EN 12516-2:2014+A1:2021

SLOVENSKI STANDARD
01-december-2021
Industrijski ventili - Trdnost ohišja - 2. del: Metoda za izračun ohišij jeklenih
ventilov
Industrial valves - Shell design strength - Part 2: Calculation method for steel valve shells
Industriearmaturen - Gehäusefestigkeit - Teil 2: Berechnungsverfahren für
drucktragende Gehäuse von Armaturen aus Stahl
Robinetterie industrielle - Résistance mécanique des enveloppes - Partie 2 : Méthode de
calcul relative aux enveloppes d'appareils de robinetterie en acier
Ta slovenski standard je istoveten z: EN 12516-2:2014+A1:2021
ICS:
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12516-2:2014+A1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2021
EUROPÄISCHE NORM
ICS 23.060.01 Supersedes EN 12516-2:2014
English Version
Industrial valves - Shell design strength - Part 2:
Calculation method for steel valve shells
Robinetterie industrielle - Résistance mécanique des Industriearmaturen - Gehäusefestigkeit - Teil 2:
enveloppes - Partie 2 : Méthode de calcul relative aux Berechnungsverfahren für drucktragende Gehäuse von
enveloppes d'appareils de robinetterie en acier Armaturen aus Stahl
This European Standard was approved by CEN on 9 August 2014 and includes Amendment 1 approved by CEN on 6 September
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
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Centre has the same status as the official versions.

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COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

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© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12516-2:2014+A1:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 7
2 Normative references . 7
3 Symbols and units . 7
4 General conditions for strength calculation . 13
5 Design pressure . 14
6 Nominal design stresses for pressure parts other than bolts . 14
6.1 General . 14
6.2 Steels and cast steels other than defined in 6.3, 6.4 or 6.5. 15
6.3 !Austenitic steel and austenitic cast steel with a minimum rupture elongation > 30
%" . 16
6.4 !Austenitic steel and austenitic cast steel with a minimum rupture elongation > 35
%" . 16
6.5 Ferritic and martensitic cast steel . 16
6.6 Creep conditions . 16
7 Calculation methods for the wall thickness of valve bodies . 16
7.1 General . 16
7.2 Wall thickness of bodies and branches outside crotch area . 17
7.2.1 General . 17
7.2.2 Cylindrical bodies or branches . 17
7.2.3 Spherical bodies or branches . 18
7.2.4 Conical bodies or branches . 18
7.2.5 Bodies or branches with oval or rectangular cross-sections . 20
7.3 Wall thickness in the crotch area . 27
7.4 Examples of pressure-loaded areas Ap and metallic cross-sectional areas Af . 28
7.4.1 General . 28
7.4.2 Cylindrical valve bodies . 29
7.4.3 Spherical valve bodies . 31
7.4.4 Oval and rectangular cross-sections . 32
7.4.5 Details . 33
8 Calculation methods for bonnets and covers . 36
8.1 General . 36
8.2 Covers made of flat plates . 36
8.2.1 General . 36
8.2.2 Circular cover without opening, with . 41
8.2.3 Circular covers with concentric circular opening, with . 42
8.2.4 Non-circular covers (elliptical or rectangular) . 43
8.2.5 Special covers made of flat circular plates for specific load and clamping conditions . 44
8.3 Covers consisting of a spherically domed end and an adjoining flanged ring . 59
8.3.1 General . 59
8.3.2 Wall thickness and strength calculation of the spherical segment . 60
8.3.3 Calculation of the flanged ring. 61
8.3.4 Reinforcement of the stuffing box area . 63
8.4 Dished heads . 63
8.4.1 General remarks . 63
8.4.2 Solid dished heads . 64
8.4.3 Dished heads with opening . 65
8.4.4 Allowances on the wall thickness . 67
9 Calculation method for pressure sealed bonnets and covers. 68
10 Calculation methods for flanges . 70
10.1 General . 70
10.2 Circular flanges . 70
10.2.1 General . 70
10.2.2 Flanges with tapered neck . 71
10.2.3 Flanges greater than DN 1 000. 73
10.2.4 Welding neck with tapered neck according to Figure 48 . 74
10.2.5 Weld-on flanges . 75
10.2.6 Reverse flanges . 78
10.2.7 Loose flanges . 78
10.3 Oval flanges . 80
10.3.1 Oval flanges in accordance with Figure 54 . 80
10.3.2 Oval flanges in accordance with Figure 55 . 82
10.4 Rectangular or square flanges . 84
10.4.1 Rectangular or square flanges in accordance with Figure 57 . 84
10.4.2 Rectangular slip-on flanges in accordance with Figure 58 . 85
10.5 Calculation of the bolt diameter . 86
10.5.1 Design temperature . 86
10.5.2 Diameter of the nominal tensile stress . 86
10.5.3 Load cases . 86

10.5.4 Safety factors and allowances . 87
11 Calculation methods for glands . 87
11.1 Loads . 87
11.2 Gland bolts . 88
11.3 Gland flanges . 88
11.4 Other components . 88
12 Fatigue . 88
13 Marking .
...