EN 14620-4:2006

EN 14620-4:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "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 4: Insulation components". This standard covers: This European Standard specifies the requirements for materials, design and installation of the insulation of refrigerated liquefied gas (RLG) storage tanks. RLG storage tanks 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 tanks 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 cannot operate without a properly designed, installed and maintained insulation system. The main functions of the insulation in RLG storage tanks are: ¾ to maintain the boil off below the specific limits; ¾ to protect the non low temperature parts/materials of the tank (mainly the outer tank) by maintaining these parts at their required ambient temperature; ¾ to limit the cool-down of the foundations/soil underneath the tank to prevent damage by frost heave; ¾ to prevent/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 European Standard, only general guidance on selection of materials is given. NOTE For general guidance on selection of materials see Annex A. 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.

This European Standard specifies the requirements for materials, design and installation of the insulation of refrigerated liquefied gas (RLG) storage tanks. RLG storage tanks 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 tanks 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 cannot operate without a properly designed, installed and maintained insulation system. The main functions of the insulation in RLG storage tanks are: ¾ to maintain the boil off below the specific limits; ¾ to protect the non low temperature parts/materials of the tank (mainly the outer tank) by maintaining these parts at their required ambient temperature; ¾ to limit the cool-down of the foundations/soil underneath the tank to prevent damage by frost heave; ¾ to prevent/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 European Standard, only general guidance on selection of materials is given. NOTE For general guidance on selection of materials see Annex A. 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.

EN 14620-4:2006 is classified under the following ICS (International Classification for Standards) categories: 23.020.10 - Stationary containers and tanks. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 14620-4:2006 has the following relationships with other standards: It is inter standard links to EN 14620-4:2025, ISO 8302:1991, ISO 4897:1985, ISO 8301:1991, ISO 844:2004, ISO 830:1999, EN 13763-19:2003, EN 12066:1997, EN ISO 16546:2020, EN ISO 4590:2016, EN ISO 13680:2010, EN ISO 16534:2020, EN ISO 16536:2019, EN ISO 4624:2023, EN 1607:2013. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

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