1、January 2015 Translation by DIN-Sprachendienst.English price group 31No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 23.060.01!%?DZ“2283355www.din.deDDIN EN 12516-2Industrial valves Shell design strength Part 2: Calculation method for steel valve shells;English version EN 12516-2:2014,English translation of DIN EN 12516-2:2015-01Industriearmaturen Gehusefestigkeit Teil 2: Berechnungsverfahren fr drucktragende Ge
3、huse von Armaturen aus Stahl;Englische Fassung EN 12516-2:2014,Englische bersetzung von DIN EN 12516-2:2015-01Robinetterie industrielle Rsistance mcanique des enveloppes Partie 2: Mthode de calcul relative aux enveloppes dappareils de robinetterie en acier;Version anglaise EN 12516-2:2014,Traduction
4、 anglaise de DIN EN 12516-2:2015-01SupersedesDIN EN 12516-2:2004-10www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 103 pages 12.14 DIN EN 12516-2:2015-01 2 A comma is used as the decimal marker. National foreword This document (EN 12516
5、-2:2014) has been prepared by Technical Committee CEN/TC 69 “Industrial valves” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the DIN-Normenausschuss Armaturen (DIN Standards Committee Valves), Working Committee NA 003-01-01 AA Grundnormen. Amendments This
6、 standard differs from DIN EN 12516-2:2004-10 as follows: a) normative references have been updated; b) formulae and figures have been renumbered; the former Subclause 10.6 “Design temperature” is now Subclause 10.5 “Calculation of the bolt diameter”; c) some formulae have been changed: 1) Formulae
7、(3) to (6) for calculation of the wall thickness have been added; 2) Formulae (9) and (10) for the calculation of ecin case of do/di 1,7 have been added; 3) Formulae (17) and (20) for conical bodies or branches have been added; d) the figures have been changed and/or updated: 1) a new Figure 1 “Comp
8、osition of section thickness and tolerance allowances” has been added; 2) Figure 2 “Cone calculation coefficient” has been revised; 3) the former Figures 6a and 6b have been combined in Figure 7 “Calculation coefficient, Bn, for rectangular cross-sections”; 4) Figures 23, 24 and 25 used to establish
9、 the calculation coefficients Cy, Czand Cxhave been trans-ferred to Subclause 8.2.1; 5) Figure 46 “Types of flange connections” has been added; e) tables have been updated: 1) Table 1 “Symbols, characteristics and units” has been revised; 2) in Table 2 “Nominal design stresses (allowable stresses)”,
10、 a new column “Test conditions” has been added; 3) Table 5 “Flat circular plates and annular plates Bending moments as a function of load cases and clamping conditions” has been revised; 4) Table 7 “Lever arms of the forces in the moment formulae” has been revised; DIN EN 12516-2:2015-01 3 f) Clause
11、 6 “Nominal design stresses for pressure parts other than bolts” now contains references to PED 97/23/EC; g) Clause 7 “Calculation methods for the wall thickness of valve bodies” has been restructured; and Subclause 7.1 now contains information on calculation of the surface-comparison; h) Subclauses
12、 8.2.2 and 8.2.3 now differentiates between “direct loading” and “not subjected to direct loading”; and Subclause 8.2.3 now contains a warning regarding the mean support diameter dmA; i) Subclause 8.3.3.5 regarding the diameter of centre of gravity has been added; j) Clause 10 “Calculation methods f
13、or flanges” has been revised; k) the former informative Annex A “Allowable stresses” has been deleted; l) the present Annex A “Characteristic values of gaskets and joints” has been revised; m) Annex ZA has been revised. Previous editions DIN 3840: 1982-09 DIN EN 12516-2: 2004-10 DIN EN 12516-2:2015-
