EN 14015:2004
(Main)Specification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above
Specification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above
This document specifies the requirements for the materials, design, fabrication, erection, testing and inspection of site built, vertical, cylindrical, flat bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperatures and above, and the technical agreements that need to be reached (see Annex A).
This document does not apply to tanks where the product is refrigerated to maintain it as a liquid at atmospheric pressure (see prEN 14620).
This document is concerned with the structural integrity of the basic tank structure and does not provide requirements for considering process design, operational issues, safety and firefighting facilities, in-service inspection, maintenance or repair. These aspects are covered in detail in other Codes of Practice (see Annex B).
1.2 This document applies to closed-top tanks, with and without internal floating covers (see Annex C) and open-top tanks, with and without floating roofs (see Annexes D and E). It does not apply to 'lift-type' gas holders.
1.3 This document applies to storage tanks with the following characteristics:
a) design pressure less than 500 mbar ) and design internal negative pressure not lower than 20 mbar (see 5.1 for pressure limitations);
b) design metal temperature not lower than -40 °C and not higher than +300 °C (see 5.2.2);
c) maximum design liquid level not higher than the top of the cylindrical shell.
1.4 The limits of application of this document terminate at the following locations.
- face of the first flange in a bolted flange connection;
- first threaded joint on the pipe or coupling outside of the tank shell, roof or bottom;
- first circumferential joint in a pipe not having a flange connection.
1.5 This document is applicable to steel tanks with a maximum design strength £ 260 N/mm2.
1.6 In addition to the definitive requirements, this document also requires the items detailed in Annex A to be documented. For compliance with this document,
Auslegung und Herstellung standortgefertigter, oberirdischer, stehender, zylindrischer, geschweißter Flachboden-Stahltanks für die Lagerung von Flüssigkeiten bei Umgebungstemperatur und höheren Temperaturen
1.1 Diese Europäische Norm legt die Anforderungen für die Werkstoffe, Auslegung, Herstellung, Errichtung sowie Prüfung und Inspektion standortgefertigter, oberirdischer, stehender, zylindrischer, geschweißter Flachboden-Stahltanks für die Lagerung von Flüssigkeiten bei Umgebungstemperatur und bei höheren Temperaturen sowie die erforderlichen zugehörigen technischen Vereinbarungen (siehe Anhang A) fest.
Diese Europäische Norm gilt nicht für Tanks für Produkte, die unter atmosphärischem Druck nur in gekühltem Zustand flüssig sind (siehe prEN 265002).
Diese Europäische Norm behandelt die gesamte bauliche Ausführung der grundlegenden Tankteile; sie enthält keine Anforderungen für die Betrachtung von Verfahrensauslegung, Betrieb, Sicherheits- und Feuerlöscheinrichtungen, für Prüfungen im Betrieb, Wartung oder Reparatur. Diese Bereiche werden in anderen Regelwerken behandelt (siehe Anhang B).
1.2 Diese Europäische Norm gilt für geschlossene Tanks mit und ohne innenliegende Schwimmdecke (siehe Anhang C) und offene Tanks mit und ohne Schwimmdach (siehe Anhänge D und E). Sie gilt nicht für Gasbehälter mit Hubdecke ('lift-type').
1.3 Diese Europäische Norm gilt für Lagertanks mit folgenden Merkmalen:
a) Auslegungsdruck unter 500 mbar ) und innerer Auslegungsunterdruck von mindestens 20 mbar (Grenzwerte siehe 5.1);
b) Auslegungswandtemperatur nicht unter -40 °C und nicht über +300 °C (siehe 5.2.2);
c) Maximale Füllhöhe nicht höher als die Oberkante des zylindrischen Teils des Mantels.
1.4 Der Anwendungsbereich dieser Norm endet
- an der Dichtfläche des ersten Flansches einer geschraubten Flanschverbindung;
- am ersten Gewindeanschluss von Rohr oder Schraubkupplung außerhalb von Tankmantel, -dach oder -boden;
- an der ersten Rohrverbindung bei Rohren ohne Flansch.
(...)
