What is AS 1940?
AS 1940:2017 is the Australian Standard for the storage and handling of flammable and combustible liquids. The current version includes Amendment 1 (2019) and Amendment 2 (2021). If you store diesel above ground on a farm, mine, construction site, depot or backup-power installation, it is the standard your tank setup is usually assessed against.
Is diesel covered?
Yes. Under AS 1940, diesel is a Class C1 combustible liquid, because its flash point is above 60°C and no higher than 93°C. The 2017 edition lined this class up with the GHS system used in the WHS Regulations, where diesel is a Category 4 flammable liquid. Combustible liquids are treated differently from flammable liquids such as petrol, and the requirements depend on the class and the quantity you store.
What the standard looks at, in plain English
- Spill containment (bunding): how a leak or overfill is contained so fuel does not reach soil, drains or waterways. Since the 2017 edition, a bund generally needs to hold at least 110% of the largest tank.
- Location and separation: where the tank sits relative to buildings, site boundaries and ignition sources. Distances depend on the class and quantity stored, so check the standard or ask your consultant for your site.
- Tank construction: tanks built to a recognised design standard for the liquid stored, such as AS 1692 for steel tanks.
- Venting, fittings and overfill protection: safe filling, dispensing and venting.
- Signage, fire protection and access: placarding and site safety requirements that scale with quantity stored.
Local councils, state dangerous goods regulators and your insurer may also have requirements. Always check with them for your site.
Self-bunded tanks: a simpler way to contain spills
A self-bunded (double wall) tank has a built-in secondary containment wall, so you do not need to build a separate concrete bund around it. Our self-bunded fuel and diesel tanks are manufactured to exceed AS 1692, in accordance with AS 1940.
Thinking about going underground?
For larger volumes or where space and site safety matter, an underground tank may suit better. See our underground fuel tanks, including FRP and Glasteel options.
Talk to us about your site
Tell us how much diesel you store and where, and our team can help you choose a tank for your setup. This page is general information only and is not compliance advice.