1、BS EN10253-3:2008ICS 23.040.40; 77.140.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDButt-welding pipefittingsPart 3: Wrought austenitic andaustenitic-ferritic (duplex) stainlesssteels without specific inspectionrequirementsThis British Standardwas published
2、 under theauthority of the StandardsPolicy and StrategyCommittee on 31 December2008 BSI 2008ISBN 978 0 580 54047 9Amendments/corrigenda issued since publicationDate CommentsBS EN 10253-3:2008National forewordThis British Standard is the UK implementation of EN 10253-3:2008. Itsupersedes BS 1640-2:19
3、62 and BS 1640-4:1968 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/19, Pipe fittings (other than cast iron).A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to incl
4、ude all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 10253-3:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10253-3November 2008ICS 23.040.40; 77.140.20English Ver
5、sionButt-welding pipe fittings - Part 3: Wrought austenitic andaustenitic-ferritic (duplex) stainless steels without specificinspection requirementsRaccords souder bout bout - Partie 3: Aciersinoxydables austnitiques et austno-ferritiques sanscontrle spcifiqueFormstcke zum Einschweien - Teil 3: Nich
6、trostendeaustenitische und austenitisch-ferritische (Duplex-) Sthleohne besondere PrfanforderungenThis 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 EuropeanStandard th
7、e status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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
8、). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republ
9、ic, Denmark, Estonia, 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 STANDARDIZATIONCOMIT EUROPEN DE NORMA
10、LISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10253-3:2008: EBS EN 10253-3:2008EN 10253-3:2008 (E) 2 Contents Page Foreword4 Introduc
11、tion .6 1 Scope 7 2 Normative references 7 3 Terms, definitions and symbols.9 3.1 Terms and definitions .9 3.2 Symbols 9 4 Classification of grades and designation .10 4.1 Classification of grades 10 4.2 Designation 11 5 Information to be obtained from the purchaser .11 5.1 Mandatory information11 5
12、.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 .13 6.1 Steelmaking process.13 6.2 Product making process for fittings and heat treatment.13 6.2.1
13、 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 analysis 15 7.3 Weldability15 7.4 Mechanical properties at room temperature.19 7.5 Corrosion resistance.23 7.6 Appearance and internal soundness.23 7.6.1 Appe
14、arance 23 7.6.2 Internal soundness23 7.7 Dimensions and tolerances 24 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 Inspection .31 8.1 Inspection documents.31 8.1.1 Types of inspection documents.31 8.1.2 Content of
15、 inspection documents31 8.2 Summary of inspection and testing.31 9 Sampling.32 BS EN 10253-3:2008EN 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
16、on the base material.33 9.2.3 Test piece for the tensile test on the weld33 9.2.4 Test piece 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
17、.2 At elevated temperature34 10.3 Transverse tensile test on the weld.34 10.4 Weld bend test .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
18、 10.10 Leak tightness test 35 10.11 Optional tests.36 11 Marking.36 11.1 Marking to be applied36 12 Handling and packaging.37 Annex A (normative) Structural dimensions of fittings 38 Annex B (informative) Commonly used inside diameters and wall thicknesses, metric sizes 45 Bibliography47 BS EN 10253
19、-3:2008EN 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, either by publicati
20、on 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 general use and without
21、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-ferritic (duplex) stainle
22、ss 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 stainless steels, and deci
23、ded 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 two types of fitt
24、ings : 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 fittings showing incre
25、ased 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 further interpretation g
26、uidelines (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 provide a basic typ
27、e 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 applications according to
28、 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 fittings is given
29、 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 all be taken into co
30、nsideration. 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. BS EN 10253-3:2008EN 10253-3:2008 (E) 5 Attention is drawn to the possibility that some
31、 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imple
32、ment this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland
33、and the United Kingdom. BS EN 10253-3:2008EN 10253-3:2008 (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 i
34、s given in Table 3. CEN takes no position concerning the 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
35、world. In this respect, the statements of the holders 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
36、 than those indicated above. CEN shall not be responsible for identifying any or all such patents rights. BS EN 10253-3:2008EN 10253-3:2008 (E) 7 1 Scope 1.1 This part of EN 10253 specifies the technical delivery requirements for seamless and welded butt-welding fittings (elbows, concentric and ecce
37、ntric 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; requirements for inspection and testing; inspection documents; mar
38、king; 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 regulations, codes and standards. In common, joint coefficient is used
39、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 other than visual inspection: 0,7. 1.3 Unless otherwise specifi
40、ed 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 edition cited applies. For undated references, the latest editi
41、on 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 procedure specification Part 1: Arc welding (ISO 15609-1:2004)
42、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 materials EN 10002-1, Metallic materials Tensile testing Part 1: M
43、ethod of test at ambient temperature BS EN 10253-3:2008EN 10253-3:2008 (E) 8 EN 10002-5, Metallic materials Tensile testing Part 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
44、 products EN 10027-1, Designation systems for steel Part 1: Steel names EN 10027-2, Designation systems for steel Part 2: Numerical 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 1007
45、9:2007, Definition of steel products EN 10088-2, Stainless steels Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10088-3, Stainless steels Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sectio
46、ns 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 P
47、art 5: Stainless steel tubes EN 10217-7, Welded steel tubes for pressure purposes Technical delivery conditions Part 7: Stainless steel tubes EN ISO 8493, Metallic materials Tubes Drift-expanding test (ISO 8493:1998) EN ISO 8495, Metallic materials Tubes Ring expanding test (ISO 8495:1998) EN 10266,
48、 Steel tubes, fittings and structural hollow sections Symbols and definitions of terms for use in product standards EN 10272, Stainless steel bars for pressure purposes EN 10296-2, Welded circular steel tubes for mechanical and general engineering purposes Technical delivery conditions Part 2: Stain
49、less steel EN 10297-2, Seamless steel tubes for mechanical and general engineering purposes Technical delivery conditions Part 2: Stainless steel EN 13445-3, Unfired pressure vessels Part 1: Design EN 13480-1, Metallic industrial piping Part 1: General EN ISO 377, Steel and steel products Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 2566-2, Steel Conversion of elongation values Part 2: Austenitic steels (ISO 2566-2:1984) EN ISO 31
