EN590 is an EU standard that outlines the properties that all diesel fuels need to meet before they are sold in the EU. Since its inception EN590 has been adapted to lower the Sulphur content of diesel and now allows the blending of up to 7% of bio-diesel with conventional diesel. Whilst this has some environmental benefits, it could also have a long-term impact in the performance of your stored fuel.
Bio-diesel is hydroscopic, meaning it naturally absorbs water. As a result, you should regularly test your fuel to ensure it does not exceed the 200mg of water per kg (0.02%) standard outlined by EN590. The standard states that if your fuel does contain more that 0.02% of water per kg that you should ensure this is removed using an extraction process such as fuel polishing. In addition to the hydroscopic properties that bio-diesel possesses, it also reduced the Sulphur content of the diesel you use. Whilst this is an excellent environmental benefit, reduced Sulphur is ideal for diesel bug growth, therefore further contaminating the fuel. This can also be monitored and maintained through the implementation of an Intergrated Fuel Management Solution.