1、September 2008DEUTSCHE NORM English price group 32No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.040.40; 77.140.20
2、; 77.140.45!$QrI“1467938www.din.deDDIN EN 10253-2Butt-welding pipe fittings Part 2: Non alloy and ferritic alloy steels with specific inspectionrequirementsEnglish version of DIN EN 10253-2:2008-09Formstcke zum Einschweien Teil 2: Unlegierte und legierte ferritische Sthle mit besonderen Prfanforderu
3、ngenEnglische Fassung DIN EN 10253-2:2008-09SupersedesDIN EN 10253-2:2008-04www.beuth.deDocument comprises 127 pagesDIN EN 10253-2:2008-09 2 National foreword This standard has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes” (Secretariat: UNI/UNSIDER, Ital
4、y). The responsible German body involved in its preparation was the Normenausschuss Rohrleitungen und Dampfkesselanlagen (Pipelines and Pressure Vessels Standards Committee), Technical Committee NA 082-00-11 AA Einschweifittings. Amendments This standard differs from DIN 2605-1:1991-02, DIN 2605-2:1
5、995-06, DIN 2609:1991-02, DIN 2615-1:1992-05, DIN 2615-2:1992-05, DIN 2616-1:1991-02, DIN 2616-2:1991-02 and DIN 2617:1991-02 as follows: a) The specifications are now combined under the same standard number. b) The present standard deals with fittings made of carbon and alloy steel. Compared with D
6、IN EN 10253-2:2008-04, the following corrections have been made to the German version only: a) In Table 18, columns 3 and 4, lines 3, 6 and 7 have been moved by one line. b) Subclause 11.3, first paragraph: the value 20 mm has been replaced by 22 mm. c) Previous editions DIN 2605: 1953-11, 1962-09 D
7、IN 2605-1: 1991-02 DIN 2605-2: 1991-02, 1995-06 DIN 2606: 1965-07 DIN 2609: 1991-02 DIN 2615: 1964-06 DIN 2615-1: 1992-05 DIN 2615-2: 1992-05 DIN 2616: 1964-06 DIN 2616-1: 1991-02 DIN 2616-2: 1991-02 DIN 2617: 1964-06, 1991-02 DIN EN 10253-2: 2008-04 In Table 20, columns 2 and 3, all lines from line
8、 6 have been moved up. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10253-2October 2007ICS 77.140.45; 23.040.40English VersionButt-welding pipe fittings - Part 2: Non alloy and ferritic alloysteels with specific inspection requirementsRaccords souder bout bout - Partie 2: Aciers non alliset aci
9、ers ferritiques allis avec contrle spcifiqueFormstcke zum Einschweien - Teil 2: Unlegierte undlegierte ferritische Sthle mit besonderenPrfanforderungenThis European Standard was approved by CEN on 18 August 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat
10、e 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
11、 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
12、 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
13、 COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10253-2:2007: EEN 10253-2:2007 (E)
14、Contents Foreword4 1 Scope 5 2 Normative references 5 3 Terms and definitions .7 4 Symbols 9 5 Designations 10 5.1 Designation of steel grades10 5.2 Designation of fittings.10 6 Information to be supplied by the purchaser .10 6.1 Mandatory information10 6.2 Options .11 6.3 Examples of an order 12 7
15、Resistance to internal pressure .12 7.1 General12 7.2 Fittings of type A12 7.3 Fittings of type B13 8 Manufacturing process .13 8.1 Steelmaking process.13 8.2 Product making process for fittings and heat treatment.13 9 Technical requirements 17 9.1 General17 9.2 Chemical composition 17 9.3 Mechanica
16、l properties.19 9.4 Weldability24 10 Appearance and internal soundness.24 11 Dimensions and tolerances 25 11.1 Dimensions.25 11.2 Dimensional tolerances 39 11.3 End finishing 43 12 Inspection .44 12.1 Type of inspection .44 12.2 Inspection documents.44 12.3 Summary of inspection and testing.45 13 Sa
17、mpling.46 2 PageDIN EN 10253-2:2008-09 EN 10253-2:2007 (E) 13.1 Frequency of tests.46 13.2 Preparation of samples and test pieces47 14 Test methods .48 14.1 Chemical analysis .48 14.2 Tensile test on the base material.49 14.3 Transverse tensile test on the weld.49 14.4 Hardness test.49 14.5 Weld ben
18、d test .49 14.6 Impact testing 49 14.7 Dimensional testing 50 14.8 Visual inspection.50 14.9 Non destructive testing.50 14.10 Material identification53 15 Marking.53 15.1 Marking to be applied53 15.2 Methods54 16 Protection and packaging 54 3DIN EN 10253-2:2008-09 Requirements of EU Directive 97/23/
19、EC123 Bibliography125 Annex ZA (informative) Relationship between this European Standard and the Essential Annex A (informative) Determination of pressure factors and wall thickness.55 Annex B (informative) Pressure factor tables for Fittings of type A79 Annex C (informative) Wall thickness tables f
20、or Fittings of type B .97 Annex D (informative) Recommended heat treatment temperatures 122 EN 10253-2:2007 (E) Foreword This document (EN 10253-2:2007) has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes”, the secretariat of which is held by UNI/UNSIDER. T
21、his 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 2008, and conflicting national standards shall be withdrawn at the latest by May 2008. This document has been prepared under a mandate given to C
22、EN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive (97/23/EC). For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document. EN 10253 comprises a series of European Standards about But
23、t-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 specifi
24、c inspection requirements Part 4 : Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements In writing this European Standard the competent committee recognized that there are two broad types of products commonly used, and decided to reflect these in
