What is Nominal Diameter (DN)? - Trenchlesspedia

文章推薦指數: 80 %
投票人數:10人

Nominal Diameter is also known as the mean or average outside diameter and is represented by DN. It is neither equal to the inner diameter ... Dictionary Dictionary TermoftheDay ContactGrouting Contactgroutingistheprocessoffillingvoidsbetweentwosurfacesthatareincontactwitheachother.Thereareavarietyofapplicationsforcontactgroutingintheinstallationandrehabilitationofpipes.Thedevelopmentoftrenchlessconstructiontechniqueslikegroutingcontributestothe... ViewFullTerm TrendingTerms HoopStress Invertlevel NominalDiameter Trenching HydraulicRadius WaterColumn AxialLoad CoreCutterMethod Centralpowerstation CrossSectionalArea TrenchlesspediaTerms # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Topics Topics Excavation ConventionalTunneling Boring Installation PipeBursting Equipment WhyHDDPullbackDesignandPlanningIsKey HDDinToughConditions:DrillingBetweenaRockandaHardPlace It'sthePits:PitsandExcavationsinaTrenchlessProject,APrimer HydrovacSafety:Top5BestProcedurestoFollow TrenchlessSewerRepair:ToTrenchorNottoTrench? TheBenefitsofTrenchlessTechnologytotheUtilityIndustryinAsia AnUnboringYetBasicGuidetoBoring HowTunnelBoringMachinesWork TheKeyPrinciplesofEffectiveSolidsControl WhatisHorizontalDirectionalDrilling? WhyReamersAreImportanttoTrenchlessBoring,PlusAvailableTypesofReamers PlanningaBoreForaTrenchlessProject?HereAre5ImportantFactorstoConsider HowImpactMolingWorks WhatisHorizontalDirectionalDrilling? KeyConsiderationsforBenchingDesign TheHistoryofVitrifiedClayPipeinTrenchlessInstallation UnderstandingTrenchlessLateralRehabilitation ControllingHydrogenSulfideCorrosioninSewerPipelines TrenchlessTechnologyinIndia:AnEverGrowingPopulationNeedsTrenchlessInnovation TrenchlessRehabilitationforGasLines:HowtoDetectaGasLeak AnOverviewofRoboticPipeRepair WhyReamersAreImportanttoTrenchlessBoring,PlusAvailableTypesofReamers TheImportanceofMudRecyclinginHDD ProperMaintenanceforDrillRigEquipment Q&A Guides Follow Connectwithus SubscribeToOurNewsletters Signup Thankyouforsubscribingtoournewsletter! Byclickingsignup,youagreetoreceiveemailsfromTrenchlesspediaandagreetoourTermsofUseandPrivacyPolicy. More About AdvertisingInfo Contributors Newsletters WriteforUs Contact Connectwithus SubscribeToOurNewsletters Signup TermoftheDay BestofTrenchlesspedia(weekly) NewsandSpecialOffers(occasional) Byclickingsignup,youagreetoreceiveemailsfromTrenchlesspediaandagreetoourTermsofUseandPrivacyPolicy. Advertisement Dictionary TrenchlessConstruction HorizontalDirectionalDrilling NominalDiameter(DN) NominalDiameter(DN) Lastupdated:March4,2021 WhatDoesNominalDiameter(DN)Mean? NominalDiameterisalsoknownasthemeanoraverageoutsidediameterandisrepresentedbyDN.Itisneitherequaltotheinnerdiameter(ID)northeouterdiameter(OD)ofthepipe.Nominalisawordthatdenotesnon-specificityandinthiscase,identifiestheapproximateinnerdiameterwithanon-dimensionalnumber.Pipeshavingidenticalnominaldiameterscanbeeasilyconnectedorinterchangedwitheachother.PipesareavailableindifferentDNsizesandtheDNisusedtoarriveatthepipedimensionsusingstandardtablesandschedules.TheactualinnerdiameterofpipesfromdifferentmanufacturerscandeviatebyseveralmillimetersandsuchpipescanbecombinediftheDNisindicatedwithreferencetostandards. Advertisement TrenchlesspediaExplainsNominalDiameter(DN) Thevalueofthenominaldiameterisclosetotheinnerdiameterofthepipebutnotequaltoit,andisadoptedinordertounifytheconnectingdimensionsofthepipeandpipefittings.ThenominaldiameterisspecifiedusingDNfollowedbyadimensionlessnumberwhichcorrespondstotheapproximateinnerdiameterofthepipe.Generally,apipehasanouter,inner,andnominaldiameter,wherethenominaldiameteristheoneusedfordesigndrawings.Thisstandardisconvenientfordesigningandmanufacturingandalsoforspecifyingthenameofthepipeorpipefitting.Pipesaremanufacturedfromavarietyofmaterialssuchasconcrete,castiron,polyethylene(PVC),high-densitypolyethylene(HDPE),andglass-reinforcedplastic(GRP).Forplumbingworks,pipesizeisreferredtoasnominalpipesize(NPS)whosemetricequivalentisthenominaldiameter(DN)andconformtotheInternationalStandardsOrganization(ISO).Thetermsnominalbore(NB)andDNareusedinterchangeablywithNPS.DNistheEuropeanequivalentofNPSbutshowspipesizesdifferentlythanNPS.A2-inchpipemaysimplybereferredtoasDN50andtoconvertNPStoDNithastobemultipliedby25.BasedontheNPSandpipeschedule,theODandpipethicknesscanbeobtainedfromstandardreferencetables.ForaspecifiedNPS,theODremainsconstantandthewallthicknessincreaseswiththeschedule.Similarly,foragivenschedule,theODwillincreasewithNPSwhilethicknessstaysconstantorincreases. Advertisement SharethisTerm RelatedTerms BypassDiameter DiameterofReamer Microtunneling CarrierPipe HeavyWallPipe TrenchlessConstruction PipeJoints PipeSegment Pipelining RelatedReading Down-the-HoleDrillingMethodExplained Pressure:WhyIt’stheKeytoPreventingInadvertentReturns EnvironmentalInspection:TheNewNormalforTrenchlessProjects TheKeyPrinciplesofEffectiveSolidsControl WhyHDDPullbackDesignandPlanningIsKey DitchingtheMud:YourGuidetoDrillingMudDisposal Tags TunnelingHorizontalDirectionalDrillingTrenchlessConstruction TrendingArticles TrenchlessConstruction Understandingthe4StagesofSiteInvestigation TrenchlessRehabilitation The5BestPipeJoiningMethodsYouCanAlwaysDependOn TrenchlessRehabilitation HowtoTellifYourHomeHasAsbestosCementPipes TrenchlessConstruction EverythingYouNeedtoKnowAboutPipeJacking Don’tMisstheLatestFromTrenchlesspedia! Subscribetoournewslettertogetexpertadviceandtopinsightsintoeveryaspectoftrenchlessconstructionandrehabilitation.Wecreatetopeducationalcontentforandaboutthetrenchlessindustry,insuringyouhavetheknowledgeyouneedforsuccessfultrenchlessprojects. Signup Thankyouforsubscribingtoournewsletter! LatestArticles Pressure:WhyIt’stheKeytoPreventingInadvertentReturns By:TabithaMishra |CivilEngineer,TechnicalContentWriter EnvironmentalInspection:TheNewNormalforTrenchlessProjects By:TrenchlesspediaStaff TheKeyPrinciplesofEffectiveSolidsControl By:TabithaMishra |CivilEngineer,TechnicalContentWriter WhyHDDPullbackDesignandPlanningIsKey By:DellaAnggabrata |CivilEngineer Advertisement Advertisement close



請為這篇文章評分?