1、BRITISH STANDARDBS EN 10253-2:2007Butt-welding pipe fittings Part 2: Non alloy and ferritic alloy steels with specific inspection requirementsThe European Standard EN 10253-2:2007 has the status of a British StandardICS 23.040.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40
2、g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 10253-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007ISBN 978 0 580 53080 7
3、National forewordThis British Standard is the UK implementation of EN 10253-2:2007. Together with BS EN 10253-1:1999 it supersedes BS 1965-1:1963, which is withdrawn. It partially supersedes BS 1640-1:1962, and BS 1640-3:1968, which will be withdrawn upon publication of BS EN 10253-3 and BS EN 10253
4、-4. The UK participation in its preparation was entrusted to Technical Committee ISE/19, Pipe fittings (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
5、 a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10253-2October 2007ICS 77.140.45; 23.040.40Engli
6、sh VersionButt-welding pipe fittings - Part 2: Non alloy and ferritic alloysteels with specific inspection requirementsRaccords souder bout bout - Partie 2: Aciers non alliset aciers ferritiques allis avec contrle spcifiqueFormstcke zum Einschweien - Teil 2: Unlegierte undlegierte ferritische Sthle
7、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 stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date li
8、sts 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 respo
9、nsibility 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, Icela
10、nd, 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 NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stass
11、art, 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) 2 Contents Foreword4 1 Scope 5 2 Normative references 5 3 Terms and definitions .7 4 Symbols 9 5 Designations 10 5.1 Desi
12、gnation 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 Resistance to internal pressure .12 7.1 General12 7.2 Fittings of type A12 7.3 Fittings of type B13 8 Manufacturing pro
13、cess .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 Mechanical properties.19 9.4 Weldability24 10 Appearance and internal soundness.24 11 Dimensions and tolerances 25 11.1 Dimensio
14、ns.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 Sampling.46 EN 10253-2:2007 (E) 3 13.1 Frequency of tests.46 13.2 Preparation of samples and test pieces47 14 Test method
15、s .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 bend 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 identificat
16、ion53 15 Marking.53 15.1 Marking to be applied53 15.2 Methods54 16 Protection and packaging 54 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 for Fittings
17、of type B .97 Annex D (informative) Recommended heat treatment temperatures 122 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC123 Bibliography125 EN 10253-2:2007 (E) 4 Foreword This document (EN 10253-2:2007) has been prepar
18、ed by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes”, the secretariat of which is held by UNI/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 May 2008, and con
19、flicting national standards shall be withdrawn at the latest by May 2008. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive (97/23/EC). For relationship with EU Directiv
20、e, 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 carbon steel for general use and without specific inspection requirements Part 2 : Non alloy and ferritic alloy steels
21、 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 In writing this European S
22、tandard the competent committee recognized that there are two broad types of products commonly used, 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
23、 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 press
24、ure 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 i
25、n 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, provis
26、ions for seamless and welded fittings are different. 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 sta
27、ndard 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. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
28、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
29、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. EN 10253-2:2007 (E) 5 1 Scope This Part of EN 1
30、0253 specifies the technical delivery requirements for seamless and welded butt-welding fittings (elbows, concentric 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 t
31、emperatures, and for the transmission and distribution of fluids and gases. It specifies: type of fittings ; type 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 tolerance
32、s ; requirements for inspection and testing ; inspection documents ; marking ; protection and packaging. NOTE 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 o
33、f the material to a specific item of equipment. Consequently it is essential that the technical data stated in 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 r
34、eferenced 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: S
35、teels EN 910, Destructive tests on welds in metallic materials Bend tests EN 1418, Welding personnel Approval 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 Par
36、t 1: Method of test at ambient temperature EN 100025, 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 10253-2:2007 (E) 6 EN
37、10027-1, Designation systems for steels Part 1: Steel names EN 10027-2, Designation systems 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 m
38、ade of steels for pressure purposes Part 3: Weldable fine grain steels, normalized EN 10028-4, 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
39、, Vocabulary of heat treatment terms for ferrous products EN 10168, Steel products Inspection 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
40、 temperature properties EN 10217-2, Welded steel tubes for pressure purposes Technical delivery 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:
41、 Alloy fine grain steel tubes EN 10217-4, Welded steel tubes for pressure purposes Technical 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: Submerge
42、d arc welded non-alloy and alloy steel tubes with specified elevated temperature properties 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 tes
43、ting of steel tubes Part 10: Radiographic testing of the weld seam of automatic fusion arc 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 imper
44、fections EN 10246-12, Non-destructive testing of steel tubes Part 12: Magnetic particle 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
45、in product standards EN 10273, Hot rolled weldable steel bars for pressure purposes with 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
46、for mechanical testing (ISO 377:1997) EN 10253-2:2007 (E) 7 EN ISO 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
47、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 ISO 15614-1, Specification and qualification of welding procedures for metal
48、lic materials - Welding procedure test Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004) ISO 1027, Radiographic image quality indicators for non-destructive testing Principles and identification 3 Terms and definitions For the purposes of this docum
49、ent, the relevant definitions in EN 10020:2000, EN 10021:2006, EN 10052:1993 and EN ISO 377:1997 apply, except as defined below. 3.1 carbon steel grade in this part of EN 10253, the following grades : P235TR2 - P265TR2 - P235GH - P265GH - P355N - P355NH - P355NL1 - P215NL - P265NL 3.2 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
