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BSI BS EN 14620-4:2025

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 -- Insulation components
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BSI BS EN 14620-4:2025

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 -- Insulation components

PUBLISH DATE 2025
PAGES 40
BSI BS EN 14620-4:2025
This document specifies the requirements for materials, design and installation of the insulation of refrigerated liquefied gas (RLG) storage tank systems. RLG storage tank systems store liquefied gas with a low boiling point, i.e. below normal ambient temperature. The concept of storing such products in liquid form and in non-pressurized tanks therefore depends on the combination of latent heat of vaporization and thermal insulation. Consequently, thermal insulation for RLG storage tank systems is not an ancillary part of the containment system (as for most ambient atmospheric hydrocarbon tanks) but it is an essential component and the storage tank system cannot operate without a properly designed, installed and maintained insulation system. The main functions of the insulation in RLG storage tank systems are: - to maintain the boil off due to heat in-leak at or below the specified limits; - to limit the thermal loading of the outer tank components, so to prevent both their sudden damage and premature ageing (e.g. due to external condensation and ice formation); - to prevent damage by frost heave of the foundation/soil beneath the tank base slab (in combination with the slab heating system for tanks resting at grade); - to minimize condensation and icing on the outer surfaces of the tank. A wide range of insulation materials is available. However, the material properties differ greatly amongst the various generically different materials and also within the same generic group of materials. Therefore, within the scope of this document, only general guidance on selection of materials is given. NOTE For general guidance on selection of materials, see Annex A. This document deals with the design and manufacture of site built, vertical, cylindrical, flat-bottomed tank systems for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and −196 °C.
SDO BSI: British Standards Institution
Document Number EN 14620-4
Publication Date May 2, 2025
Language en - English
Page Count 40
Revision Level
Supercedes
Committee PVE/15
Publish Date Document Id Type View
May 2, 2025 BS EN 14620-4:2025 Revision
Dec. 29, 2006 BS EN 14620-4:2006 Revision