EN 1708-3:2012
(Main)Welding - Basic weld joint details in steel - Part 3: Clad, buttered and lined pressurized components
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 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.
Schweißen - Verbindungselemente beim Schweißen von Stahl - Teil 3: Plattierungen, Pufferungen, Auskleidungen druckbeanspruchter Bauteile
Diese Europäische Norm gilt ergänzend zu EN 1708-1. Sie gilt für die Anwendung im gewerblichen, chemischen und pharmazeutischen Bereich. Sie legt bewährte Beispiele für die Ausführung von Plattierungen, Auskleidungen und Mischverbindungen und komplexe Verbindungen in der Schweißtechnik an Druckbehältern (z. B. Behälter, Kessel und Rohrleitungen) fest. Im folgenden Text wird demnach der Begriff druckbeanspruchte Bauteile 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 bzw. Abnehmer 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 weitergehende 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 druckbeanspruchte Bauteile, 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. Diese Europäische Norm kann auch für andere Stähle und/oder größere Wanddicken zugrunde gelegt werden, wenn dies zwischen Hersteller und Besteller/Betreiber vereinbart ist.
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 des assemblages mixtes et des assemblages complexes, 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, les termes composants soumis à pression seront utilisés.
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 composants soumis à pression 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 fonds torisphèriques, aux
fonds plats ou aux autres pièces similaires.
La présente Norme européenne s’applique aux types d’acier suivants :
- aciers non alliés présentant une résistance minimale à la traction de Rm ≤ 450 Mpa ;
- P295GH and 16Mo3 according to EN 10028-2 ;
- aciers soudables à grains fins conformément à l’EN 10028-3 avec une limite d’élasticité minimale
ReL ≤ 355 Mpa ;
- aciers austénitiques conformément à l’EN 10028-7.
La présente Norme européenne peut également s’appliquer à d’autres aciers et/ou épaisseurs de paroi plus
grandes sous réserve d’un accord entre le fabricant et l’acheteur ou l’autorité exploitante.
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.
(...)
General Information
- Status
- Published
- Publication Date
- 06-Mar-2012
- Withdrawal Date
- 29-Sep-2012
- Technical Committee
- CEN/TC 121 - Welding
- Drafting Committee
- CEN/TC 121/SC 4 - Quality management in the field of welding
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 13-Oct-2025
- Completion Date
- 28-Jan-2026
Relations
- Refers
EN 1708-1:2010 - Welding - Basic welded joint details in steel - Part 1: Pressurized components - Effective Date
- 28-Jan-2026
- Refers
EN 10028-7:2016 - Flat products made of steels for pressure purposes - Part 7: Stainless steels - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 1708-3:2012 (CEN) - "Welding - Basic weld joint details in steel - Part 3: Clad, buttered and lined pressurized components" provides established design examples and welding guidance for claddings, buttering and linings used on pressurized components (vessels, boilers, piping). It complements EN 1708‑1 by focusing on industrial, chemical and pharmaceutical applications and gives practical weld joint details, limitations and selection guidance without replacing strength- or dimensioning standards.
Key topics and technical requirements
- Scope and materials: Applies to ferritic and austenitic steels commonly used for pressure equipment, including non‑alloy steels (Rm ≤ 450 MPa), P295GH and 16Mo3 (EN 10028‑2), fine‑grain steels (EN 10028‑3, ReL ≤ 355 MPa) and austenitic steels (EN 10028‑7). Application to other steels/wall thicknesses is possible by agreement.
- Application limits: Intended for pressurized components subject to compression stress with bearing butt‑weld wall thicknesses ≤ 30 mm (structural limit only; excludes some heads/flanges).
- Cladding and lining design: Typical austenitic cladding thickness tp is 2–4 mm; minimum lining thickness tl is 2 mm. Tables in the standard give examples (clad, lined, tailored blanks, plug welds) and minimum dimensions for common detail types.
- Dissimilar metal joints: Guidance on filler metal selection:
- If no post‑weld heat treatment (PWHT) and operating temperature ≤ 300 °C → austenitic filler metals (suitability tested).
- If PWHT and/or operating temperature > 300 °C → nickel‑based alloys or other tested fillers; strength differences must be considered in design.
- Local melt‑throughs are not permissible for ferritic–austenitic joints; minimum austenitic wall thicknesses (e.g. t1 ≥ 4.0 mm) are specified for many cases.
- Welding practice & testing: EN 1011‑5 applies to welding of clad steel. Cladding adhesion should be checked (e.g. UT) prior to subsequent welding. Avoid cavities between ferritic base metal and austenitic liner for elevated temperature service.
Practical applications and users
- Target users: welding engineers, fabricators, pressure‑vessel and piping manufacturers, QA/QC inspectors, design engineers and procurement in chemical, pharmaceutical, power and general process industries.
- Typical uses: designing and detailing welded connections for clad vessels, buttered transitions, lined nozzles, flanges and complex connections where corrosion resistance or dissimilar materials are required.
- Practical value: provides ready design examples, minimum dimensions and welding constraints to inform WPS development, inspection planning and purchaser‑manufacturer agreements.
Related standards
- EN 1708‑1 (pressurized components), EN 1011‑5 (welding of clad steel)
- EN 10028‑2/3/7 (material specifications)
- EN 12952 / EN 12953 / EN 13445 / EN 13480 (dimensioning/strength requirements)
- ISO/TR 25901, CEN ISO/TR 15608, CEN ISO/TR 20172
Keywords: EN 1708-3:2012, welding, clad steel, buttering, lining, pressurized components, dissimilar metal joints, pressure vessel welding, EN 1011-5.
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Frequently Asked Questions
EN 1708-3:2012 is a standard published by the European Committee for Standardization (CEN). Its full title is "Welding - Basic weld joint details in steel - Part 3: Clad, buttered and lined pressurized components". This standard covers: 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.
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.
EN 1708-3:2012 is classified under the following ICS (International Classification for Standards) categories: 25.160.40 - Welded joints and welds. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1708-3:2012 has the following relationships with other standards: It is inter standard links to EN 1708-1:2010, EN 10028-7:2016, EN 1011-5:2003, EN 10028-3:2017, EN 10028-2:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 1708-3:2012 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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
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
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
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
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