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 L 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, a fond plat, cylindriques, verticaux, construits sur site destinés au stockage des liquides a la température ambiante ou supérieure

1.1   Le présent document spécifie les exigences relatives aux matériaux, a la conception, a la fabrication, au montage, au contrôle et a l'inspection des réservoirs en acier verticaux cylindriques a fond plat, de construction soudée, aériens et montés sur chantier, destinés au stockage de liquides a température ambiante et au-dela (voir Annexe A).
Le présent document ne s'applique pas aux réservoirs dans lesquels le produit est réfrigéré pour etre maintenu a l'état liquide a 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 a la démarche de conception, au fonctionnement, a la sécurité, a la protection incendie, a l'inspection en service, a 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 a 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 gazometres a cloche.
1.3   Le présent document s'applique aux réservoirs de stockage présentant les caractéristiques suivantes :
a)   pression d'étude inférieure a 500 mbar ) et pression intérieure négative d'étude non inférieure a 20 mbar (voir 5.1 pour les limites de pression) ;
b)   température d'étude du métal supérieure ou égale a - 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 a l'application du présent document sont les suivantes .
-   la face de la premiere bride dans un raccord a bride boulonnée ;
-   le premier raccord fileté sur le tuyau ou le manchon a l'extérieur de la robe, du toit ou du fond du réservoir ;
-   le premier joint circonférentiel dans un tuyau ne comportant pas de raccord a 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
28-Feb-2005
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Mar-2005
Due Date
01-Mar-2005
Completion Date
01-Mar-2005

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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
SIST EN 14015:2005

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

EN 14015:2004 (E)
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

EN 14015:2004 (E) 3 7.2.3 Thermally induced loads................................................................................................38 7.2.4 Dead loads.......................................................................................................................38 7.2.5 Insulation loads...............................................................................................................38 7.2.6 Live load...........................................................................................................................38 7.2.7 Concentrated live load....................................................................................................38 7.2.8 Snow loads......................................................................................................................38 7.2.9 Rainfall.............................................................................................................................39 7.2.10 Wind..................................................................................................................................39 7.2.11 Seismic loads..................................................................................................................39 7.2.12 Loads resulting from connected piping and attachments..........................................39 7.2.13 Foundation settlement loads.........................................................................................39 7.2.14 Emergency loads............................................................................................................39 7.3 Load combinations.........................................................................................................39 8 Tank bottoms...................................................................................................................40 8.1 General.............................................................................................................................40 8.2 Materials...........................................................................................................................40 8.3 Design..............................................................................................................................43 8.4 Fabrication.......................................................................................................................43 9 Shell design.....................................................................................................................45 9.1 Design and test stress....................................................................................................45 9.2 Internal loads...................................................................................................................48 9.3 Wind and vacuum loads.................................................................................................49 9.3.1 Stiffening rings................................................................................................................49 9.3.2 Primary stiffening ring (wind girder) design................................................................51 9.3.3 Secondary stiffening ring (wind girder) design...........................................................51 9.4 Shell plate arrangement.................................................................................................54 9.5 Shell joints.......................................................................................................................54 10 Fixed roof design............................................................................................................54 10.1 Loads................................................................................................................................54 10.2 Type of roof.....................................................................................................................54 10.3 Roof plating with supporting structure........................................................................54 10.4 Roof plating without supporting structure (membrane roofs)...................................56 10.5 Compression area at the junction of the shell and roof.............................................56 10.6 Venting requirements.....................................................................................................59 10.6.1 General.............................................................................................................................59 10.6.2 Scope of venting provided.............................................................................................59 10.6.3 Venting capacity..............................................................................................................59 10.6.4 Accumulation of pressure and vacuum........................................................................59 10.7 Floating covers................................................................................................................59 11 Floating roof design........................................................................................................59 12 Tank anchorage...............................................................................................................60 12.1 General.............................................................................................................................60 12.2 Anchorage attachment...................................................................................................60 12.3 Holding down bolt or strap............................................................................................60 12.3.1 Allowable tensile stress.................................................................................................60 12.3.2 Cross-sectional area.......................................................................................................60 12.4 Resistance to uplift during test.....................................................................................61 13 Mountings........................................................................................................................61 13.1 Shell nozzles O/D 80 mm and above.............................................................................61 13.2 Shell nozzles less than O/D 80 mm...............................................................................71 13.3 Roof nozzles....................................................................................................................71 13.4 Studded pad connections..............................................................................................73 13.5 Nozzle loads....................................................................................................................73 13.6 Flush type clean-out doors and water draw-off sumps..............................................73 13.6.1 General.............................................................................................................................73 13.6.2 Flush type clean-out doors............................................................................................74 SIST EN 14015:2005

