サンフロイント List of Products and Services

We would like to introduce our "Lining Construction for Solvent Tanks." We apply materials that can withstand various solvents to the entire inner surface of the tank, completely shutting out any leakage of the tank contents to the outside. Lining for hydrocarbons such as toluene and xylene, as well as alcohols and industrial gasoline, is also possible. We apply the extensive construction experience and know-how we have cultivated through tank lining to solvent tanks as well. Please feel free to consult us when needed. 【Items that can be lined】 ■ Hydrocarbons ■ Alcohols ■ Aromatic and ester compounds ■ Ketones ■ Ether glycol compounds, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

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 confirmed in the small space between the outer FRP shell and the inner steel shell of the SF double-walled tanks. Even if the cause is identified and the leakage point is repaired, there are cases where new abnormalities appear elsewhere, or abnormalities in different locations 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. Our company's "Underground Storage Tank Leakage Detection Device with Inner FRP Double-Wall Structure" offers a low-cost solution to these problems. 【Benefits】 - There is no need to repair each location every time an abnormality is detected. - The number of facilities that cannot be repaired due to economic reasons decreases, reducing the risk of accidents. - Even facilities that cannot be inspected frequently can be safely monitored from a remote location. *For more details, please download the PDF or contact us.

• Special Construction Method

The "Leak Detection Device Equipped Underground Buried Resin Double-Shell Piping" features a structure that incorporates sensors in the gap between the inner oil transport (main) pipe and the outer shell pipe of the double-shell piping. Patent: No. 4421711, Utility Model: No. 3183085, Patent Application: 2014-235598, Patent Application: 2015-115624 - Double Piping Structure Utility Model: No. 3195379, Patent Application: 2014-176033, Utility Model Application: 2014-005777 - Piping Structure [Features] ■ Pinpoint detection of leaks from external water and internal fuel oil ■ Doubling the piping significantly reduces the risk of fuel oil leaks (environmental pollution) ■ Repairs can be made to the faulty areas before any harm occurs, among others *For more details, please download the PDF or contact us.

• Piping materials (plastic pipes)

The "Leak Detection Device Equipped Underground Buried Resin Double-Shell Piping" features a structure that incorporates sensors in the gap between the inner oil transport (main) pipe and the outer shell pipe of the double-shell piping. This technology allows for pinpoint detection of leaks from external water and internal fuel oil, enabling repairs to be made before any actual damage occurs. Currently, resin piping is mainstream, and by doubling the piping, it significantly reduces the risk of fuel oil leaks (environmental pollution), making it suitable for suction pipes and oil supply pipes that transport fuel oil. 【Features】 ■ Pinpoint detection of leaks from external water and internal fuel oil ■ Doubling the piping significantly reduces the risk of fuel oil leaks (environmental pollution) ■ Repairs can be made before any damage occurs, etc. *For more details, please download the PDF or contact us.

• Piping materials (plastic pipes)

"The underground buried tank leakage detection device with an inner FRP double-shell structure" applies a newly designed three-dimensional cross-structured FRP lining to the inside of the tank, installing sensors in that space to continuously monitor for hazardous material leaks. This allows for the provision of functions equivalent to SF double-shell tanks at a lower cost and more quickly. This is a unique technology from Sunfroint that addresses issues such as "repairs are costly, so not much can be done" and "tank replacement takes time." 【Features】 ■ No need for repairs at each location every time an anomaly is detected ■ Safe monitoring possible from remote locations even in facilities that cannot be inspected frequently ■ Continuous monitoring of leaks inside the underground tank, etc. *For more details, please download the PDF or contact us.

• Special Construction Method

During leakage inspections of underground tanks, abnormalities in pressure fluctuations have been confirmed in the small space between the outer shell of SF double-shell tanks made of FRP and the inner shell made of steel. However, even after identifying the cause and the leakage point and repairing it, there are cases where new abnormalities appear in different locations, or abnormalities in other areas are confirmed years after the first repair. Currently, there is no guarantee that past repair work will be completed in one go. As solutions, options such as "excavating the tank above ground, completely removing the old outer FRP shell, and remaking the outer shell with FRP" or "replacing it with a new tank" exist, but the costs for materials and construction are high, making them impractical. Therefore, by implementing our "inner FRP double-shell structure," it is possible to achieve significant cost reductions and shorten construction periods, as there is no need for tank replacement or excavation. 【Features】 - No need for repairs at each location every time an abnormality is detected - Safe confirmation from remote locations even in facilities that cannot be inspected frequently - Continuous monitoring of leaks inside the underground tank, among others *For more details, please download the PDF or contact us.

