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1、a Date: 12 June 2007 Origin: European Latest date for receipt of comments: 30 September 2007 Project no.: 2007/00714 Responsible committee: PVE/1 Pressure vessels Interested committees: Title: Draft BS EN 13445-6:2002/A3 Unfired pressure vessels Part 6: Requirements for the design and fabrication of
2、 pressure vessels and pressure parts constructed from spheroidal graphite cast iron Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affect
3、ed, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 September 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior
4、 to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organizatio
5、n for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-. British, International and foreign standards
6、 are also available from BSI Customer Services. British Standards on CD or Online are available from British Standards Publishing Sales Limited. Tel: 01344 404409 or email bsonlinetechindex.co.uk. Information on the co-operating organizations represented on the committees referenced above may be obt
7、ained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 020 8996 7990 Responsible Comm
8、ittee Secretary: Miss Sarah Kelly (BSI) E-mail: sarah.kellybsi- Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30163939 DC Licensed Copy: London South Bank University, London South Bank Unive
9、rsity, Sun Jun 17 07:04:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on European discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent British Standard. If no com
10、ments are received to the contrary, then the UK will approve this draft and implement it as a British Standard. Comment is particularly welcome on national, legislative or similar deviations that may be necessary. Even if this draft standard is not approved by the UK, if it receives the necessary su
11、pport in Europe, the UK will be obliged to publish the official English Language text unchanged as a British Standard and to withdraw any conflicting standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The g
12、uidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the
13、 address given on the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments
14、 submitted should be presented as given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/www.bsi- Template for comments and secretariat observations Date: xx/xx/200x Document:
15、 ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is
16、 ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and
17、 MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:04:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM DRAFT EN 13445-6:2002 pr
18、A3 May 2007 ICS English Version Unfired pressure vessels - Part 6: Requirements for the design and fabrication of pressure vessels and pressure parts constructed from spheroidal graphite cast iron Rcipients sous pression non soumis la flamme - Partie 6: Exigences pour la conception et la fabrication
19、 des rcipients sous pression et des parties sous pression mouls en fonte graphite sphrodal Unbefeuerte Druckbehlter - Teil 6: Anforderungen an die Konstruktion und Herstellung von Druckbehltern und Druckbehlterteilen aus Gusseisen mit Kugelgraphit This draft amendment is submitted to CEN members for
20、 enquiry. It has been drawn up by the Technical Committee CEN/TC 54. This draft amendment A3, if approved, will modify the European Standard EN 13445-6:2002. If this draft becomes an amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f
21、or inclusion of this amendment into the relevant national standard without any alteration. This draft amendment was established by CEN 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 langu
22、age and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lu
23、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting docume
24、ntation. Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Man
25、agement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13445-6:2002/prA3:2007: E Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:04:34 GMT+00
26、:00 2007, Uncontrolled Copy, (c) BSI EN 13445-6:2002/prA3:2007 (E) 2 Contents Page Foreword3 5 Requirements.4 7 Testing and final assessment.4 Annex D (normative) Assessment of fatigue life .5 D.6.1 Pseudo-elastic stress range.5 D.6.3 Fatigue design curves.5 D.7.2 Corrections to stress range9 D.7.3
27、Fatigue design curves.10 Annex ZA (informative) Relationship between this European Standard and the essential requirements of the EU Directive 97/23/EC.11 Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:04:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 1344
28、5-6:2002/prA3:2007 (E) 3 Foreword This document (EN 13445-6:2002/prA3:2007) has been prepared by Technical Committee CEN/TC 54 “Unfired pressure vessels”, the secretariat of which is held by BSI. This document is currently submitted to the CEN Enquiry. This document has been prepared under a mandate
29、 given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, B, C or D, which is an integral part of this document. This document includes the text of the ame
30、ndment itself. The corrected pages of EN 13445-6 will be delivered as issue xx of the standard. Licensed Copy: London South Bank University, London South Bank University, Sun Jun 17 07:04:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 13445-6:2002/prA3:2007 (E) 4 5 Requirements Replace 5.2.2.1.8 w
31、ith the following: 5.2.2.1.8 Simplified fatigue assessment (SFA) A simplified fatigue assessment will return a value of maximum allowable number of equivalent pressure fluctuations under service conditions. The assessment shall be performed according to Annex D. A maximum stress concentration factor
