1、December 2016 English price group 32No 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).ICS 27.060.30!%/“2599112www.din.deD
2、IN EN 12953-3Shell boilers Part 3: Design and calculation for pressure parts;English version EN 129533:2016,English translation of DIN EN 12953-3:2016-12Growasserraumkessel Teil 3: Konstruktion und Berechnung fr drucktragende Teile;Englische Fassung EN 129533:2016,Englische bersetzung von DIN EN 129
3、53-3:2016-12Chaudires tube de fume Partie 3: Conception et calcul des parties sous pression;Version anglaise EN 129533:2016,Traduction anglaise de DIN EN 12953-3:2016-12SupersedesDIN EN 129533:200208www.beuth.deDocument comprises 111 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the Germ
4、an-language original shall be considered authoritative.12.16 DIN EN 12953-3:2016-12 2 A comma is used as the decimal marker. National foreword This document (EN 12953-3:2016) has been prepared by Technical Committee CEN/TC 269 “Shell and water-tube boilers” (Secretariat: DIN, Germany). The responsib
5、le German body involved in its preparation was DIN-Normenausschuss Rohrleitungen und Dampfkesselanlagen (DIN Standards Committee Piping and Boiler Plant), Working Committee NA 082-00-18 AA Dampfkesselanlagen. For additional information regarding the NARD visit us on the internet at http:/www.din.de/
6、go/nard. Amendments This standard differs from DIN EN 12953-3:2002-08 as follows: a) normative references have been updated; b) Clause 3 “Terms and definitions” has been supplemented; c) Subclause 5.5 dealing with the thermal design of furnace tubes has been revised; d) Clause 6 “Calculation tempera
7、ture and nominal design stress” has been revised; e) Clause 8 covering openings and branches in cylindrical shells has been revised; f) Clause 10 covering supported flat plates, stays and stiffeners has been revised; g) Subclause 12.3.2 “Departure from circularity of the tube bends” has been revised
8、; h) Subclause 12.4 “Smoke tubes” has been revised; i) a normative Annex B dealing with the calculation of the maximum and the middle furnace wall temperature has been added; j) the former Annex ZA regarding the relationship between this European Standard and the Essential Requirements of EU Directi
9、ve 2014/68/EC has been updated; k) the standard has been editorially revised. Previous editions DIN EN 12953-3: 2002-08 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12953-3 May 2016 ICS 27.060.30; 27.100 Supersedes EN 12953-3:2002English Version Shell boilers - Part 3: Design and calculation
10、 for pressure parts Chaudires tubes de fume - Partie 3: Conception et calcul des parties sous pression Growasserraumkessel - Teil 3: Konstruktion und Berechnung fr drucktragende Teile This European Standard was approved by CEN on 23 January 2016. CEN members are bound to comply with the CEN/CENELEC
11、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
12、 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 officia
13、l 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, Lithuania, Luxembourg, Malta, Netherlands, No
14、rway, 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 17, B-1000 Brussels 2016 CEN All rights of exp
15、loitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12953-3:2016 EEN 12953-3:2016 (E) 2 Contents Page European foreword 5 1 Scope . 7 2 Normative references . 7 3 Terms and definitions 7 4 Symbols and abbreviations 8 5 General . 8 5.1 Boilers 8 5.2 Hot-wat
16、er boilers . 8 5.3 Main welds 8 5.4 Weld factor . 9 5.5 Thermal design of furnaces tubes 9 5.5.1 Design conditions . 9 5.5.2 Furnace dimensions . 11 5.5.3 Heat input 11 5.5.4 Additional operating conditions 12 5.6 Dimensions of pressure parts . 12 5.7 Determination of pressures 12 5.7.1 Maximum allo
17、wable pressure 12 5.7.2 Calculation pressure 12 5.7.3 Safety valves set pressure 12 5.7.4 Hydrostatic test pressure . 13 5.8 Allowances . 13 5.8.1 Allowance for material supply tolerances and forming processes . 13 5.8.2 Allowance for metal wastage 13 5.9 Additional material requirements for plates
18、13 5.10 Standardized fittings 14 5.11 Flanges 14 5.12 Design by analysis . 14 5.13 Economizer and superheater 14 6 Calculation temperature and nominal design stress . 14 6.1 Calculation temperature 14 6.2 Nominal design stress 15 7 Cylindrical shells . 15 7.1 Shell thickness 15 7.1.1 Requirements .
