S/F Underground Double Wall Oil Tank
S/F underground double wall oil tank is a safe, environmentally friendly, and cost-effective solution. S stands for steel, forming the inner tank that stores fuels like petroleum and diesel, while F represents FRP, the corrosion-resistant outer shell that isolates the tank from soil. Built with advanced equipment, it features an interlayer clearance with a high-precision monitoring system for continuous leak detection, ensuring safety and durability.
Product Introduction
The S/F Underground Double-Wall Oil Tank is a safe, environmentally friendly, and cost-effective fuel storage solution. S stands for steel, forming the inner tank that directly stores petroleum, diesel, and other fuels. F represents FRP (fiberglass-reinforced plastic), making up the outer shell, which is in contact with soil and provides corrosion resistance and isolation.
Manufactured with advanced equipment, this tank features an interlayer clearance between the steel and FRP layers. A high-precision monitoring system is connected to this space, continuously detecting potential leaks to enhance safety and environmental protection. The S/F Underground Double-Wall Oil Tank is widely used in fuel stations and industrial storage applications, offering long-term reliability and durability.

Product Specifications
Cubage | Diameter | Net weight | Length | Ground anchor | Bridle |
20m³ | 2000mm | 2.9t | 6770mm | 4 | 4 |
20m³ | 2400mm | 2.7t | 5053mm | 2 | 2 |
20m³ | 2600mm | 3.26t | 4428mm | 2 | 2 |
30m³ | 2400mm | 3.9t | 7078mm | 4 | 4 |
30m³ | 2600mm | 4.42t | 6192mm | 4 | 4 |
40m³ | 2600mm | 5.97t | 8050mm | 4 | 4 |
40m³ | 2800mm | 5.64t | 7090mm | 4 | 4 |
50m³ | 2600mm | 6.4t | 10100mm | 6 | 6 |
50m³ | 2800mm | 5.9t | 8700mm | 4 | 4 |
Product feature
Safety
- Inner layer – Made of 6-8mm thick Q235-B steel plate.
- Outside layer – Fiberglass-reinforced layer, 4mm thick, with high compressive resistance to shock, excellent corrosion resistance, and electrical erosion resistance.
- We adopt a patented processing method to create a 0.1mm gap between the two layers, forming a leakage inspection layer connected to a high-grade leakage inspection device. This system provides 24-hour continuous monitoring, effectively eliminating leakage risks.
Environmental protection
- Outside FRP layer ensures the leaked material does not directly contaminate soil and water.
- Outside FRP layer won’t be corroded by electrolysis with groundwater, saltwater.
- Outside FRP layer can’t be corroded by gasoline, diesel, leaded petrol.
- Easy to install leakage inspection device, just insert the probe into the inspection tube and connect to external monitor equipment to achieve 24 hours monitoring from time to time. Eliminate pollution risks.
- Easy inspection and maintenance with leakage inspection device, protect soil and water environment.
- Effective protection of the environment eliminates the need for post-high economic costs of environmental protection.
Economic practicality
- Service life of the S/F double wall oil tank is much longer, 3-5 times of the normal steel oil tank, 50 years minimum. Easy installation can shorten the construction period and reduce the cost.
- With remote monitoring system, daily and regular inspection is convenient. Digital control is easy to operate.
- The protection needs of S/F double wall oil tank is 1/10 of the normal steel oil tank, saving maintenance cost.
- Compared to the normal oil tank, the S/F double wall oil tank has much higher usage rate, high efficient use ensures performance price ratio.
- S/F double wall oil tank has efficient economy and efficient environmental performance. Can efficiently protect energy, exempt the serious harm and loss caused by oil leakage.


In addition to the above characteristics, double wall oil tanks can store other dangerous liquids. We can manufacture many types of similar products using the same process, widely used in underground storage rooms, sinks, etc.
Besides the national standards, Japanese standards are also adopted: the type/form can also meet the requirements of domestic customers, ensuring that the product from China reaches the international level.






Hebei Aoliande Chemical Equipment Co.,Ltd. is a company specialized in production and sales of complete sets of chemical equipment, complete sets of fiberglass product production lines, and meantime manufacture composite material and SMC products. We have got the certificate of management system CE, ISO9001, ISO14001, ISO45001and SGS certificate. Our FRP production line and products have been sold to all over the world, including the United States, Canada, Australia, Brazil, Japan, Germany, Russia, India, Malaysia, Indonesia, Egypt and other countries, winning the support and trust of new and old customers.
EPC chemical equipment series: Mannheim process complete sets of potassium sulfate production equipment, sodium sulfate production equipment, complete sets of sulfuric acid equipment, complete sets of calcium chloride production equipment;
EPC complete sets of FRP product production line series: microcomputer controlled complete set of FRP pipes, FRP tank filament winding production line, complete set of FRP grating production line, complete set of FRP pultruded profile production line, SF/FF oil tank production line.
Fiberglass product series: high, medium and low pressure FRP pipe, FRP tank, FRP tower, Polymer concrete cells, SF/FF double-layer oil tanks, FRP cooling tower, FRP SMC/BMC molded products, FRP pultrusion profiles and other customized fiberglass products, FRP anti-corrosion project, etc.
Hebei Aoliande Chemical Equipment Co.,Ltd. not only have manufacture ability, but also has design ability of material, structure and products, our company can provide customers with technical advice, supply of goods and material, transportation, installation supervision etc service.

