1、May 2012 Translation by DIN-Sprachendienst.English price group 11No part of this translation 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 25
2、.160.40!$|$“1890193www.din.deDDIN EN 1708-3Welding Basic weld joint details in steel Part 3: Clad, buttered and lined pressurized componentsEnglish translation of DIN EN 1708-3:2012-05Schweien Verbindungselemente beim Schweien von Stahl Teil 3: Plattierungen, Pufferungen, Auskleidungen druckbeanspru
3、chter BauteileEnglische bersetzung von DIN EN 1708-3:2012-05Soudage Descriptif de base des assemblages souds en acier Partie 3: Composants plaqus, beurrs et doubls soumis la pressionTraduction anglaise de DIN EN 1708-3:2012-05www.beuth.deDocument comprises 20 pagesIn case of doubt, the German-langua
4、ge original shall be considered authoritative.03.12 DIN EN 1708-3:2012-05 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 121 “Welding” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was th
5、e Normenausschuss Schweien und verwandte Verfahren (Welding and allied processes Standards Committee), Working Committee NA 092-00-04 AA Qualittssicherung beim Schweien (DVS AG Q 2). The DIN Standards corresponding to the European/International Standards referred to in this document are as follows:
6、CEN ISO/TR 15608 DIN-Fachbericht CEN ISO/TR 15608 CEN ISO/TR 20172 DIN SPEC 1097 ISO/TR 25901:2007 DIN-Fachbericht ISO/TR 25901:2008 National Annex NA (informative) Bibliography DIN-Fachbericht CEN ISO/TR 15608, Welding Guidelines for a metallic materials grouping system DIN-Fachbericht ISO/TR 25901
7、:2008, Welding and related processes Vocabulary DIN SPEC 1097, Welding Grouping systems for materials European materials EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1708-3 March 2012 ICS 25.160.40 English Version Welding - Basic weld joint details in steel - Part 3: Clad, buttered and lined
8、 pressurized components Soudage - Descriptif de base des assemblages souds en acier - Partie 3: Composants plaqus, beurrs et doubls soumis la pression Schweien - Verbindungselemente beim Schweien von Stahl - Teil 3: Plattierungen, Pufferungen, Auskleidungen druckbeanspruchter Bauteile This European
9、Standard was approved by CEN on 28 January 2012. CEN members are bound to comply with the CEN/CENELEC 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 bibliographical references concer
10、ning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into
11、 its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irelan
12、d, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Ma
13、rnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1708-3:2012: EEN 1708-3:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .54 Requirements .54.1 General 54.2 D
14、issimilar metal joints .54.3 Welds for clad steel .64.4 Weld design examples 6Bibliography . 18Tables Table 1 Clad steels. 6Table 2 Linings 8Table 3 Dissimilar metal joints 11Table 4 Complex connections . 14DIN EN 1708-3:2012-05 EN 1708-3:2012 (E) 3 Foreword This document (EN 1708-3:2012) has been p
15、repared by Technical Committee CEN/TC 121 “Welding”, the secretariat of which is held by DIN. 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 2012, and conflicting national standards sha
16、ll be withdrawn at the latest by September 2012. 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. EN 1708, Welding - Basic weld joint d
17、etails in steel consists of the following parts : Part 1: Pressurized components Part 2: Non internal pressurized components Part 3: Clad, buttered and lined pressurized components According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
18、bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spai
19、n, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1708-3:2012-05 EN 1708-3:2012 (E) 4 1 Scope This European Standard complements EN 1708-1 with regard to applications in industrial, chemical and pharmaceutical sectors. It specifies established examples on how to construct claddings, lini
20、ngs and dissimilar joints and complex connections relevant to the welding technology and with regard to pressurized components (e.g. vessels, boilers and piping). In the following text therefore the term pressurized components will be used. These examples can also be used for other applications prov
21、ided the relevant requirements are taken into account. For exceptional cases such as specific problems concerning corrosion or materials in need of special processes, other solutions can be necessary which are to be agreed upon between purchaser and manufacturer. Appropriate national regulations and
22、 corresponding design specifications are to be followed when selecting design examples as well as, if applicable, different or further requirements. This European Standard does not override conditions on dimensioning of welded joints regarding strength (e.g. according to EN 12952, EN 12953, EN 13445
23、 and EN 13480). It is to be applied in accordance with the specified application limits for pressurized components subject to compression stress with bearing wall thicknesses 30 mm. This limit is chosen for structural reasons and not for the heat treatment that may be required. The wall thickness li
24、mit applies to butt welds in the bearing vessel wall only and does not apply to flanges, torispherical heads, flat ends or other similar parts. This European Standard applies to the following types of steel: non alloyed steels with a minimum tensile strength of Rm 450 MPa; P295GH and 16Mo3 according
25、 to EN 10028-2; fine-grain steels according to EN 10028-3 with a minimum yield point ReL 355 MPa; austenitic steels according to EN 10028-7. This European Standard can also be applied to other steels and/or larger wall thicknesses, provided that an agreement has been made between the manufacturer an
26、d the purchaser/operating authority. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the ref
27、erenced document (including any amendments) applies. EN 1011-5, Welding Recommendations for welding of metallic materials Part 5: Welding of clad steel EN 1708-1:2010, Welding Basic welded joint details in steel Part 1: Pressurized components EN 10028-2, Flat products made of steels for pressure pur
