1、DEUTSCHE NORM November 1999 Butt-welding pipe fittings Part 1: Wrought carbon steel for general use and without specific inspection requirements English version of DIN EN 10253-1 DIN - EN 10253-1 ICs 23.040.40; 77.140.45 Formstcke zum Einschweien -Teil 1 : Unlegierter Stahl fr allgemeine Anwendungen
2、 und ohne besondere Prfanforderungen European Standard EN 10253-1 : 1999 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by ECISS/TC 29. The responsible German body involved in the preparation of this standard was the Normena
3、usschu Rohre, Rohrverbindungen und Rohrleitungen (Pipes, Pipe Joints and Pipelines Standards Committee), Technical Committee Einschwei fittings . EN comprises 32 pages. No pari of this standard may be reproduced without the prior permission of hl Deutsches Institut fr Normung e. V., Berlin. Luth Ver
4、lag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). Ref. No. DIN EN 10253-1 : 1999-1 English pricegroup 13 Sales No. 1113 04.00 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10253-1 September 1999 ICs 23.040.40 English version Butt-welding pipe fitting
5、s Part 1 : Wrought carbon steel for general use and without specific inspection requirements Raccords souder bout bout - Partie 1 : Acier au carbone pour usages gnraux et sans contrle spcifique anforderungen Formstcke zum Einschweien -Teil 1 : Unlegierter Stahl fr allgemeine An- Wendungen und ohne b
6、esondere Prf- This European Standard was approved by CEN on 1999-07-02. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliograph
7、ical references concerning such national stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CE
8、N member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands,
9、 Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1999. CEN - All rights of exploitation in any form and by any mea
10、ns reserved worldwide for CEN national members. Ref. No. EN 10253-1 : 1999 E Page 2 EN 10253-1 : 1999 Contents Foreword 3 1 1.1 1.2 1.3 2 3 3.1 3.2 4 4.1 4.2 4.3 5 5.1 5.2 6 6.1 6.2 6.3 7 7.1 7.2 7.3 8 8.1 8.2 8.3 9 9.1 9.2 9.3 9.4 10 11 scope 4 scope 4 Limitation of use 4 Technical delivery conditi
11、ons . 4 Normative references 4 Definitions and symbols . 5 Def in tions . 5 Symbols 5 Information to be supplied by the purchaser 6 Mandatory information 6 Options 7 Examples 7 Manufacturing process . 8 Steelmaking process . 8 Fitting making-process and heat treatment 8 Chemical composition . 9 Dime
12、nsions and tolerances 10 Tolerances on dimensions 23 Appearance, imperfections and repair 27 Repair 27 Metallurgical properties 9 Mechanical characteristics . 9 Weldability 9 Dimensions . 10 End finishing 25 Appearance . 27 Imperfections 27 Inspection and testing . 28 General 28 Inspection documents
13、 . 28 Summary of inspection and testing . 28 Marking . 29 Inspection and test methods 28 Protection and packaging . 29 Annex A (normative) Alternative specification for all types of fittings . 30 A.l Steel grade 30 A.2 Dimensions . 30 Annex B (informative) A-deviation . 32 Page 3 EN 10253-1 : 1999 F
14、oreword This European Standard 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 endorseme
15、nt, at the latest by March 2000, and conflicting national standards shall be withdrawn at the latest by March 2000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard is considered to be a s
16、upporting standard to those application and product standards which in themselves support an essential safety requirement of a New Approach Directive and which make reference to this European Standard. In writing the European Standard EN 10253, the competent committee recognized that there are two b
17、road types of products commonly used and decided to reflect these in the standard by the differentiation between two parts. Firstly 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 resi
18、stance. This type is considered in Part 1 ; it consists of fittings which are not intended to be used in applications covered by the European Pressure Equipment Directive. Secondly the equipment standards under the Pressure Equipment Directive will impose that the fitting has a defined resistance to
19、 internal pressure. This approach imposes enhanced requirements that are considered in Part 2. Pari 1 : fittings are not designed to fulfil specific design requirements in regard of pressure resistance and are only defined by their chemical composition, mechanical characteristics and dimensions (out
