Butt-welding pipe fittings - Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements

This part of EN 10253 specifies the technical delivery requirements for seamless and welded buttwelding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and austenitic - ferritic (duplex) stainless steel without specific inspection requirements. It specifies : - 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. Unless otherwise specified in this part of EN 10253 the general technical delivery requirements in EN 10021 shall apply. 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 are 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 other than visual inspection : 0,7.

Formstücke zum einschweissen - Teil 3: Austenitischen und austenitisch-ferritischen nichtrostenden Stähle ohne besonderen Prüfanforderungen

Dieser Teil der EN 10253 legt die technischen Lieferbedingungen für nahtlose Formstücke zum Einschweißen (Rohrbogen, konzentrische und exzentrische Reduzierstücke, T-Stücke mit gleichem oder mit reduziertem Abzweig, Kappen) aus nichtrostendem austenitischem und austenitisch-ferritischem (Duplex-) Stahl, ohne spezielle Anforderungen an die Prüfung fest.
Diese Norm spezifiziert:
   die Stahlsorten;
   die mechanischen Eigenschaften;
   die Maße und Grenzabmaße;
   die Anforderungen an die Prüfungen;
   die Prüfbescheinigungen;
   die Kennzeichnung;
   die Versandvorbereitung und Verpackung.

Raccords a souder bout a bout - Partie 3: Aciers inoxydables austénitiques et austéno-ferritiques sans contrôle spécifique

La présente partie de l’EN 10253 spécifie les exigences techniques de livraison pour les raccords a souder bout a bout, sans soudure et soudés (coudes, réductions concentriques et excentriques, tés égaux et réduits, caps) en acier inoxydable austénitique et austéno ferritique (duplex), livrés sans contrôle spécifique.
La présente norme spécifie :
   les nuances d'acier ;
   les caractéristiques mécaniques ;
   les dimensions et tolérances ;
   les exigences relatives au contrôle et aux essais ;
   les documents de contrôle ;
   le marquage ;
   la manutention et le conditionnement.
1.2   Falls in diesem Teil der EN 10253 nichts anderes festgelegt ist, gelten die allgemeinen technischen Lieferbedingungen nach EN 10021.
1.3   Anwendungsgrenzen
Die zulässigen Drücke und Temperaturen unterliegen der Verantwortlichkeit des Bestellers gemäß dem Stand der Technik und unter Anwendung der in den geltenden Vorschriften, technischen Regeln oder Normen festgelegten Sicherheitsbeiwerte.
Schweißnahtfaktoren werden allgemein bei der Berechnung der Wanddicken von Bauteilen verwendet, die eine oder mehrere Stumpfnähte aufweisen, die nicht in Umfangsrichtung liegen:
-   bei Bauteilen, von denen Stichproben einer zerstörungsfreien Prüfung unterzogen werden: 0,85
-   bei Bauteilen, die lediglich einer Sichtprüfung unterzogen werden: 0,7.

Cevni fitingi za soležne zvare - 3. del: Kovna avstenitna in avstenitno-feritna (dupleksna) nerjavna jekla brez posebnih zahtev glede pregledov

General Information

Status
Published
Publication Date
23-Dec-2008
Withdrawal Date
05-Apr-2007
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Dec-2008
Due Date
12-Feb-2009
Completion Date
24-Dec-2008

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cevni fitingi za soležne zvare - 3. del: Kovna avstenitna in avstenitno-feritna (dupleksna) nerjavna jekla brez posebnih zahtev glede pregledovFormstücke zum einschweissen - Teil 3: Austenitischen und austenitisch-ferritischen nichtrostenden Stähle ohne besonderen PrüfanforderungenRaccords a souder bout a bout - Partie 3: Aciers inoxydables austénitiques et austéno-ferritiques sans contrôle spécifiqueButt-welding pipe fittings - Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements77.140.20Visokokakovostna jeklaStainless steels23.040.40Kovinski fitingiMetal fittingsICS:Ta slovenski standard je istoveten z:EN 10253-3:2008SIST EN 10253-3:2009en,de01-februar-2009SIST EN 10253-3:2009SLOVENSKI

