ICS: 23.040.01

Bureau for Standarisation

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© NBN 2017

Belgian Standard

EN 13480-3:2017

NBN EN 13480-3:2017

Metallic industrial piping - Part 3: Design and calculation

Valid from 19-07-2017

Replaces NBN EN 13480-3:2012

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EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN 13480-3 June 2017

ICS 23.040.01 Supersedes EN 13480-3:2012English Version Metallic industrial piping - Part 3: Design and calculationTuyauteries industrielles métalliques - Partie 3 : Conception et calcul Industrielle metallische Rohrleitungen - Teil 3: Konstruktion und Berechnung

This European Standard was approved by CEN on 21 June 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13480-3:2017 E

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Contents

Page

Europeanforeword....................................................................................................................................................10 

1 Scope.................................................................................................................................................................12 

2 Normativereferences.................................................................................................................................12 

3 Terms,definitions,symbolsandunits.................................................................................................13 3.1 Termsanddefinitions................................................................................................................................13 3.2 Symbolsandunits........................................................................................................................................13 

4 Basicdesigncriteria....................................................................................................................................15 4.1 General.............................................................................................................................................................15 4.2 Loadings..........................................................................................................................................................15 4.2.1 General.............................................................................................................................................................15 4.2.2 Combinationofloads..................................................................................................................................16 4.2.3 Loadsfordimensioning.............................................................................................................................16 4.2.4 Otherloadstobetakenintoaccount....................................................................................................18 4.2.5 Designconditions.........................................................................................................................................19 4.3 Thickness........................................................................................................................................................22 4.4 Tolerances......................................................................................................................................................25 4.5 Jointcoefficient.............................................................................................................................................25 4.6 Dimensioningofpipingcomponentssubjecttopressure.............................................................26 

5 Designstresses..............................................................................................................................................26 5.1 General.............................................................................................................................................................26 5.2 Time‐independentnominaldesignstress..........................................................................................27 5.2.1 Steelsotherthanausteniticsteels.........................................................................................................27 5.2.2 Austeniticsteels............................................................................................................................................27 5.2.3 Nickeland/orchromiumalloysteels..................................................................................................28 5.2.4 Steelscastings................................................................................................................................................28 5.2.5 Additionalrequirementsforsteelswithnospecificcontrol........................................................28 5.3 Time‐dependentnominaldesignstress..............................................................................................29 5.3.1 General.............................................................................................................................................................29 5.3.2 Steels.................................................................................................................................................................29 5.3.3 Nickeland/orchromiumalloysteels....................................................................................................30 

6 Designofpipingcomponentsunderinternalpressure.................................................................30 6.1 Straightpipes.................................................................................................................................................30 6.2 Pipebendsandelbows...............................................................................................................................30 6.2.1 General.............................................................................................................................................................30 6.2.2 Symbols............................................................................................................................................................31 6.2.3 Requiredwallthicknesses........................................................................................................................31 6.3 Mitrebends.....................................................................................................................................................32 6.3.1 General.............................................................................................................................................................32 6.3.2 Symbols............................................................................................................................................................32 6.3.3 Effectiveradiusofmitrebend.................................................................................................................33 6.3.4 Multiplemitrebends..................................................................................................................................33 6.3.5 Singlemitrebends.......................................................................................................................................34 

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6.3.6 Adjacentstraightpipesectionsofmitrebends.................................................................................34 6.4 Reducers..........................................................................................................................................................34 6.4.1 Conditionsofapplicability........................................................................................................................34 6.4.2 Specificdefinitions.......................................................................................................................................35 6.4.3 Specificsymbolsandabbreviations.......................................................................................................35 6.4.4 Conicalshells..................................................................................................................................................36 6.4.5 Junctions‐general........................................................................................................................................37 6.4.6 Junctionbetweenthelargeendofaconeandacylinderwithoutaknuckle..........................37 6.4.7 Junctionbetweenthelargeendofaconeandacylinderwithaknuckle................................40 6.4.8 Junctionbetweenthesmallendofaconeandacylinder..............................................................41 6.4.9 Offsetreducers..............................................................................................................................................43 6.4.10 Specialforgedreducers..............................................................................................................................43 6.5 Flexiblepipingcomponents......................................................................................................................44 6.5.1 General.............................................................................................................................................................44 6.5.2 Expansionjoints............................................................................................................................................44 6.5.3 Corrugatedmetalhoseassemblies........................................................................................................46 6.6 Boltedflangeconnections.........................................................................................................................47 6.6.1 General.............................................................................................................................................................47 6.6.2 Symbols............................................................................................................................................................47 6.6.3 Standardflange.............................................................................................................................................47 6.6.4 Non‐standardflange....................................................................................................................................48 

