1、 STD-BSI BS EN 12b27-ENGL 1999 1b24bb9 0800372 T50 m BRITISH STANDARD Industrial valves - Butt welding ends for steel valves The European Standard EN 126271999 has the status of a British Standard 8 ICs 23.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGKT LAW BS EN 12627: 199
2、9 STD-BSI BS EN 12b27-ENGL 1779 I Lb2LibbS 0800393 977 been prepared under the Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 October 1999 direction of the Engineering Amd. No. Date O ES1 10-1999 ISBN O 580 32675 6 BS EN 1262E1999 Comments
3、National foreword This British Standard is the English language version of EN 12627 1999. Together with BS EN 558-1: 1996 and BS EN 5582: 1996 it supersedes BS 2080 1989, which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee I”, Valves, to Subcommittee PSES
4、I1, Valves - Basic standards, which has the responsibility to: - aid enquirem to understand the text; - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK
5、 interests informed them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogu
6、e under the section entitled “hteniational Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Cataiogue. A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correc
7、t application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates
8、when the document was last issued. STDOBSI BS EN 12b27-ENGL 1777 D Lb24bb7 060037V 823 m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12627 May 1999 ICs 23.060.01 English version Industrial valves - Butt welding ends for steel valves Appareils de robinetterie - Extrmits souder en bout pour a
9、ppareils de robinetterie en acier Industrieannaturen - Anschweienden fr Armaturen aus Stahl This European Standard was approved by CEN on 16 April 1999. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the statu
10、s 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 Central Secretariat or to any CEN member. This European Standard exists in three oficial versions (English, French, German). A ver
11、sion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, Fra
12、nce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Pomigal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europeen de Normalisation Europisches Komitee fi Normung Central Secretanat: rue de Stassart, 36 B-1050 Brussels Q
13、1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref No. EN 12627: 1999 E Page 2 EN 12627:1999 Con tents Page Foreword 1 Scope 2 Nonnative references 3 Definitions 4 Symbols 5 Requirements 6 Designation Annex A (informative) Basis for this
14、 standard Annex B (informative) Bibliography 6 BSI 10-1999 STD-BSI BS EN 12b27-ENGL 1799 I lb24bb 080037b btb Page 3 EN 12627:1999 Foreword This European Standard has been prepared by Technical Committee CENITC 69, Industrial valves. the Secretariat of which is held by AFNOR. This European Standard
15、shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 1999, and conflicting national standards shall be withdrawn at the latest by November 1999. This European Standard has been prepared under a mandate given to CEN
16、by the European Commission and the European Free Trade Association. This European Standard is considered to be a supporting standard to those application and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this Eur
17、opean Standard. According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherla
18、nds, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. BSI 10-1999 Page 4 EN 12627: 1999 1 Scope This European Standard specifies the dimensions of butt welding ends of steel valves DN 8 to DN 1400 designed to be butt welded to standardized pipes. NOTE For the outside diameters an
19、d wall thickness of standardized pipes in accordance with IS0 4200 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed
20、hereafter. For dated references. subsequent amendments to or revisions of any of these publications apply to this European Standard. only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 736- 1. Valves - Terminolog
21、- - Part I: Definition of OB is the inside diameter of the pipe; Tis the wall thickness of the pipe; II, is the thickness of the valve butt welding end. 5 Requirements 5.1 Butt welding ends of steel valve bodies shall have the form and dimensions as shown in Figures 1.2,3,4 or 5 unless the contract
22、states that the weld to the pipe is to be ultrasonically tested. S.2 Where the weld to the pipe is to be ultrasonically tested. butt welding ends of steel valve bodies shall have the form and dimensions as shown in Figures 4 and 5 except that for globe valves of “Z“ form the 10“ maximum angle can be
