Steel sealed containers used for storing liquids or gases are called steel storage tanks. Steel storage tank engineering is an essential and important infrastructure in industries such as petroleum, chemical, grain and oil, food, fire protection, transportation, metallurgy, and national defense. Our economic life always relies on steel storage tanks of all sizes, and the important role played by steel storage tanks in the development of the national economy is irreplaceable. With the continuous development of the storage tank industry, more and more industries and enterprises are using storage tanks, and more and more enterprises are entering the storage tank industry. Steel storage tanks are specialized equipment for storing various liquid (or gas) raw materials and finished products. For many enterprises, normal production cannot be achieved without storage tanks, especially for national strategic material reserves, which cannot do without storage tanks of various capacities and types. Our country's oil storage facilities are mainly composed of above ground storage tanks, and are mostly made of metal structures.

purpose

A storage tank is a storage container for the medium transported by long-distance oil and gas pipelines. The oil storage tanks at the first station of the oil pipeline are used to collect and store oil and ensure the stability of pipeline oil transportation. The oil storage tanks at the last station are used to receive and store incoming oil and provide it to the oil using units. The gas storage tanks at the terminal gate stations of gas pipelines are mainly used for peak shaving of urban gas and are gradually being replaced by underground gas storage and pipeline gas storage.

Process production
1. Suitable for molding large and extra large parts

The vast majority of plastic molding processes involve plastic and molds being subjected to considerable pressure during the molding process, such as injection molding, compression molding, extrusion, and extrusion molding, which are widely used. Therefore, when using these molding processes to produce large plastic parts, it is not only necessary to use molds that can withstand high pressure, making the molds bulky and complex, but also plastic molding equipment must be designed and manufactured very firmly, increasing the difficulty and cost of mold processing and manufacturing. On the contrary, anti-corrosion storage tanks only require the strength of the frame to support the weight of materials, molds, and the frame itself, as well as the closing force to prevent material leakage, due to the rotational molding process. Therefore, even for large and extra large plastic parts, anti-corrosion storage tanks do not need to use very bulky equipment and molds. The processing and manufacturing of machine molds are very convenient, with short manufacturing cycles and low costs. 1. In theory, there is almost no upper limit on the size of parts formed by rotational molding process. But it is easily limited by production conditions and road transportation. It is impossible to produce such large plastic containers using blow molding without expensive and bulky blow molding equipment.

2. Anti corrosion storage tanks are suitable for multiple varieties

Production of small batches of plastic products. Due to the fact that the mold used for rotational molding is not subjected to external forces, the mold is simple, inexpensive, and easy to manufacture. In addition, the rotational molding equipment also has great maneuverability. One rotational molding machine can install a large mold and arrange multiple small chess pieces; It can not only mold parts of different sizes, but also simultaneously mold products of extremely different sizes and shapes. As long as the raw materials used for the rotational molding products are the same and the product thickness is the same, they can be molded simultaneously. Therefore, the rotational molding process for anti-corrosion storage tanks has greater flexibility compared to other molding methods. 3. Roll molding can easily change the color of the product. Roll molding involves adding materials directly into the mold each time, allowing all materials to enter the finished product. After the product is removed from the mold, the materials needed for the next molding are added. Therefore, when we need to change the color of the product, we do not waste any drops of raw materials or spend time cleaning the machine and mold anti-corrosion storage tank. When using multiple molds to roll shape the same plastic product, we can also add materials of different colors to different molds and roll shape plastic products of different colors.

process

(1) Processing technology of polyethylene storage tank:

Polyethylene (PE) horizontal storage tanks are made of pure polyethylene (linear low-density polyethylene LLDPE, high-density polyethylene HDPE) as raw materials, and are formed in one go using rotational molding technology.

(2) Processing technology for steel lined plastic storage tanks:

Steel lined plastic vertical storage tank, also known as tortoise shell lined storage tank (tortoise shell lining - steel, mesh, plastic three in one) is the essence of steel plastic composite products. It adopts a special rotational molding process. It is a process of welding steel mesh (turtle shell) onto the surface of steel body, using pure polyethylene (linear low-density polyethylene LLDPE, high-density polyethylene HDPE) as raw material, and organically combining steel plate, steel mesh (turtle shell) and polyethylene through rotational molding technology. Polyethylene firmly adheres to the surface of the steel body. The product has the advantages of no welding seam, no leakage, non-toxic, anti-aging, impact resistance, corrosion resistance, long service life, and compliance with health standards. It makes up for the disadvantages of poor rigidity and strength, non pressure resistance, and temperature difference resistance of all plastic rotational molding storage tanks.