7 Designofendsunderinternalpressure...............................................................................................48 7.1 Dishedends.....................................................................................................................................................48 7.1.1 Symbols............................................................................................................................................................48 7.1.2 Hemisphericalends.....................................................................................................................................49 7.1.3 Torisphericalends.......................................................................................................................................50 7.1.4 Ellipsoidalends.............................................................................................................................................51 7.1.5 Calculationof..............................................................................................................................................52 7.2 Circularflatends...........................................................................................................................................56 7.2.1 General.............................................................................................................................................................56 7.2.2 Symbols............................................................................................................................................................56 7.2.3 Unstayedflatcircularendsweldedtocylindricalshells/pipes...................................................58 7.2.4 Unstayedflatcircularboltedends..........................................................................................................65 7.2.5 Reinforcementsofopeningsinunstayedflatends..........................................................................71 

8 Openingsandbranchconnections.........................................................................................................74 8.1 General.............................................................................................................................................................74 8.2 Symbols............................................................................................................................................................74 8.3 Limitations......................................................................................................................................................75 8.3.1 Thicknessratio..............................................................................................................................................75 8.3.2 Openingsinthevicinityofdiscontinuities..........................................................................................77 8.3.3 Typesofreinforcement..............................................................................................................................79 8.3.4 Calculationmethod......................................................................................................................................80 8.3.5 Ellipticalopeningsandobliquebranchconnections.......................................................................80 8.3.6 Reinforcingpads...........................................................................................................................................82 8.3.7 Dissimilarmaterialofshellandreinforcements..............................................................................82 8.3.8 Extrudedoutlets............................................................................................................................................82 8.3.9 Forgedtee........................................................................................................................................................82 8.3.10 Branchesinbendsorelbows....................................................................................................................83 8.3.11 Screwed‐inbranches...................................................................................................................................83 8.4 Isolatedopenings..........................................................................................................................................84 8.4.1 General.............................................................................................................................................................84 8.4.2 Unreinforcedopenings...............................................................................................................................87 

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8.4.3 Reinforcedopeningswithdi/Di<0,8..................................................................................................87 8.4.4 Reinforcedsingleopeningswith0,8<d/D1,0..............................................................................93 8.5 Adjacentopenings........................................................................................................................................93 8.5.1 Unreinforcedopenings...............................................................................................................................93 8.5.2 Reinforcedopeningswithd/D0,8......................................................................................................93 8.6 Designofspecialpipingcomponents....................................................................................................94 8.6.1 CylindricalY‐pieces.....................................................................................................................................94 8.6.2 SphericalY‐pieces........................................................................................................................................95 8.6.3 Triformreinforcedbranches...................................................................................................................96 

9 Designofpipingcomponentsunderexternalpressure.................................................................97 9.1 General.............................................................................................................................................................97 9.2 Symbolsandelasticstresslimits............................................................................................................99 9.2.1 Symbols............................................................................................................................................................99 9.2.2 Elasticstresslimits....................................................................................................................................101 9.3 Cylindricalpipes,elbowsandmitrebends.......................................................................................101 9.3.1 Determinationoflengths........................................................................................................................101 9.3.2 Interstiffenercollapse..............................................................................................................................103 9.3.3 Overallcollapseofstiffenedpipes.......................................................................................................105 9.3.4 Stiffenerstability........................................................................................................................................106 9.3.5 Heating/coolingchannels.......................................................................................................................109 9.4 Reducers(conicalshells)........................................................................................................................110 9.5 Dishedends..................................................................................................................................................112 9.5.1 Hemisphericalends...................................................................................................................................112 9.5.2 Torisphericalends.....................................................................................................................................113 9.5.3 Ellipsoidalends...........................................................................................................................................113 