Spécification pour la conception et la fabrication de réservoirs en acier, soudés, aériens, à fond plat, cylindriques, verticaux, construits sur site destinés au stockage des liquides à la température ambiante ou supérieure
1.1 Le présent document spécifie les exigences relatives aux matériaux, à la conception, à la fabrication, au montage, au contrôle et à l'inspection des réservoirs en acier verticaux cylindriques à fond plat, de construction soudée, aériens et montés sur chantier, destinés au stockage de liquides à température ambiante et au-delà (voir Annexe A).
Le présent document ne s'applique pas aux réservoirs dans lesquels le produit est réfrigéré pour être maintenu à l'état liquide à la pression atmosphérique. (Voir prEN 14620).
Le présent document traite de l'intégrité de la structure de base des réservoirs de stockage et ne définit pas les exigences relatives à la démarche de conception, au fonctionnement, à la sécurité, à la protection incendie, à l'inspection en service, à la maintenance ou la réparation. Ces aspects sont traités en détail dans d'autres documents professionnels (voir Annexe B).
1.2 Le présent document s'applique aux réservoirs à toit fixe, avec et sans écran flottant interne (voir Annexe C), et aux cuves avec et sans toit flottant (voir Annexes D et E). Elle ne s'applique pas aux gazomètres à cloche.
1.3 Le présent document s'applique aux réservoirs de stockage présentant les caractéristiques suivantes :
a) pression d'étude inférieure à 500 mbar ) et pression intérieure négative d'étude non inférieure à 20 mbar (voir 5.1 pour les limites de pression) ;
b) température d'étude du métal supérieure ou égale à - 40 °C et n'excédant pas + 300 °C (voir 5.2.2) ;
c) niveau d'étude maximal du liquide ne dépassant pas le sommet de la robe cylindrique.
1.4 Les limites relatives à l'application du présent document sont les suivantes .
- la face de la première bride dans un raccord à bride boulonnée ;
- le premier raccord fileté sur le tuyau ou le manchon à l'extérieur de la robe, du toit ou du fond du réservoir ;
- le premier joint circonférentiel dans un tuyau ne comportant pas de raccord à bride.
1.5 Le présent document s'applique aux réservoirs en acie
Specifikacija za načrtovanje in proizvodnjo na mestu postavitve grajenih navpičnih, valjastih, varjenih, jeklenih nadzemnih posod z ravnim dnom za shranjevanje tekočin pri temperaturi okolja ali višji temperaturi
General Information
- Status
- Published
- Publication Date
- 09-Nov-2004
- Withdrawal Date
- 30-May-2005
- Technical Committee
- CEN/TC 265 - Site built metallic tanks for the storage of liquids
- Drafting Committee
- CEN/TC 265 - Site built metallic tanks for the storage of liquids
- Current Stage
- 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
- Start Date
- 09-Sep-2009
- Completion Date
- 09-Sep-2009
Relations
- Effective Date
- 25-Mar-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Refers
EN 1991-1-3:2003 - Eurocode 1 - Actions on structures - Part 1-3: General actions - Snow loads - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 14015:2004 is a key European standard published by CEN that specifies requirements for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above. This standard provides a comprehensive framework for specifying material selection, design, fabrication, erection, testing, and inspection of these storage tanks, ensuring structural integrity throughout their lifecycle. It applies to both open-top and closed-top tanks, with or without floating covers or roofs, within defined pressure and temperature limits.
EN 14015:2004 is widely referenced in various industries requiring the secure and reliable storage of liquids, such as chemicals, petroleum, food products, and water. Compliance with this standard helps organizations demonstrate adherence to best practices in tank construction and operation, which is critical for safety, regulatory, and quality assurance purposes.
Key Topics
Scope and Tank Types
- Covers site built, vertical, cylindrical, flat-bottomed, above ground, welded steel tanks.
- Applicable for ambient temperature liquid storage, with a design pressure less than 500 mbar and metal temperatures from -40 °C to +300 °C.
- Applies to tanks with closed tops (with or without internal floating covers) and open tops (with or without floating roofs).
Material and Design Requirements
- Specifies material properties, such as maximum design strength up to 260 N/mm².
