SIST EN 13445-3:2021
(Main)Unfired pressure vessels - Part 3: Design
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
Relations
Standards Content (Sample)
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.
---------------------- Page: 1 ----------------------SIST EN 13445-3:2021
---------------------- Page: 2 ----------------------
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: ConceptionThis 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.---------------------- Page: 3 ----------------------
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
---------------------- Page: 4 ----------------------SIST EN 13445-3:2021
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
---------------------- Page: 5 ----------------------SIST EN 13445-3:2021
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
---------------------- Page: 6 ----------------------SIST EN 13445-3:2021
EN 13445-3:2021 (E)
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 ....
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.