19、15 7.1.2 Required wall thickness including allowances 16 7.2 Basic calculation subjected to internal pressure 16 7.3 Boiler supports and lifting lugs 16 8 Openings and branches in cylindrical shells . 16 8.1 General 16 8.1.1 Introduction 16 8.1.2 Requirements for the reinforcement of openings in she
20、lls . 16 8.1.3 Effective lengths lrsfor calculation of efficiencies and of compensations. 18 8.1.4 Condition of isolated openings . 22 8.1.5 Requirements for design of branches 22 8.1.6 Requirements for design of reinforcing pads . 22 8.1.7 General requirements for calculation of cross-sectional and
21、 pressure-loaded areas . 23 8.2 Efficiency factor, alternative calculation method, maximum diameter of an un-reinforced opening . 23 DIN EN 12953-3:2016-12EN 12953-3:2016 (E) 3 8.2.1 General 23 8.2.2 Allowable efficiency and maximum diameter of an unreinforced opening . 24 8.2.3 Isolated openings .
22、24 8.2.4 Adjacent openings . 25 8.3 Design of openings and branches in shells (efficiency and reinforcement) 25 8.3.1 Symbols and abbreviations 25 8.3.2 Requirements for application . 26 8.3.3 Design of isolated openings and branch connections 30 8.3.4 Design of adjacent openings and branch connecti
23、ons . 32 9 Ends 33 9.1 Unstayed dished heads without openings 33 9.1.1 Unstayed dished heads under internal pressure . 33 9.1.2 Limiting conditions . 33 9.1.3 Unstayed dished heads under external pressure 35 9.2 Flat unstayed removable closures . 36 9.3 Unstayed flat plates. 37 10 Supported flat pla
24、tes, stays and stiffeners . 38 10.1 Breathing space for flat plates 38 10.2 Stayed flat surfaces . 40 10.2.1 General 40 10.2.2 Radius of flange 40 10.2.3 Point of support 40 10.2.4 Thickness 41 10.2.5 Values of constant C4. 44 10.2.6 Stays for wet back reversal chambers . 54 10.2.7 Stay tubes and ba
25、rs . 56 10.2.8 Loads on stay tubes and bar stays . 56 10.2.9 Gusset stays 56 10.2.10 Weld attachments . 58 10.2.11 Additional requirements for set-in end plates . 58 10.2.12 Girder stays supporting the flat section of a reversal chamber . 60 11 Design of isolated openings in boiler flat end plates 6
26、0 11.1 Unreinforced isolated openings . 60 11.2 Branch openings 60 11.3 Manholes, headholes and handholes 62 12 Unpierced tubes and tube plates . 63 12.1 Thickness of straight tubes subject to external pressure . 63 12.2 Thickness of straight tubes subject to internal pressure 64 12.3 Wall thickness
27、 and ovality of elbows and tube bends 64 12.3.1 General 64 12.3.2 Departure from circularity of the tube bends . 64 12.4 Smoke tubes. 66 12.5 Pitch of tubes . 70 12.6 Thickness of the tube plates within tube nests . 70 13 Furnaces tubes, furnace components and reversal chambers of cylindrical form s
28、ubject to external pressure . 71 13.1 Furnaces tubes 71 13.1.1 Plain furnaces tubes . 71 13.1.2 Corrugated furnaces tubes . 71 13.1.3 Safety factors . 72 13.1.4 Furnace components 72 13.1.5 Reversal chambers 72 13.2 Calculation length of composite furnaces tubes . 73 13.3 Tolerances of furnaces tube
29、s. 74 13.4 Stiffeners . 74 DIN EN 12953-3:2016-12EN 12953-3:2016 (E) 4 13.4.1 General 74 13.4.2 Stiffener sections made from bar or plate . 75 13.4.3 Stiffeners located within the zone of peak heat flux 75 13.4.4 Bowling hoops 75 14 Access and inspection openings 78 14.1 General requirements . 78 14
30、.2 Types and minimum dimensions of access and inspection openings 79 14.3 Minimum gasket bearing width and clearance for access and inspection doors 81 14.4 Access and inspection openings in flat plates . 81 14.5 Requirements for entry area into boilers with a shell outside diameter greater than 1 4
31、00 mm 81 14.6 Accessibility and arrangement of entry and inspection openings 81 Annex A (informative) Calculation form for “Walker”-type reverse curve sections or corrugations 82 Annex B (normative) Furnace calculation temperature 84 B.1 Calculation of the maximum and the middle furnace wall tempera
32、ture 84 Annex C (informative) Calculation of tube plate temperatures 87 C.1 General 87 C.2 Symbols . 87 C.3 Calculation method . 88 C.3.1 Radiation coefficients 88 C.3.2 Convection coefficients . 92 C.3.3 Weighted average gas-side heat transfer coefficient . 95 C.3.4 Tube plate thermal conductance .
