Steel tank is the best option for storing and maintaining some fluids, including chemical, pharmaceutical, food, sanitary, acid, etc. And the type of fluid that is supposed to be stored inside the steel tank determines the sheet grade used in the design and production of the steel tank. If we want to store the sides inside, we should definitely use grade 300 and above sheet; Due to the use of stainless steel, the steel tank has a higher price than other tanks, but it is also necessary to mention that the durability of this category of tanks is higher compared to environmental factors. It is also a better option in terms of beauty.
Reservoir polishing methods
One of the methods used to achieve this smoothness is the tank polishing and sanding machine made in Raya Sanat Dana Company; In these devices, it is possible to use belt sander or sander and scotch tape, which rotate at a very high speed and also move back and forth automatically on the inner or outer surface of the tank, to the smoothness of the surface suitable for the standards of food industry tanks. and pharmaceutical and other standards achieved.
Another method is the brushing mill
In grinding, the use of abrasive materials that are attached to belts and discs that are cut in one direction, and which collide with the surface of the workpiece, is obtained. The average roughness of this process varies depending on the application. This is usually done in stainless steel tanks, where it is necessary to have a proper surface of the inner walls to create a proper flow of the material during mixing or stirring.
Electro polishing
Electropolishing is a chemical and electrical process that removes or aligns microscopic bumps on a metal surface. This is done by immersing the metal in an electrolyte bath. Then this metal is connected to the power source along with a cathode immersed in the electrolyte. As the current passes through the metal, the surface of the tank dissolves in the electrolyte solution. Microscopic surface bumps dissolve faster than flat areas. Finally, the surface is smoothed on the order of less than 0.2 (two tenths) of a micron. Electropolished stainless steel tanks are used in the food and pharmaceutical industries where product contamination is a concern. The surface of the tank should be smooth enough so that moisture cannot remain because moisture causes the growth of microbes.
The use of polished tanks
Fuel Tanks
Fuels such as gasoline, diesel, oil and diesel fuel are among the materials that should be transported with special fuel tanks due to their inflammability. The body of these tanks is usually made of steel sheet with a thickness of 3 mm and their lens is made of the same material with a thickness of 4 mm. The process of making fuel tanks is that the steel sheets are first cut and bent in certain dimensions and finally they are placed next to each other and welded. These tanks consist of three exits, the purpose of which is to improve the refueling and emptying process.
Bitumen tanks
Acid transport tanks
Substances such as sulfuric acid and phosphoric acid are things that must be handled in a special way when it comes to their transportation and storage; Carrying them is not an easy task due to their characteristics such as corrosive properties, and the slightest mistake in this matter causes serious and harmful problems for the surrounding environment and humans. If water gets into these materials, it will easily cause the creation of an explosive material with high destruction intensity. Therefore, the transportation and storage of these acids should be done using special tanks for transporting acids. Depending on the acid concentration, these tanks can be made of steel or acid-resistant steel sheet (316 steel sheet). The thickness of the sheet used in the construction of the body and lens of these tanks is five millimeters, and their capacity varies according to the density of the acid.
Transportation of food, pharmaceutical and chemical
Food, beverage, pharmaceutical and chemical industries use steel tanks in the production, storage and transportation of their products. The production materials of these industries are usually very sensitive and are in direct contact with the body of the tanks. Therefore, the type of tanks must have requirements such as being hygienic and washing regularly to eliminate the possibility of risks and damages. These tanks are usually designed and made of stainless steel as single and double walls. The price of steel sheet 316 is much more expensive compared to alloys such as 304 and 430, but in terms of food, pharmaceutical and chemical materials, the quality of the manufacturing materials is important and the cost is not important. These houses are built in different shapes and capacities according to their type and use.