SIST EN 1708-3:2012

Welding - Basic weld joint details in steel - Part 3: Clad, buttered and lined pressurized components

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 platings, linings and heterogeneous 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 vessels will be used for pressurized components.
These examples can also be used for other applications provided 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 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 and EN 13480). It is to be applied in accordance with the specified application limits for pressure vessels and apparatus 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 limit applies to butt welds in the bearing vessel wall only and does not apply to flanges, pipe bases, level bases or other similar vessel components.
This European Standard applies to the following types of steel:
-   unalloyed steels with minimum tensile strengths of Rm <= 450 MPa;
-   P295GH and 16Mo3 according to EN 10028-2;
-   fine-grained steels according to EN 10028-3 with a minimum yield point ReL <= 355 MPa;
-   austenitic steels according to EN 10028-7.
(...)

Schweißen - Verbindungselemente beim Schweißen von Stahl - Teil 3: Plattierungen, Pufferungen, Auskleidungen druckbeanspruchter Bauteile

Diese Europäische Norm gilt ergänzend zu EN 1708-1. Sie ist zur Anwendung im gewerblichen, chemischen und pharmazeutischen Bereich bestimmt. Sie enthält bewährte Beispiele für die Ausführung von Plattierungen, Auskleidungen und Mischverbindungen in der Schweißtechnik an Druckbehältern (z. B. Behälter, Kessel und Rohrleitungen). Im folgenden Text wird demnach der Begriff Behälter für Druckbehälter verwendet.
Diese Beispiele können auch für andere Anwendungsgebiete bei Beachtung der jeweiligen Anforderungen geeignet sein. In Sonderfällen, z. B. bei besonderen Korrosionsproblemen oder Werkstoffen, deren Bearbeitung besondere Maßnahmen erfordern, können abweichende Lösungen erforderlich sein, die zwischen Käufer  und Hersteller zu vereinbaren sind.
Soweit nationale Vorschriften und entsprechende Ausführungsspezifikationen zutreffen, sind die dort getroffenen Festlegungen bei der Auswahl der Gestaltungsbeispiele sowie gegebenenfalls abweichende oder weiter¬gehende Forderungen zu beachten.
Diese Europäische Norm ersetzt nicht die festigkeitsmäßige Bemessung der Schweißverbindungen (z. B. nach EN 12952, EN 12953, EN 13445 und EN 13480). Sie ist anzuwenden unter Beachtung der angegebenen Anwendungsgrenzen für Druckbehälter und druck¬beanspruchte Apparaten, deren tragende Wanddicke  30 mm beträgt. Diese Grenze wurde aus konstruktiven Gründen gewählt und nicht wegen gegebenenfalls erforderlicher Wärmebehandlung. Diese Begrenzung bezieht sich nur auf die Stumpfnähte in der tragenden Behälterwand und nicht auf die Dicke von Flanschen, Rohrböden, ebenen Böden und ähnlichen Behälterbauteilen.
Diese Europäische Norm gilt für folgende Stähle:
-   unlegierte Stähle mit Mindestzugfestigkeiten Rm  450 MPa;
-   die Stähle P295GH und 16Mo3 nach EN 10028-2;
-   Feinkornbaustähle nach EN 10028-3 mit einer Mindeststreckgrenze ReL  355 MPa;
-   austenitische Stähle nach EN 10028-7.

Soudage - Descriptif de base des assemblages soudés en acier - Partie 3: Composants plaqués, beurrés et doublés soumis à la pression

La présente Norme européenne complète l’EN 1708-1 en ce qui concerne les applications utilisées dans les secteurs industriel, chimique et pharmaceutique. Elle spécifie des méthodes éprouvées pour réaliser des placages, doublages et assemblages hétérogènes, relatives aux techniques de soudage et aux composants soumis à la pression (par exemple, récipients sous pression, chaudières et tuyaux. Par conséquent, dans le texte qui suit, le terme « récipients » sera utilisé pour désigner les composants soumis à pression.
Ces méthodes peuvent également être utilisées dans d’autres applications à condition de respecter les exigences correspondantes. Dans des cas exceptionnels tels que les problèmes particuliers relatifs à la corrosion ou aux matériaux nécessitant des procédés spécifiques, d’autres solutions peuvent s’avérer nécessaires. Elles doivent faire l’objet d’un accord entre l’acheteur et le fabricant.
Les réglementations nationales appropriées et les spécifications de conception correspondantes doivent être respectées lors de la sélection des modèles de conception et, le cas échéant, des exigences différentes ou supplémentaires.
La présente Norme européenne ne prévaut pas sur les conditions de dimensionnement des assemblages soudés concernant la résistance (par exemple, selon l’EN 12952, l’EN 12953, l’EN 13445 et l’EN 13480). Elle doit être appliquée conformément aux limites spécifiées relatives aux récipients et aux appareils sous pression subissant des contraintes de compression et présentant une épaisseur de paroi d’appui  30 mm. Cette limite est choisie pour des raisons structurelles et non en raison du traitement thermique qui peut être demandé. La limite d’épaisseur de la paroi s’applique aux soudures bout à bout uniquement dans la paroi d’appui du récipient et ne s’applique pas aux brides, aux plaques tubulaires des tubes, aux fonds plats ou aux autres composants similaires de récipients.

