AdBlue (also called Diesel Exhaust Fluid / DEF) keeps modern diesel engines compliant by enabling SCR systems to cut NOx emissions. For busy depots and worksites, self-bunded AdBlue tanks combine product integrity with spill protection: the inner tank stores the fluid while the outer tank forms an integrated bund, helping contain leaks and keeping AdBlue pure. A-FLO’s range spans compact round tanks for fleet yards and containerised slimline units for higher throughputs—so you can size the install to your site.
What is AdBlue—and why quality matters
AdBlue is a high-purity 32.5% urea solution in de-ionised water (AUS 32) produced to the ISO 22241 specification. Keeping concentration and purity within spec protects SCR hardware and ensures emissions performance. Contamination (oils, minerals, metals) can damage dosing systems and catalysts, so clean, dedicated storage and dispensing are essential.
Why choose a self-bunded AdBlue tank?
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Built-in secondary containment – The outer wall captures leaks and overfill, reducing environmental risk and simplifying siting compared with separate bunds.
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Better product integrity – Closed cabinets, dedicated hoses/nozzles and compatible wetted materials minimise contamination and help maintain ISO 22241 quality.
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Faster deployment – Factory-integrated pumps, gauges and controls make installs quicker than piecing together components on site.
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Scalable capacity – Round yard tanks and container-style formats let you start small and scale as demand grows, with options that are relocatable for project work.
Storage & handling essentials (to protect your SCR systems)
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Temperature & shelf life – Store out of direct sun and ideally between 0–30 °C. AdBlue freezes around −11 °C (it can be re-used after thawing if uncontaminated) and degrades faster above ~30 °C. Typical shelf-life guidance is 12–18 months at moderate temperatures.
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Materials in contact with AdBlue – Use ISO-compatible materials such as HDPE/PP plastics and stainless steel 304/316. Avoid copper, brass, aluminium and mild steel in wetted parts to prevent corrosion and ionic contamination.
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Keep it clean and dedicated – Only use equipment dedicated to AdBlue. Don’t rinse tanks or lines with tap water, and keep fill points sealed and dust-free.
Features to look for in a self-bunded AdBlue system
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Closed, lockable cabinet with dedicated nozzle and hoses to keep contaminants out
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Correctly rated pumps (12/24/240 V), meters and optional hose reels for tidy, safe dispensing
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Tank level monitoring/ATG and high-level alarms to prevent overfill and stock-outs
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Compatible seals & pipework (e.g., EPDM, stainless) aligned to ISO 22241 guidance
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Filtration to protect dosing equipment
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Thermal management—insulation or heating for cold regions; shading/ventilation for hot yards
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Bund leak detection and spill kits for site safety
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Fluids management integration to control users, assets and reporting
Where self-bunded AdBlue tanks shine
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Fleet depots & distribution – Reliable, clean dispensing for trucks and buses
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Civil & mining projects – Containerised systems that move as the job moves
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Agriculture & councils – Neat, compliant yard installs with simple user workflows
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OEMs & workshops – Clean cabinet dispensing that protects SCR components
Choosing the right tank with A-FLO
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Capacity & footprint – Match daily draw-down and delivery intervals; pick compact round tanks or slimline containerised formats for tight spaces.
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Throughput & duty cycle – Size pumps, meters and hose management for peak usage and simultaneous vehicles.
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Controls & compliance – Add ATG, alarms and access control to support QA and reporting.
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Environment – Consider exposure to heat/cold, power availability (12/24/240 V), and relocation needs.
Quick FAQs
Does AdBlue freeze?
Yes—around −11 °C. Freezing does not damage the product; once thawed and uncontaminated, it can be used normally. Plan insulation/heating in colder climates.
How long can AdBlue be stored?
Shelf life depends on temperature—generally 12–18 months if kept sealed, shaded and clean at moderate Australian conditions.
Which materials are safe?
Use HDPE/PP and stainless steel (304/316) for wetted parts. Avoid copper, brass, aluminium and mild steel.
Why choose a self-bunded tank over single-wall?
You get integrated secondary containment, cleaner installs, simpler compliance and easier relocation—while protecting product quality.
About A-FLO Equipment
A-FLO supplies self-bunded AdBlue tanks and complete dispensing solutions—pumps, filtration, gauging and fluid management—for Australian fleets and worksites. Our team helps size, configure and commission systems that improve uptime, safety and control.