Advantages and Production Process of SF Double-Layer Oil Storage Tanks
SF, which stands for Steel Fiber Reinforced Plastic (FRP) multi-layer oil storage tanks, is a double-layer oil storage tank formed by adding a layer of FRP (fiber-reinforced plastic) anti-seepage enclosure on the outer layer of a single-layer steel oil tank. There is a continuous gap between the steel inner tank and the FRP outer tank. The structure of SF storage tanks:
Structural features:
Forming a double-layer composite structure: consisting of a steel inner tank and an FRP outer tank, with a certain gap between the two layers, and independent monitoring space. Inner layer: The inner tank is made of high-strength steel, suitable for storing oil products; Outside
The tank is made of FRP material, which has the advantages of corrosion resistance, anti-aging, and adaptability to complex environments.
Layer: The thickness of the reinforcing fiber layer exceeds 4 millimeters. It has excellent compressive strength and seismic performance, as well as corrosion resistance and stability.
Gap monitoring design: The gap can be filled with gas or a monitoring system can be installed. The gap detector can conduct 24-hour real-time monitoring. When the bottom position of the gap fluid is detected, an alarm material will be triggered.
Characteristic combination: The inner tank is made of high-strength steel, suitable for storing oil products; the outer tank is made of FRP material that is corrosion-resistant, anti-aging, and adaptable to complex environments. Overall
Sealing: The seams and welds of the tank body have undergone special treatment to ensure the sealing performance of the double-layer structure and reduce the risk of leakage.
The size is similar to that of traditional single-tank storage tanks, saving installation space and facilitating transportation and on-site construction.
Safety features:
If the inner tank of the double-layer tank leaks, a certain pressure of gas or liquid will enter the atmospheric inner tank; the pressure or liquid level inside the double-layer tank will change, triggering an audible and visual alarm. Since the outer tank remains intact, the leaked liquid will not be interrupted after flowing into the gap, thus ensuring the safety of the stored liquid, soil, and groundwater.
If the outer tank leaks, a certain pressure of gas or detection liquid will seep through the gap into the soil. At the same time, the pressure or liquid level in the gap will also change, triggering an audible and visual alarm. At this time, since the inner tank has not leaked, the stored liquid is safe; only when gas or liquid is detected to seep into the soil will the soil and groundwater be contaminated.
Since the liquid stored inside the tank and the soil and groundwater in contact with the tank outside are different media, the corrosion rate of the tank body material is also different. Therefore, the probability of simultaneous leakage is almost certain. Thus, it can prevent the leakage of the liquid stored in the tank body, thereby achieving production safety and environmental protection. SF
The installation of double-layer oil tanks is meticulous, significantly shortening the construction period and reducing the investment cost. The remote oil monitoring system requires cost inspection and digital control, involving complex manual operations. The protection requirements for SF double-layer oil tanks are only one-tenth of those for ordinary oil tanks, greatly saving maintenance investment. The comprehensive and well-protected environmental performance of SF double-layer oil tanks can effectively save energy and prevent energy leakage from causing serious pollution and losses. SF
The price advantage of double-layer oil tanks has also promoted their wide application. In contrast, the price of FF double-layer oil tanks is too high. For example, in the underground storage tank market in Japan, steel single-layer oil tanks account for only 5%, while the investment in SF double-layer oil tanks is as high as 75%, and FF double-layer oil tanks account for only 5%. Clearly, this is because the price of FF double-layer oil tanks is too high. At the same time, stainless steel double-layer oil tanks cannot solve the problem of further corrosion on the outer layer, and subsequently, cannot meet the requirements of energy conservation and environmental protection. Therefore, SF double-layer oil tanks will still maintain a leading position in the market for a long time in the future. Production flowchart:
Steel shell
Welding → Installation of flange accessories → Shell leakage test → Sandblasting and rust removal of the outer surface → Thin-wall rust-proof spraying → Thickness film treatment → Overall FRP spraying of the shell → Drying → Special components FRP treatment → Drying → Check the thickness gap of the film → Gap pressure and depressurization test → Qualified → Storage
