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1、BS EN 10253-3:2008 ICS 23.040.40; 77.140.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Butt-welding pipe fittings Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements Licensed Copy: London S
2、outh Bank University, South Bank University, 30/01/2009 13:46, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2008 BSI 2008 ISBN 978 0 580 54047 9 Amendments/corrigenda issued since publication DateComm
3、ents BS EN 10253-3:2008 National foreword This British Standard is the UK implementation of EN 10253-3:2008. It supersedes BS 1640-2:1962 and BS 1640-4:1968 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/19, Pipe fittings (other than cast iron).
4、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 necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity fro
5、m legal obligations. Licensed Copy: London South Bank University, South Bank University, 30/01/2009 13:46, Uncontrolled Copy, (c) BSI BS EN 10253-3:2008 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10253-3 November 2008 ICS 23.040.40; 77.140.20 English Version Butt-welding pipe fittings - Pa
6、rt 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements Raccords souder bout bout - Partie 3: Aciers inoxydables austnitiques et austno-ferritiques sans contrle spcifique Formstcke zum Einschweien - Teil 3: Nichtrostende austenitische und a
7、ustenitisch-ferritische (Duplex-) Sthle ohne besondere Prfanforderungen This European Standard was approved by CEN on 18 October 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 s
8、tandard without any alteration. Up-to-date lists and 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 ot
9、her language made by translation under the responsibility 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, Estoni
10、a, Finland, France, Germany, Greece, Hungary, Iceland, 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 EUROPI
11、SCHES KOMITEE FR NORMUNG Management Centre: rue de 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 10253-3:2008: E Licensed Copy: London South Bank University, South Bank University, 30/01/2009 13:4
12、6, Uncontrolled Copy, (c) BSI BS EN 10253-3:2008 EN 10253-3:2008 (E) 2 Contents Page Foreword4 Introduction.6 1 Scope 7 2 Normative references7 3 Terms, definitions and symbols.9 3.1 Terms and definitions .9 3.2 Symbols9 4 Classification of grades and designation .10 4.1 Classification of grades 10
13、4.2 Designation 11 5 Information to be obtained from the purchaser .11 5.1 Mandatory information11 5.1.1 Designation of fittings.11 5.1.2 Information.11 5.2 Options .12 5.3 Examples of an order 12 5.3.1 Example 1 .12 5.3.2 Example 2 .12 5.3.3 Example 3 .13 5.3.4 Example 4 .13 6 Manufacturing process
14、 .13 6.1 Steelmaking process.13 6.2 Product making process for fittings and heat treatment.13 6.2.1 Product making process.13 6.2.2 Welding.14 6.2.3 Heat treatment14 7 Technical requirements 15 7.1 General15 7.2 Chemical composition - Cast analysis15 7.3 Weldability15 7.4 Mechanical properties at ro
15、om temperature.19 7.5 Corrosion resistance.23 7.6 Appearance and internal soundness.23 7.6.1 Appearance 23 7.6.2 Internal soundness23 7.7 Dimensions and tolerances24 7.7.1 General24 7.7.2 Dimensions.24 7.7.3 Dimensional tolerances 28 7.7.4 Performance of the end bevelling31 7.8 Leak tightness31 8 In
16、spection.31 8.1 Inspection documents.31 8.1.1 Types of inspection documents.31 8.1.2 Content of inspection documents31 8.2 Summary of inspection and testing.31 9 Sampling.32 Licensed Copy: London South Bank University, South Bank University, 30/01/2009 13:46, Uncontrolled Copy, (c) BSI BS EN 10253-3
17、:2008 EN 10253-3:2008 (E) 3 9.1 Frequency of tests.32 9.1.1 Test unit32 9.2 Preparation of samples and test pieces33 9.2.1 Samples and test pieces for mechanical tests.33 9.2.2 Test piece for the tensile test on the base material.33 9.2.3 Test piece for the tensile test on the weld33 9.2.4 Test piec
18、e for the weld bend test.34 9.2.5 Test piece for the intergranular corrosion test 34 10 Test methods .34 10.1 Chemical analysis .34 10.2 Tensile test on the base material.34 10.2.1 At room temperature.34 10.2.2 At elevated temperature34 10.3 Transverse tensile test on the weld.34 10.4 Weld bend test
19、.35 10.5 Intergranular corrosion test .35 10.6 Dimensional testing 35 10.7 Visual inspection.35 10.8 Non destructive testing.35 10.8.1 Personnel .35 10.8.2 NDT of the weld .35 10.9 Material identification35 10.10 Leak tightness test35 10.11 Optional tests.36 11 Marking.36 11.1 Marking to be applied3
20、6 12 Handling and packaging.37 Annex A (normative) Structural dimensions of fittings38 Annex B (informative) Commonly used inside diameters and wall thicknesses, metric sizes 45 Bibliography47 Licensed Copy: London South Bank University, South Bank University, 30/01/2009 13:46, Uncontrolled Copy, (c
21、) BSI BS EN 10253-3:2008 EN 10253-3:2008 (E) 4 Foreword This document (EN 10253-3:2008) has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes”, the secretariat of which is held by UNI. This European Standard shall be given the status of a national standard, e
22、ither by publication of an identical text or by endorsement, at the latest by May 2009, and conflicting national standards shall be withdrawn at the latest by May 2009 .EN 10253 comprises a series of European Standards about Butt-welding pipe fittings, namely: Part 1: Wrought carbon steel for genera
23、l 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 austenitic and austenitic-ferriti
24、c (duplex) stainless steels with specific inspection requirements Part 5: Wrought austenitic and austenitic-ferritic (duplex) stainless steels for use as construction products In writing EN 10253 the competent committee recognized that there are two broad types of products commonly used for stainles
