In the maritime industry, AUS40 is often discussed in terms of volume—thousands of liters pumped per hour. But for the Technical Superintendent or Chief Engineer, the most important metric isn’t quantity; it’s purity.
AUS40 is not simply “bulk liquid.” It is a precision-engineered chemical reagent. When injected into a Selective Catalytic Reduction (SCR) system, even microscopic contaminants can lead to catalyst poisoning, sensor failure, and eventually, non-compliance.
At aus40marine.com, we approach AUS40 handling with the rigor of a laboratory, not just a logistics company. Here is how we ensure that every drop delivered meets the exacting requirements of your vessel’s engines.
Quality Begins at the Source: ISO 22241
Our quality control starts long before the fluid reaches the port. We partner exclusively with certified manufacturers who produce AUS40 to ISO 22241 standards—the internationally recognized specification for diesel exhaust fluid quality.
Every batch we receive undergoes verification testing to confirm two critical specs:
- 40% Urea Concentration: Precise formulation is required for the chemical reaction in marine applications.
- Purity Limits: We strictly monitor for alkalinity and metallic contamination.
The Hidden Dangers: Temperature and Materials
AUS40 is a sensitive fluid. It is vulnerable to temperature extremes and highly aggressive toward certain metals. Mishandling it during storage is the most common cause of quality degradation.
To prevent this, our facilities utilize climate-controlled storage. We monitor temperatures continuously to prevent crystallization (in cold) or chemical degradation (in heat), ensuring the fluid remains within its optimal range.
Furthermore, our storage tanks are constructed from specialized materials—stainless steel and specific polymers—that will not degrade. This ensures that no metallic ions leach into the product, which is a primary cause of SCR catalyst damage.
Zero Tolerance for Cross-Contamination
The biggest threat to AUS40 purity is cross-contamination. Using a hose that previously transported diesel, water, or standard chemicals can ruin an entire batch of urea.
At aus40marine, we eliminate this risk through a strict protocol: Dedicated Equipment.
- Exclusive Use: Every transfer point, pump, hose, and fitting in our supply chain is utilized exclusively for AUS40.
- Material Grade: We utilize food-grade or marine-grade stainless steel components to ensure nothing compromises the fluid’s integrity.
The Proof is in the Paperwork
We don’t expect you to take our word for it. We provide scientific proof with every delivery.
Before any delivery leaves our facility, samples undergo rigorous laboratory analysis. We test for urea concentration, specific gravity, alkalinity, and the absence of contaminants.
This data is compiled into a full Certificate of Analysis (COA) issued to your vessel. This document integrates seamlessly with your ship’s compliance records, giving you absolute confidence that the product you are bunkering will perform reliably.
Conclusion: Protecting Your Assets
Your vessel’s SCR system is a significant investment. Protecting it requires a supply partner who understands the chemistry of what they are delivering.
From temperature monitoring to proper agitation techniques that prevent settling, our team follows protocols designed to maintain fluid quality from storage through delivery. When you partner with us, you are getting a product that is safe, pure, and effective.
Don’t risk your SCR system with unverified fluid. Get certified, high-purity AUS40 with a full Certificate of Analysis. Contact Our Quality Team Today
