1、BRITISH STANDARDBS EN 10253-4:2008Butt-welding pipe fittings Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirementsICS 23.040.40; 77.140.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g
2、59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58IncorporatingcorrigendumMay 2009 National forewordThis British Standard is the UK implementation of EN 10253-4:2008, incorporating corrigendum May 2009. It partially suppersedes BS 1640-2: 1962 and BS
3、1640-4:1968, which are withdrawn.The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by CEN corrigendum May 2009 is indicated in the text by 0 .The UK participation in its preparation was entrusted to Technical Committee ISE/19, Pipe fitti
4、ngs (other than cast iron).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
5、 cannot confer immunity from legal obligations. BS EN 10253-4:2008Amendments/corrigenda issued since publicationDate Comments 31 August 2009 Implementation of CEN corrigendum May 2009This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 20
6、08 BSI 2009ISBN 978 0 580 67924 7EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10253-4March 2008ICS 23.040.40; 77.140.20English VersionButt-welding pipe fittings - Part 4: Wrought austenitic andaustenitic-ferritic (duplex) stainless steels with specificinspection requirementsRaccords souder bout
7、 bout - Partie 4: Aciersinoxydables austnitiques et austno-ferritiques aveccontrle spcifiqueFormstcke zum Einschweien - Teil 4: Austenitische undaustenitisch-ferritische (Duplex-)Sthle mit besonderenPrfanforderungenThis European Standard was approved by CEN on 5 January 2008.CEN members are bound to
8、 comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the 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 Mana
9、gement 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as th
10、eofficial versions.CEN members are the national standards bodies of 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,
11、Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES 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
12、national Members.Ref. No. EN 10253-4:2008: EIncorporating corrigendum May 2009EN 10253-4:2008 (E) 2 Contents Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .7 4 Symbols 8 5 Classification of grades and designation .9 6 Information to be supplied by the purchaser
13、 .9 7 Resistance to internal pressure .12 8 Manufacturing process .12 9 Technical requirements 14 10 Appearance and internal soundness.22 11 Dimensions and tolerances 23 12 Inspection .31 13 Sampling.33 14 Test methods35 15 Marking .38 16 Handling and packaging .38 Annex A (normative) Structural dim
14、ensions of fittings.39 Annex B (normative) Determination of pressure factors and wall thickness46 Annex C (normative) 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 Stan
15、dard and the Essential Requirements of the EU Directive 97/23/EC96 Bibliography 97 BS EN 10253-4:2008EN 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 held by UNI
16、/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 possibili
17、ty 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 Trade Assoc
18、iation, 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: Wrought
19、 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 austeniti
20、c 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 between two
21、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 dimensions. Typ
22、e 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 Directive an
23、d 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 recognized the n
24、eed 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 I IV exc
25、ept applications according to Article 3 Paragraph 3. Information about structural dimensions of fittings is given in Annex A. For fittings specified in accordance with this part of EN 10253, the resistance to internal pressure of the fitting may be determined by calculation. Annex B gives informatio
26、n about the calculation. For some wall thickness series Annex C lists pressure factors for fittings type A and Annex D lists wall thickness values for the body of the fittings of fittings type B. BS EN 10253-4:2008EN 10253-4:2008 (E) 4 According to the CEN/CENELEC Internal Regulations, the national
27、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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Polan
28、d, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Introduction The European Committee for Standardisation (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, t
29、he compositions of which is 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 they are willing to negotiate licences, under reasonable and non-discriminatory terms and conditions, with ap
30、plicants throughout the 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 subjec
31、t of patent rights other than those indicated above. CEN shall not be responsible for identifying any or all such patents rights. BS EN 10253-4:2008EN 10253-4:2008 (E) 5 1 Scope 1.1 This European Standard specifies the technical delivery requirements for seamless and welded butt-welding fittings (el
