Unfired pressure vessels - Part 3: Design

This Part of this document specifies requirements for the design of unfired pressure vessels covered by EN 13445-1:2019 and constructed of steels in accordance with EN 13445-2:2019.
EN 13445-5:2019, Annex C specifies requirements for the design of access and inspection openings, closing mechanisms and special locking elements.
NOTE This Part applies to design of vessels before putting into service. It may be used for in service calculation or analysis subject to appropriate adjustment.

Unbefeuerte Druckbehälter - Teil 3: Konstruktion

Dieser Teil 3 der Europäischen Norm legt die Anforderungen an die Konstruktion von unbefeuerten Druckbehältern nach EN 13445-1:2021 und hergestellt aus Stählen nach EN 13445-2:2021 fest.
EN 13445-5:2021 gibt im Anhang C Bedingungen für die Konstruktion von Zugangs- und Besichtigungsöffnungen, von Verschlüssen und besonderen Verschlusselementen.
ANMERKUNG Dieser Teil gilt für Konstruktion und Berechnung von Behältern vor der Inbetriebnahme. Er kann auch, mit entsprechenden Anpassungen, für Berechnungen oder analytische Nachweise im Betrieb verwendet werden.

Récipients sous pression non soumis à la flamme - Partie 3: Conception

Nekurjene tlačne posode - 3. del: Konstruiranje

General Information

Status
Published
Publication Date
19-Aug-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
29-Jun-2021
Due Date
03-Sep-2021
Completion Date
20-Aug-2021

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SLOVENSKI STANDARD
SIST EN 13445-3:2021
01-september-2021
Nadomešča:
SIST EN 13445-3:2014
SIST EN 13445-3:2014/A1:2015
SIST EN 13445-3:2014/A2:2016
SIST EN 13445-3:2014/A3:2018
SIST EN 13445-3:2014/A4:2018
SIST EN 13445-3:2014/A5:2018
SIST EN 13445-3:2014/A6:2019
SIST EN 13445-3:2014/A7:2019
SIST EN 13445-3:2014/A8:2019
Nekurjene tlačne posode - 3. del: Konstruiranje
Unfired pressure vessels - Part 3: Design
Unbefeuerte Druckbehälter - Teil 3: Konstruktion
Récipients sous pression non soumis à la flamme - Partie 3: Conception
Ta slovenski standard je istoveten z: EN 13445-3:2021
ICS:
23.020.32 Tlačne posode Pressure vessels
SIST EN 13445-3:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 13445-3:2021
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SIST EN 13445-3:2021
EN 13445-3
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 23.020.30 Supersedes EN 13445-3:2014
English Version
Unfired pressure vessels - Part 3: Design

Récipients sous pression non soumis à la flamme - Unbefeuerte Druckbehälter - Teil 3: Konstruktion

Partie 3: Conception
This European Standard was approved by CEN on 24 February 2021.

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, 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
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13445-3:2021 E

worldwide for CEN national Members.
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SIST EN 13445-3:2021
EN 13445-3:2021 (E)
Issue 1 (2021-05)
Contents
Page

European foreword ............................................................................................................................................................... 7

1 Scope ............................................................................................................................................................................. 8

2 Normative references ............................................................................................................................................. 8

3 Terms and definitions ............................................................................................................................................ 9

4 Symbols and abbreviations ................................................................................................................................ 12

5 Basic design criteria .............................................................................................................................................. 14

5.1 General ....................................................................................................................................................................... 14

5.2 Corrosion, erosion and protection ................................................................................................................... 14

5.3 Load cases ................................................................................................................................................................. 17

5.4 Design methods ...................................................................................................................................................... 24

5.5 Thickness calculations (DBF) ............................................................................................................................ 26

5.6 Joint coefficient ....................................................................................................................................................... 27

5.7 Design requirements of welded joints ........................................................................................................... 28

6 Maximum allowed values of the nominal design stress for pressure parts ..................................... 31

6.1 General ....................................................................................................................................................................... 31

6.2 Steels (except castings), other than austenitic steels covered by 6.4 and 6.5, with a

minimum rupture elongation, as given in the relevant technical specification for the

material, below 30 % ............................................................................................................................................ 32

6.3 Alternative route for steels (except castings), other than austenitic steels covered by

6.4 and 6.5, with a minimum rupture elongation, as given in the relevant technical

specification for the material, below 30 % ................................................................................................... 32

6.4 Austenitic steels (except castings) with a minimum rupture elongation, A%, as given in

the relevant technical specification for the material, such as 30%≤A%<35% ............................... 33

6.5 Austenitic steels (except castings) with a minimum rupture elongation, A%, as given in

the relevant technical specification for the material, such as A% 35% ........................................... 33

6.6 Cast steels.................................................................................................................................................................. 34