STANDARD
SIST EN 10253-3:2009

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10253-3November 2008ICS 23.040.40; 77.140.20 English VersionButt-welding pipe fittings - Part 3: Wrought austenitic andaustenitic-ferritic (duplex) stainless steels without specificinspection requirementsRaccords à souder bout à bout - Partie 3: Aciersinoxydables austénitiques et austéno-ferritiques sanscontrôle spécifiqueFormstücke zum Einschweißen - Teil 3: Nichtrostendeaustenitische und austenitisch-ferritische (Duplex-) Stähleohne besondere PrüfanforderungenThis 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 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 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 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 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 and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10253-3:2008: ESIST EN 10253-3:2009

EN 10253-3:2008 (E) 2 Contents Page Foreword..............................................................................................................................................................4 Introduction.........................................................................................................................................................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 information........................................................................................................................11 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.......................................................................................................................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 treatment......................................................................................................................................14 7 Technical requirements......................................................................................................................15 7.1 General..................................................................................................................................................15 7.2 Chemical composition - Cast analysis..............................................................................................15 7.3 Weldability............................................................................................................................................15 7.4 Mechanical properties at room temperature.....................................................................................19 7.5 Corrosion resistance...........................................................................................................................23 7.6 Appearance and internal soundness.................................................................................................23 7.6.1 Appearance..........................................................................................................................................23 7.6.2 Internal soundness..............................................................................................................................23 7.7 Dimensions and tolerances................................................................................................................24 7.7.1 General..................................................................................................................................................24 7.7.2 Dimensions...........................................................................................................................................24 7.7.3 Dimensional tolerances......................................................................................................................28 7.7.4 Performance of the end bevelling......................................................................................................31 7.8 Leak tightness......................................................................................................................................31 8 Inspection.............................................................................................................................................31 8.1 Inspection documents.........................................................................................................................31 8.1.1 Types of inspection documents.........................................................................................................31 8.1.2 Content of inspection documents......................................................................................................31 8.2 Summary of inspection and testing...................................................................................................31 9 Sampling...............................................................................................................................................32 SIST EN 10253-3:2009

EN 10253-3:2008 (E) 3 9.1 Frequency of tests...............................................................................................................................32 9.1.1 Test unit................................................................................................................................................32 9.2 Preparation of samples and test pieces............................................................................................33 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 weld........................................................................................33 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 10.2.2 At elevated temperature......................................................................................................................34 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 identification..........................................................................................................................35 10.10 Leak tightness test..............................................................................................................................35 10.11 Optional tests.......................................................................................................................................36 11 Marking.................................................................................................................................................36 11.1 Marking to be applied..........................................................................................................................36 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 Bibliography......................................................................................................................................................47

SIST EN 10253-3:2009

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, either 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 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 austenitic and austenitic-ferritic (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 stainless 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 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 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 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 recognized 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 (97/23/EC) except applications 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 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 all 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. SIST EN 10253-3:2009

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. According 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

SIST EN 10253-3:2009

EN 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 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 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 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 responsible for identifying any or all such patents rights.

SIST EN 10253-3:2009

EN 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 eccentric reducers, equal and reducing tees, caps) made of austenitic and austenitic–ferritic (duplex) stainless steel without specific inspection requirements. It specifies:  steel grades;  mechanical properties;  dimensions and tolerances;  requirements 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 regulations, 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 other 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 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 EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure 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 materials EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature SIST EN 10253-3:2009

EN 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 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 10079:2007, 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, 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, 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, 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: Stainless 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 3166-1, Codes for the representation of names of countries and their subdivisions — Part 1: Country codes (ISO 3166-1:2006) SIST EN 10253-3:2009

EN 10253-3:2008 (E) 9 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 acid (ISO 3651-2:1998) EN ISO 9001, Quality management systems — Requirements (ISO 9001:2000) EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996) 3 Terms, definitions and symbols 3.1 Terms and definitions For the purpose of this document, the relevant terms and definitions given in EN 10020:2000, EN 10021:2006, EN 10052:1993, EN 10079:2007 and EN ISO 377:1997 apply, except as defined below. 3.1.1 model for elbows and return bends, the model defines the bending radius of the piece 3.1.2 welded fitting fittings made from welded tubes or fittings made from plate/sheet or strip where welding is a part of the manufacturing process 3.1.3 seamless fitting fittings manufactured without welding from starting material which is not welded 3.1.4 purchaser person or organisation that orders products in accordance with this European Standard 3.1.5 employer organisation for which a person works on a regular basis. The employer can be either the fitting manufacturer or supplier or a third party organisation providing a service, e.g. NDT 3.2 Symbols For the purpose of this document, the symbols given in EN 10266 and the following apply. DN, DN1 Conventional dimension used in piping; non measurable value (see EN ISO 6708) D Specified outside diameter for elbows, return ends, equal tees, caps and the major outside diameter for reducers and reducing tees, expressed in millimetres D1 Specified minor outside diameter for reducers and reducing tees, expressed in millimetres T Specified wall thickness at the welding ends for elbows, return bends and equal tees or on the D end for reducers and reducing tees, expressed in millimetres T1 Specified wall thickness on the D1 welding end of reducers and reducing tees, expressed in millimetres SIST EN 10253-3:2009

