Heat insulation of the tanks can be made in case of necessity. As a rule it is applied for the tanks, storing products at high temperatures, and for smoothing the product’s temperature variations, that lead to the increase in the rate of evaporation losses.
Among these tanks, the most common are insulated water storage tanks and insulated tanks for hot water storage.
In our practice, the thermal insulation of tanks using quilted synthetic mineral fiber or mineral wool plates with protective metal coat is most in demand.
Heat insulation mass density: from 48 kg/m3. Horizontal attachment devices are provided on the tank wall. They are meant for fixing the heat insulation material with the galvanized wire. While installing the heat insulation plates our specialists pay special attention to their tightness with the attachment devices and the density of joints between the plates attached end-to-end. To ensure this we provide not less than 2 turns of wire (horizontal or crossed) at 50 sm’ distance from each other for each horizontal plate.
The heat insulated tank is covered on the outside by aluminum or zinc-plated steel sheets. The protective metal coat is arranged not less than 1 mm (for aluminum) and not less than 0.7 mm (for zinc-plated).
It is a quite often practice that we use plates of polyurethane foam or polyisocyanurate blocks, attached to the walls and/or the roof of a vertical tank for its heat insulation.
The insulation blocks are either attached to the tank by wire and fixing devices or fastened by gluing.
The heat insulation blocks are manufactured at special production plant and are made in the form, folded in the wall radius of the tank.
This method implies that polyurethane foam is poured under the metal protective coat at the construction site.
It is important to carefully choose the type of the heat insulation material depending on the air temperature and humidity at the construction site, physical, technical and heating characteristics.
EuroTankWorks applies the polyurethane foam pouring-in technology that enables to avoid deformation of the metal protective coat. Pouring-in is carried out in several stages, after each previous layer is settled down. It is also necessary to
Thermal insulation by rigid polyurethane foam sputtering pay attention to the adhesion characteristics of the polyurethane foam to the material of tank framework and the coat covering.
It is essential to correctly plan the thickness of the insulating layer while using this method. This can be done based on operation requirements and the type of polyurethane foam. We use special sputtering equipment, ensuring the lamination with each layer’s thickness between 8 and 12 mm. For the sake of providing the quality of heat insulation the laminating regime should be kept in a way to let each previous layer finish the foaming process before the next layer is put, because there should be a certain time period for creation of vapor seal coating.
The coils of cellular rubber are fastened to the walls and the roof of the tank by gluing. It is important to work the surface of the tank and to lay a ground. Our technology implies that the coils’ joints are glued with special heat-insulating strip.
