Experts Share Tips to Prevent Plastic Oil Tank Damage

During winter months, discovering a leaking oil tank can be both financially and environmentally devastating. Unlike steel tanks, damaged plastic oil tanks cannot be repaired and must be replaced entirely—a significant expense. Proactive maintenance and regular inspections are crucial to preventing such costly scenarios. But what makes plastic oil tanks advantageous, and how can their lifespan be extended?

Compared to steel tanks, plastic oil tanks—typically molded from polyethylene—are resistant to corrosion, lightweight, and easier to install or relocate. The material's insulating properties slow heat transfer, reducing fuel contamination risks. Additionally, their seamless design allows them to withstand deformation without cracking, minimizing failure risks.

Regulations require plastic oil tanks storing over 3,500 liters of fuel to have secondary containment, such as a bund or outer tank. This additional layer prevents leaks, pollution, and theft. Compliance with fuel storage regulations varies by region, so verifying local requirements is essential.

Plastic oil tanks typically last 10–15 years, though improper maintenance can shorten this significantly. While cheaper than steel tanks, they are less resilient to extreme weather. The choice between materials often depends on priorities: plastic offers rust resistance, while steel provides durability.

Prolonged outdoor exposure subjects plastic tanks to weather-related stress, leading to cracks. Key causes include:

• Freezing Temperatures: Cold weather makes plastic brittle. Snow accumulation on tanks adds weight, increasing fracture risks. Regular winter inspections and avoiding complete fuel depletion are recommended.
• Sunlight Exposure: UV rays cause fading, discoloration, and expansion in single-layer plastic tanks, leading to warping and cracks. Positioning tanks in shaded areas or using protective barriers can mitigate damage.
• Uneven Bases: Improper installation on unlevel surfaces creates uneven pressure when full, stretching the plastic. Professional installation on flat, concrete bases is critical.
• Water Ingress: Rainwater entering through loose lids promotes bacterial growth and sludge buildup, clogging filters and pipes. Unlike steel tanks, plastic damage is externally visible, allowing timely intervention.

Damaged plastic tanks cannot be repaired and must be replaced. Routine inspections help detect issues early. While plastic tanks require minimal upkeep, painting may be desired for UV protection or aesthetic purposes. Acrylic or elastomeric paints are ideal, as they flex with tank expansion.