EN 10253-3:2008 (E) 10 ID Internal diameter at the welding ends of elbows, return bends, equal tees and at the major welding end of reducers and reducing tees (ID = D – 2T) ID1 Internal diameter at the minor welding end of reducers and reducing tees (ID1 = D1 – 2T1) C Centre to centre distance for return bends (C = 2R), expressed in millimetres B Back to face distance for return bends, expressed in millimetres F Distance from the axis of the branch outlet to the face of the centre body of tees, expressed in millimetres G Distance from the axis of the centre line to the face of the branch outlet of reducing tees, expressed in millimetres H Face to centre distance for 45° elbows, expressed in millimetres K Total height for caps, expressed in millimetres L Face to face distance for reducers, expressed in millimetres Q Tolerance on the form of fittings r Inside knuckle radius of cap R Bending radius of elbows and return bends, expressed in millimetres Rm Tensile strength at room temperature, expressed in MPa Rp0,2 Minimum 0,2 % proof strength at room temperature, expressed in MPa Rp1,0 Minimum 1,0 % proof strength at room temperature, expressed in MPa A Percentage of elongation at rupture, with reference to gauge length of 5,65 √ S0 HBW Brinell hardness W0 Welded from hot or cold rolled plate, sheet or strip 1D, 2D, 2E, 2B (symbols of flat products according to EN 10088-2) W1 Welded from hot rolled plate, sheet or strip 1D, descaled W2 Welded from cold rolled plate, sheet or strip 2D, 2E, 2B, descaled 4 Classification of grades and designation 4.1 Classification of grades Steels covered in this European Standard are classified according to their structure into:  austenitic steels;  austenitic–ferritic (duplex) steels. For more details see EN 10088-1. SIST EN 10253-3:2009

EN 10253-3:2008 (E) 11 4.2 Designation For the fittings covered by this European Standard the designation shall consist of: number of this European Standard (EN 10253-3); plus either: steel name in accordance with EN 10027-1; or: steel number allocated in accordance with EN 10027-2. 5 Information to be obtained from the purchaser 5.1 Mandatory information The following information shall be obtained from the purchaser, at the time of enquiry and/or order: 5.1.1 Designation of fittings 5.1.1.1 Elbows and return bends Elbows and return bends are designated by the model (2D, 3D, 5D, D+100 and so on), the angle and the outside diameter D. 5.1.1.2 Reducers Reducers are designated by the model (concentric or eccentric), the major diameter D and the minor diameter D1. 5.1.1.3 Tees Equal tees are designated by the outside diameter D. Reducing tees are designated by the major diameter D and by the minor diameter D1. 5.1.1.4 Caps Caps are designated by the outside diameter D. 5.1.2 Information The following information shall be obtained from the purchaser at the time of enquiry and order: a) quantity required (number of pieces); b) designation of fittings (see 5.1.1) and the wall thickness T (T1); c) designation of the steel grade according to this European Standard; d) reference to this European Standard. SIST EN 10253-3:2009

EN 10253-3:2008 (E) 12 5.2 Options A number of options are specified in this European Standard and these are listed below. In the event that the purchaser does not indicate a wish to implement any of these options at the time of enquiry and order, the fittings shall be supplied in accordance with the basic specification (see 5.1). 1) steelmaking process (see 6.1); 2) heat treatment of the fittings (see 6.2.3.1); 3) additional testing of the fittings shall be agreed at the time of enquiry and order (7.3); 4) agreed mechanical properties for wall thicknesses greater than 60 mm apply (see Table 4); 5) intergranular corrosion test (

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