Metallicindustrial piping
Part 3:Design and calculation
bsi.
Nationalforeword
supersedes BS EN 13480-3:2012 which is withdrawn. This British Standard is the UK implementation of EN 13480-3:2017. It
The UK participation in its preparation was entrusted to TechnicalCommittee PVE/10 Piping systems.
request to its secretary. A list of organizations represented on this mittee can be obtained on
This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.
The British Standards Institution 2017Published by BSI Standards Limited 2017
ISBN 978 0 580 98618 5
ICS 23.040.01
Compliancewith aBritishStandard cannot conferimmunity fromlegal obligations.
This British Standard was published under the authority of the
Amendments/corrigenda issued since publication
Date
Text affected
EN13480-3
Supersedes EN 13480-3:2012
English Version
Metallicindustrialpiping-Part3:Design and calculation
Tuyauteries industrielles metalliques - Partie 3 :Conception et calcul
Industrielle metallische Rohrleitungen - Teil 3: Konstruktion und Berechnung
This European Standard was approved by CEN on 21 June 2017.
sa u ao suu a aendgs qm suogemag peau aan/ a qn du op pnoq ae saqau n European Standard the status of anational standard without any alteration Up-to-date lists and bibliographical referencesconcerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENmember.
This European Standard exists in three offcial versions (English French German). A verslion in any other language made by translation under the responsibility of a CEN memberinto its own language and notified to the CEN-CENELEC ManagementCentre 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 Fm oslRpulic fMaoni Fraemany ce Hngary and Ieland taly LatviaLithniaTurkey and United Kingdom. Luxembourg Malta Netherlands Norway Poland Portugal Romania Serbia Slovakia Slovenia Spain Sweden Switzerland
CEN-CENELEC Management Centre:Avenue Marnix 17 B-1000 Brussels
Contents
Europeanforeword. 101 Scope... .122 Normative references. .123.1 3 Terms and definitions. Terms definitions symbols and units 13 133.2 Symbols and units... ...134.1 4 Basic design criteria.... General. 15 154.2 Loadings. 154.2.1 4.2.2 Combination of loads. General. 15 164.2.3 Loads for dimensioning. ..16.4.2.4 4.2.5 Other loads to be taken into account. Design conditions.. 18 .194.3 Tolerances. Thickness.... 224.4 4.5 Joint coefficient. 25 254.6 Dimensioning of piping ponents subject to pressure. 265 5.1 Design stresses... Genera.. 26 265.2 Time-independent nominal design stress....... 275.2.1 5.2.2 Steels other than austenitic steels. Austenitic steels. 27 275.2.3 Nickel and / or chromium alloy steels. .285.2.4 5.2.5 Steels casting... Additionalrequirementsforsteelswithno specific contro.l. 28 285.3 Time-dependent nominal design stress . 295.3.1 5.3.2 Genera. Steels. 29 295.3.3 Nickel and/or chromium alloy steels. 306 Design of piping ponents under internal pressure Straight pipes... 306.1 6.2 Pipe bends and elbows... 30 306.2.1 6.2.2 Genera.. Symbols. 30 316.2.3 Required wall thicknesses.. .316.3 6.3.1 Mitre bends... General. 32 326.3.2 Symbols. 326.3.4 Multiple mitre bends. Effectiveradius of mitre bend .336.3.5 Single mitre bends. 34
6.3.6Adjacent straight pipe sections of mitre bends 6.4 Reducers... .346.4.1 Conditions of applicability ...4.6.4.2 6.4.3 Specific definitions. Specific symbols and abbreviations. 35 .356.4.4 Conical shells.. .366.4.5 6.4.6 Junctions -general.. Junction between the large end of a cone and a cylinder without a knuckle. 37 376.4.7 6.4.8 Junction between the large end of a cone and a cylinder with a knuckle. Junctionbetween the small end of a cone and a cylinder. 40 .416.4.9 Offsetreducers. 436.4.10 Specialforged reducers. 6.5 Flexible pipingponents.. .43 .446.5.1 General.6.5.2 6.5.3 Expansion joints. Corrugated metal hose assemblies. 44 466.6 Bolted flange connections. .476.6.1 6.6.2 Symbols. General. .47 476.6.3 Standard flange Non-standard flange. 476.6.4 Design ofends under internal pressure7 7.1 Dished ends.. .48 ..487.1.1 7.1.2 Symbols . Hemispherical ends .48 497.1.3 Torispherical ends. 507.1.5 7.1.4 Calculation of β Ellipsoidal ends. 51 527.2 Circular flat ends. 567.2.1 7.2.2 General. Symbols. 56 567.2.3 Unstayed flat circular ends welded to cylindrical shells/pipes. 587.2.4 7.2.5 Reinforcements of openings in unstayed flat ends Unstayed flat circular bolted ends.. ...718 Openings and branch connections. .748.1 Symbols. General .748.2 8.3 Limitations. .758.3.1 Thickness ratio.. Openings in the vicinity of discontinuities. .758.3.3 8.3.2 Types of reinforcement. .77 .798.3.4 8.3.5 Elliptical openings and obliquebranch connection.. Calculation method.. ...80 ..808.3.6 Reinforcing pads. .828.3.7 8.3.8 Dissimilarmaterial of shell andreinforcements... Extruded outlets... ..82 .828.3.9 Forged tee.. .828.3.11 Screwed-in branches. 8.3.10 Branches in bends or elbows... .83 838.4 Isolated openings.. .848.4.2 8.4.1 Unreinforced openings. General. .84 .87
