1、BSI Standards PublicationBS EN 12760:2016Industrial valves Socketwelding ends for steel valvesBS EN 12760:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12760:2016. Itsupersedes BS EN 12760:1999 which is withdrawn.The UK participation in its preparation wa
2、s entrusted to TechnicalCommittee PSE/18/1, Industrial valves, steam traps, actuators andsafety devices against excessive pressure - Valves - Basic standards.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include
3、all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 91086 9ICS 23.040.60Compliance with a British Standard cannot confer immunity fromlegal obligations.This British S
4、tandard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2016.Amendments issued since publicationDate Text affectedBS EN 12760:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12760 April 2016 ICS 23.040.60 Supersedes EN 12760:1999English Version In
5、dustrial valves - Socket welding ends for steel valves Robinetterie industrielle - Extrmits emboter et souder pour appareils de robinetterie en acier Industriearmaturen - Schweimuffenenden fr Armaturen aus Stahl This European Standard was approved by CEN on 3 March 2016. CEN members are bound to com
6、ply 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-CENELE
7、C 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 Management Centre has the s
8、ame 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, Lithuania, Luxembour
9、g, 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 17, B-1000 Brussels 2
10、016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12760:2016 EBS EN 12760:2016EN 12760:2016 (E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Requirements . 4 5 Designation
11、 5 Annex A (informative) Recommended welding detail 6 BS EN 12760:2016EN 12760:2016 (E) 3 European foreword This document (EN 12760:2016) 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 statu
12、s of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2016, and conflicting national standards shall be withdrawn at the latest by October 2016. Attention is drawn to the possibility that some of the elements of this document may be the subj
13、ect of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12760:1999. The main change is the update of the standard to be in compliance with the present rules for the structure and drafting of CEN-CENELEC publica
14、tions. 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 Yugoslav Republic of Macedonia, Fran
15、ce, 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. BS EN 12760:2016EN 12760:2016 (E) 4 1 Scope This European Standard specifies the
16、 dimensions of socket welding ends of steel valves designed to be socket welded to standardised pipes in the size range DN 6 to DN 65. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated
17、 references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 736-1, Valves Terminology Part 1: Definition of types of valves EN 736-2, Valves Terminology Part 2: Definition of components of valves EN 736-3,
18、Valves Terminology Part 3: Definition of terms ISO 4200, Plain end steel tubes, welded and seamless General tables of dimensions and masses per unit length 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 736-1, EN 736-2 and EN 736-3 apply. 4 Requireme
19、nts 4.1 Socket welding ends of steel valve bodies shall have the form shown in Figure 1 and dimensions as stated in Table 1. 4.2 The width of the flat welding surface, C, shall not be less than 0,81 x Pipe wall thickness as specified in ISO 4200 or 3 mm, whichever is the greater. Figure 1 Socket wel
20、ding end detail BS EN 12760:2016EN 12760:2016 (E) 5 Table 1 Dimensions of socket welding ends Valve DN (Nominal Size) DN 6 DN 8 DN 10 DN 15 DN 20 DN 25 DN 32 DN 40 DN 50 DN 65 Inside diameter of socket max. 11,15 14,60 18,05 22,20 27,55 34,30 43,05 49,15 61,60 77,40 B in mm. min. 10,65 14,10 17,55 2
21、1,70 27,05 33,80 42,55 48,65 61,10 76,80 Depth of socket S in mm. min. 10,0 10,0 10,0 10,0 13,0 13,0 13,0 13,0 16,0 16,0 5 Designation A socket welding end shall be designated by the following: the wording “socket welding end (SW)”; the number of this European Standard, i.e. EN 12760; the nominal si
22、ze DN of the valve, e.g. DN 50. EXAMPLE Socket welding end (SW) EN 12760 DN 50. BS EN 12760:2016EN 12760:2016 (E) 6 Annex A (informative) Recommended welding detail It is recommended that the width of fillet weld Cxas shown in Figure A.1 should not be less than 1,09 x pipe wall thickness or 3 mm, wh
23、ichever is the greater. A gap of approximately 2 mm should be left between the bottom of the socket and the end of the pipe. Key Z 0,707 x Cxa Approximately 2,0 mm before welding Figure A.1 Recommended welding detail This page deliberately left blankBSI is the national body responsible for preparing
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