- Details documentation and technical agreements required between purchasers, tank manufacturers, steel suppliers, and cover suppliers.
Fabrication and Erection
- Outlines procedures for fabrication of tank components, handling and storage of materials, tolerances, welding procedures, and erection tolerances.
Testing and Inspection
- Mandates types of inspections and nondestructive testing (NDT) for welds and materials.
- Addresses hydrostatic and pneumatic testing protocols.
Documentation
- Sets forth requirements for recordkeeping, including documentation and marking of tanks and components, as well as necessary name-plate data for traceability.
Note: EN 14015:2004 does not address refrigerated tanks, operational procedures, process design, safety and fire-fighting systems, in-service inspection, or repair. These are covered in other standards and codes of practice.
Applications
- Petroleum and Chemical Storage
- Ensures structural safety and compliance for above ground tanks used in the oil, gas, and chemical industries.
- Industrial Liquid Storage
- Used in industries storing non-refrigerated liquids at ambient or elevated temperatures.
- Water and Wastewater Facilities
- Applied in the design and construction of tanks for water storage, wastewater treatment, and industrial process liquids.
- Food and Beverage Processing
- Provides guidelines for tanks storing ingredients or products at required temperature ranges.
Organizations in these sectors use EN 14015:2004 to specify project requirements, confirm supplier compliance, and meet regulatory obligations for tank construction and inspection.
Related Standards
- prEN 14620 - Focuses on refrigerated storage tanks and is referenced for applications outside ambient temperature storage.
- API 650 - Widely used outside Europe for welded tanks for oil storage.
- EN 1993 (Eurocode 3) - General rules for steel structures, sometimes used in conjunction with EN 14015 for structural design.
- Relevant National Standards - Many countries adopt EN 14015 as their national standard for above ground steel tanks.
By following EN 14015:2004, manufacturers, contractors, and facility owners can ensure their above ground storage tanks meet European requirements for safety, reliability, and performance. Implementing these guidelines reduces the risk of structural failures and supports long-term operational security for liquid storage installations.
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Frequently Asked Questions
EN 14015:2004 is a standard published by the European Committee for Standardization (CEN). Its full title is "Specification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above". This standard covers: This document specifies the requirements for the materials, design, fabrication, erection, testing and inspection of site built, vertical, cylindrical, flat bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperatures and above, and the technical agreements that need to be reached (see Annex A). This document does not apply to tanks where the product is refrigerated to maintain it as a liquid at atmospheric pressure (see prEN 14620). This document is concerned with the structural integrity of the basic tank structure and does not provide requirements for considering process design, operational issues, safety and firefighting facilities, in-service inspection, maintenance or repair. These aspects are covered in detail in other Codes of Practice (see Annex B). 1.2 This document applies to closed-top tanks, with and without internal floating covers (see Annex C) and open-top tanks, with and without floating roofs (see Annexes D and E). It does not apply to 'lift-type' gas holders. 1.3 This document applies to storage tanks with the following characteristics: a) design pressure less than 500 mbar ) and design internal negative pressure not lower than 20 mbar (see 5.1 for pressure limitations); b) design metal temperature not lower than -40 °C and not higher than +300 °C (see 5.2.2); c) maximum design liquid level not higher than the top of the cylindrical shell. 1.4 The limits of application of this document terminate at the following locations. - face of the first flange in a bolted flange connection; - first threaded joint on the pipe or coupling outside of the tank shell, roof or bottom; - first circumferential joint in a pipe not having a flange connection. 1.5 This document is applicable to steel tanks with a maximum design strength £ 260 N/mm2. 1.6 In addition to the definitive requirements, this document also requires the items detailed in Annex A to be documented. For compliance with this document,