28、poses 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 10028-7, Flat products made of steels for pressure purposes Part 7: Stainless steels ISO/TR 25901:2
29、007, Welding and related processes Vocabulary DIN EN 1708-3:2012-05 EN 1708-3:2012 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/TR 25901:2007 and the following apply. 3.1 heterogeneous joint welded joint in which the weld metal and parent ma
30、terial have significant differences in mechanical properties and/or chemical composition SOURCE: ISO/TR 25901:2007, 2.180 3.2 homogeneous joint Welded joint in which the weld metal and parent material have no significant differences in mechanical properties and/or chemical composition SOURCE: ISO/TR
31、 25901:2007, 2.186 3.3 lining metallic stratum (e. g. sheet, plate, tube or stripe) partly connected to the inner surface of a component 4 Requirements 4.1 General The examples in Table 1 to Table 4 are based on commonly accepted practice and give general information for design conditions and weldin
32、g procedures. Other welding or design conditions should be included in the welding procedure specification (WPS) and have to be specified. NOTE Metallic materials are assigned to groups in Welding Guidelines. Specifications of this grouping system are defined by the Technical Report CEN ISO/TR 15608
33、. For European material designations the material groups with the corresponding material designations or material numbers and the technical delivery conditions can be found in the Technical Report CEN ISO/TR 20172. In many industrial sectors, in particular corrosion resistance shall also be guarante
34、ed for pressurized components. The selection of appropriate materials and their use in established wall thicknesses or designs thus plays an important role. Knowledge gained through experience has been pivotal regarding the material types and wall thickness ranges mentioned above for applications wi
35、th design elements described in this European Standard. 4.2 Dissimilar metal joints Regarding the welding of non alloy steels to austenitic steels, the filler metals to be chosen are determined by one of the following cases: a) If the weld is not post weld heat-treated and the operating temperature
36、300 C throughout, then austenitic filler metals which have been tested for suitability can be chosen. b) If the weld is post weld heat-treated and/or subject to operating temperatures 300 C, then filler metals which have been tested for suitability, such as nickel-based high alloys or other metals,
37、can be used. Strength values of the filler metals which differ from that of the base material may need to be taken into account during calculations. DIN EN 1708-3:2012-05 EN 1708-3:2012 (E) 6 4.3 Welds for clad steel EN 1011-5 is applicable to the welding of clad steel. Care shall be taken concernin
38、g the suitability of filler metals used when welding the butter positions. If a post-weld heat treatment is planned, or if the weld is to be applied at operating temperatures 300 C, then particular specifications are required. The welding consumables for buttering can also be applied beyond the fill
39、ing run, even for final runs, if the corrosion resistance is known to be sufficient. In general, the weld surface of the buttering does not need to be machined. Special surface conditions (such as grinded or polished) shall be specified in the manufacturing documents. 4.4 Weld design examples Exampl
40、es of weld design are given in Tables 1 through 4. Table 1 Clad steels 1 Clad connections Observe the supplementary design rules according to No 3.1 and No 3.2 in Table 3. The thickness of austenitic cladding tpis in general 2 mm to 4 mm. The proportion of austenitic weld metal in the bearing cross-
41、section has to be taken into account for the calculation according to the calculation rules. Differences in wall thickness are to be compensated on the base material side. NOTE The adhesion quality of the cladding should be checked by ultrasonic test (UT) prior to welding. No Figure Application Cond
42、ition Comment 1.1 For fixing on a clad surface (e.g. bearing rings, apex seals) a tpAgreement with purchaser required for low exposure level to stress. DIN EN 1708-3:2012-05 EN 1708-3:2012 (E) 7 Table 1 (continued) No Figure Application Condition Comment 1.2 For local introduction of greater strengt
43、hs (e. g. brackets for flow breakers) a1 tp a2 t2 0,7R 10 mm t2 4 mm f t1, however 20 mm at a minimum DIN EN 1708-3:2012-05 EN 1708-3:2012 (E) 8 Table 2 Linings 2 Welds and connections for linings Observe the supplementary design rules according to No 3.1 and No 3.2 in Table 3. In case of vacuum str
44、esses, the calculation for the bearing capacity of the lining has to be checked separately; thermal stresses is to be taken into account as well. As a rule the lining thickness tlshould be 2 mm as a minimum. When selecting the lining thickness and the weld strip thickness, the root penetration depth
45、 and the welding sensitivity of the carrier material, if applicable, have to be taken into account dependent on the welding procedure and the welds. Cavities between ferritic base metal and austenitic liner shall be avoided for elevated temperature applications. M is a heterogeneous joint between th
46、e ferritic base metal and an austenitic liner V is a homogeneous joint between two austenitic liners. Proceed accordingly with casings. No Figure Application Condition Comment 2.1 tI 3 mm l 3 tl, however 5 mm at a minimum 2.2 tl 3 mm b 20 mm l 3 tl,however 5 mm at a minimum 2.3 For a low exposure le
47、vel to corrosion. Do not remove the excess weld metal tl50 t1 4,0 mm Melt-throughs, even locally limited, are not permissible. The specified minimum wall thicknesses and the thicknesses of butter positions are stipulated in respect of manual metal arc welding and TIG welding. If other welding proces
48、ses are to be applied, separate conditions have to be stipulated depending on the case. M is a heterogeneous joint between the ferritic base metal and an austenitic liner. DIN EN 1708-3:2012-05 EN 1708-3:2012 (E) 12 Table 3 (continued) No Figure Application Condition Comment 3.1 For fixings to austenitic wall t1 4 mm a = 0,5 t11 product side t1tl1tl1see welded connection No. 3.1 tl2 4 mm (finished state) f 3 mm Design supporti
