EN 14620-3:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and -165 °C
- Part 3: Concrete componentsOLConception et fabrication de réservoirs en acier a fond plat, verticaux, cylindriques, construits sur site, destinés au stockage des gaz réfrigérés, liquéfiés, dont les températures de service sont comprises entre 0 °C et -165 °C - Partie 3: Constituants bétonAuslegung und Herstellung standortgefertigter, stehender, zylindrischer Flachboden-Stahltanks für die Lagerung von tiefkalt verflüssigten Gasen bei Betriebstemperaturen zwischen 0 °C und -165 °C - Teil 3: Bauteile aus BetonTa slovenski standard je istoveten z:EN 14620-3:2006SIST EN 14620-3:2007en23.020.10UH]HUYRDUMLStationary containers and tanksICS:SLOVENSKI
STANDARDSIST EN 14620-3:200701-januar-2007

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14620-3
September 2006 ICS 23.020.10 English Version
Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and -165 °C - Part 3: Concrete components
Conception et fabrication de réservoirs en acier à fond plat, verticaux, cylindriques, construits sur site, destinés au stockage des gaz réfrigérés, liquéfiés, dont les températures de service sont comprises entre 0 °C et -165 °C - Partie 3: Constituants béton
Auslegung und Herstellung standortgefertigter, stehender, zylindrischer Flachboden-Stahltanks für die Lagerung von tiefkalt verflüssigten Gasen bei Betriebstemperaturen zwischen 0 °C und -165 °C - Teil 3: Bauteile aus Beton This European Standard was approved by CEN on 20 February 2006.
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 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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B-1050 Brussels © 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14620-3:2006: E

Materials.12 Figure A.1 — Notch on reinforcement bar.14 Annex B (informative)
Pre-stressed concrete tank.15 Table B.1 — Summary of the advantages and disadvantages of joints in the wall to base junction.16

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2007, and conflicting national standards shall be withdrawn at the latest by March 2007. EN 14620 Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and -165 °C consists of the following parts:  Part 1: General;  Part 2: Metallic components;  Part 3: Concrete components;  Part 4: Insulation components;  Part 5: Testing, drying, purging and cool down. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, 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 and United Kingdom.

1 Scope This European Standard specifies general requirements for materials, design and construction of the concrete components of the refrigerated liquefied gas storage tanks. This European Standard deals with the design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and –165 °C. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 206-1, Concrete — Part 1: Specification, performance, production and conformity EN 1992-1-1:2004, Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for buildings EN 1992-1-2:2004, Eurocode 2: Design of concrete structures — Part 1-2: General rules — Structural fire design EN 14620-1:2006, Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and −165°C — Part 1: General EN 14620-2, Design and manufacture of site built, vertical, cylindrical, flat-bottomed steel tanks for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and –165 °C — Part 2: Metallic components 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 14620-1:2006 and the following apply. 3.1 low temperature temperature lower than –20 °C 4 General For material selection and design of normal reinforced concrete and/or pre-stressed concrete structures, reference is made to EN 1992-1-1.

Dead Imposed Abnormal load Wind
Adverse Beneficial AdverseBeneficial
Normal action plus one accidental action 1,05 1,0 1,05 0 1,0 0,3 Accidental actions being, earthquake (SSE), blast overpressure, external impact, fire or leakage from inner tank.
7.3 Liquid tightness For liquid tightness, the following shall be considered: a) In case of a non-liquid tight liner/coating For concrete outer containers without a liquid tight liner or coating, the liquid tightness of the concrete shall be ensured by means of the minimum compression zone of 100 mm. b) In case of a liquid tight liner/coating Where a liquid tight liner/coating is applied (to ensure full tightness of the secondary container) then cracking of the concrete section shall be permitted within the limits specified by EN 1992-1-1. In such cases the crack width shall be calculated and the liner/coating shall be proven to be capable of ‘bridging’ a gap equal to 120 % of the crack width.

Vertical pre-stressing is not required. It can be combined with horizontal pre-stressing. The need for vertical pre-stressing depends on the tank design pressure, tank diameter, and associated permanent and transitional stresses within the concrete section. 8.3 Wall design The minimum wall thickness shall be determined so that:  adequate cover to all reinforcement and pre-stressing tendons shall be available;  space between the reinforcement and pre-stressing tendons shall be sufficient to ensure that a homogeneous, liquid tight concrete structure is obtained. 8.4 Steel roof liner The steel roof liner shall be anchored adequately to the concrete roof. NOTE The liner may act as formwork for the concrete and may also act compositely with the use of shear studs. The concrete may be built up in layers to prevent overstress of the liner (see also B.6) 8.5 Construction joints Attention shall be paid to the design and execution of the construction joints. The location and necessity shall be carefully planned to minimize the risk of poor jointing. For the areas where liquid tightness is to be assured, the contractor shall provide method statements based on proven working practices and where necessary, due to lack of evidence, the contractor shall carry out tests to demonstrate that the construction joint is liquid tight. 8.6 Position of tendons and wires For internal pre-stressing systems using buttresses and grouted tendons, due account of the emergency conditions, e.g. fire scenarios, shall be taken to determine the position of the pre-stressing system. NOTE 1 Tendons should be preferably placed, in the centre of the concrete wall for protection against external fires. The tendons shall be well protected from corrosion during the life of the tank. Grouting procedures shall be provided and agreed between the designer and contractor to provide adequate protection to the tendons. NOTE 2 In very aggressive environments, where additional protection is required, for the tendons, non-ferrous pre-stressing ducts may be considered. Reference is made to ‘Durable bonded post-tensioned bridges’ Concrete Society Report TR47 [12]. For non-bonded tendons, reference should be made to FIP recommendation 91 [13].
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