25、s steels, and decided to reflect these in the standard by differentiating between two parts. EN 10253-1 describes fittings without formal reference to the pressure resistance, which are not intended to be used in applications covered by the Pressure Equipment Directive (97/23/EC). EN 10253-2 defines
26、 two types of fittings : Type A fittings have the same wall thickness at the welding ends and at the body of the fitting 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 dimensions. Type B fitt
27、ings 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 Directive and furthe
28、r 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 recognized the need to p
29、rovide 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 (97/23/EC) except applica
30、tions according to Article 3 Paragraph 3. The application standards for the Pressure Equipment Directive category I - IV will require that the fitting is designed to withstand a defined resistance to internal pressure. This approach is considered in Part 4. Information about structural dimensions of
31、 fittings is given in Annex A and commonly used dimensions and wall thicknesses are given in Annex B. The selection of steel type and requirement level depend on many factors; the properties of the fluid to be conveyed, the service conditions, the design code and any statutory requirements should al
32、l be taken into consideration. Therefore this standard gives no detailed guidelines for the application of different parts. It is the ultimate responsibility of the user to select the appropriate part for the intended application. Licensed Copy: London South Bank University, South Bank University, 3
33、0/01/2009 13:46, Uncontrolled Copy, (c) BSI BS EN 10253-3:2008 EN 10253-3:2008 (E) 5 Attention is drawn to the 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. A
34、ccording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
35、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, South Bank University, 30/01/2009 13:46, Uncontrolled Copy, (c) BSI BS EN 10253-3:2008 EN 10253-3:2
36、008 (E) 6 Introduction The European Organisation for Standardization (CEN) draws attention to the fact that it is claimed that compliance with this document may involve the use of patents applied to steel grade 1.4410, the compositions of which is given in Table 3. CEN takes no position concerning t
37、he evidence, validity and scope of these patent rights. The holder of these patent rights has assured CEN that he/she are willing to negotiate licences, under reasonable and non-discriminatory terms and conditions, with applicants throughout the world. In this respect, the statements of the holders
38、of these patent rights are registered with CEN. Information may be obtained from: Sandvik AB SE-811 81 SANDVIKEN Sweden Attention is drawn to the possibility that some of the elements within this document may be the subject of patent rights other than those indicated above. CEN shall not be responsi
39、ble for identifying any or all such patents rights. Licensed Copy: London South Bank University, South Bank University, 30/01/2009 13:46, Uncontrolled Copy, (c) BSI BS EN 10253-3:2008 EN 10253-3:2008 (E) 7 1 Scope 1.1 This part of EN 10253 specifies the technical delivery requirements for seamless a
40、nd welded butt- welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and austeniticferritic (duplex) stainless steel without specific inspection requirements. It specifies: steel grades; mechanical properties; dimensions and tolerances; requi
41、rements for inspection and testing; inspection documents; marking; handling and packaging. 1.2 Limitation of use The allowed pressures and temperatures are the responsibility of the customer according to the state of the art and in application of the safety coefficients in the application regulation
42、s, codes and standards. In common, joint coefficient is used in the calculation of the thicknesses of components which include one or several butt welds, other than circumferential: for equipment subject to random non-destructive testing: 0,85; for equipment not subject to non-destructive testing ot
43、her than visual inspection: 0,7. 1.3 Unless otherwise specified in this part of EN 10253 the general technical delivery requirements in EN 100021 apply. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the ed
44、ition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 287-1, Qualification test of welders Fusion welding Part 1: Steels EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials Welding pr
45、ocedure specification Part 1: Arc welding (ISO 15609-1:2004) EN 910, Destructive tests on welds in metallic materials Bend tests EN 1418, Welding personal Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic mater
46、ials EN 10002-1, Metallic materials Tensile testing Part 1: Method of test at ambient temperature Licensed Copy: London South Bank University, South Bank University, 30/01/2009 13:46, Uncontrolled Copy, (c) BSI BS EN 10253-3:2008 EN 10253-3:2008 (E) 8 EN 10002-5, Metallic materials Tensile testing P
47、art 5: Method of testing at elevated temperature EN 10020:2000, Definition and classification of grades of steel EN 10021:2006, General technical delivery conditions for steel products EN 10027-1, Designation systems for steel Part 1: Steel names EN 10027-2, Designation systems for steel Part 2: Num
48、erical system EN 10028-7, Flat products made of steels for pressure purposes Part 7: Stainless steels EN 10052, Vocabulary of heat treatment terms for ferrous products EN 10079:2007, Definition of steel products EN 10088-2, Stainless steels Part 2: Technical delivery conditions for sheet/plate and s
49、trip of corrosion resisting steels for general purposes EN 10088-3, Stainless steels Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes EN 10168, Steel products Inspection documents List of information and description EN 10204, Metallic products Types of inspection documents EN 10216-5, Seamless steel tubes for pressure purposes Technical delivery conditions Part 5: Stainless steel tubes EN 10217-7,
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