
Determining the amount of fuel in a storage tank is a crucial aspect of fuel management. While fuel gauges provide an approximate reading, they may not always be accurate. To ascertain the precise amount of fuel, calculations involving the volume of the tank and the density of the fuel are necessary. Various methods, such as using a dipstick, a sight glass, or mathematical formulas, can be employed to determine the volume of fuel in a tank. Understanding the geometry of the tank, whether it be cylindrical, rectangular, or oval, is essential for accurate calculations. This knowledge empowers individuals to make informed decisions about their fuel usage and ensures they are prepared for refuelling when necessary.
| Characteristics | Values |
|---|---|
| Materials | Aluminum, high-carbon steel, hard plastic, fiberglass, HDPE plastic |
| Capacity | 119–18,000+ gallons |
| Use | Storage of flammable fluids, often gasoline or diesel fuel |
| Filling | Must be done securely, without sparks |
| Safety | Keep at least 50 feet away from pilot lights and ignition sources; install on the floor out of children's reach; store in a garage or shed, away from direct sunlight |
| Accessories | Pumps, gauges, hose reels, solar panel kits, lockable pump bays, dispensing packages, fuel management systems |
| Protection | Vapor recovery systems, BattleJacket, rubber bladders |
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What You'll Learn

Fuel storage tank sizes
Fuel storage tanks come in a variety of sizes, depending on their intended use. For example, residential gasoline storage tanks are typically much smaller than those used for industrial purposes.
For residential use, the Federal Government's official guidelines recommend semi-portable tanks with a capacity of 10-50 gallons for storing gasoline. These tanks should be made from approved materials such as aluminium, high-carbon steel, hard plastic, or fibreglass, and labelled "gasoline". It is important to follow safety guidelines when storing gasoline at home, such as keeping the tanks away from ignition sources and out of direct sunlight.
For industrial use, fuel storage tanks can range from 119 to over 18,000 gallons in capacity. The size of the tank depends on the specific needs of the operation. For example, a smaller, more transportable tank, such as the FuelCube Type-S with a capacity of 119 gallons, might be suitable for a small operation that requires maximum versatility. On the other hand, a larger, stationary tank might be more suitable for long-term applications such as mining.
The TransCube Global, with a capacity ranging from 250 to 1,200 gallons, is a portable solution that allows for fuel dispensing while simultaneously feeding into multiple pieces of equipment. For even greater capacity, the TransTank Pro tanks can be linked together to provide unlimited fuel storage, creating a Fuel Farm.
When choosing a fuel storage tank, it is important to consider the amount of fuel used between fuel drops, the desired level of transportability, and the specific applications for which the fuel will be used.
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Fuel tank safety
Location
On-site fuel storage tanks should be installed in a suitable location away from potential hazards such as ignition sources, high-traffic areas, and buildings.
Maintenance and Inspection
Regular maintenance and inspection of fuel tanks and their components are crucial to ensure they are free from defects or damage that could lead to leaks or malfunctions. This includes checking for signs of corrosion, leaks, or structural damage, as well as ensuring that all components, such as valves, pumps, and gauges, are in proper working order. Detailed records of inspections, maintenance, and repairs should be maintained for reference and compliance purposes.
Fuel Transfer
Specialized containers and equipment designed for fuel transfer should be used to minimize the risk of spills and accidents. All fuel transfer connections and valves should be properly secured and regularly inspected and maintained to ensure they are in good working condition.
Fire Safety
Fire safety equipment, such as fire extinguishers, fire alarms, and smoke detectors, should be installed in the vicinity of the fuel storage tank and regularly checked and maintained. An emergency response plan should be developed and communicated to outline the procedures in case of a fire or fuel-related incident.
Employee Training
Employees should be educated on the potential risks associated with fuel storage tanks, including fire hazards and fuel spillage. They should also be trained on the proper use of safety equipment and the importance of following safety protocols, including the use of personal protective equipment (PPE).
Compliance and Regulations
It is important to adhere to local regulations and guidelines regarding the installation and use of fuel storage tanks, including obtaining the necessary permits and certifications. Aviation industries must also comply with the strict rules and standards set by aviation authorities such as the Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA). These regulations often include specific requirements for fuel tank design, maintenance, and operation to prevent accidents and ensure the safety of aircraft and personnel.
Inerting Systems
Inerting systems are sometimes used in fuel tanks to reduce the risk of fire or explosion by replacing oxygen with inert gases such as nitrogen, creating a non-flammable atmosphere. This method is commonly used by the military and is being evaluated for commercial transport fuel tanks.
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Fuel tank placement
Selecting the Installation Site:
Begin by choosing a suitable location for the fuel storage tank. The site should be on firm and level ground, away from potential health and safety risks. This includes keeping the tank away from residential or office buildings and potential environmental hazards, such as flood-prone areas. It is crucial to refer to local regulations and carry out risk assessments to identify any specific hazards or restrictions in your area.
Surface and Accessibility:
Place the fuel tank on a paved or asphalt surface to prevent pollution and ensure stability. This surface should be away from direct exposure to sunlight. Ensure that the designated area has adequate ventilation and direct access to open air. If storing gasoline, maintain a distance of at least 50 feet from pilot lights, heat sources, sparks, and flames.
Safety Markings and Equipment:
Clearly mark the fuel tank and the surrounding area with safety signage that indicates its contents. Ensure that the necessary safety response equipment is readily available, such as powder, foam, clay covers, or absorbent granules, in case of spills or leaks. Assess how the tank will be used and by whom, and provide proper training to operators on handling fuel and safety protocols.