10 Designforcyclicloading..........................................................................................................................113 10.1 General...........................................................................................................................................................113 10.2 Exemptionfromdetailedfatigueanalysis........................................................................................113 10.3 Fatiguedesignforcyclicpressure........................................................................................................114 10.3.1 Equivalentfullloadcycles.......................................................................................................................114 10.3.2 Simplifiedfatigueanalysis......................................................................................................................114 10.4 Fatiguedesignforthermalgradients.................................................................................................129 10.4.1 General...........................................................................................................................................................129 10.4.2 Designguidance..........................................................................................................................................129 10.5 Fatiguedesignforcombinedloads......................................................................................................130 

11 Integralattachments.................................................................................................................................130 11.1 General...........................................................................................................................................................130 11.2 Allowablestresses.....................................................................................................................................130 11.3 Symbols..........................................................................................................................................................131 11.4 Hollowcircularattachments..................................................................................................................133 11.4.1 Limitations....................................................................................................................................................133 11.4.2 Preliminarycalculations.........................................................................................................................133 11.4.3 Analysisofattachmentsweldedtopipewithafullpenetrationweld....................................135 11.4.4 Analysisofattachmentsweldedtopipewithfilletorpartialpenetrationweld................136 11.5 Rectangularattachments........................................................................................................................136 11.5.1 Limitations....................................................................................................................................................136 11.5.2 Preliminarycalculations.........................................................................................................................136 11.5.3 Analysisofattachmentsweldedtopipewithafullpenetrationweld....................................138 11.5.4 Analysisofattachmentsweldedtopipewithfilletorpartialpenetrationweld................139 11.6 Stressanalysisoftherunpipe...............................................................................................................139 11.7 Shearstressanalysisinattachment....................................................................................................141 

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11.7.1 Hollowcircularattachments.................................................................................................................141 11.7.2 Rectangularattachments........................................................................................................................141 11.8 Alternativecalculationmethods..........................................................................................................141 

12 Flexibilityanalysisandacceptancecriteria.....................................................................................141 12.1 Basicconditions.........................................................................................................................................141 12.1.1 General..........................................................................................................................................................141 12.1.2 Loadingconditions....................................................................................................................................142 12.1.3 Allowablestresses.....................................................................................................................................142 12.2 Pipingflexibility.........................................................................................................................................144 12.2.1 General..........................................................................................................................................................144 12.2.2 Basicconditions.........................................................................................................................................144 12.2.3 Displacementstrains................................................................................................................................144 12.2.4 Displacementstresses.............................................................................................................................145 12.2.5 Stressrange.................................................................................................................................................146 12.2.6 Coldpull........................................................................................................................................................146 12.2.7 Propertiesforflexibilityanalysis........................................................................................................147 12.2.8 Supportingconditions.............................................................................................................................147 12.2.9 Expansionjoints.........................................................................................................................................149 12.2.10Flexibilityanalysis....................................................................................................................................149 12.3 Flexibilityanalysis....................................................................................................................................151 12.3.1 General..........................................................................................................................................................151 12.3.2 Stressduetosustainedloads................................................................................................................152 12.3.3 Stressduetosustainedandoccasionalorexceptionalloads....................................................152 12.3.4 Stressrangeduetothermalexpansionandalternatingloads.................................................153 12.3.5 Additionalconditionsforthecreeprange........................................................................................154 12.3.6 Stressesduetoasinglenon‐repeatedsupportmovement........................................................154 12.3.7 Determinationofresultantmoments................................................................................................155 12.3.8 Alternativemethodforstresscalculation........................................................................................157 12.3.9 Reactions......................................................................................................................................................157 12.4 Fatigueanalysis..........................................................................................................................................157 12.5 Vibration.......................................................................................................................................................157 

