1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Industrial valves - Butt welding ends for steel valvesBS EN 12627:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12627 November 2017 ICS 23.060.01 Supersedes EN 12627:1999English Version Industrial valves - Bu
2、tt welding ends for steel valves Robinetterie industrielle - Extrmits souder en bout pour appareils de robinetterie en acier Industriearmaturen - Anschweienden fr Armaturen aus Stahl This European Standard was approved by CEN on 18 September 2017. CEN members are bound to comply with the CEN/CENELEC
3、 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 t
4、o 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 offici
5、al 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, N
6、orway, Poland, Portugal, Romania, Serbia, 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 2017 CEN All righ
7、ts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12627 ENational forewordThis British Standard is the UK implementation of EN 12627:2017. It supersedes BS EN 12627:1999, which is withdrawn.The UK participation in its preparation was entrusted t
8、o Technical Committee PSE/18/1, Industrial valves, steam traps, actuators and safety devices against excessive pressure - Valves - Basic standards.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the ne
9、cessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 94040 8ICS 23.060.01Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard
10、 was published under the authority of the Standards Policy and Strategy Committee on 31 December 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 12627:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12627 November 2017 ICS 23.060.01 Supersedes EN 1
11、2627:1999English Version Industrial valves - Butt welding ends for steel valves Robinetterie industrielle - Extrmits souder en bout pour appareils de robinetterie en acier Industriearmaturen - Anschweienden fr Armaturen aus Stahl This European Standard was approved by CEN on 18 September 2017. CEN m
12、embers 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 applic
13、ation 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 Mana
14、gement 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, Latvi
15、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, 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: Aven
16、ue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12627 EBS EN 12627:2017EN 12627:2017(E) 2 Contents Page European foreword . 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Symbo
17、ls . 4 5 Requirements . 4 5.1 Selection of angle . 4 5.2 Selection of other dimensions 5 6 Designation 9 Bibliography . 10 BS EN 12627:2017EN 12627:2017(E) 3 European foreword This document (EN 12627:2017) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretariat of whi
18、ch 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 May 2018, and conflicting national standards shall be withdrawn at the latest by May 2018. Attention is drawn to the possibilit
19、y that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12627:1999. The main changes compared to the previous edition are: a) change of the tolerance value and diame
20、ter for DN 65 in Table 2; b) introduction of angle in Figures 2, 3, 4, 5 and 6. c) editorial revision of this standard; d) deletion of Annex A giving the basis document from which the previous edition was taken. According to the CEN-CENELEC Internal Regulations, the national standards organisations
21、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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
22、therlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12627:2017EN 12627:2017(E) 4 1 Scope This European Standard specifies the dimensions of butt welding ends of steel valves DN 8 to DN 1 400 designed to be butt we
23、lded to standardized pipes. NOTE The outside diameters and wall thickness of standardized pipes are in accordance with ISO 4200. 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 refer
24、ences, 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, Valves
25、 Terminology Part 3: Definition of terms EN 1092-1, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 1: Steel flanges ASME B16.25, Buttwelding Ends 3 Terms and definitions For the purposes of this document, the terms and definitions given in E
26、N 736-1, EN 736-2 and EN 736-3 apply. 4 Symbols The symbols used in this standard are as follows: A is the outside diameter of the valve butt welding end, in mm (see Table 2); B is the inside diameter of the pipe, in mm; T is the wall thickness of the pipe, in mm; tDis the thickness of the valve but
27、t welding end, in mm; tnis the transition, in mm. 5 Requirements 5.1 Selection of angle Angle shall be selected from Table 1. Table 1 Selection of angle Type of weld-end Deviation Referred basic standard A 30 +5 EN 1092-1 B 37,5 2,5 ASME B16.25 BS EN 12627:2017EN 12627:2017(E) 5 5.2 Selection of oth
28、er dimensions Butt welding ends of steel valve bodies shall have the form and dimensions shown in Figures 1, 2, 3, 4 or 5, unless otherwise stated that the weld to the pipe is to be ultrasonically tested. Where the weld to the pipe is to be ultrasonically tested, butt welding ends of steel valve bod
29、ies shall have the form and dimensions shown in Figures 4 and 5, except that for globe valves of “Z” form the 10 maximum angle can be increased to 20 maximum. 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 thickne
30、ss, tD, of less than or equal to 4 mm, the butt welding ends can be cut square as shown in Figure 1. For pipe wall thickness of more than 22 mm, Figures 3 or 5 shall be used. The inside and outside surfaces of the butt welding end shall be machined all over. The internal profile of the body is at th
31、e discretion of the manufacturer unless otherwise specified by the purchaser. The outside diameter, A, of the butt welding end shall have the dimensions and tolerances as shown in Table 2 when the allowable stress of the valve butt welding end material is greater than or equal to that of the pipe ma
32、terial. Table 2 Dimensions and tolerance of outside diameter, A, of butt welding ends Valve nominal size DN 8 DN 10 DN 15 DN 20 DN 25 DN 32 DN 40 DN 50 DN 65 DN 80 DN 100 A in mm 14 18 22 28 35 44 50 62 78 91 117 Tolerance in mm +251,+2515,+252,+2525,Valve nominal size DN 125 DN 150 DN 200 DN 250 DN
33、 300 DN 350 DN 400 DN 450 DN 500 DN 600 DN 700 DN 750 A in mm 144 172 223 278 329 362 413 464 516 619 721 772 Tolerance in mm +425,Valve nominal size DN 800 DN 900 DN 1 000 DN 1 200 DN 1 400 A in mm 825 927 1 029 1 235 1 440 Tolerance in mm +425,BS EN 12627:2017EN 12627:2017(E) 6 When the allowable
34、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 shown in Figure 6. The thickness of the valve butt welding end shall be determined according to both Formulae (1) and (2). = PDvStTS(1)
35、 D15,tT (2) where Spis the allowable stress of pipe material; Svis the allowable stress of valve butt welding end material. The inside diameter of the butt welding end shall be equal to the inside diameter of the pipe to which it is to be welded to within the tolerance stated in Table 3. Table 3 Tol
36、erance of inside diameter of butt welding ends Valve nominal size DN 8 to DN 250 DN 300 to DN 450 DN 500 to DN 1 400 Tolerance in mm +11+22+32Figure 1 Buttwelding ends preparation for valves and transitions tn 4mm BS EN 12627:2017EN 12627:2017(E) 7 Figure 2 Single-V butt weld end connection to pipe
37、of wall thickness 4 mm 22 mm BS EN 12627:2017EN 12627:2017(E) 8 Key L148 for T 16 L13 T for 16 50 Figure 5 Single V butt weld end connection with V root to pipe of wall thickness T 22mm BS EN 12627:2017EN 12627:2017(E) 9 Key 1 valve butt welding end 2 pipe Figure 6 Acceptable design for unequal wall
38、 thickness at the butt welding end of a valve 6 Designation A butt welding end shall be designated by the following: the wording “Butt welding end”; the reference to this European Standard, i.e. EN 12627; the number of the corresponding figure of this European Standard (e.g. 3); the DN (nominal size
39、) of the valve (e.g. DN 50). EXAMPLE Butt welding end EN 126273 DN 50. BS EN 12627:2017EN 12627:2017(E) 10 Bibliography ISO 4200, Plain end steel tubes, welded and seamless General tables of dimensions and masses per unit length BS EN 12627:2017This page deliberately left blankThis page deliberately
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