessorieswhichare:—manufacturedwithsocketed,flangedorspigotends;—normallydeliveredexternallyandinternallycoated;—suitableforfluidtemperaturesbetween0℃and50℃,excludingfrost.Thisstandardcoverspipes,fittingsandaccessoriescastbyanytypeoffoundryprocessormanufacturedbyfabricationofcastcomponents,aswellascorrespondingjoints,inasizerangeextendingfromDN40toDN2000,inclusive.Thisstandardspecifiesrequirementsformaterials,dimensionsandtolerances,mechanicalpropertiesandstandardcoatingsofductileironpipesandfittings.Italsogivesperformancerequirementsforallcomponentsincludingjoints.Jointdesignandgasketshapesareoutsidethescopeofthisstandard.NOTEInthisstandard,allpressuresarerelativepressures,expressedinbars(100kPa=1bar).
【中国标准分类号】:H48
【国际标准分类号】:23_040_10;23_040_40
【页数】:90P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforCorrectionofUnitWeightandWaterContentforSoilsContainingOversizeParticles
【原文标准名称】:含有超大颗粒土壤的单位重量和含水量的修正标准实施规程
【标准号】:ASTMD4718-1987(2007)
【标准状态】:现行
【国别】:
【发布日期】:1987
【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】:D18.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:颗粒;含水量;施工材料;修正;建筑;土壤;工艺;重量
【英文主题词】:oversizeparticles;unitweight;watercontent
【摘要】:CompactiontestsonsoilsperformedinaccordancewithTestMethodsD698,D1557,andD4253placelimitationsonthemaximumsizeofparticlesthatmaybeusedinthetest.Ifasoilcontainscobblesorgravel,orboth,testoptionsmaybeselectedwhichresultinparticlesretainedonaspecificsievebeingdiscarded(forexampletheNo.4(4.75-mm)orthex00BE;-in.(19-mm)orotherappropriatesize),andthetestperformedonthefinerfraction.Theunitweightx2013;watercontentrelationsdeterminedbythetestsreflectthecharacteristicsoftheactualmaterialtested,andnotthecharacteristicsofthetotalsoilmaterialfromwhichthetestspecimenwasobtained.Itiscommonengineeringpracticetouselaboratorycompactiontestsforthedesign,specification,andconstructioncontrolofsoilsusedinearthconstruction.Ifasoilusedinconstructioncontainslargeparticles,andonlythefinerfractionisusedforlaboratorytests,somemethodofcorrectingthelaboratorytestresultstoreflectthecharacteristicsofthetotalsoilisneeded.Thispracticeprovidesamathematicalequationforcorrectingtheunitweightandwatercontentofthetestedfinerfractionofasoil,todeterminetheunitweightandwatercontentofthetotalsoil.Similarly,thispracticeprovidesameansforcorrectingtheunitweightandwatercontentoffieldcompactedsamplesofthetotalsoil,sothatvaluescanbecomparedwiththoseforalaboratorycompactedfinerfraction.Note18212;Whenthispracticeisusedforconstructioncontrol,theusingagencyshouldspecifywhetherthemaximumunitweightvalueusedforreferenceistheunitweightincludingoversizefractionortheunitweightofthefinerfraction.Calculatedvaluesofpercentcompactionbasedonthiscorrectionpracticewillvarydependingonwhichunitweightvalueisusedforreference.1.1Thispracticepresentsaprocedureforcalculatingtheunitweightsandwatercontentsofsoilscontainingoversizeparticleswhenthedataareknownforthesoilfractionwiththeoversizeparticlesremoved.1.2Thepracticealsocanbeusedtocalculatetheunitweightsandwatercontentsofsoilfractionswhenthedataareknownforthetotalsoilsamplecontainingoversizeparticles.1.3Thispracticeisbasedontestsperformedonsoilsandsoil-rockmixturesinwhichtheportionconsideredoversizeisthatfractionofthematerialretainedontheNo.4sieve.Basedonthesetests,thispracticeisapplicabletosoilsandsoil-rockmixturesinwhichupto40%ofthematerialisretainedontheNo.4sieve.Thepracticealsoisconsideredvalidwhentheoversizefractionisthatportionretainedonsomeothersieve,suchasthe3/4-in.sieve,butthelimitingpercentageofoversizeparticlesforwhichthecorrectionisvalidmaybelower.However,thepracticeisconsideredvalidformaterialshavingupto30%oversizeparticleswhentheoversizefractionisthatportionretainedonthe3/4-in.sieve.1.4Thefactorcontrollingthemaximumpermissiblepercentageofoversizeparticlesiswhetherinterferencebetweentheoversizeparticlesaffectstheunitweightofthefinerfraction.Forsomegradations,thisinterferencemaybegintooccuratlowerpercentagesofoversizeparticles,sothelimitingpercentagemustbelowerforthesematerialstoavoidinaccuraciesinthecomputedcorrection.Thepersonoragencyusingthispracticeshalldeterminewhetheralowerpercentageistobeused.1.5Thispracticemaybeappliedtosoilswithanypercentageofoversizeparticlessubjecttothelimitationsgivenin1.4and.However,thecorrectionmaynotbeofpracticalsignificanceforsoilswithonlysmallperc......
【中国标准分类号】:Z18
【国际标准分类号】:93_020
【页数】:3P.;A4
【正文语种】: