1、BSI Standards PublicationMetal industrial pipingPart 3: Design and calculationBS EN 13480-3:2012Incorporating corrigendum March 2016National forewordThis British Standard is the UK implementation of EN 13480-3:2012. It supersedes BS EN 13480-3:2002+A4:2010 which is withdrawn.The UK participation in
2、its preparation was entrusted to Technical Committee PVE/10, Piping systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct
3、 application. The British Standards Institution 2016 Published by BSI Standards Limited 2016 ISBN 978 0 580 92908 3 ICS 23.040.01Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strate
4、gy Committee on 31 August 2012.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 13480-3:201231 March 2016 Implementation of CEN/CENELEC Correction Notice27 August 2014: Pages 10, 140 263, 406 and 407correctedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13
5、480-3 June 2012 ICS 23.040.01 Supersedes EN 13480-3:2002English Version Metallic industrial piping - Part 3: Design and calculation Tuyauteries industrielles mtalliques - Partie 3: Conception et calcul Metallische industrielle Rohrleitungen - Teil 3: Konstruktion und Berechnung This European Standar
6、d was approved by CEN on 8 May 2012. 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 na
7、tional 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 lan
8、guage 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, La
9、tvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1
10、000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13480-3:2012: EEN 13480-3:2012 (E) Issue 3 (2014-08) 2 Contents PageForeword 9 1 Scope 11 2 Normative references 11 3 Terms, definitions, symbols and units 12 3.1 Te
11、rms and definitions .12 3.2 Symbols and units .12 4 Basic design criteria 14 4.1 General 14 4.2 Loadings .14 4.2.1 General 14 4.2.2 Combination of loads 15 4.2.3 Loads for dimensioning 15 4.2.4 Other loads to be taken into account 16 4.2.5 Design conditions 18 4.3 Thickness .20 4.4 Tolerances 22 4.5
12、 Joint coefficient .22 4.6 Dimensioning of piping components subject to pressure 22 5 Design stresses .23 5.1 General 23 5.2 Time-independent nominal design stress .23 5.2.1 Steels other than austenitic steels .23 5.2.2 Austenitic steels 23 5.2.3 Nickel and / or chromium alloy steels .24 5.2.4 Steel
13、s castings .24 5.2.5 Additional requirements for steels with no specific control .24 5.3 Time-dependent nominal design stress 25 5.3.1 General 25 5.3.2 Steels 25 5.3.3 Nickel and/or chromium alloy steels .26 6 Design of piping components under internal pressure .26 6.1 Straight pipes .26 6.2 Pipe be
14、nds and elbows .27 6.2.1 General 27 6.2.2 Symbols 27 6.2.3 Required wall thicknesses 27 6.3 Mitre bends .29 6.3.1 General 29 6.3.2 Symbols 29 6.3.3 Effective radius of mitre bend 30 6.3.4 Multiple mitre bends 31 6.3.5 Single mitre bends .31 6.3.6 Adjacent straight pipe sections of mitre bends .31 6.
15、4 Reducers .31 6.4.1 Conditions of applicability 31 6.4.2 Specific definitions 32 6.4.3 Specific symbols and abbreviations32 6.4.4 Conical shells .33 BS EN 13480-3:2012EN 13480-3:2012 (E) Issue 3 (2014-08) 3 6.4.5 Junctions - general 34 6.4.6 Junction between the large end of a cone and a cylinder w
16、ithout a knuckle . 34 6.4.7 Junction between the large end of a cone and a cylinder with a knuckle . 37 6.4.8 Junction between the small end of a cone and a cylinder 38 6.4.9 Offset reducers 40 6.4.10 Special forged reducers 40 6.5 Flexible piping components . 41 6.5.1 General . 41 6.5.2 Expansion j
17、oints 41 6.5.3 Corrugated metal hose assemblies . 42 6.6 Bolted flange connections 44 6.6.1 General . 44 6.6.2 Symbols 44 6.6.3 Standard flange . 44 6.6.4 Non-standard flange 45 7 Design of ends under internal pressure . 45 7.1 Dished ends . 45 7.1.1 Symbols 45 7.1.2 Hemispherical ends . 46 7.1.3 To
18、rispherical ends . 46 7.1.4 Ellipsoidal ends . 48 7.1.5 Calculation of 49 7.2 Circular flat ends . 52 7.2.1 General . 52 7.2.2 Symbols 52 7.2.3 Unstayed flat circular ends welded to cylindrical shells/pipes 54 7.2.4 Unstayed flat circular bolted ends . 61 7.2.5 Reinforcements of openings in unstayed