Tank Capacity and Filling:
Refer to the guidelines provided by the tank manufacturer and local authorities to determine the appropriate tank capacity for your needs. Western Global, for example, recommends filling their tanks to 95% capacity for safety. Additionally, consider the frequency of use and the amount of fuel required to prime pumps and feed lines. If storing gasoline, follow the Federal Government's guidelines for residential complexes, recommending semi-portable tanks ranging from 10 to 50 gallons.
Bunded Tanks and Spill Containment:
Consider using bunded fuel tanks, which provide an extra layer of security. A bund is an outer case that surrounds the container, made from masonry, concrete, or manufactured as part of the tank system. It is designed to hold 110% of the container's capacity, including any valves and taps, to prevent spillage. If you have multiple oil storage tanks, ensure the secondary containment can hold 110% of the largest tank's capacity or 25% of the total capacity, whichever is greater.
By following these guidelines and consulting local regulations, you can ensure the safe and proper placement of your fuel storage tank, minimising risks and maintaining compliance.
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Fuel tank materials
The size of a fuel storage tank varies depending on its purpose, location, and content. For example, some underground diesel fuel tanks can be up to 55 feet long and hold 30,000 gallons of fuel, while waste oil storage tanks can be as small as 3 feet long and hold just 55 gallons. Modern gasoline service stations usually have two or three tanks ranging from 10,000 to 20,000 gallons each.
When it comes to the materials used for fuel tanks, there are several options available, each with its own advantages and considerations:
Aluminum
Aluminum is a common material for marine diesel fuel tanks. It is lightweight and easy to cut, making it suitable for customisation. However, aluminum is prone to corrosion, and manufacturers often offer to coat their tanks with corrosion-inhibiting epoxies. Thicker aluminum tanks provide more resistance to corrosion and offer a sacrificial layer that can delay leaks due to corrosion. Aluminum tanks should not be used with bronze and brass plumbing fittings, as copper salts can contaminate the aluminum.
Steel
Steel fuel tanks are widely used, especially in commercial marine applications. Steel is known for its strength and low cost. It can be built to fit available spaces and is often made with thicker plates to account for sacrificial rusting. Steel tanks must meet specific ASTM standards for thickness and material grade to ensure their durability. Painted galvanneal (zinc-iron alloy-coated steel) and hot-dipped tin are effective coatings for resisting corrosion in steel tanks.
Fiberglass
Fiberglass is another option for fuel tank construction, offering durability and corrosion resistance. It is commonly used in underground storage tanks (USTs) for hazardous materials, often in combination with steel or polymer layers.
Plastic
Plastic fuel tanks are formed by blowing a thick continuous tube of HDPE (high-density polyethylene) into a mold, creating a seamless and spark-free design. Plastic tanks are considered safer in crashes as they can deform and rebound to their original shape. However, the recycling infrastructure for plastic tanks is less established compared to metal tanks, and the molding process generates industrial waste.
Stainless Steel
Stainless steel is another material used in marine diesel fuel tanks, providing durability and corrosion resistance. It is important to note that stainless steel insulating bushings should be used when connecting incompatible metals like bronze and brass to the fuel tank.
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Fuel tank accessories
Fuel storage tanks are a great way to increase productivity and equipment fuel efficiency. They come in a variety of sizes, ranging from 119 to more than 18,000 gallons, and can be customised with various accessories to meet specific needs.
When it comes to fuel tank accessories, there are several options available to enhance functionality and safety. Here are some accessories to consider:
Pumps and Reels: Fuel transfer pumps facilitate the efficient movement of fuel from the tank to the desired application. Reels, such as the Hannay Reels, ensure that hoses are neatly stored and easily accessible.
Gauges and Meters: Gauges, such as leak gauges and thickness gauges, provide important information about the fuel tank's condition and contents. Meters, like the Liquid Controls (LC Meter), offer precise measurements of fuel flow and volume.
Hoses and Nozzles: Hoses and nozzles are essential for transferring fuel from the tank to equipment. They come in various sizes and types, such as discharge hoses and inlet pipes, to suit different applications.
Safety Accessories: Safety is a priority when dealing with flammable liquids. Accessories such as pressure relief valves, safety pumping systems, and spill kits help to prevent and manage potential hazards.
Customisability and Compatibility: Some fuel tank manufacturers offer a range of customisation options to tailor the tank to specific applications. For example, the EnviroCube can be outfitted with multiple feed and return ports, and submersible pump options. Additionally, consider accessories that improve compatibility, such as forklift pockets for manoeuvring the tank when empty, or the ability to link multiple tanks together to create a fuel farm.
When choosing fuel tank accessories, it is important to consider the specific needs and requirements of your operation. Assess factors such as the volume of fuel usage, the level of mobility required, and any environmental or safety regulations that need to be adhered to.
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Frequently asked questions
The most common way to tell how much fuel is in a storage tank is by using a gauge. This is usually located on top of the tank and will give you a reading of how full your tank is.
A fuel tank gauge works by measuring the level of fuel in the tank. It will usually have markings for Full, 3/4, 1/2, 1/4, etc. The gauge is attached to a float inside the tank, which falls as fuel is consumed.
A reading on a fuel tank gauge should be treated as an estimate rather than an exact amount. The accuracy of a gauge can be checked by taking a reading immediately after filling up the tank.











