20、side diameter, wall thickness, radius . . .). Pari 2 : fittings are designed to fulfil specific design requirements. It is the ultimate responsibility of the user to select the appropriate part for the intended application. NOTE normative annex an alternative solution for an associated combination o
21、f steel grade and dimensions (see clause 1). This European Standard intends to reflect the needs of various national markets ; consequently it offers in a According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Eu
22、ropean Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 4 EN 10253-1 : 1999 1 Scope 1.1 Scope This European Standard specifies requirement
23、s for steel butt-welding fittings (elbows and return bends, concentric and eccentric reducers, equal and reducing tees, dished ends and caps) made of wrought carbon steel and delivered without specific inspection. The fittings described in this European Standard do not fulfil specific design require
24、ments ; consequently they cannot be considered as conforming to the Essential Requirements of the Pressure Equipment Directive (Directive 97123lEC of 29.05.1 997). It specifies : - the steel grade and its chemical composition : - the mechanical characteristics ; - the dimensions and tolerances : - t
25、he technical conditions for inspection and testing : - the marking, packaging and inspection documents. When steel grade S265 is specified in 4.1.2, the normative annex A applies and takes preference over conflicting requirements in the relevant areas of the main text. Another part of this European
26、Standard (describing fittings intented to fulfil the Essential Requirements of the PED) is : - Butt-welding pipe fittings - Part 2 : Wrought carbon and ferritic alloy steels with specific inspection requirements. 1.2 Limitation of use The allowed pressures and temperatures are the responsibility of
27、the customer according to the state of the art and in application of the safety coefficients specified in the applicable regulations, codes or standards. 1.3 Technical delivery conditions Unless otherwise specified in this European Standard the general technical delivery conditions specified in EN 1
28、0021 apply. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments
29、 to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 287-1, Approval tesfing of welders - Fusion weldng - Part 1 : Steels. EN 208-1 ,
30、Specification and qualification of welding procedures for metallic materials - Part 7 : General rules for fusion welding. EN 1 0002-1, Metallic materials - tensile testing - Part i : Method of test (at ambient temperature). Page 5 EN 10253-1 : 1999 EN 10003-1, Metalic materials - Brinell hardness te
31、sting - Part i : Method of test. EN 1 0020, Definitions and classification of grades of steel. EN 1 0021 , General technical delivery requirements for iron and sted EN 10052, Vocabulary of heat treatment terms for ferrous products. EN 1 0079, Definition of steel products. EN 1 0204, Metallic product
32、s - Types of inspection documents. EN IS0 6708, Pipework components - Definition and selection of DN (nominal size). EN 1 0246-7, Non destructive testing of steel tubes - Part 7: Automatic full perbheral ultrasonic testing of seamless and welded (except submerged arc welded) steel tubes for the dete
33、ction of longituinal imperfections. prEN 1 0246-81, Non destructive testing of steel tubes - Part 8 : Automatic ultrasonic testing of the weld seam of electric welded tubes for the detection of longitudinal imperfections. IS0 31 66, Codes for the representation of names of countries. 3 Definitions a
34、nd symbols 3.1 Definitions For the purpose of this European Standard the definitions in EN 10020, EN 10021, EN 10052 and EN 10079 shall apply. In addition following definitions apply : type For elbows and return bends the type defines the bending radius of the piece. Possible types are - type 2D : R
35、 z 1D ; - type 3D : R z 1,5D : - type 5D : R z 2,5D. welded fitting Fitting made from a welded tube or fitting where welding is part of the fabrication of the fitting. 3.2 Symbols DN Conventional dimension used in piping ; non measurable value (See EN IS0 6708) D Specified outside diameter for elbow
