Rank: New forum user 
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Hi All, We currently have a diesel tank at our organisation and was wondering what type of safety signage should be applied on or near the tank? Thanks
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Rank: Super forum user 
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Personally I would ask the local fire brigades guidance as they typically prefer the orange transport placard style Its the one with 3Y above 1202 with the red flammable liquid 3 square on point. This tells them the hazard and the standard response without needing to read a Safety Data Sheet or similar
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Rank: Super forum user
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Personally I would ask the local fire brigades guidance as they typically prefer the orange transport placard style Its the one with 3Y above 1202 with the red flammable liquid 3 square on point. This tells them the hazard and the standard response without needing to read a Safety Data Sheet or similar
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4 users thanked Roundtuit for this useful post.
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Rank: Super forum user
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Diesel fuel is still classed a a flamamble liquid under DSEAR. A No Smoking / Flammable Liquids sign is still required to be displayed on the tank. Marking and content indication of tanks/pipelines etc is a specific requirment of DSEAR Its also good practice to also display the tank capacity.
Also emergency contact details to be used in the event of a leak especially if the tank is unattended and a leak might be spotted, by say a member of the public from a boundary fence to a property. Further guidance in HSG176 The storage of flamamble liquids in tanks - free of charge from the HSE website
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Rank: Super forum user
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1. Hazard Identification Signage Flammable Liquid Warning Sign - Symbol: Flame pictogram
- Wording: “Flammable liquid” or “Highly flammable”
- Standard: BS EN ISO 7010 (W021)
- Placement: On the tank and any access point (e.g. fill point, dispensing area)
Diesel is classified as a flammable liquid (Category 3) under CLP Regulations — even though it has a higher flash point than petrol, it still requires this hazard identification.
2. Prohibition Signs - No smoking or naked flames
- Pictogram: Cigarette with a cross through it (P002)
- Text: “No smoking or naked lights”
- Placed near tank, dispensing points, and refuelling areas.
- No mobile phones (if ignition risk in classified zone)
- Pictogram: Mobile phone with a cross through it (P013)
3. Mandatory Signs - Fire extinguisher location (M005 – Fire extinguisher pictogram)
- Emergency stop / shut-off (M014 – General mandatory sign with text “Emergency stop”)
- PPE Requirements (if applicable)
- For example: “Wear safety boots”, “Wear gloves” when handling hoses or spill materials.
4. Emergency Information Signs - Spill response and emergency contact information
- Display emergency contact number(s), spill procedure, and site name.
- First aid point (if nearby)
- Fire assembly point sign if within tank farm or yard area.
5. Environmental and Storage Information If your diesel tank is part of an above-ground installation, also include: - Pollution prevention signage:
- “Diesel – Do not overfill – Prevent spills – Report leaks immediately”
- Label fill and vent pipes clearly to avoid cross-contamination.
- Capacity label (e.g., “Diesel Storage Tank – 10,000 litres”).
- Control of Pollution (Oil Storage) (England) Regulations 2001 compliance label (if >200 litres outside).
With DSEAR you will also need an assessment.
It is considered best practice to include the Kemlar boards or Emergancy Action codes in UK with the UN Designation sign - UN2102.
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