6.7 Nominal design stress of anchor bolting ....................................................................................................... 35

7 Shells under internal pressure ......................................................................................................................... 35

7.1 Purpose ...................................................................................................................................................................... 35

7.2 Specific definitions ................................................................................................................................................ 35

7.3 Specific symbols and abbreviations ................................................................................................................ 36

7.4 Cylindrical and spherical shells ........................................................................................................................ 36

7.5 Dished ends .............................................................................................................................................................. 37

7.6 Cones and conical ends ........................................................................................................................................ 42

7.7 Nozzles which encroach into the knuckle region ....................................................................................... 51

8 Shells under external pressure ......................................................................................................................... 55

8.1 Purpose ...................................................................................................................................................................... 55

8.2 Specific definitions ................................................................................................................................................ 55

8.3 Specific symbols and definitions ...................................................................................................................... 56

8.4 General ....................................................................................................................................................................... 59

8.5 Cylindrical shells .................................................................................................................................................... 60

8.6 Conical shell ............................................................................................................................................................. 80

8.7 Spherical shells ....................................................................................................................................................... 88

8.8 Vessel ends ............................................................................................................................................................... 89

9 Openings in shells .................................................................................................................................................. 89

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EN 13445-3:2021 (E)
Issue 1 (2021-05)

9.1 Purpose ...................................................................................................................................................................... 89

9.2 Specific definitions ................................................................................................................................................ 90

9.3 Specific symbols and abbreviations ................................................................................................................ 91

9.4 General ...................................................................................................................................................................... 94

9.5 Isolated openings ................................................................................................................................................ 105

9.6 Multiple openings ............................................................................................................................................... 123

9.7 Openings close to a shell discontinuity ....................................................................................................... 134

10 Flat ends ................................................................................................................................................................. 142

10.1 Purpose ................................................................................................................................................................... 142

10.2 Specific definitions ............................................................................................................................................. 142

10.3 Specific symbols and abbreviations ............................................................................................................. 143

10.4 Unpierced circular flat ends welded to cylindrical shells .................................................................... 144

10.5 Unpierced bolted circular flat ends .............................................................................................................. 151

10.6 Pierced circular flat ends ................................................................................................................................. 154

10.7 Flat ends of non-circular or annular shape ............................................................................................... 159

11 Flanges .................................................................................................................................................................... 163

11.1 Purpose ................................................................................................................................................................... 163

11.2 Specific definitions ............................................................................................................................................. 163

11.3 Specific symbols and abbreviations ............................................................................................................. 164

11.4 General ................................................................................................................................................................... 166

11.5 Narrow face gasketed flanges ......................................................................................................................... 170

11.6 Full face flanges with soft ring type gaskets .............................................................................................. 186

11.7 Seal welded flanges ............................................................................................................................................ 189

11.8 Reverse narrow face flanges ........................................................................................................................... 189

11.9 Reverse full face flanges ................................................................................................................................... 192

11.10 Full face flanges with metal to metal contact ............................................................................................ 196

12 Bolted domed ends ............................................................................................................................................. 199

12.1 Purpose ................................................................................................................................................................... 199

12.2 Specific definitions ............................................................................................................................................. 199

12.3 Specific symbols and abbreviations ............................................................................................................. 199

12.4 General ................................................................................................................................................................... 199

12.5 Bolted domed ends with narrow face gaskets .......................................................................................... 199

12.6 Bolted domed ends with full face joints...................................................................................................... 201

13 Heat Exchanger Tubesheets ............................................................................................................................ 203

13.1 Purpose ................................................................................................................................................................... 203

13.2 Specific definitions ............................................................................................................................................. 203

13.3 Specific symbols and abbreviations ............................................................................................................. 203

13.4 U-tube tubesheet heat exchangers ............................................................................................................... 206

13.5 Fixed tubesheet heat exchangers .................................................................................................................. 220

13.6 Floating tubesheet heat exchangers ............................................................................................................ 249

13.7 Tubesheet characteristics ............................................................................................................................... 267

13.8 Maximum permissible tube to tubesheet joint stress ........................................................................... 274

13.9 Maximum permissible longitudinal compressive stress for tubes ................................................... 275

13.10 Design of tubesheet flange extension with a narrow face gasket...................................................... 278

13.11 Design of tubesheet flange extension with a full face gasket .............................................................. 282

13.12 Special tube-to-tubesheet welded joints .................................................................................................... 285

14 Expansion bellows .............................................................................................................................................. 289

14.1 Purpose ................................................................................................................................................................... 289

14.2 Specific definitions ............................................................................................................................................. 289

14.3 Specific symbols and abbreviations ............................................................................................................. 291

14.4 Conditions of applicability............................................................................................................................... 293