33、 97 C.3.5 Water side heat transfer . 98 C.3.6 Tube plate temperatures 98 C.4 Example of a calculation carried out using the method given in C.3 101 C.4.1 Design data assumed . 101 C.4.2 Calculation of radiation coefficient 102 C.4.3 Calculation of convection coefficients . 102 C.4.4 Calculation of w
34、eighted average gas-side heat transfer coefficient . 102 C.4.5 Calculation of tube plate thermal conductance 102 C.4.6 Calculation of tube plate temperatures 103 Annex D (normative) Economizer and superheater with water tube design connected to the shell boiler . 104 D.1 General 104 D.2 Design of ec
35、onomizer and superheater connected to shell boilers 104 Annex E (informative) Significant technical changes between this European Standard and the previous edition . 106 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2014/68/EU aimed
36、 to be covered . 107 Bibliography 108 DIN EN 12953-3:2016-12EN 12953-3:2016 (E) 5 European foreword This document (EN 12953-3:2016) has been prepared by Technical Committee CEN/TC 269 “Shell and wa-ter-tube boilers”, the secretariat of which is held by DIN. This European Standard shall be given the
37、status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2016, and conflicting national standards shall be with-drawn at the latest by November 2016. Attention is drawn to the possibility that some of the elements of this document may be
38、the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12953-3:2002. This document has been prepared under a mandate given to CEN by the European Commission and the Eu-ropean Free Trade Association, an
39、d supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. The informative Annex E lists the significant technical changes between this European Standard and the pre-vious edition. EN 12953, Shell
40、 boilers, consists of the following parts: Part 1: General Part 2: Materials for pressure parts of boilers and accessories Part 3: Design and calculation for pressure parts Part 4: Workmanship and construction of pressure parts of the boiler Part 5: Inspection during construction, documentation and
41、marking of pressure parts of the boiler Part 6: Requirements for equipment for the boiler Part 7: Requirements for firing systems for liquid and gaseous fuels for the boilers Part 8: Requirements for safeguards against excessive pressure Part 9: Requirements for limiting devices of the boiler and ac
42、cessories Part 10: Requirements for feedwater and boiler water quality Part 11: Acceptance tests Part 12: Requirements for grate firing systems for solid fuels for the boiler Part 13: Operating instructions (CR 12953) Part 14: Guideline for involvement of an inspection body independent of the manufa
43、cturer Although these parts can be obtained separately, it should be recognized that the parts are interdependent. As such, the design and manufacture of shell boilers requires the application of more than one part in order for the requirements of the standard to be satisfactorily fulfilled. DIN EN
44、12953-3:2016-12EN 12953-3:2016 (E) 6 NOTE A “Boiler Helpdesk” has been established in CEN/TC 269 which may be contacted for any questions regard-ing the application of the European Standards series EN 12952 and EN 12953, see the following website: http:/www.boiler-helpdesk.din.de According to the CE
45、N/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 Yugoslav Republic of Macedonia, France, Germany, Greece, Hunga
46、ry, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu-gal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12953-3:2016-12EN 12953-3:2016 (E) 7 1 Scope This Part of this European Standard specifies require
47、ments for the design and calculation of pressure parts of shell boilers as defined in EN 12953-1. For other components such as water tube walls reference should be made to EN 12952 series. 2 Normative references The following documents, in whole or in part, are normatively referenced in this documen
48、t and are indis-pensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1092-1:2007+A1:2013, Flanges and their joints Circular flanges for pipes, valves, fittings
49、and accesso-ries, PN designated Part 1: Steel flanges EN 10160, Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm (reflection method) EN 12952-3:2011, Water-tube boilers and auxiliary installations Part 3: Design and calculation for pressure parts of the boiler EN 12953-1:2012, Shell boilers Part 1: General EN 12953-2:2012, Shell boilers Part 2: Materials for pressure parts of boilers and accessories EN 12953-4