Varjenje - Opisi zvarnih spojev na jeklu - 3. del: Platiranje, nanašanje vmesnih slojev in oblaganje komponent tlačne opreme

Ta evropski standard dopolnjuje standard EN 1708-1 glede uporab v industrijskem, kemičnem in farmacevtskem sektorju. Navaja ustrezne primere konstrukcije prevlek, oblog in heterogenih spojev v zvezi z varjenjem in komponentami tlačne opreme (npr. posode, kotli in cevi). Zato se bo v naslednjem besedilu za komponente tlačne opreme uporabljal izraz posode.
Ti primeri se lahko uporabljajo tudi za druge uporabe, če se upoštevajo ustrezne zahteve. V izjemnih primerih, kot so posebne težave v zvezi s korozijo, ali pri materialih, za katere so potrebni posebni postopki, so lahko potrebne druge rešitve, o katerih se morata dogovoriti kupec in izdelovalec.
Pri izbiri primerov zasnove je treba upoštevati ustrezne nacionalne predpise in ustrezne specifikacije zasnove ter po potrebi drugačne ali dodatne zahteve.
Ta evropski standard ne razveljavlja pogojev dimenzioniranja varjenih spojev, kar zadeva trdnost (npr. v skladu s standardi EN 12952, EN 12953, EN 13445 in EN 13480). Uporabljati ga je treba v okviru določenih omejitev naprav, ki veljajo za tlačne posode in naprave pod tlačno napetostjo z debelino nosilne stene <= 30 mm. Ta omejitev je določena zaradi konstrukcijskih razlogov in ne zaradi toplotne obdelave, ki je lahko potrebna. Omejitev glede debeline stene se uporablja le za soležne zvare v nosilni steni posode in ne za prirobnice, pritrdilne elemente za cevi ali druge podobne sestavne dele posode.
Ta evropski standard se uporablja za naslednje vrste jekla:
– nelegirano jeklo z najmanjšo natezno trdnostjo Rm <= 450 MPa;
– P295GH in 16Mo3 v skladu s standardom EN 10028-2;
– drobnozrnato jeklo z najmanjšo mejo tečenja ReL <= 355 MP v skladu s standardom EN 10028-3;
– avstenitno jeklo v skladu s standardom EN 10028-7.
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General Information

• Status: Published
• Public Enquiry End Date: 24-Sep-2010
• Publication Date: 28-Mar-2012
• ICS: 25.160.40 - Welded joints and welds
• Technical Committee: VAR - Welding
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Mar-2012
• Due Date: 27-May-2012
• Completion Date: 29-Mar-2012
• Ref Project: EN 1708-3:2012 - Welding - Basic weld joint details in steel - Part 3: Clad, buttered and lined pressurized components

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Schweißen - Verbindungselemente beim Schweißen von Stahl - Teil 3: Plattierungen, Pufferungen, Auskleidungen druckbeanspruchter BauteileSoudage - Descriptif de base des assemblages soudés en acier - Partie 3: Composants plaqués, beurrés et doublés soumis à la pressionWelding - Basic weld joint details in steel - Part 3: Clad, buttered and lined pressurized components25.160.40Varjeni spoji in variWelded jointsICS:Ta slovenski standard je istoveten z:EN 1708-3:2012SIST EN 1708-3:2012en,fr,de01-maj-2012SIST EN 1708-3:2012SLOVENSKI
STANDARD



SIST EN 1708-3:2012



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE 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 pressurized components
Soudage - Descriptif de base des assemblages soudés en acier - Partie 3: Composants plaqués, beurrés et doublés soumis à la pression
Schweißen - Verbindungselemente beim Schweißen von Stahl - Teil 3: Plattierungen, Pufferungen, Auskleidungen druckbeanspruchter Bauteile This European 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 concerning 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 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 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: ESIST EN 1708-3:2012



EN 1708-3:2012 (E) 2 Contents Page Foreword .31 Scope .42 Normative references .43 Terms and definitions .54 Requirements .54.1 General .54.2 Dissimilar metal joints .54.3 Welds for clad steel .64.4 Weld design examples .6Bibliography . 18 Tables Table 1— Clad steels. 6Table 2 — Linings . 8Table 3 — Dissimilar metal joints . 11Table 4 — Complex connections . 14 SIST EN 1708-3:2012



EN 1708-3:2012 (E) 3 Foreword This document (EN 1708-3:2012) has been prepared 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 shall 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 details 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 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, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 1708-3:2012



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, linings 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 provided 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 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 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 limit 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 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 and 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 referenced 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 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 10028-7, Flat products made of steels for pressure purposes — Part 7: Stainless steels ISO/TR 25901:2007, Welding and related processes — Vocabulary SIST EN 1708-3:2012



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 material 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 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 welding 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. 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 guaranteed 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 with 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 ≤ 300 °C throughout, then austenitic filler metals which have been tested for suitability can be chosen. b) If the weld is post weld he
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