oSIST prEN 14015:2025

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.
It is concerned with the structural design 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.
This document is intended for use in conjunction with EN 1993-4-2 and so adheres the general principles and performance requirements for the structural design and serviceability limit states of those tank components. Specific requirements are addressed in EN 14015.
It is applicable to:
–   closed-top tanks, with and without internal floating roofs;
–   open-top tanks, with and without floating roofs;
–   tanks for which:
a)   the design pressure is not greater than 60 mbar;
b)   the design internal negative pressure is not lower than 6,0 mbar;
c)   the design metal temperature is between –40 °C and +300 °C;
d)   the maximum design liquid level is not higher than the top of the cylindrical shell;
e)   the maximum allowable stress does not exceed 260 N/mm2.
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.
This document does not apply to tanks where the product is refrigerated to maintain it as a liquid at atmospheric pressure.

Auslegung und Herstellung standortgefertigter, oberirdischer, stehender, zylindrischer, geschweißter Flachboden-Stahltanks für die Lagerung von Flüssigkeiten bei Umgebungstemperatur und höheren Temperaturen

Dieses Dokument legt die Anforderungen an die Werkstoffe, Auslegung, Fertigung, Errichtung sowie Prüfung und Inspektion standortgefertigter, oberirdischer, stehender, zylindrischer, geschweißter Flachboden-Stahltanks für die Lagerung von Flüssigkeiten bei Umgebungstemperatur und höheren Temperaturen fest.
Es behandelt die gesamte bauliche Ausführung der grundlegenden Tankteile und enthält keine Anforderungen an die Betrachtung von Verfahrensauslegung, Betrieb, Sicherheits- und Feuerlöscheinrichtungen, Inspektionen im Betrieb, Wartung oder Reparatur.
Dieses Dokument ist für die Anwendung in Verbindung mit EN 1993-4-2 vorgesehen und berücksichtigt daher die allgemeinen Grundsätze und Leistungsanforderungen für die Tragwerksplanung sowie die Grenzzustände der Gebrauchstauglichkeit jener Tankbauteile. Spezifische Anforderungen werden in EN 14015 behandelt.
Es gilt für:
- geschlossene Tanks mit oder ohne interne Schwimmdächer;
- offene Tanks mit oder ohne Schwimmdächer;
- Tanks mit oder ohne Kugelsegmente;
- Tanks, deren:
a) Auslegungsdruck nicht größer als 60 mbar ist;
b) Auslegungsunterdruck nicht unter 6,0 mbar liegt;
c) Auslegungswandtemperatur zwischen −40 °C und +300 °C liegt;
d) maximale Füllhöhe nicht höher als die Oberkante des zylindrischen Teils des Mantels ist;
e) höchstzulässige Spannung 260 N/mm2 nicht übersteigt.
Der Anwendungsbereich dieses Dokuments 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.
Dieses Dokument gilt nicht für Tanks für Produkte, die unter atmosphärischem Druck nur in gekühltem Zustand flüssig sind.

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

Specifikacija za načrtovanje in izdelavo 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: Not Published
• Public Enquiry End Date: 19-Nov-2025
• ICS: 23.020.10 - Stationary containers and tanks
• Technical Committee: TLP - Pressure vessels
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 10-Sep-2025
• Due Date: 28-Jan-2026
• Ref Project: prEN 14015 - 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

Relations

• Revises: SIST EN 14015:2005 - 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
• Effective Date: 01-Nov-2025