14、01 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12516-2 October 2014 ICS 23.060.01 Supersedes EN 12516-2:2004English Version Industrial valves - Shell design strength - Part 2: Calculation method for steel valve shells Robinetterie industrielle - Rsistance
15、mcanique des enveloppes - Partie 2 : Mthode de calcul relative aux enveloppes dappareils de robinetterie en acier Industriearmaturen - Gehusefestigkeit - Teil 2: Berechnungsverfahren fr drucktragende Gehuse von Armaturen aus Stahl This European Standard was approved by CEN on 9 August 2014. CEN memb
16、ers 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 applicati
17、on 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 Managem
18、ent 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
19、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 CEN-CENELEC Management Centre: Avenue Marnix 1
20、7, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12516-2:2014 EEN 12516-2:2014 (E) 2 Contents Page Foreword 4 1 Scope 7 2 Normative references 7 3 Symbols and units .7 4 General conditions for strength calcul
21、ation 12 5 Design pressure 13 6 Nominal design stresses for pressure parts other than bolts . 13 6.1 General . 13 6.2 Steels and cast steels other than defined in 6.3, 6.4 or 6.5 14 6.3 Austenitic steel and austenitic cast steel with a minimum rupture elongation not less than 30 % 14 6.4 Austenitic
22、steel and austenitic cast steel with a minimum rupture elongation not less than 35 % 15 6.5 Ferritic and martensitic cast steel. 15 6.6 Creep conditions. 15 7 Calculation methods for the wall thickness of valve bodies . 15 7.1 General . 15 7.2 Wall thickness of bodies and branches outside crotch are
23、a . 16 7.2.1 General . 16 7.2.2 Cylindrical bodies or branches . 16 7.2.3 Spherical bodies or branches . 17 7.2.4 Conical bodies or branches . 17 7.2.5 Bodies or branches with oval or rectangular cross-sections 19 7.3 Wall thickness in the crotch area 26 7.4 Examples of pressure-loaded areas Apand m
24、etallic cross-sectional areas Af27 7.4.1 General . 27 7.4.2 Cylindrical valve bodies . 28 7.4.3 Spherical valve bodies . 30 7.4.4 Oval and rectangular cross-sections . 31 7.4.5 Details 32 8 Calculation methods for bonnets and covers . 35 8.1 General . 35 8.2 Covers made of flat plates . 35 8.2.1 Gen
25、eral . 35 8.2.2 Circular cover without opening, with 40 8.2.3 Circular covers with concentric circular opening, with 41 8.2.4 Non-circular covers (elliptical or rectangular) . 42 8.2.5 Special covers made of flat circular plates for specific load and clamping conditions . 43 8.3 Covers consisting of
26、 a spherically domed end and an adjoining flanged ring . 55 8.3.1 General . 55 8.3.2 Wall thickness and strength calculation of the spherical segment 56 8.3.3 Calculation of the flanged ring 57 8.3.4 Reinforcement of the stuffing box area 59 8.4 Dished heads . 59 8.4.1 General remarks 59 8.4.2 Solid
27、 dished heads . 60 8.4.3 Dished heads with opening . 61 8.4.4 Allowances on the wall thickness . 63 DIN EN 12516-2:2015-01EN 12516-2:2014 (E)3 9 Calculation method for pressure sealed bonnets and covers 64 10 Calculation methods for flanges 66 10.1 General 66 10.2 Circular flanges 66 10.2.1 General
28、66 10.2.2 Flanges with tapered neck 67 10.2.3 Flanges greater than DN 1 000 . 69 10.2.4 Welding neck with tapered neck according to Figure 48 70 10.2.5 Weld-on flanges . 71 10.2.6 Reverse flanges . 74 10.2.7 Loose flanges . 74 10.3 Oval flanges . 76 10.3.1 Oval flanges in accordance with Figure 54 .
