Underground tank is most commonly used to store specific liquids in various industries. Its use eliminates the influence of external factors on the content, allowing you to preserve the properties of the product for a long time.
Reservoir application area
Underground tanks are used not only in industries, but also in people's daily lives. They are often used as fire tanks in businesses where there is no water source. In industry, an underground reservoir is used to store petroleum products, acids, fuels and lubricants, oils, drinking and process water. They are located strictly horizontally, on a concrete base. In the oil refining sector, the main purpose is to preserve products obtained from oil refining. The underground location of the container reduces the possibility of contamination of the surrounding area and protects the contents from exposure to high temperatures in the summer. Also, underground storage of containers allows you to significantly free up production space and use them with maximum efficiency.
Devicetank
The underground tank is equipped with two manholes. Through one, liquid is filled and taken, the second is designed to inspect the tank and assess its condition. Each tank has sensors that detect temperature, pressure and fuel level. Filling or withdrawing liquid is carried out using special pumps equipped with an explosion-proof system.
When constructing an underground reservoir, it is taken into account that the ambient temperature may fall below the freezing temperature of the stored fuel. In this regard, the tanks are equipped with a heating system. If they are located in the northern regions, then the pit in which the tank is located is equipped with a heating system. Also, the pit should be at a depth below the freezing level of the soil. Such measures are necessary to keep warm and reduce the impact of climatic conditions on the contents of the tank.
Among other things, the underground tank is equipped with instruments that determine the pressure, temperature and level of the liquid inside. Sampling and content indicators are also available.
Views
The tank is a steel container. Depending on the future content, they are produced with different bottoms. The flat bottom cylinder is designed for storage of products containing oil, the pressure of which does not exceed 40 kPa. The conical bottom makes it possible to store the same combustible substances with a pressure of up to 70 kPa. Also, depending on the purpose, the tanks can be single-walled or double-walled. Firstare most often used for the storage of technical or drinking water. Double-walled tanks are used for aggressive liquids.
Installation of underground steel tanks for water storage reduces liquid losses due to the influence of solar radiation, reduces heat losses, and also due to the underground location allows rational use of the area of industrial enterprises. Oil storage tanks help protect the fuel from external influences. It is also necessary to provide for the construction of an access road in case of an emergency and the need to pump out fuel. Underground tanks are designed for operation in temperature conditions from -40 to +40 degrees Celsius and air humidity up to 80%.
Installation
The tank is installed on a specially prepared site. The bottom of the pit is equipped with a sand cushion up to 30 centimeters thick and compacted with gravel. Then a layer of waterproofing is laid and the site is poured with concrete. The thickness of the concrete cushion should not be less than 20 centimeters.
The height of the well depends on the height of the tank, and the layer of earth above the tank should be up to 1.2 meters. The well is covered with a reinforced concrete slab with holes for hatches. The surface of the slab must be insulated; for this, bitumen is usually used, which is hot applied to the surface. For bringing to the surface of the hatches of the tank in the holes of the platecast-iron hatches are installed, and wells made of bricks measuring 2 x 2 meters are made around them. The surface near the wells must be equipped. To do this, a blind area is made of stone, fastened with concrete mortar, and after hardening, a layer of sand is laid. The walls of the well are also treated with liquid bitumen.
The construction of underground reservoirs is carried out taking into account the terrain. In this case, such factors are taken into account: maximum summer and minimum winter temperatures, wind rose, maximum snow load and type of soil. If there is a large percentage of groundwater in the ground, then the containers are additionally attached to a concrete base.
Replacement of tanks
The service life of underground tanks depends on the type of liquid they store and can range from 10 to 50 years. Despite the fact that these tanks are intended for underground use, metal corrosion occurs sooner or later. The dismantling of the underground tank must be carried out by specialists using special equipment, since there is a danger of poisoning with toxic vapors and gases. The removed tank is sent for disposal, and the room in which it was located is cleaned for further use.
Benefits of underground tanks
Currently, tanks are in great demand due to their advantages. When using such storages, a significant place remains on the territory of enterprises, and the contentstanks is not exposed to external factors and retains its properties for a long time. The location of the tanks below the surface of the earth allows you to protect fuel or other liquids from temperature extremes and possible seismic activity.