32、 of 3 is pre-supposed, unless for construction details as limited in Table D-1A where equal or lower values than 3 may be used. NOTE This Table D-1A may also be used for other metallic castings than spheroidal graphite cast iron(i.e. cast steel, cast aluminium and so on), but is retained in EN 13445
33、-6 until further notice. 7 Testing and final assessment Change the reference in the second sentence of 7.1.7 from Table 4 to Table 3 as follows: The maximum severity level shall be equal to or better than SM 3 in Table 2 of EN 1369:1996 and LM4/AM4 in Table 3 of EN 1369:1996. Licensed Copy: London S
34、outh Bank University, London South Bank University, Sun Jun 17 07:04:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 13445-6:2002/prA3:2007 (E) 5 Annex D (normative) Assessment of fatigue life D.6.1 Pseudo-elastic stress range Replace clause the 3rd and 4th paragraph of D.6.1 with the following tex
35、t: For each component the value of the stress concentration factor is obtained from Table D.1A . For details which are not described in Table D-1A, a value for of 3 shall be used, except if a lower value can be justified by i.e. 3-D finite element modelling, experimental analysis, etc. and accepted
36、by the parties concerned. NOTE 4 It is no longer required to use Table 17-1 from EN 13445-3 substituting the weld joint factor z=1. D.6.3 Fatigue design curves Replace the NOTE under Figure D.1 with the following text: NOTE These fatigue design curves have been derived from those given in D.7 for de
37、tailed assessment (Figure D.2). They incorporate the notch effect of all local stress concentrations whose Kt factor does not exceed approximately 2 Instead of 2, we can also use the more accurate value 1,88 which is the ratio of the endurance limit of the design curves in figure D.2 over that in Fi
38、gure D.1.For the definition of the theoretical stress concentration factor Kt (see D.7.1 , equation D.7.3). They are valid for the same probability of survival, i.e. Ps 97,7% Add the following text and Table after the NOTE: The value of is obtained from Table D.1A for each vessel detail. It is an up
39、per bound of the following ratio: max Pataildettheinstressstructuralimummax etemperaturncalculatioatstressdesignalminno To assess the fatigue life of a detail not covered by Table D.1A, the value shall be obtained through an estimate of the maximum structural stress in the detail under pressure Pmax
40、. For simplification, the maximum value for the whole vessel can be taken as same value for any detail. NOTE These values apply equally for any cast part made from metallic material (cast steel, cast aluminium, etc.) since it is only depending on material structure. Licensed Copy: London South Bank
41、University, London South Bank University, Sun Jun 17 07:04:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 13445-6:2002/prA3:2007 (E) 6 Table D.1A Stress factor and associated maximum pressure for typical cast constructions Detail description Detail Maximum permissible pressure Pmax Conditions Stre
42、ss factor Cylindrical or conical shells Left intentionally blank Cylindrical shell: Part 3, equation (7.4.3) Conical Shell: Part 3, equation (7.6.4) 1,0 Pad for data plate on cylindrical or conical shell As for shell details b r eaf 3,0 Opening in flat end See Part 3, Clause 10.6.1 2,0 Separation ri
43、b in dished cover As for cover detail, see Annex G ea ec 1,1 Notes 1. The maximum calculation pressure is not given explicitly in Part 3 Clause 11. It shall be calculated as the pressure which gives stresses to their allowable limits, or in Part 3 Annex G a load ratio equal to 1,0. As a conservative
44、 simplification Pmax may be taken as Pdesign. 2. For use within the present clause, Pmax is taken as equal to Py given by equation 7.5-7 in Part 3. The other possible determinations Ps and Pb (given by equations 7.5-6 and 7.5-8 respectively) are not relevant here. 3. The maximum calculation pressure
45、 is that of the flat end (not that of the adjacent cylindrical shell). In formula D.6-1, the value f to be introduced is the lowest of that for the end and that for the shell. 4. Since no explicit formula is given for Pmax in Part 3 Clause 10, Pmax shall be calculated as the pressure which gives the
46、 required end thickness equal to the analysis thickness. As a conservative simplification Pmax may be taken as Pdesign. 5. eaf is the analysis thickness of flat end calculated without opening (see Part3 Clause 10.4.3) D.7.2 Corrections to stress range Replace the last line of sub-clause D7.2.1, with
47、 the following text: For emax150 mm, the value of fe for emax = 150 mm applies Replace clause D.7.2.3, formula D.7.7 with the following: () = 200 R lnRln03,01F m zs (D.7.7) Replace clause D.7.2.5, with the following text: D.7.2.5 Plasticity correction factors Correction factors for mechanical (ke) a
48、nd thermal (kv) loadings in the hyper plastic range can be ignored, as a result of the high safety factors on 0,2 % proof strength used for the calculation of the nominal design stress in EN 13445-6 together with structural stresses never exceeding 3 times f. Licensed Copy: London South Bank Univers
49、ity, London South Bank University, Sun Jun 17 07:04:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 13445-6:2002/prA3:2007 (E) 10 D.7.3 Fatigue design curves Add the following NOTE after Figure D.2: NOTE The fatigue design curves in Figure D.2 have been derived from data (See ref 1) obtained from un-notched test pieces of spheroidal graphite cast iron grade EN-GJS-400-18 for axial and bending fatigue tests, tested u