Underground buried tank with leak detection device, inner surface FRP double-shell structure.
It is a patented technology exclusive to Sanfroit.
In the event of an anomaly in the outer shell FRP of an existing SF double-shell tank, a new three-dimensional cross-structure FRP lining will be applied to the inner surface of the inner shell steel, and a sensor (a device for detecting minor leaks of hazardous substances in underground buried piping (constant monitoring equipment) evaluation number: All Hazardous Materials Association Evaluation No. 22) will be installed in that space to continuously monitor for leaks of hazardous materials. This allows us to provide the same functionality as an SF double-shell tank quickly and at a low cost. 【Benefits】 ■ There will be no need to repair each location every time an anomaly is detected. ■ The number of facilities that cannot be repaired for economic reasons will decrease, reducing the risk of accidents. ■ Facilities that cannot be inspected frequently can still be safely monitored from a remote location. * For specific background information, please refer to the basic information below. 【Features】 ■ Patented in Japan and Australia ■ Continuous monitoring of leaks inside underground tanks 【Japan】 Steel tank inner surface FRP double-shell structure (with leak detection device) Patent: No. 6134128 Utility Model: No. 3196696 【Australia】 Steel tank inner surface FRP double-shell structure (with leak detection device) Patent: No. 2012-101365 * For more details, please contact us or download the PDF materials for review.
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basic information
Underground tanks at facilities handling hazardous materials such as SS have been equipped with SF double-walled tanks since around 1994, and as of March 31, 2011, a total of 41,572 SF double-walled tanks have been installed. In this situation, during leakage inspections of underground tanks, abnormal pressure fluctuations have been observed in the small space between the outer shell made of FRP and the inner shell made of steel of the SF double-walled tanks. Even if the cause is identified and the leakage point is repaired, there are cases where new abnormalities arise in different locations, or where abnormalities in other areas are confirmed several years after the first repair, making it impossible to guarantee that past repair work will be completed in one go. However, the fire department is also struggling with the reality that they cannot provide strong guidance due to economic issues. From the above examples, it cannot be said that simply repairing the leakage points is sufficient. ▼ Possible Measures 1. Excavate the SF double-walled underground tank where abnormalities have been detected, completely remove the old outer shell made of FRP, and reconstruct the outer shell with FRP again. 2. Excavate the SF double-walled underground tank where abnormalities have been detected and replace it with a new tank. The above methods are costly due to tank costs, material costs, and construction expenses, making them impractical in reality. 3. As a realistic measure, implement the inner FRP double-walled structure.
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Currently, environmental destruction due to global warming is progressing on a global scale. In this context, our country is experiencing leakage accidents at aging hazardous material storage facilities in various locations, and soil contamination has become a serious social issue. Additionally, due to amendments to the Fire Service Act concerning underground storage tanks, leakage prevention measures are now mandatory. The government is also actively implementing measures for soil contamination environmental conservation projects at fueling facilities, including bearing part of the subsidies. However, soil conservation measures must be addressed as a problem that requires cooperation between the public and private sectors. Our company is enhancing related products for leakage prevention measures, focusing on underground tanks and piping, so that owners of hazardous material storage facilities can operate their businesses with peace of mind. We hope to be of assistance to everyone with our many years of rich experience and reliable technology. ● FRP lining construction for underground tanks, etc. (Patent No. 3594183) ● Piping lining ● Construction of solvent tanks (Patent application 2014-185015; Utility model application 2015-003503) ● Steel tank inner surface FRP double-shell structure [with leakage detection device] (Patent application Japan 2012-256961; Utility model No. 3196696) (Patent Australia No. 2012-101365)