29、 76 10.3.2 Oval flanges in accordance with Figure 55 . 78 10.4 Rectangular or square flanges . 80 10.4.1 Rectangular or square flanges in accordance with Figure 57 80 10.4.2 Rectangular slip-on flanges in accordance with Figure 58 . 80 10.5 Calculation of the bolt diameter . 81 10.5.1 Design tempera
30、ture . 81 10.5.2 Diameter of the nominal tensile stress 81 10.5.3 Load cases . 82 10.5.4 Safety factors and allowances . 82 11 Calculation methods for glands . 82 11.1 Loads 82 11.2 Gland bolts . 83 11.3 Gland flanges . 83 11.4 Other components . 83 12 Fatigue 83 13 Marking . 83 Annex A (informative
31、) Characteristic values of gaskets and joints . 84 Annex B (informative) Calculation procedure 96 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC . 98 Bibliography 99 DIN EN 12516-2:2015-01EN 12516-2:2014 (E)4 Foreword This d
32、ocument (EN 12516-2:2014) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2
33、015, and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights
34、. This document supersedes EN 12516-2:2004. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 97/23/EC (Pressure Equipment Directive). For relationship with EU Directive
35、 97/23/EC (Pressure Equipment Directive), see informative Annex ZA, which is an integral part of this document. In comparison with the previous version, the following significant changes have been made: a) the normative references were updated; b) all formulae and figures have been renumbered; in pa
36、rticular 10.6 “Design temperature” became 10.5 “Calculation of the bolt diameter”; c) some formulae were changed: 1) Formulae (3) to (6) for calculated wall thickness have been added; 2) Formulae (9) and (10) for calculation of ecin case of do/ di 1,7 have been added; 3) Formulae (17) and (20) for c
37、onical bodies or branches have been added; d) the figures were changed and/or updated: 1) a new Figure 1 “Composition of section thickness and tolerance allowances” has been added; 2) Figure 2 “Cone calculation coefficient” has been over-worked; 3) former Figures 6a and 6b are now combined in Figure
38、 7 “Calculation coefficient Bnfor rectangular cross-sections”; 4) Figures 23, 24, and 25 used to establish the calculation coefficients Cx, Cyand Czwere moved to 8.2.1; 5) the new Figure 46 “Types of flange connections” has been added; e) tables were updated: 1) Table 1 giving the symbols characteri
39、stics and units has been revised; 2) a column for test conditions in Table 2 “Nominal design stresses (allowable stresses)” has been added; DIN EN 12516-2:2015-01EN 12516-2:2014 (E) 5 3) Table 5 “Flat circular plates and annular plates Bending moments as a function of load cases and clamping conditi
40、ons” has been revised; 4) Table 7 “Lever arms of the forces in the moment formulae” has been revised; f) Clause 6 “Nominal design stresses for pressure parts other than bolts” now contains references to PED 97/23/EC; g) Clause 7 “Calculation methods for the wall thickness of valve bodies” has been r
41、estructured; and 7.1 now contains information on calculation of the surface-comparison; h) Subclauses 8.2.2 and 8.2.3 now draw a distinction between “direct loading” and “not subjected to direct loading”; and 8.2.3 now contains a warning regarding the mean support diameter dmA; i) there is a new Sub
42、clause 8.3.3.5 regarding the diameter of centre of gravity; j) Clause 10 “Calculation methods for flanges” has been over-worked; k) the former informative Annex A “Allowable stresses” has been deleted; l) the Annex “Characteristic values of gaskets and joints” has been over-worked; m) Annex ZA has b
43、een updated. EN 12516, Industrial valves Shell design strength, consists of four parts: Part 1: Tabulation method for steel valve shells; Part 2: Calculation method for steel valve shells (the present document); Part 3: Experimental method; Part 4: Calculation method for valve shells manufactured in
44、 metallic materials other than steel. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugos
45、lav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12516-2:2015-01EN 12516-2:2014 (E) 6 Intro
46、duction EN 12516, Industrial valves Shell design strength, is composed of four parts. EN 12516-1 and EN 12516-2 specify methods for determining the thickness of steel valve shells by tabulation and calculation methods respectively. EN 12516-3 establishes an experimental method for assessing the stre
47、ngth of valve shells in steel, cast iron and copper alloy by applying an elevated hydrostatic pressure at ambient temperature. EN 12516-4 specifies methods for calculating the thickness for valve shells in metallic materials other than steel. The calculation method, EN 12516-2, is similar in approac
48、h to the former DIN 3840 where the designer is required to calculate the wall thickness for each point on the pressure temperature curve using the allowable stress at that temperature for the material he has chosen (see Bibliography, reference 1). The allowable stress is calculated from the material properties using safety factors that are defined in EN 12516-2. The formulae in EN 12516-2 consider the valve as a pressure vessel and ensure that there will be no excessive deformation or plastic instability. The tabulation