13 PipeSupports..............................................................................................................................................158 13.1 Generalrequirements..............................................................................................................................158 13.1.1 General..........................................................................................................................................................158 13.1.2 Classificationofsupports........................................................................................................................158 13.1.3 Additionaldefinitions..............................................................................................................................159 13.1.4 Boundaries...................................................................................................................................................161 13.1.5 Pipesupportsweldedtothepipe........................................................................................................163 13.2 Selectionofpipesupports......................................................................................................................164 13.2.1 General..........................................................................................................................................................164 13.2.2 Detaildesignofpipesupports..............................................................................................................165 13.2.3 Supportlocation.........................................................................................................................................166 13.3 Constanthangers/basemounted(pedestal)constantsupports..............................................166 13.3.1 General..........................................................................................................................................................166 13.3.2 Loaddeviationfromcalibratedload..................................................................................................166 13.3.3 Siteadjustmentofthecalibratedload...............................................................................................166 13.3.4 Travelreserve(Overtravel)...................................................................................................................166 13.3.5 Blocking.........................................................................................................................................................167 13.3.6 IdentificationMarking/Nameplate....................................................................................................167 13.4 Variableloadspringhangersandbasemounted(pedestal)variableloadspring

supports........................................................................................................................................................167 13.4.1 General..........................................................................................................................................................167 

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13.4.2 Toleranceonspringrate.........................................................................................................................168 13.4.3 Travelreserve(Overtravel)...................................................................................................................168 13.4.4 Blocking.........................................................................................................................................................168 13.4.5 Nameplate....................................................................................................................................................168 13.5 Rigidstruts...................................................................................................................................................169 13.6 Shockarrestors(shockabsorber,snubber).....................................................................................169 13.7 Slidingsupports..........................................................................................................................................170 13.8 Anchors..........................................................................................................................................................170 13.9 Documentationofsupports....................................................................................................................170 13.10 Markingofsupports..................................................................................................................................170 13.11 Manufacturingofpipesupports...........................................................................................................170 13.11.1Materialrequirements............................................................................................................................170 13.11.2Designtemperaturesforsupportcomponents..............................................................................171 13.11.3Designdetails..............................................................................................................................................172 13.11.4Determinationofcomponentsizes.....................................................................................................173 13.11.5Weldedconnections.................................................................................................................................174 13.11.6Threadedconnections.............................................................................................................................176 13.11.7Additionalrequirementsonsprings..................................................................................................177 13.11.8Designdetailsforrigidstruts...............................................................................................................177 13.11.9Designdetailsforshockarrestors(shockabsorbers,snubbers)............................................178 13.11.10Designdetailsforshockarrestors(shockabsorbers,snubbers)..........................................179 

AnnexA(informative)Dynamicanalysis.........................................................................................................180 A.1 General...........................................................................................................................................................180 A.2 Analysisbycalculation.............................................................................................................................180 A.2.1 Seismicevents.............................................................................................................................................180 A.2.2 Rapidvalveclosure...................................................................................................................................184 A.2.3 Flowinducedvibration............................................................................................................................187 A.2.4 Safetyvalvedischarge..............................................................................................................................189 A.2.5 Allowablestresses.....................................................................................................................................192 A.3 Alternativemeansofdesignverification...........................................................................................192 A.3.1 Comparativestudies.................................................................................................................................192 A.3.2 Fullscaletesting.........................................................................................................................................192 A.3.3 Reducedscaletesting...............................................................................................................................192 

AnnexB(normative)Moreaccuratecalculationofbendsandelbows.................................................193 B.1 General...........................................................................................................................................................193 B.2 Symbolsandunits......................................................................................................................................193 B.3 Requiredwallthickness..........................................................................................................................194 B.4 Calculation....................................................................................................................................................195 B.4.1 Calculationofwallthickness..................................................................................................................195 B.4.2 Stresscalculation.......................................................................................................................................197 

AnnexC(informative)Expansionjoints...........................................................................................................201 C.1 Incorporationofexpansionjointsintopipingsystems................................................................201 C.1.1 General...........................................................................................................................................................201 C.1.2 Typesofexpansionjoints........................................................................................................................202 C.1.3 Designofexpansionjoints......................................................................................................................202 C.1.4 Designingwithexpansionjoints...........................................................................................................203 C.1.5 Analysesandcalculation.........................................................................................................................205 C.1.6 Coldpull.........................................................................................................................................................206 C.2 Maximumspacingforunrestrainedaxiallycompensatedstraightruns...............................206 C.2.1 General...........................................................................................................................................................206 C.2.2 Calculationrules.........................................................................................................................................206 

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C.2.3 Maximumspacingfordefinedconditions........................................................................................207 C.3 Indicationforthedesignofexpansionjoints..................................................................................209 C.3.1 General..........................................................................................................................................................209 C.3.2 Informationforthesystemanalyst.....................................................................................................209 