32、bows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and austenitic-ferritic (duplex) stainless steel which are intended for pressure and corrosion resisting purposes at room temperature, at low temperature or at elevated temperatures. It specifies: the type of
33、fittings; type A (see 7.2) type B (see 7.3) the steel grades; the mechanical properties; the dimensions and tolerances; the requirements for inspection and testing; the inspection documents; the marking; the handling and packaging. NOTE In the case of a harmonised supporting standard for materials,
34、presumption of conformity to the Essential Requirement(s) (ESRs) is limited to technical data of materials in the standard and does not presume adequacy of the material to a specific item of equipment. Consequently the technical data stated in the material standard should be assessed against the des
35、ign requirements of this specific item of equipment to verify that the ESRs of the Pressure Equipment Directive (PED) are satisfied. 1.2 Unless otherwise specified in this European Standard the general technical delivery requirements in EN 10021 apply. 2 Normative references The following referenced
36、 documents are indispensable for the application of this document. For dated references, only the edition 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
37、 EN 473, Non destructive testing - Qualification and certification of NDT personnel - General principles EN 910, Destructive tests on welds in metallic materials Bend test EN 1418, Welding personnel - Approval testing of welding operators for fusion welding and resistance weld setters for fully mech
38、anized and automatic welding of metallic materials EN 10002-1, Metallic materials - Tensile testing - Part 1: Method of test at ambient temperature BS EN 10253-4:2008EN 10253-4:2008 (E) 6 EN 10002-5, Metallic materials - Tensile testing - Part 5: Method of testing at elevated temperature EN 10021:20
39、06, General technical delivery conditions for steel products EN 10027-1, Designation systems for steels - Part 1: Steel names EN 10027-2, Designation systems for steels - Part 2: Numerical system EN 10028-7, Flat products made of steels for pressure purposes - Part 7: Stainless steels EN 10045-1, Me
40、tallic materials Charpy impact test - Part 1: Test method EN 10088-2, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10168, Steel products - Inspection documents - List of information and description EN 10204,
41、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, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes EN 10266:2003
42、,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 13445-3, Unfired pressure vessels - Part 3: Design EN 13480-3:2002, Metallic industrial piping - Part 3: Design and calculatio
43、n EN ISO 377:1997, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 1127, Stainless steel tubes - Dimensions, tolerances and conventional masses per unit length (ISO 1127:1992) EN ISO 3166-1, Codes for the representation of n
44、ames of countries and their subdivisions - Part 1: Country codes (ISO 3166-1:2006) EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels - Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels - Corrosion test in media containing sulfuric
45、acid (ISO 3651-2:1998) EN ISO 6708, Pipework components - Definition and selection of DN (nominal size) (ISO 6708:1995) EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996) EN ISO 15614-1, Specification and qualification of
46、 welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004) BS EN 10253-4:2008EN 10253-4:2008 (E) 7 3 Terms and definitions For the purposes of this document, the relevant definitions given
47、 in EN 10020:2000, EN 10021:2006, EN 10052:1993, EN 10079:2007 and EN ISO 377:1997 apply, except as defined below. 3.1 model for elbows and return bend, the model defines the bending radius of the piece 3.2 welded fitting 3.2.1 fittings made from welded tubes 3.2.2 fittings made from sheet/plate or
48、strip where welding is a part of the manufacturing process 3.3 seamless fitting fittings manufactured without welding from starting material which is not welded 3.4 purchaser person or organisation that orders products in accordance with this European Standard. NOTE The purchaser is not necessarily,
49、 but may be, a manufacturer of pressure equipment in accordance with the EU Directive listed in Annex ZA. Where a purchaser has responsibilities under this EU Directive, this standard will provide a presumption of conformity with the essential requirements of the Directive so identified in Annex ZA 3.5 employer organisation for which a person works on a regular basis. NOTE The employer may be either the fitting manufacturer or supplier or a third party organisation providing a service, e.g. NDT BS EN 10253-4:2008EN 10253-4:20
