Irish StandardI.S. EN 13480-3:2017&A2:2020

Metallic industrial piping - Part 3: Design and calculation

© CEN 2020 No copying without NSAI permission except as permitted by copyright law.

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I.S. EN 13480-3:2017& A2:2020I.S. EN 13480-3:2017& A2:2020

Incorporating amendments/corrigenda/National Annexes issued since publication:

EN 13480-3:2017/A2:2020

The National Standards Authority of Ireland (NSAI) produces the following categories of formal documents:

I.S. xxx: Irish Standard — national specification based on the consensus of an expert panel and subject to public consultation.

S.R. xxx: Standard Recommendation — recommendation based on the consensus of an expert panel and subject to public consultation.

SWiFT xxx: A rapidly developed recommendatory document based on the consensus of the participants of an NSAI workshop.

This document replaces/revises/consolidates the NSAI adoption of the document(s) indicated on theCEN/CENELEC cover/Foreword and the following National document(s):

NOTE: The date of any NSAI previous adoption may not match the date of its original CEN/CENELECdocument.

This document is based on:

EN 13480-3:2017

Published:

2017-06-28

This document was publishedunder the authority of the NSAIand comes into effect on:

2020-09-18

ICS number:

23.040.01

NOTE: If blank see CEN/CENELEC cover page

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Údarás um Chaighdeáin Náisiúnta na hÉireann

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National ForewordNational Foreword

I.S. EN 13480-3:2017&A2:2020 is the adopted Irish version of the European Document EN 13480-3:2017,Metallic industrial piping - Part 3: Design and calculation

This document does not purport to include all the necessary provisions of a contract. Users are responsiblefor its correct application.

For relationships with other publications refer to the NSAI web store.

Compliance with this document does not of itse lf confer immunity from legal obligations .Compliance with this document does not of itse lf confer immunity from legal obligations .

In line with international standards practice the decimal point is shown as a comma (,) throughout thisdocument.

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EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN 13480-3:2017/A2 August 2020

ICS 23.040.01 English Version Metallic industrial piping - Part 3: Design and calculationTuyauteries industrielles métalliques - Partie 3 : Conception et calcul Metallische industrielle Rohrleitungen - Teil 3: Konstruktion und Berechnung

This amendment A2 modifies the European Standard EN 13480-3:2017; it was approved by CEN on 12 July 2020. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment into the relevant 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 amendment 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13480-3:2017/A2:2020 E

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Contents Page

European foreword ....................................................................................................................................................... 4

1 Modification to 3.2, "Symbols and units" ................................................................................................. 5

2 Modification to 4.2, "Loadings"................................................................................................................... 5

3 Modification to 4.3, "Thickness" ................................................................................................................. 5

4 Modification to 12.2.4.2, "Overstrained behaviour" ............................................................................ 6

5 Modification to 12.2.10.3, "Basic assumptions and requirements" ................................................ 6

6 Modification to 12.3, "Flexibility analysis" ............................................................................................. 6

7 Modification to 12.3.2, "Stress due to sustained loads" ...................................................................... 8

8 Modification to 12.3.3, "Stress due to sustained and occasional or exceptional loads" ........... 9

9 Modification to 12.3.4, "Stress range due to thermal expansion and alternating loads" .... 11

10 Modification to 12.3.5, "Additional conditions for the creep range" ........................................... 13

11 Modification to 12.3.6, "Stresses due to a single non-repeated support movement" ............. 13

12 Modification to 12.3.7, "Determination of resultant moments" ................................................... 14

13 Modification to 12.3.8, "Alternative method for stress calculation" ........................................... 16

14 Modification to 13.1.1, "General" ............................................................................................................ 16

15 Modification to 13.1.3.12, .......................................................................................................................... 17

16 Modification to 13.1.3.13, "Pipe support manufacturer" ................................................................ 17

17 Modification to 13.1.3.14, "Main structure designer" ...................................................................... 17

18 Modification to 13.1.3.16, "Occasional load" ...................................................................................... 17

19 Modification to 13.2.1, "General" ............................................................................................................ 17

20 Modification to 13.2.2, "Detail design of pipe supports" ................................................................. 17

21 Modification to 13.3.6, "Identification Marking/Name plate" ...................................................... 18

22 Modification to 13.5, "Rigid struts" ........................................................................................................ 18

23 Modification to 13.6, "Shock arrestors, shock absorbers (snubbers)" ........................................ 18

24 Modification to 13.11, "Manufacturing of pipe supports" .............................................................. 18

25 Modification to 13.11.2.1, "General" ...................................................................................................... 18

26 Modification to 13.11.4, "Determination of component sizes" ...................................................... 18

27 Modification to 13.11.4.2, "Stress levels" ............................................................................................. 18

28 Modification to 13.11.4.3, "Allowable stress" ..................................................................................... 19

29 Modification to 13.11.5.4, "Fillet welds" ............................................................................................... 19

30 Modification to 13.11.6.1, "Threaded connections" .......................................................................... 20

31 Modification to 13.11.9, "Design details for shock arrestors (shock absorbers, snubbers)" ....................................................................................................................................................... 20

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32 Modification to Annex H, “Flexibility characteristics, flexibility and stress intensification factors and section moduli of piping components and geometrical discontinuities" .............................................................................................................................................. 20

33 Modification to Annex J, "Type testing of support components" ................................................... 32

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European foreword

This document (EN 13480-3:2017/A2:2020) has been prepared by Technical Committee CEN/TC 267 “Industrial piping and pipelines”, the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2021, and conflicting national standards shall be withdrawn at the latest by February 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a standardization request given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of EN 13480-3:2017.

This document includes the text of the amendment itself. The amended/corrected pages of EN 13480-3:2017 will be published as Issue 4 of the European Standard.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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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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