BS EN 10253-4-2008 Butt-welding pipe fittings. Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements.pdf
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1、BRITISH STANDARD BS EN 10253-4:2008 Butt-welding pipe fittings Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements ICS 23.040.40; 77.140.20 ? Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of
2、07/12/2008 07:50, (c) BSI BS EN 10253-4:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008 ISBN 978 0 580 53411 9 National foreword This British Standard is the UK implementation of EN 10253-4:2008. It partially super
3、sedes BS 1640-2:1962 and BS 1640-4:1968, which will be withdrawn upon publication of BS EN 10253-3. The UK participation in its preparation was entrusted to Technical Committee ISE/19, Pipe fittings (other than cast iron). A list of organizations represented on this committee can be obtained on requ
4、est to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication DateComme
5、nts Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 07/12/2008 07:50, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10253-4 March 2008 ICS 23.040.40; 77.140.20 English Version Butt-welding pipe fittings - Part 4: Wrought austenitic and au
6、stenitic-ferritic (duplex) stainless steels with specific inspection requirements Raccords souder bout bout - Partie 4: Aciers inoxydables austnitiques et austno-ferritiques avec contrle spcifique Formstcke zum Einschweien - Teil 4: Austenitische und austenitisch-ferritische (Duplex-)Sthle mit beson
7、deren Prfanforderungen This European Standard was approved by CEN on 5 January 2008. CEN members 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 a
8、nd bibliographical references concerning such national standards may be obtained on application to the CEN 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 respons
9、ibility of a CEN member into its own language 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, Icel
10、and, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de
11、 Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10253-4:2008: E Licensed copy: The University of Hong Kong, The University of Hong Kong, Version correct as of 07/12/2008 07:50, (c) BSI EN 10253-4:2
12、008 (E) 2 Contents Foreword3 Introduction.4 1Scope 5 2Normative references5 3Terms and definitions .7 4Symbols8 5Classification of grades and designation .9 6Information to be supplied by the purchaser .9 7Resistance to internal pressure.12 8Manufacturing process .12 9Technical requirements 14 10App
13、earance and internal soundness.22 11Dimensions and tolerances23 12Inspection.31 13Sampling.33 14Test methods35 15Marking.38 16Handling and packaging .38 Annex A (normative) Structural dimensions of fittings.39 Annex B (normative) Determination of pressure factors and wall thickness46 Annex C (normat
14、ive) Pressure factor tables for fittings of type A.67 Annex D (informative) Wall thickness tables for fittings of type B 80 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of the EU Directive 97/23/EC96 Bibliography97 BS EN 10253-4:2008 Licensed copy
15、: The University of Hong Kong, The University of Hong Kong, Version correct as of 07/12/2008 07:50, (c) BSI EN 10253-4:2008 (E) 3 Foreword This document (EN 10253-4:2008) has been prepared by Technical Committee ECISS/TC 29 “ Steel tubes and fittings for steel tubes” , the secretariat of which is he
16、ld by UNI/UNSIDER. 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 September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. Attention is drawn to the
17、possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Tr
18、ade Association, and supports essential requirements of the EU Directive 97/23/EC. For relationship with the EU Directive 97/23/EC, see informative Annex ZA, which is an integral part of this document. EN 10253 comprises a series of European Standards about Butt-welding pipe fittings, namely: Part 1
19、: Wrought carbon steel for general use and without specific inspection requirements Part 2: Non alloy and ferritic alloy steels with specific inspection requirements Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements Part 4: Wrought
20、austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements In writing EN 10253 the competent committee recognized that there are two broad types of products commonly used for stainless steels, and decided to reflect these in the standard by differentiating bet
21、ween two parts, Part 3 and Part 4. Part 4 defines two types of fittings: Type A fittings have the same wall thickness at the welding ends than a pipe having the same specified wall thickness. Their resistance to internal pressure is, in general, less than that of a straight pipe with the same dimens
22、ions. Type B fittings showing increased wall thickness at the body of the fitting are designed to resist the same internal pressure as a straight pipe with same dimensions. These two types of fittings are intended to be used in applications covered by the EU Directive 97/23/EC. According to this Dir
23、ective and further interpretation guidelines (e.g. guideline 7/19), seamless fittings are considered as materials whereas welded fittings are considered as components. Therefore, in some areas of this European Standard, provisions for seamless and welded fittings are different. The committee recogni
24、zed the need to provide a basic type in which the minimum wall thickness of the fitting is guaranteed without formal reference to the pressure resistance. This type is considered in Part 3 and includes products not intended for use in applications covered by the Pressure Equipment Directive category
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