This document specifies the requirements for the materials, design, fabrication, erection, testing and inspection of site built, vertical, cylindrical, flat bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperatures and above, and the technical agreements that need to be reached (see Annex A). This document does not apply to tanks where the product is refrigerated to maintain it as a liquid at atmospheric pressure (see prEN 14620). This document is concerned with the structural integrity of the basic tank structure and does not provide requirements for considering process design, operational issues, safety and firefighting facilities, in-service inspection, maintenance or repair. These aspects are covered in detail in other Codes of Practice (see Annex B). 1.2 This document applies to closed-top tanks, with and without internal floating covers (see Annex C) and open-top tanks, with and without floating roofs (see Annexes D and E). It does not apply to 'lift-type' gas holders. 1.3 This document applies to storage tanks with the following characteristics: a) design pressure less than 500 mbar ) and design internal negative pressure not lower than 20 mbar (see 5.1 for pressure limitations); b) design metal temperature not lower than -40 °C and not higher than +300 °C (see 5.2.2); c) maximum design liquid level not higher than the top of the cylindrical shell. 1.4 The limits of application of this document terminate at the following locations. - face of the first flange in a bolted flange connection; - first threaded joint on the pipe or coupling outside of the tank shell, roof or bottom; - first circumferential joint in a pipe not having a flange connection. 1.5 This document is applicable to steel tanks with a maximum design strength £ 260 N/mm2. 1.6 In addition to the definitive requirements, this document also requires the items detailed in Annex A to be documented. For compliance with this document,
EN 14015:2004 is classified under the following ICS (International Classification for Standards) categories: 23.020.10 - Stationary containers and tanks. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 14015:2004 has the following relationships with other standards: It is inter standard links to EN 1993-4-2:2026, EN 485-2:2016+A1:2018, EN ISO 15607:2003, EN 1991-1-3:2003, EN 755-1:2016, EN 10088-1:2023, EN 1993-1-8:2024, EN 10250-4:2021, EN 10250-3:2022, EN 754-7:2016, EN 10217-5:2019, EN 10216-2:2024, EN 754-4:2008, EN ISO/IEC 80079-49:2024, EN ISO 3581:2023. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 14015:2004 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.UDMHQLKAuslegung und Herstellung standortgefertigter, oberirdischer, stehender, zylindrischer, geschweißter Flachboden-Stahltanks für die Lagerung von Flüssigkeiten bei Umgebungstemperatur und höheren TemperaturenSpécification pour la conception et la fabrication de réservoirs en acier, soudés, aériens, a fond plat, cylindriques, verticaux, construits sur site destinés au stockage des liquides a la température ambiante ou supérieureSpecification for the design and manufacture of site built, vertical, cylindrical, flat-bottomed, above ground, welded, steel tanks for the storage of liquids at ambient temperature and above23.020.10UH]HUYRDUMLStationary containers and tanksICS:Ta slovenski standard je istoveten z:EN 14015:2004SIST EN 14015:2005en01-marec-2005SIST EN 14015:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14015November 2004ICS 23.020.10English versionSpecification for the design and manufacture of site built,vertical, cylindrical, flat-bottomed, above ground, welded, steeltanks for the storage of liquids at ambient temperature andaboveSpécification pour la conception et la fabrication deréservoirs en acier, soudés, aériens, à fond plat,cylindriques, verticaux, construit sur site destinés austockage des liquides à la température ambiante ousupérieureAuslegung und Herstellung standortgefertigter,oberirdischer, stehender, zylindrischer, geschweißterFlachboden-Stahltanks für die Lagerung von Flüssigkeitenbei Umgebungstemperatur und höheren TemperaturenThis European Standard was approved by CEN on 2 February 2004.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 lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat 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 responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14015:2004: ESIST EN 14015:2005