AnnexD(normative)Flanges...............................................................................................................................210 D.1 Purpose.........................................................................................................................................................210 D.2 Specifictermsanddefinitions...............................................................................................................210 D.3 Specificsymbolsandabbreviations....................................................................................................211 D.4 General..........................................................................................................................................................212 D.4.1 Introduction................................................................................................................................................212 D.4.2 Useofstandardflangeswithoutcalculation....................................................................................212 D.4.3 Bolting............................................................................................................................................................213 D.4.4 Flangeconstruction..................................................................................................................................215 D.4.5 Machining.....................................................................................................................................................215 D.4.6 Gaskets..........................................................................................................................................................215 D.5 Narrowfacegasketedflanges...............................................................................................................216 D.5.1 General..........................................................................................................................................................216 D.5.2 Boltloadsandareas..................................................................................................................................219 D.5.3 Flangemoments.........................................................................................................................................220 D.5.4 Flangestressesandstresslimits..........................................................................................................220 D.5.5 Narrowfaceflangessubjecttoexternalpressure.........................................................................226 D.5.6 Lapjoints......................................................................................................................................................226 D.5.7 Splitringflanges........................................................................................................................................229 D.6 Fullfaceflangeswithsoftringtypegaskets....................................................................................230 D.6.1 Specificsymbolsandabbreviations....................................................................................................231 D.6.2 Boltloadsandareas..................................................................................................................................231 D.6.3 Flangedesign...............................................................................................................................................232 D.6.4 Fullfaceflangessubjecttoexternalpressure.................................................................................233 D.7 Sealweldedflanges...................................................................................................................................233 D.8 Reversenarrowfaceflanges..................................................................................................................234 D.8.1 Internalpressure.......................................................................................................................................234 D.8.2 Externalpressure......................................................................................................................................236 D.9 Reversefullfaceflanges..........................................................................................................................236 D.9.1 General..........................................................................................................................................................236 D.9.2 DesignfollowingmethodofD.5............................................................................................................236 D.9.3 DesignfollowingmethodofD.6............................................................................................................238 D.10 Fullfaceflangeswithmetaltometalcontact..................................................................................240 D.10.1General..........................................................................................................................................................240 D.10.2Specificsymbolsandabbreviations....................................................................................................240 D.10.3Design............................................................................................................................................................241 

AnnexE(normative)Designofbranchconnectionsinpipingaccessories.........................................243 E.1 Scope..............................................................................................................................................................243 E.1.1 General..........................................................................................................................................................243 E.2 Reinforcement............................................................................................................................................245 E.2.1 Anglesandareas........................................................................................................................................245 E.2.2 Thefollowingconditionshallbesatisfied:.......................................................................................245 E.3 Flexibilityanalysis....................................................................................................................................246 

AnnexF(informative)Testingduringoperationinthecaseofcyclicloading...................................248 F.1 Testingduringoperation........................................................................................................................248 F.2 Measurestobetakenwhenthecalculatedfatiguelifehasbeenreached............................248 

AnnexG(informative)Physicalpropertiesofsteels...................................................................................250 

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G.1 General...........................................................................................................................................................250 G.2 Physicalproperties....................................................................................................................................250 G.2.1 Density...........................................................................................................................................................250 G.2.2 Differentialcoefficientoflinearexpansion......................................................................................251 G.2.3 Specificthermalcapacity.........................................................................................................................251 G.2.4 Thermaldiffusivity....................................................................................................................................251 G.2.5 Poisson'sratio.............................................................................................................................................251 G.3 Physicalpropertiesofsteels..................................................................................................................251 

AnnexH(normative)Flexibilitycharacteristics,flexibilityandstressintensificationfactorsandsectionmoduliofpipingcomponentsandgeometricaldiscontinuities........................257 

AnnexI(informative)Productiontestingofspringsupportsandshockarrestors(shockabsorbers)....................................................................................................................................................267 

I.1 Constantloadsupports............................................................................................................................267 I.2 Variablespringsupports.........................................................................................................................267 I.3 Shockarrestors...........................................................................................................................................267 

AnnexJ(normative)Typetestingofsupportcomponents........................................................................272 