25、 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
26、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
27、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. guideli
28、ne 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 selection of steel type and requirement level depend on many factors; the p
29、roperties 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 t
30、he appropriate part for the intended application. 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 Interna
31、l 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
32、, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. 4DIN EN 10253-2:2008-09 EN 10253-2:2007 (E) 1 Scope This Part of EN 10253 specifies the technical delivery requirements for seamless and welded butt-welding fittings (elbows, conc
33、entric and eccentric reducers, equal and reducing tees, caps) made of carbon and alloy steel which are intended for pressure purposes at room temperature, at low temperature or at elevated temperatures, and for the transmission and distribution of fluids and gases. It specifies: type of fittings ; t
34、ype A : Butt-welding fittings with reduced pressure factor ; type B : Butt-welding fittings for use at full service pressure ; steel grades ; mechanical properties ; dimensions and tolerances ; requirements for inspection and testing ; inspection documents ; marking ; protection and packaging. NOTE
35、In the case of a harmonised supporting standard for materials, presumption of conformity to the 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 it is essential that the technical data stated in
36、 the material standard be assessed against the design requirements of this specific item of equipment to verify that the ESRs of the PED are satisfied. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edi
37、tion 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 910, Destructive tests on welds in metallic materials Bend tests EN 1418, Welding personnel Approval
38、testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials EN 100021, Metallic materials Tensile testing Part 1: Method of test at ambient temperature EN 100025, Metallic materials Tensile testing Part 5: Method of tes
39、ting at elevated temperature EN 10020:2000, Definition and classification of grades of steel EN 10021:2006, General technical delivery conditions for steel products 5DIN EN 10253-2:2008-09 EN 10253-2:2007 (E) EN 10027-1, Designation systems for steels Part 1: Steel names EN 10027-2, Designation syst
40、ems for steels Part 2: Numerical system EN 10028-2, Flat products made of steels for pressure purposes Part 2: Non-alloy and alloy steels with specified elevated temperature properties EN 10028-3, Flat products made of steels for pressure purposes Part 3: Weldable fine grain steels, normalized EN 10
41、028-4, Flat products made of steels for pressure purposes Part 4: Nickel alloy steels with specified low temperature properties EN 100451, Metallic materials - Charpy impact test Part 1: Test method EN 10052:1993, Vocabulary of heat treatment terms for ferrous products EN 10168, Steel products Inspe
42、ction documents List of information and description EN 10204, Metallic products Types of inspection documents EN 10217-1, Welded steel tubes for pressure purposes Part 1: Non-alloy steel tubes with specified room temperature properties EN 10217-2, Welded steel tubes for pressure purposes Technical d
43、elivery conditions Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties EN 10217-3, Welded steel tubes for pressure purposes Technical delivery conditions Part 3: Alloy fine grain steel tubes EN 10217-4, Welded steel tubes for pressure purposes Techn
44、ical delivery conditions Part 4: Electric welded non-alloy steel tubes with specified low temperature properties EN 10217-5, Welded steel tubes for pressure purposes Technical delivery conditions Part 5: Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature propert
45、ies EN 10217-6, Welded steel tubes for pressure purposes Technical delivery conditions Part 6: Submerged arc welded non-alloy steel tubes with specified low temperature properties EN 10246-10, Non-destructive testing of steel tubes Part 10: Radiographic testing of the weld seam of automatic fusion a
46、rc welded steel tubes for the detection of imperfections EN 10246-11, Non-destructive testing of steel tubes Part 11: Liquid penetrant testing of seamless and welded steel tubes for the detection of surface imperfections EN 10246-12, Non-destructive testing of steel tubes Part 12: Magnetic particle
47、inspection of seamless and welded ferromagnetic steel tubes for the detection of surface imperfections EN 10266:2003, Steel tubes, fittings and structural hollow sections Symbols and definitions of terms for use in product standards EN 10273, Hot rolled weldable steel bars for pressure purposes with
48、 specified elevated temperature properties EN 13480-3:2002, Metallic industrial piping Part 3: Design and calculation EN ISO 377:1997, Steel and steel products Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) 6DIN EN 10253-2:2008-09 EN 10253-2:2007 (E) EN ISO
49、 2566-1, Steel Conversion of elongation values Part 1: Carbon and low alloy steels (ISO 2566-1:1984). EN ISO 3166-1, Codes for the representation of names of countries and their subdivisions Part 1: Country codes (ISO 3166-1:2006) EN ISO 6708, Pipe work 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 I