2 Contents page
Foreword.11 1 Scope.12 2 Normative references.13 3 Terms, definitions, symbols and abbreviations.15 3.1 Terms and definitions.15 3.2 Symbols.19 3.3 Abbreviations.21 4 Information and requirements to be documented.22 4.1 Information to be specified by the purchaser.22 4.2 Information to be agreed between the purchaser and the tank manufacturer.22 4.3 Information to be supplied by the tank manufacturer.22 4.4 Information to be supplied by the steel manufacturer.22 4.5 Information to be agreed between the steel manufacturer and the tank manufacturer.22 4.6 Information to be agreed between the purchaser and the cover supplier.22 4.7 Information to be agreed between the tank manufacturer and the cover supplier.22 4.8 Information to be supplied by the cover supplier.22 5 Requirements.22 5.1 Design pressure.22 5.2 Design metal temperature.23 5.2.1 Maximum design metal temperature.23 5.2.2 Minimum design metal temperature.23 5.3 Design density.24 5.4 Yield strength.24 6 Materials.24 6.1 Carbon and carbon manganese steels.24 6.1.1 Plate materials.24 6.1.2 Structural steel sections.30 6.1.3 Forgings.30 6.1.4 Pipes.31 6.1.5 Welding consumables.31 6.1.6 Charpy V-notch impact energy requirements of carbon and carbon manganese steels.31 6.1.7 Mountings.33 6.1.8 Thickness tolerances.33 6.2 Stainless steels.34 6.2.1 General.34 6.2.2 Plate materials.36 6.2.3 Structural steel sections.36 6.2.4 Forgings.36 6.2.5 Pipes.36 6.2.6 Welding consumables.37 7 Design loads.37 7.1 Loads.37 7.2 Load values.38 7.2.1 Liquid induced loads.38 7.2.2 Internal pressure loads.38 SIST EN 14015:2005
Information and requirements to be documented.117 A.1 Information to be supplied by the purchaser.117 A.2 Information agreed between the purchaser and the manufacturer.119 A.3 Information to be supplied by the manufacturer.120 A.4 Information to be supplied by the steel manufacturer.121 A.5 Information to be agreed between the steel manufacturer and the tank manufacturer.121 A.6 Information to be agreed between the purchaser and the cover supplier.121 A.7 Information to be agreed between the tank manufacturer and the cover supplier121 A.8 Information to be supplied by the cover supplier.121 Annex B (informative)
Operational and safety considerations for storage tanks and storage installations.122 B.1 General.122 B.2 Tank type.122 B.2.1 Stored product.122 B.2.2 Local climatic and geological conditions.122 B.3 Health, safety and environmental considerations.123 B.3.1 Containment.123 B.3.2 Fire protection.123 B.4 Attachments to tanks for safety or firefighting facilities.123 Annex C (normative)
Requirements for floating covers.124 C.1 General.124 C.2 Types of floating covers.125 C.3 Design and construction requirements.128 C.3.1 Design.128 C.3.2 Materials of construction.130 C.3.3 Cover fittings.133 C.3.4 Tank fittings.137 C.4 Installation.139 C.4.1 Tank examination.139 C.4.2 Examination and installation of the cover.139 C.4.3 Tests.140 C.5 Documentation.140 Annex D (normative)
Requirements for floating roofs.141 D.1 General.141 D.2 Roof types.141 D.3 Design.141 D.3.1 General.141 D.3.2 Buoyancy.142 D.3.3 Structural design.144 D.3.4 Roof stability under wind load.144 D.3.5 Pontoon manholes.144 D.3.6 Roof manhole.144 D.3.7 Centering and anti-rotation devices.144 D.3.8 Main roof drains.145 SIST EN 14015:2005
Requirements for rim seals for floating roofs.150 E.1 General.150 E.2 Design.150 E.3 Seal types.151 E.4 Weather shields.151 E.5 Application and technical details of rim seals.151 E.5.1 Mechanical shoe seals.151 E.5.2 Spring-forced lip primary seals.152 E.5.3 Liquid-filled primary seals.152 E.5.4 Foam-filled primary seals.152 E.5.5 Spring-forced pad or lip secondary seals.152 E.5.6 Compression plate secondary seals.153 E.5.7 Wiper seals.153 E.5.8 Integrated primary/secondary seals.153 E.6 Installation.153 Annex F (normative)
Selection of carbon and carbon manganese steel plate to alternative specifications to those in 6.1.156 F.1 Alternative national standards.156 F.2 General.156 F.3 Chemical composition.156 F.4 Mechanical properties.158 F.5 Impact testing.158 F.5.1 General.158 F.5.2 Impact properties.159 Annex G (informative)
Recommendations for seismic provisions for storage tanks.161 G.1 General.161 G.2 Design loads.161 G.2.1
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