36、s, return bends, equal tees and large diameter for reducers and reducing tees, in millimetres Specified small outside diameter for reducers and reducing tees, in millimetres Dl T Specified wall thickness at the welding ends, in millimetres TI Specified wall thickness at the welding end of the Dl fac
37、e of reducers and reducing tees, in millimetres l) In preparation. Until this document is published as a European Standard, the corresponding national standard should be agreed at the time of enquiry and order. Page 6 EN 10253-1 : 1999 R C B F G h H Ki K2 L Q Rrn ReH A HB Radius of elbows and return
38、 bends, in millimetres Centre to centre distance for return bends (C=2F), in millimetres Face to top distance for return bends, in millimetres Distance from the axis of the branch outlet to the face of the centre body of tees, in millimetres Distance from the axis of the centre line to the face of t
39、he branch outlet of reducingtees, in millimetres Height of the straight part of dished ends, in millimetres Face to centre distance for 45“ elbows, in millimetres Internal height for dished ends, in millimetres Total height for caps, in millimetres Face to face distance for reducers, in millimetres
40、Tolerance on the form for fittings Tensile strength at room temperature, in Newton per square millimetre Upper yield limit at room temperature, in Newton per square millimetre Percentage of elongation at rupture, with reference to a gauge length of 5,65 - for return bends : The type (2D, 3D or 5D),
41、the outside diameter D and the wall thickness T ; - reducers : - the form (1 or 2), the large diameter D and the wall thickness T, the small diameter Dl and the wall thickness TI. - The form does not apply for eccentric reducers ; Page 7 EN 10253-1 : 1999 - tees - for equal tees : The outside diamet
42、er D and the wall thickness T ; - for reducing tees : The large diameter D and the wall thickness T, the small diameter Dl and the wall thickness TI ; - dishedends - the outside diameter D and the wall thickness T ; - caps : - the outside diameter D and the wall thickness T. 4.1.2 The enquiry and or
43、der shall include following information : - quantity; - designation of fittings ; - steel grade (see clause 6 and annex A) ; - reference to this European Standard. 4.2 Options A number of options are specified in this European Standard and these are listed below. In the event that the purchaser does
44、 not indicate his wish to implement any of these options at the time of enquiry and order, the supplier shall supply in accordance with the basic specification : - type of tube as starting product (seamless or welded). See 5.2.1 ; - definition of coating. See clause 1 1. 4.3 Examples EXAMPLE 1 : 100
45、0 elbows in accordance with this European Standard of type 3D with angle 90“ and dimensions 60,3 X 2,9 made of steel grade S235. 1 O00 elbows - EN 10253-1 - type 3D - 90“ - 60,3 X 2,9 - S235. EXAMPLE 2 50 elbows in accordance with this European Standard of type 30 with angle 90“ and dimensions 273 X
46、 9,5 made of steel grade S265. 50 elbows - EN 10253-1 - type 3D - 90“ - 273 X 9,5 - S265. EXAMPLE 3 : 2 O00 concentric reducers in accordance with this European Standard of form 2 with dimensions 219,l X 6,3 - 139,7 X 4,O made of steel grade S235. 2 O00 concentric reducers - EN 10253-1 - form 2 - 21
47、9,l X 6,3 - 139,7 X 4,O - S235. Page 8 EN 10253-1 : 1999 5 Manufacturing process 5.1 Steelmaking process The steelmaking process of the base material is at the discretion of the manufacturer. The steels shall be fully killed. 5.2 Fitting making-process and heat treatment 5.2.1 Fitting-making process
48、es The allowed processes and the relevant starting products are given in Table 1. Hot Deformation Process for Bending Stamping or fittings Forming followed by machining Elbows 1-2 1 -2-3 Return Bends Reducers 1-2-3 Tees 1 -2-3-4-5 Dished ends and 3-5 caps Cold Deformation Bending Stamping b Forming
49、b 1-2 1-2-3 1-2-3 1-2-3 1-2-3 1-2-3 1-2-3 1-2-3 3 The process is at the discretion of the manufacturer. Where tubes are used as starting material, the following conditions apply : - the choice of the type of tubes (seamless or welded) is left at the discretion of the manufacturer ; - helical submerged arc welded (SAW) tubes are not permitted ; - for welded tubes, the full length of the weld seam shall be nondestructively tested in the tube condition in accordance with EN 10246-7 or prEN 10246-8, to acceptance level L4. Option 1 The type of starting product shall be
