Storing flammable liquids safely is critical for preventing fires and accidents. Whether in a workplace, warehouse, or industrial site, proper storage reduces risks and ensures compliance with safety regulations. Liquids can ignite easily, causing serious harm.

In this guide, we’ll cover how to store flammable liquids safely, key regulations, and the best practices to protect people and property.

How To Correctly Store Flammable Liquids?

When not in use, flammable liquids must be stored in fire-resistant containers and separated from oxidizers, corrosives, and other dangerous substances. Storage must be designed to delay fire involvement, allow time for a safe evacuation, and meet a minimum of 30-minute fire resistance standards.

Process Areas, Workrooms, Laboratories & Similar Guidelines

1. Containers must be closed and stored in fire-resistant cabinets or bins.

2. Cabinets must contain spills (holding 110% of the largest stored vessel).

3. Storage areas should be away from processing areas and not block escape routes.

4. Flammable liquids must be kept separate from oxidizers, corrosives, and other dangerous substances.

5. Cabinets must delay fire involvement long enough for safe evacuation.

6. Fire-resistant storage must meet minimum 30-minute integrity standards.

7. Joints must be gap-free, and fastenings must withstand 750°C+ temperatures.

8. Additional international standards (BS EN 14470-1, NFPA 30) are not legally required but may enhance safety.

Follow UK regulations like Dangerous Substances and Explosive Atmospheres Regulations (DSEAR) to ensure compliance. Label all containers clearly, keep spill kits nearby and regularly check for leaks and damaged containers to reduce risks.

Flammable Liquid Storage Limits

Highly flammable liquids evaporate at room temperature. Their vapours can ignite if mixed in the right concentration and exposed to a spark or flame. To ensure safe storage, we must limit the amount stored and maintain proper ventilation. This helps prevent vapour buildup from reaching dangerous levels.

1. Max 50 litres for extremely/highly flammable liquids (flashpoint below workroom temperature).

2. Max 250 litres for other flammable liquids (flashpoint up to 60°C).

3. Limits are flexible but must be justified with a risk assessment.

Flammable Liquid Considerations

1. Properties of stored liquid combustibles (worst case scenario applied).

2. Size of workroom and number of workers.

3. Amount of flammable liquid handled and spill risks.

4. Ignition sources and potential fire spread.

5. Ventilation for workroom and storage cabinets.

6. Fire resistance and self-closing doors/lids.

7. Escape routes and emergency procedures.

8. Dedicated storage rooms or outdoor areas should be used for excess or unused containers.

9. Compliance with minimum legal requirements is the employer's responsibility.

What Is DSEAR?

DSEAR stands for Dangerous Substances and Explosive Atmospheres Regulations. It is a UK law that protects workers from fire, explosions, and harmful substances.

1. Employers must minimise the amount of flammable liquids stored.

2. Risk assessments under DSEAR Regulation 5 must justify storage quantities.

3. Only minimum amounts needed for half a day or one shift should be kept in work areas.

Businesses must identify risks, assess hazards, and put controls in place. This includes safe storage, handling, and proper ventilation.

DSEAR applies to flammable liquids, gases, dust, and explosive atmospheres. Failure to comply can lead to legal action and serious safety risks.

What Is COSHH?

COSHH stands for Control of Substances Hazardous to Health. It is a UK regulation designed to protect workers from harmful chemicals and substances.

Employers must identify hazardous substances, assess risks, and take steps to prevent or reduce exposure. This includes using proper storage, ventilation, PPE, and training.

COSHH covers chemicals, fumes, dust, vapours, and biological agents. Non-compliance can lead to fines or legal action. Following COSHH keeps workplaces safe and legally compliant.

What Is BS EN 14470-1:2004?

BS EN 14470-1:2004 is a European standard for fire safety storage cabinets. It specifies safety requirements for flammable liquid storage.

The standard ensures cabinets can withstand fire for a minimum of 15 minutes and prevent flames from spreading. It outlines requirements for materials, design, and construction.

Cabinets must also have secure doors, no gaps, and fire-resistant fastenings. Compliance with this standard improves safety but is not a legal requirement in the UK.

How To Store Petrol Correctly In The UK

Storing Petrol, Under 30 Litres

Storage Limits at Home or Non-Workplace Premises:

• You can store up to 30 litres of petrol without notifying your local Petroleum Enforcement Authority (PEA). ​

Suitable containers include:​

• Portable metal or plastic containers.​

• One demountable fuel tank.​

• A combination of the above, not exceeding 30 litres in total.​

Safety Guidelines:

• Do not store petrol inside your home or living spaces.

• Keep petrol out of reach of children.​

• Store petrol away from direct sunlight and sources of heat or ignition.​

Storing Petrol, Over 30 Litres

If you need to store over 30 litres and up to 275 litres of petrol at home or on your premises, you must follow legal requirements.

You must notify your local Petroleum Enforcement Authority (PEA) in writing. Include your name, address, and storage location. This rule has been in place for years and still applies today.

You can store petrol in:

• Approved metal or plastic containers

• Demountable fuel tanks

• A mix of both, as long as the total does not exceed 275 litres.