EN 14015:2004 (E) 4 13.6.3 Water draw-off sumps....................................................................................................74 13.6.4 Combined water draw-off and clean-out sump............................................................74 13.7 Nozzle welding details....................................................................................................74 13.8 Flange drilling..................................................................................................................75 13.9 Post-weld heat treatment of nozzles.............................................................................75 13.10 Heating and/or cooling systems....................................................................................75 13.11 Stairways and walkways................................................................................................78 13.12 Handrailing......................................................................................................................78 13.13 Ladders............................................................................................................................79 13.14 Earthing connections.....................................................................................................79 13.15 Permanent attachments.................................................................................................79 13.16 Temporary attachments.................................................................................................79 14 Insulation.........................................................................................................................79 15 Shop fabrication of tank components..........................................................................79 15.1 General.............................................................................................................................79 15.2 Reception and identification of materials.....................................................................79 15.3 Handling and storage of materials................................................................................80 15.4 Material markings............................................................................................................80 15.5 Plate preparation and tolerances..................................................................................81 15.6 Preparation of nozzle components...............................................................................81 15.7 Plate forming and tolerances.........................................................................................81 15.8 Openings..........................................................................................................................81 15.8.1 Nozzles.............................................................................................................................81 15.8.2 Inspection windows........................................................................................................82 15.8.3 Nozzles for mixers..........................................................................................................82 15.8.4 Clean-out doors...............................................................................................................82 15.8.5 Reinforcement plates......................................................................................................82 15.8.6 Insert plates.....................................................................................................................82 15.9 Welding............................................................................................................................82 15.10 Surface condition............................................................................................................83 15.11 Marking for erection purposes......................................................................................83 15.12 Packing, handling and transport to site.......................................................................83 16 Site erection and tolerances..........................................................................................84 16.1 General.............................................................................................................................84 16.2 Foundations.....................................................................................................................84 16.2.1 General.............................................................................................................................84 16.2.2 Peripheral tolerance........................................................................................................85 16.2.3 Foundation surface tolerance........................................................................................85 16.3 Anchor points..................................................................................................................85 16.4 Handling and storage.....................................................................................................86 16.5 Rectification of parts damaged during transportation and handling........................86 16.6 Bottom plates..................................................................................................................86 16.7 Shell to bottom, and shell..............................................................................................86 16.7.1 Assembly tolerances of first shell course on flat bottom...........................................86 16.7.2 Tolerance on shell geometry.........................................................................................87 16.7.3 Vertical tolerance............................................................................................................88 16.7.4 Tolerances on alignment of plates................................................................................88 16.7.5 Tolerances on shape of welded joints..........................................................................88 16.7.6 Primary and secondary stiffening rings (wind girders)..............................................89 16.8 Fixed roofs.......................................................................................................................89 16.8.1 General.............................................................................................................................89 16.8.2 Support framework.........................................................................................................89 16.8.3 Roof plates.......................................................................................................................89 16.8.4 Roof plating and roof structure.....................................................................................90 16.8.5 Frangible roofs................................................................................................................90 16.9 Nozzles.............................................................................................................................90 16.10 External attachments......................................................................................................90 16.11 Internal attachments.......................................................................................................90 SIST EN 14015:2005

EN 14015:2004 (E) 5 16.12 Temporary attachments.................................................................................................90 17 Approval of welding procedures and welders.............................................................91 17.1 General.............................................................................................................................91 17.2 Welding procedure approval.........................................................................................91 17.2.1 General.............................................................................................................................91 17.2.2 Welding of test pieces....................................................................................................91 17.2.3 Examination and testing of test pieces........................................................................91 17.3 Welding Procedure Approval Record (WPAR).............................................................92 17.3.1 Preparation......................................................................................................................92 17.3.2 Range of approval...........................................................................................................92 17.4 Welders and welding operators approval.....................................................................92 17.5 Production control test plates.......................................................................................92 17.5.1 Horizontal welds..............................................................................................................92 17.5.2 Vertical welds..................................................................................................................93 18 Welding............................................................................................................................93 18.1 General.............................................................................................................................93 18.2 Welding sequences.........................................................................................................93 18.3 Welding of bottoms.........................................................................................................93 18.3.1 Removal of coatings.......................................................................................................93 18.3.2 Annular ring plates.........................................................................................................93 18.3.3 Bottom plates..................................................................................................................94 18.4 Welding of shell to bottom.............................................................................................94 18.5 Welding of shell...............................................................................................................94 18.6 Welding of roof................................................................................................................94 18.7 Temporary welds.............................................................................................................94 18.8 Atmospheric conditions.................................................................................................94 18.9 Preheating........................................................................................................................95 18.10 Post-weld heat treatment...............................................................................................95 18.11 Repair welding.................................................................................................................96 19 Testing and inspection...................................................................................................96 19.1 General.............................................................................................................................96 19.2 Qualification of NDT personnel.....................................................................................96 19.3 Test procedures..............................................................................................................97 19.4 Type of inspections and examinations.........................................................................97 19.4.1 Inspection of materials...................................................................................................97 19.4.2 Examinations of edges to be welded and joint preparations.....................................97 19.4.3 Visual examination..........................................................................................................97 19.4.4 Type and extent of examination and test of welds......................................................98 19.4.5 Additional examinations if imperfections are found.................................................102 19.5 Vacuum box test...........................................................................................................103 19.6 Penetrant test................................................................................................................104 19.7 Magnetic particle examination.....................................................................................104 19.8 Soap bubble examination............................................................................................104 19.8.1 Reinforcement plates....................................................................................................104 19.8.2 Fixed roof and roof to shell..........................................................................................104 19.8.3 Shell to bottom with double fillet weld.......................................................................105 19.9 Radiographic examination...........................................................................................105 19.9.1 General procedure........................................................................................................105 19.9.2 Storage of films............................

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