BS EN 14620-4:2025 - TC, 2025

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BSI

BS EN 14620-4:2025 - TC Tracked Changes. 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 - Insulation components

Edition: 2025

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Description
About BSI

Description of BS EN 14620-4:2025 - TC 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.

Standard Number	BS EN 14620-4:2025 - TC
Title	Tracked Changes. 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 - Insulation components
Status	Definitive
Publication Date	2025-05-14
Descriptors	Design, Vertical, Containers, Installation, Gas pressure vessels, Thermal properties of materials, Bottom, Flat (shape), Thermal insulating materials, Pressure vessels, Tanks (containers), Steels, Mathematical calculations, Thermal insulation, Bulk storage containers, Structural design, Liquefied gases, Low temperatures, Cylindrical shape, Refrigeration, Inspection
ICS	23.020.10 Stationary containers and tanks
Committee	PVE/15
ISBN	978 0 539 37036 2
Publisher	BSI
Pages	91

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.

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