AnnexK(informative)Attachmentofsupportstostructures..................................................................274 K.1 Attachmentofsupportstoconcretestructures..............................................................................274 K.2 Attachmenttometallicstructures.......................................................................................................275 K.2.1 Standardbolts.............................................................................................................................................275 K.2.2 Frictiongripbolts......................................................................................................................................275 K.2.3 Welding..........................................................................................................................................................275 

AnnexL(informative)Bucklingoflineartypesupports............................................................................276 L.1 General...........................................................................................................................................................276 L.2 Symbols..........................................................................................................................................................276 L.3 Basic formulae...........................................................................................................................................277 L.4 Allowablecompressivestress...............................................................................................................277 L.5 Bucklinglength...........................................................................................................................................278 

AnnexM(informative)Designguidanceforstructuralcomponents.....................................................280 M.1 Lineartypecomponentssubjectedtobending...............................................................................280 M.1.1 General...........................................................................................................................................................280 M.1.2 Supplementaryverificationsforlineartypesupports.................................................................280 M.2 Stabilityofplatetypesupports.............................................................................................................282 M.3 Anchorageplatesorequivalentanchoragecomponents............................................................282 M.3.1 General...........................................................................................................................................................282 M.3.2 Designofsimpleanchorageplates......................................................................................................282 M.3.3 Fixingplateswithstiffeninggussets...................................................................................................283 M.3.4 Loadcalculationsforanchoragesfixedinconcrete......................................................................283 

AnnexN(normative)Documentationofsupports........................................................................................284 

AnnexO(normative)Alternativemethodforcheckingbranchconnections.....................................286 O.1 Scope...............................................................................................................................................................286 O.2 Symbols..........................................................................................................................................................286 O.3 Designandcheckingofthebranchconnection...............................................................................288 O.3.1 Limitvaluefortheloadduetopressureonlyforstraightpipeswithoutopening............288 O.3.2 Determinationoftheminimumthicknessesunderloadingduetopressureonly............289 O.3.3 Checkingofthethicknessesselectedforthecombinationofpressureloadingand

loadingsduetoexternalloads..............................................................................................................289 

AnnexP(informative)Recommendedgasketsforindustrialpiping.....................................................340 

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AnnexQ(informative)Simplifiedpipestressanalysis...............................................................................342 Q.1 General..........................................................................................................................................................342 Q.2 Simplifiedprocedure................................................................................................................................342 Q.2.1 General..........................................................................................................................................................342 Q.2.2 Specificationofallowablespacingofsupports...............................................................................342 Q.2.3 Checkofelasticity......................................................................................................................................342 Q.3 ExplanatorynotesforTableQ.1...........................................................................................................344 Q.4 Symbols.........................................................................................................................................................346 Q.5 IndicesfL........................................................................................................................................................346 Q.6 ExplanatorynotestoQ.2.2.....................................................................................................................347 Q.6.1 Specificationofallowablespacingofsupports...............................................................................347 Q.7 Conversionoftheallowablelengths...................................................................................................348 Q.7.1 Othersupportconditions.......................................................................................................................348 Q.7.2 Otherparameters......................................................................................................................................348 Q.8 Additionalsingleloads............................................................................................................................349 Q.8.1 General..........................................................................................................................................................349 Q.9 ExplanatorynoteonFigureQ.2............................................................................................................352 Q.9.1 General..........................................................................................................................................................352 Q.9.2 RequiredpipeleglengthL1,forf1fromthenomogram...............................................................354 Q.9.3 RequiredpipeleglengthL2,forf2fromthenomogram..............................................................354 

AnnexY(informative)HistoryofEN13480‐3................................................................................................359 Y.1 DifferencesbetweenEN13480‐3:2012andEN13480‐3:2017.................................................359 

AnnexZA(informative)RelationshipbetweenthisEuropeanStandardandtheEssentialRequirementsofEUDirective2014/68/EUaimedtobecovered...........................................361 

Bibliography..............................................................................................................................................................362 

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Europeanforeword

Thisdocument(EN13480‐3:2017)hasbeenpreparedbyTechnicalCommitteeCEN/TC267“Industrialpipingandpipelines”,thesecretariatofwhichisheldbyAFNOR.

This European Standard shall be given the status of a national standard, either by publication of anidentical text orby endorsement, at the latest byDecember2017, and conflictingnational standardsshallbewithdrawnatthelatestbyDecember2017.

Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CEN[and/orCENELEC]shallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.

ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s).

For relationship with EUDirective(s), see informative Annex ZA, which is an integral part of thisdocument.

ThisEuropeanStandardEN13480 formetallic industrialpipingconsistsofeight interdependentandnotdissociablePartswhichare:

Part1:General;

Part2:Materials;

Part3:Designandcalculation;

Part4:Fabricationandinstallation;

Part5:Inspectionandtesting;

Part6:Additionalrequirementsforburiedpiping;

CEN/TR13480‐7,Guidanceontheuseofconformityassessmentprocedures;

Part8:Additionalrequirementsforaluminiumandaluminiumalloypiping.

Although these Parts may be obtained separately, it should be recognised that the Parts are inter‐dependant. As such the manufacture of metallic industrial piping requires the application of all therelevantPartsinorderfortherequirementsoftheStandardtobesatisfactorilyfulfilled.

This European Standard will be maintained by a Maintenance MHD working group whose scope ofworkingislimitedtocorrectionsandinterpretationsrelatedtoEN13480.

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The contact to submit queries can be found at http://www.unm.fr (en13480@unm.fr). A form forsubmittingquestionscanbedownloadedfromthelinktotheMHDwebsite.Aftersubjectexpertshaveagreedananswer, theanswerwillbecommunicatedto thequestioner.CorrectedpageswillbegivenspecificissuenumberandissuedbyCENaccordingtoCENRules.InterpretationsheetswillbepostedonthewebsiteoftheMHD.

This document supersedes EN13480‐3:2012. This new edition incorporates the AmendmentswhichhavebeenapprovedpreviouslybyCENmembers,and thecorrectedpagesup to Issue5withoutanyfurther technical change. Annex Y provides details of significant technical changes between thisEuropeanStandardandthepreviousedition.

Amendments to this new edition may be issued from time to time and then used immediately asalternativestorulescontainedherein.

According to the CEN‐CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,Croatia, Cyprus, CzechRepublic,Denmark,Estonia, Finland, FormerYugoslavRepublic ofMacedonia,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,Netherlands,Norway,Poland,Portugal,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TurkeyandtheUnitedKingdom.

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1 Scope

This Part of this European Standard specifies the design and calculation of industrialmetallic pipingsystems,includingsupports,coveredbyEN13480.

2 Normativereferences

The following documents, inwhole or in part, are normatively referenced in this document and areindispensable for its application. For dated references, only the edition cited applies. For undatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.

EN1515‐2:2001, Flanges and their joints— Bolting— Part 2: Combination of flange and boltingmaterialsforsteelflangesPNdesignated

EN1515‐3:2005,Flangesand their joints—Bolting—Part3:Classificationofboltmaterials for steelflanges,Classdesignated

EN1515‐4:2010,Flangesandtheirjoints—Bolting—Part4:SelectionofboltingforequipmentsubjecttothePressureEquipmentDirective97/23/EC

EN 1591‐1:2013, Flanges and their joints— Design rules for gasketed circular flange connections—Part1:Calculationmethod

EN1591‐2:2008, Flanges and their joints— Design rules for gasketed circular flange connections—Part2:Gasketparameters

EN1993(allparts),Eurocode3:Designofsteelstructures

EN10204:2004,Metallicproducts—Typesofinspectiondocuments

EN10216‐2:2013,Seamlesssteeltubesforpressurepurposes—Technicaldeliveryconditions—Part2:Non‐alloyandalloysteeltubeswithspecifiedelevatedtemperatureproperties

EN13445‐3:2014,Unfiredpressurevessels—Part3:Design

EN13480‐1:2017,Metallicindustrialpiping—Part1:General

EN13480‐2:2017,Metallicindustrialpiping—Part2:Materials

EN13480‐4:2017,Metallicindustrialpiping—Part4:Fabricationandinstallation

EN13480‐5:2017,Metallicindustrialpiping—Part5:Inspectionandtesting

ENISO5817:2007,Welding— Fusion‐welded joints in steel, nickel, titanium and their alloys (beamweldingexcluded)—Qualitylevelsforimperfections(ISO5817:2003,correctedversion:2005,includingTechnicalCorrigendum1:2006)

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