14.5 U-shaped unreinforced bellows .................................................................................................................... 295

14.6 U-shaped reinforced bellows .......................................................................................................................... 310

14.7 Toroidal bellows ................................................................................................................................................. 319

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EN 13445-3:2021 (E)
Issue 1 (2021-05)

14.8 Fabrication ............................................................................................................................................................ 325

14.9 Inspection and testing ....................................................................................................................................... 327

14.10 Bellows subjected to axial, lateral or angular displacements ............................................................ 329

15 Pressure vessels of rectangular section...................................................................................................... 335

15.1 Purpose ................................................................................................................................................................... 335

15.2 Specific definitions ............................................................................................................................................. 335

15.3 Specific symbols and abbreviations ............................................................................................................. 335

15.4 General .................................................................................................................................................................... 337

15.5 Unreinforced vessels ......................................................................................................................................... 337

15.6 Reinforced vessels .............................................................................................................................................. 346

15.7 Openings ................................................................................................................................................................. 355

16 Additional non-pressure loads....................................................................................................................... 357

16.1 Purpose ................................................................................................................................................................... 357

16.2 Specific definitions ............................................................................................................................................. 357

16.3 Specific symbols and abbreviations ............................................................................................................. 358

16.4 Local loads on nozzles in spherical shells .................................................................................................. 359

16.5 Local loads on nozzles in cylindrical shells ............................................................................................... 370

16.6 Line loads ............................................................................................................................................................... 379

16.7 Lifting lugs ............................................................................................................................................................. 385

16.8 Horizontal vessels on saddle supports ........................................................................................................ 391

16.9 Horizontal vessels on ring supports............................................................................................................. 406

16.10 Vertical vessels on bracket supports ........................................................................................................... 411

16.11 Vertical vessels with supporting legs .......................................................................................................... 416

16.12 Vertical vessels with skirts .............................................................................................................................. 418

16.13 Vertical vessels with ring supports .............................................................................................................. 451

16.14 Global loads on cylindrical shells .................................................................................................................. 462

17 Simplified assessment of fatigue life ............................................................................................................ 474

17.1 Purpose ................................................................................................................................................................... 474

17.2 Specific definitions ............................................................................................................................................. 474

17.3 Specific symbols and abbreviations ............................................................................................................. 477

17.4 Conditions of applicability ............................................................................................................................... 479

17.5 General .................................................................................................................................................................... 480

17.6 Determination of allowable number of pressure and thermal cycles ............................................. 488

17.7 Assessment rule ................................................................................................................................................... 513

17.8 Design and manufacture................................................................................................................................... 513

17.9 Testing..................................................................................................................................................................... 514

18 Detailed assessment of fatigue life ............................................................................................................... 515

18.1 Purpose ................................................................................................................................................................... 515

18.2 Specific definitions ............................................................................................................................................. 515

18.3 Specific symbols and abbreviations ............................................................................................................. 519

18.4 Limitations ............................................................................................................................................................ 521

18.5 General .................................................................................................................................................................... 522

18.6 Welded material .................................................................................................................................................. 525

18.7 Unwelded components and bolts .................................................................................................................. 530

18.8 Elastic-plastic conditions ................................................................................................................................. 534

18.9 Fatigue action ....................................................................................................................................................... 536

18.10 Fatigue strength of welded components .................................................................................................... 540

18.11 Fatigue strength of unwelded components ............................................................................................... 560

18.12 Fatigue strength of steel bolts ........................................................................................................................ 565

19 Creep design .......................................................................................................................................................... 568

19.1 Purpose ................................................................................................................................................................... 568

19.2 Specific definitions ............................................................................................................................................. 568

19.3 Specific symbols and abbreviations ............................................................................................................. 568

19.4 Design in the creep range ................................................................................................................................. 569

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Issue 1 (2021-05)

19.5 Nominal Design stress in the creep range ................................................................................................. 570

19.6 Weld joint factor in the creep range ............................................................................................................ 574

19.7 Pressure loading of predominantly non-cyclic nature in the creep range .................................... 574

19.8 Design procedures for DBF ............................................................................................................................. 574

20 Design rules for reinforced flat walls .......................................................................................................... 578

20.1 General ................................................................................................................................................................... 578

20.2 Stayed flat walls ................................................................................................................................................... 578

20.3 Specific definitions for stayed flat walls ..................................................................................................... 578

20.4 Required thickness of stayed flat walls ...................................................................................................... 578

20.5 Required dimensions and layout of staybolts and stays ...................................................................... 578

20.6 Requirements for threaded staybolts ......................................................................................................... 579

20.7 Requirements for welded-in staybolts and welded stays .................................................................... 579

20.8 Tables for stayed flat walls .............................................................................................................................. 580

20.9 Figures for Stayed Flat Walls .
...

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