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1. Semi-refrigerated tanks
This storage method is reserved for liquefied gases, which develop high pressures at ambient temperature. These products are stored at a reduced operating pressure, obtained by lowering their temperature using refrigeration machines.
The advantage of this type of storage lies in the increased capacity it affords, thanks to the reduced wall thickness associated with low operating pressures. The quantity of product that can be stored in each unit is increased not only by the greater volume allowed, but also by the higher density of liquids at these temperatures.
The chosen storage temperature lies between that of the fully pressurized product at ambient temperature and that of the fully refrigerated product at its normal boiling point (BM 6 590, figure 1). Generally speaking,...
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Semi-refrigerated tanks
Refrigerated and cryogenic tanks
1. Design and construction codes
1.1 Storage at ambient temperature. Atmospheric tanks
The best-known and most frequently used codes and standards are as follows:
• Code CODRES (France) drawn up by the Syndicat National de la Chaudronnerie, de la Tôlerie et de la Tuyauterie Industrielle (SNCT) and the Union des Chambres Syndicales de l'Industrie du Pétrole (UCSIP).
...
2. Quality of steels used
2.1 Storage at room temperature
Atmospheric tanks
Low- and high-pressure reservoirs
The steels used are generally selected from those covered by the following standards:
• structural steels (atmospheric and low-pressure tanks)
NF EN 10 025 (France): this...
References
Standards and regulations
French Standards Association (AFNOR)
- Produits laminés à chaud en aciers de construction non alliés. Conditions techniques de livraison - Indice de classement : A 35-501 (remplace NF A 35-501). - NF EN 10025 -
- Produits plats en acier pour appareils à pression. Indice de classement : A 36-205. - NF EN 10028 -
- Prescriptions générales. - Partie 1 -
- Aciers non alliés...
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