19、 flat ends . 67 8 Openings and branch connections . 69 8.1 General . 69 8.2 Symbols 70 8.3 Limitations . 71 8.3.1 Thickness ratio 71 8.3.2 Openings in the vicinity of discontinuities . 72 8.3.3 Types of reinforcement . 74 8.3.4 Calculation method . 75 8.3.5 Elliptical openings and oblique branch con
20、nections 75 8.3.6 Reinforcing pads . 77 8.3.7 Dissimilar material of shell and reinforcements 77 8.3.8 Extruded outlets 77 8.3.9 Branches in bends or elbows 77 8.3.10 Screwed-in branches 77 8.4 Isolated openings 78 8.4.1 General . 78 8.4.2 Unreinforced openings . 81 8.4.3 Reinforced openings with di
21、/DiA 30 % 4,2;5,1minm,0p1 RRft(5.2.2-2) for A 1,7: cco12 pzfpzfDe (6.1-3) or 1cci2 pzfpzfDe (6.1-4) NOTE This is Lames equation. BS EN 13480-3:2012EN 13480-3:2012 (E) Issue 3 (2014-08) 27 6.2 Pipe bends and elbows 6.2.1 General There are two methods for calculating the wall thickness of elbows (see
22、6.2.3.1 and Annex B) and three methods for the wall thickness of pipe bends (see 6.2.3.1, 6.2.3.2 and Annex B). The chosen method shall be used in its entirety. The equations given in 6.2.3 shall be applicable only if the out-of-roundness of the pipes bends are within the tolerances given in EN 1348
23、0-4. NOTE These calculation rules take into account 1 and 2 that upon applying internal pressure to a pipe bend, higher stresses occur on the intrados of the bend (and lower stresses on the extrados of the bend) than on a straight pipe with identical wall thickness. 6.2.2 Symbols For the purposes of
24、 6.2, the symbols given in Table 6.2.2-1 shall apply in addition to those given in Table 3.2-1. Table 6.2.2-1 Additional symbols for the purposes of 6.2 Symbol Description Unit eintminimum required thickness without allowances and tolerances for a bend on the intrados mm eextminimum required thickne
25、ss without allowances and tolerances for a bend on the extrados mm R radius of bend or elbow mm r mean radius of the pipe mm 6.2.3 Required wall thicknesses 6.2.3.1 Normal route The minimum required wall thickness without allowances and tolerances shall be calculated by: on the intrados 5,0)/(25,0)/
26、(oointDRDRee (6.2.3-1) on the extrados 5,0)/(25,0)/(ooextDRDRee (6.2.3-2) where e is calculated in accordance with 6.1 for straight pipe. 6.2.3.2 Alternative route Pipes to be bent, by any manufacturing process, shall have a sufficient thickness such that it can be demonstrated that the following re
27、quirements are met after bending. BS EN 13480-3:2012EN 13480-3:2012 (E) Issue 3 (2014-08) 28 a) The minimum thickness at any point in a pipe bend (including the extrados) shall be not less than that required for the equivalent straight pipe. b) Where the design stress is time-dependent, and the bend
28、 radius is less than six times the outside diameter of the pipe, the intrados thickness shall be not less than that calculated from the following equation: rRrRee222int (6.2.3-3) where 20eDr (6.2.3-4) c) Where the design stress is time-independent, and the bend radius is less than three times the ou
29、tside diameter, the intrados thickness shall be not less than that calculated from the following equation: rRrReee22225,1;maxint(6.2.3-5) where r is calculated in accordance with equation (6.2.3-4). NOTE Manufacturing processes and experience should be taken into account for the determination of the
30、 thickness before bending. Table 6.2.3-1 gives guidance on the pipe wall thickness needed to meet the requirements of 6.2.3.2. 6.2.3.3 More accurate route The more accurate method of calculating the wall thickness of pipe bends and elbows shall be in accordance with Annex B. Table 6.2.3-1 Minimum pipe wall thickness before bending by induction Radius Normal route 6.2.3.1 Alternative route 6.2.3.2 10 Do1,02 e 1,04 e 8 Do1,03 e 1,05 e 6 Do1,04 e 1,06 e 5 Do1,04 e 1,08 e 4 Do1,05 e 1,10 e 3 Do1,06 e 1,13 e 2,5 Do1,08 e 1,16 e 2 Do1,10 e 1,20 e 1,5 Do1,15 e 1,25 e BS EN 13480-3:2012
