Fuel Storage Tanks | Solent Power UK

How long does fuel last in a storage tank?

Here are the average periods that different fuel types last in a tank without deterioration:

• Diesel: 6-12 months (longer with stabilisers)
• Petrol : 3-6 months
• Heating oil: 18-24 months
• Paraffin: 5+ years if stored properly

Regular fuel testing and additives help to prolong fuel life.

Do fuel storage tanks need to be vented?

Yes, fuel tanks must be vented to ensure safe and efficient use.

Venting helps to prevent:

• A vacuum that might form as fuel is dispensed.
• Contamination from water due to condensation buildup.
• The risk of explosion caused by flammable vapours accumulating inside a sealed container.
• Pressure build-up

What are fuel storage tanks used for?

Fuel storage tanks are used to safely hold and manage various types of fuels such as petrol, diesel, and oil. They are a secure, convenient way to store fuel for filling cars, tractors, generators, machinery, and equipment in multiple industries.

Popular use cases include:

• Commercial settings for vehicle and generator fueling
• Industrial or construction sites for fuelling machinery and equipment.
• Homes or farms for storing heating oil
• A diesel depot containing bunded diesel dispensing tanks.

What are the different types of fuel storage tanks?

The two main types of fuel tanks are:

• Above-ground: Specifically designed bunded tanks that are often mobile, allowing them to be transported between and around work sites.
• Underground: Fitted in a specially prepared “bunker” below ground.

Storage tanks can also be categorized by their material makeup. Tanks are usually made from one or more of the following:

• Steel
• Fibreglass-reinforced plastic (FRP)
• Polyethylene (plastic)

How long do fuel storage tanks last?

Above-ground storage tanks have an average life expectancy of about 20 years. Underground tanks can last up to 30 years. Longevity for both tank types varies based on factors like their size, location, how they are used, their material make-up, and maintenance.

What materials are storage tanks made of?

Fuel tanks are made from:

• Steel: Durable but susceptible to internal and external corrosion, especially in poor-quality modules. Modern steel tanks often come with protective coatings for extra ruggedness.
• Fibreglass-reinforced plastic (FRP): Less vulnerable to corrosion, rust, and chemical damage but degrades over time. This is especially true if the container is exposed to the sun or extreme weather for long periods.
• Polyethylene (plastic): Usually used for smaller tanks and lower-impact applications. These modules can degrade over time, although modern high-density polyethylene (HDPE) provides greater durability and crack resistance.

How do you maintain a fuel storage tank?

To maintain a fuel tank, pay attention to the following:

• Check for leaks, corrosion and other damage.
• Inspect that vents and fittings are intact and secure.
• Drain water and sludge buildup.
• Monitor fuel quality.
• Ensure that the unit still complies with regulations.
• Do a proper clean and flush every three years. Diesel fuel tanks may require cleaning more often, because diesel is more prone to sludge buildup and microbial growth.

What are the regulations for fuel storage tanks?

Environmental regulations require fuel products to be labelled properly and stored securely in bunded fuel tanks to prevent spills and contamination. Bunded fuel tanks have a double-layered design to protect against leaks and spills. The bund is required to hold at least 110% of the inner tank’s capacity.

Mobile tanks must comply with the International Carriage of Dangerous Goods Regulations (ADR) governing the safe transport of hazardous products. This includes proper labelling and driver certification.

How do you prevent fuel contamination in storage tanks?

Here are practical tips to prevent fuel contamination in storage tanks:

• Check for and drain water from the tank regularly to avoid rust and fuel degradation.
• Periodic cleaning is recommended to remove sediment, microbial growth, and other potential contaminants that spoil fuel quality.
• Don’t store incompatible fuels such as petrol and diesel in the same tank. Label the container’s content to avoid accidental mixing.
• Proper venting is important to help prevent excessive condensation and water buildup.

What is the difference between above-ground and underground fuel storage tanks?

As the name implies, an underground tank is concealed from view, below ground, and takes up no surface space. It offers better protection and often lasts longer than surface tanks. However, fitting the tank requires excavation and specialised installation. Once installed it is fixed in that location. The upfront and maintenance costs are typically higher than above-ground units.

Above-ground fuel tanks are easier to maintain and install but are more susceptible to the weather. Some models are mobile which enables refueling in different locations. They are a higher fire risk, but good quality fuel tanks have fire-resistant features.

How do you clean a fuel storage tank safely?

To clean a fuel tank safely:

1. Drain all remaining fuel and dispose of it in accordance with regulations.
2. Remove accumulated sludge and sediment from the tank’s interior.
3. Flush the tank with manufacturer-approved cleaning agents to dissolve stubborn contaminants.
4. Once cleaned, dry thoroughly to remove all residues and prevent moisture-related problems.
5. For safety, wear protective gear and work in a well-ventilated area.

Professional services often use advanced methods such as high-pressure washing, chemical treatments, or vacuum pumping to clean comprehensively and efficiently.

What size fuel storage tank do I need?

The size of the fuel or diesel tank you need depends on several factors, including:

• The remoteness of your site—a more remote site usually needs more storage to prevent frequent trips to replenish fuel.
• The size of the job—a bigger job usually demands more storage.
• How many vehicles and other assets (machinery, equipment) are you fuelling?
• The size of the vehicles, generators, and machinery being fuelled.
• Whether you need mobile or static storage.
• Type of fuel being stored.