• Special Construction Method

By inserting a fiberscope from the top of the tank and checking the internal condition, it is possible to detect the presence of foreign objects, corrosion, welding defects, and other issues. 【Issues Due to Aging】 Steel single-shell tanks buried underground can experience corrosion over 20 to 30 years, depending on the surrounding environment, leading to a rapidly increasing risk of hazardous material leakage. 【Investigation to Understand Current Conditions】 The current state of underground tanks will be investigated using a fiberscope. It is not uncommon for the interiors of aging tanks to show significant rust and corrosion. - What can be understood through a combination of airtightness testing and fiberscope inspection - ● The condition of foreign objects and deposits inside the tank and piping ● The presence and condition of corrosion and pitting inside the tank and piping ● The integrity of welded joints in the piping *For more details, please contact us or download the PDF materials for review.

• Structural Survey

This method involves running a pig through the piping using water pressure or gas pressure to perform cleaning and lining within the pipes. 【Features of the Construction】 ● Low Cost and High Durability It is cheaper than new installation and has durability that exceeds that of new installations. ● Flow Rate Recovery The flow rate is restored, and the piping is beautifully regenerated. For more details, please contact us or download the PDF materials to view.

• Special Construction Method

This is a structure that incorporates sensors into the gap between the inner pipe of the double-shell piping and the outer shell pipe. This technology allows for pinpoint detection of leaks from external water and internal fuel oil, enabling repairs to the faulty areas before any actual damage occurs. Patent: No. 4421711, Utility Model: No. 3183085, Patent Application: 2014-235598, Patent Application: 2015-115624 - Double Piping Structure Utility Model: No. 3195379, Patent Application: 2014-176033, Utility Model Application: 2014-005777 - Piping Structure ■ Single Shell Piping Resin piping is developed for the transportation of fuels such as petroleum products. It is also suitable for organic solvents and achieves high hydrocarbon durability. ■ Double Shell Piping This is a piping structure that places an outer shell pipe over the inner shell pipe (single shell piping). By doubling the piping, the risk of fuel oil leakage (environmental pollution) can be dramatically reduced, making it suitable for suction pipes and oil supply pipes that serve as pathways for fuel oil. *For more details, please contact us or download the PDF materials for review.

• Piping materials (plastic pipes)

In the event of an anomaly in the outer shell FRP of an existing SF double-shell tank, a new three-dimensional cross-structured 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 materials 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 for the provision of functions equivalent to those of an SF double-shell tank at a lower cost and more quickly. 【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. ■ Even facilities that cannot be inspected frequently can 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.

• Special Construction Method

The FRP lining construction of solvent tanks uses resin that is resistant to various solvents, and by applying FRP to the inner surface of the tank, it prevents leakage of the contents outside the tank. ● For more details, please contact us or download the PDF materials to view.

• Special Construction Method

We are enhancing our range of products related to hazardous material leak prevention measures, focusing on underground tanks and piping, so that owners of hazardous material storage facilities can conduct their businesses with peace of mind. With many years of rich experience and reliable technology, we hope to be of assistance to you in any way we can. 【Contents】 ● FRP lining construction for underground tanks, etc. (Patent No. 3594183) ● Piping lining ● Construction of solvent tanks (Patent application 2014-185015; Utility model No. 3200043) ● Steel tank inner surface FRP double-shell structure [with leak detection device] (Japan - Patent application 2012-256961; Utility model No. 3196696) (Australia - Patent No. 2012-101365) ● Manufacturing and sales of FRP sheets (for hazardous material facilities)

• Piping and electrical wiring materials

FRP lining completely prevents hazardous material leakage by applying FRP to the inner surface of the tank. The FRP lining sheet method involves attaching FRP sheets made of oil and chemical-resistant materials, which are manufactured in a factory, to the inside of the tank and curing them with ultraviolet light, ensuring that there is no corrosion from the inside for a semi-permanent period. Once completed, it functions similarly to a double-shelled tank. <Features of the Construction> ■ Tank inner surface lining (sheet method) Unlike liquid FRP hand application (hand lay-up method), which can lead to uneven thickness due to liquid dripping on the tank's top surface, this method ensures uniform thickness and high construction quality. ■ FRP cures with light (ultraviolet) [20-30 minutes] There is no heat generated during the curing of FRP, preventing any issues with the exterior protective material. Construction is possible even in winter. ■ Short construction period Two 10KL tanks can be constructed simultaneously in 5 to 10 days. (Depending on the presence of inspection openings) *For more details, please download the catalog or feel free to contact us.

• Piping and electrical wiring materials