23、 increased to 20“ maximum. (C, BSI I 0- I999 - STD*BSI BS EN LZb27-ENGL 1777 W lb2Libb7 0800378 Y77 I I Page 5 EN 12627:1999 DN 500 to DY 1400 5.3 For pipe wall thickness, T, greater than 4 mm and less than or equal to 22 mm, Figures 2 or 4 shall be used. For valves having a wall thickness, ?D. of l
24、ess than or equal to 4 mm, the butt welding ends can be cut square as shown in Figure 1. 5.4 For pipe wall thickness of more than 22 mm Figures 3 or 5 shall be used. 5.5 The inside and outside surfaces of the butt welding end shall be machined all over. The internal profile of the body is at the opt
25、ion of the manufacturer unless otherwise specified by the purchaser. 5.6 The outside diameter of OA of the butt welding end shall have the dimensions and tolerances as shown in Table 1 when the allowable stress of the valve butt welding end material is greater than or equal to that of the pipe mater
26、ial. Table 1 - Dimensions and tolerance of outside diameter, OA, of butt welding ends Tolerance +4 in min -2.5 5.7 When the allowable stress of the valve butt welding end material is less than that of the pipe material the thickness of the valve butt welding end shall be increased to compensate as s
27、hown in Figure 6. The thickness of the valve butt welding end shall be determined according to the equation: Allowable stress of pipe material Allowable stress of valve butt welding end material t,=Tx but limited to tD 5 1.5 x T. 5.8 The inside diameter of the butt welding end shall be equal to the
28、inside diameter of the pipe to which it is to be welded to within the tolerance stated in Table 2. Table 2 -Tolerance of inside diameter of butt welding ends C BC1 10-1999 STD*BSI BS EN 12b27-ENGL 1777 Lb2Libb7 0800377 305 W Page 6 EN 12627:1999 Figure 1 - Square butt welding end connection to pipe
29、of wall thickness TI 4mm J Figure 2 - Single-V butt weld end connection to pipe of wall thickness 4 mm 22 mm LI = 48 for T 50 Figure 5 - Single-V butt weld end connection with V root to pipe of wall thickness T 22 mm I Vaice butt welding end I Pipe Figure 6 -Acceptable design for unequal wall thickn
30、ess at the butt welding end of a valve BSI 10-1 999 Page 9 EN 12627:1999 6 Designation A butt welding end shall be designated by: - the wording “Butt welding end; - the reference to this standard (EN 12627); - the number of the corresponding figure of this standard (e.g. 3); - the DN (nominal size)
31、of the valve (e.g. DN 50) EXAMPLE: Butt welding end EN 12627 - 3 - DN 50 Annex A (informative) Basis for this standard The butt weid end connections used have been taken from EN 29692, the appropriate references being given hereafter: Figure I: EN 29692 reference I .2; Figures 2 and 3: EN 29692 refe
32、rence 1.5; Figures 4 and 5: EN 29692 reference 1.3.3; Experience has shown that these butt weld end connections are the most appropriate for the welding of valvc bodies to pipes and pipeline components. EN 29692 relates only to butt weld end connections. Moreover, this European Standard considers th
33、e dimensions of the valve body in the welding area. Annex B (informative) Bibliography EN 29692. Metal-arc welding with covered electrode, gas-shielde metal arc welding and gas w*elding -Joint prepararionsfor steel (IS0 9692: 1992). i BSI 10-1999 BS EN 12627: 1999 BSI 389 Chiswick High Road London w
34、4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revi
35、sion. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be mful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the S
36、ecretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel O20 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. B
37、uying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel 020 8996 9001. Fax: O20 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published
38、 as British Standards, unless otherwise requested Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technid Help to Exporters Service. Various BSI electronic information services are also available which gi
39、ve details on all its products and services. Contact the Information Centre. Tel O20 8996 71 11. Fax: 020 8996 7048. Subscribing members of BSI are kept up to dak with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits
40、 contact Membership Administration. Tel O20 8996 7002. Fax: O20 8996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standarmon bodies. Except as permitted under the Copyright, Designs and Patents Act 1988
41、no extract may be reproduced, stored in a retrieval system or tsansmitted in any form or by any means - electronic, photocopying, recording or otherwise - without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of nece- details such
42、 as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel O20 8996 7070.