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2025
Specifikacija za načrtovanje in izdelavo na mestu postavitve grajenih navpičnih,
valjastih, varjenih, jeklenih nadzemnih posod z ravnim dnom za shranjevanje
tekočin pri temperaturi okolja ali višji temperaturi
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
Auslegung und Herstellung standortgefertigter, oberirdischer, stehender, zylindrischer,
geschweißter Flachboden-Stahltanks für die Lagerung von Flüssigkeiten bei
Umgebungstemperatur und höheren Temperaturen
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
Ta slovenski standard je istoveten z: prEN 14015
ICS:
23.020.10 Nepremične posode in Stationary containers and
rezervoarji tanks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2025
ICS Will supersede EN 14015:2004
English Version
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
Spécification pour la conception et la fabrication de Auslegung und Herstellung standortgefertigter,
réservoirs en acier, soudés, aériens, à fond plat, oberirdischer, stehender, zylindrischer, geschweißter
cylindriques, verticaux, construits sur site destinés au Flachboden-Stahltanks für die Lagerung von
stockage des liquides à la température ambiante ou Flüssigkeiten bei Umgebungstemperatur und höheren
supérieure Temperaturen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 265.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14015:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 19
Introduction . 20
1 Scope . 21
2 Normative references . 21
3 Terms, definitions, symbols and abbreviations . 24
3.1 Terms and definitions . 24
3.2 Symbols . 27
3.3 Abbreviations . 29
4 Information and requirements to be specified . 30
4.1 Information to be specified by the purchaser . 30
4.2 Information to be agreed between the purchaser and the tank manufacturer . 30
4.3 Information to be supplied by the tank manufacturer . 30
4.4 Information to be supplied by the steel manufacturer . 30
4.5 Information to be agreed between the steel manufacturer and the tank manufacturer
................................................................................................................................................................... 30
4.6 Information to be agreed between the purchaser and the internal floating roof
supplier . 30
4.7 Information to be agreed between the tank manufacturer and the internal floating
roof supplier . 30
4.8 Information to be supplied by the internal floating roof supplier . 30
4.9 Information to be agreed between the purchaser and the supplier of the aluminium
dome roof covering an open top steel tank . 30
4.10 Information to be agreed between the tank manufacturer and the supplier of the
aluminium dome roof . 31
4.11 Information to be supplied by the supplier of the aluminium dome roof . 31
5 Requirements . 31
5.1 Design pressure . 31
5.2 Design metal temperature . 32
5.2.1 Maximum design metal temperature . 32
5.2.2 Minimum design metal temperature . 32
5.3 Design density . 32
5.4 Yield strength . 32
5.5 Material compatibility between stored product and tank . 33
6 Materials . 33
6.1 Carbon and carbon manganese steels . 33
6.1.1 Plate materials . 33
6.1.2 Structural steel sections . 37
6.1.3 Forgings . 38
6.1.4 Pipes . 39
6.1.5 Welding consumables . 39
6.1.6 Charpy V-notch impact energy requirements of carbon and carbon manganese steels
................................................................................................................................................................... 39
6.1.7 Mountings . 40
6.1.8 Thickness tolerances . 41
6.2 Stainless steels . 41
6.2.1 Selection of materials . 41
6.2.2 Plates and drawn products . 43
6.2.3 Forgings . 43
6.2.4 Pipes . 44
6.2.5 Welding consumables . 44
6.3 Anchors and structural bolts . 44
7 Design loads . 46
7.1 Loads . 46
7.2 Load values . 47
7.2.1 Liquid induced loads . 47
7.2.2 Internal pressure loads . 47
7.2.3 Thermally induced loads . 47
7.2.4 Dead loads . 47
7.2.5 Insulation loads . 47
7.2.6 Distributed live load . 47
7.2.7 Concentrated live load . 47
7.2.8 Snow loads. 47
7.2.9 Rainfall loads . 47
7.2.10 Wind . 48
7.2.11 Seismic loads . 56
7.2.12 Loads resulting from connected piping and attachments . 56
7.2.13 Foundation settlement loads . 57
7.2.14 Emergency loads . 57
7.2.15 Load combinations . 57
8 Tank bottoms . 59
8.1 General . 59
8.2 Materials . 59
8.3 Design . 61
8.1 Fabrication . 62
9 Shell design .
...