For that kind of tank, the temperature is controlled through high-performance jackets and mineral wool insulation placed on the outside. The required operating pressure is 1.9 bar and is achieved with an elliptical roof and reinforced materials. Their bottom is conical with a slope that reaches up to 60 and they have high hygiene standards on the inside surface. Their capacities and dimensions vary and are chosen according to the needs of each Company. In this category, there is also the bright beer tank (B.B.T.) which additionally has an elliptical bottom separated from UNITANK. The material of these tanks is stainless steel AISI 304 with internal finish 2B and external Satine with certificates of chemical analysis from the steel mill. The weldings are done with the Argon Tig method in a protective atmosphere of high-purity inert gas.