The Best Way to Prevent Freezing of DEF

by | Feb 16, 2018 | Diesel Fuel Supplier

As any Blue DEF distributor knows, it’s extremely important to take every possible precaution to prevent DEF from freezing. For those who need a quick refresher on the topic:

Yes, DEF Can Freeze

When temperatures begin to drop, DEF is susceptible to turning into slush and eventually freezing completely at 12 degrees F. However, even when it’s slushy, performance is not degraded.

Know the Temperature Tolerance Points

Safe storage temperatures for DEF range from 12 to 86 degrees F. Outside that range, it can either freeze (on the low end) or degrade quickly (on the high end).
It’s not just temperature extremes that can wreak havoc on DEF storage. Direct sunlight can degrade the urea content in the fluid while storing it in a non-approved type of container has its own set of difficulties.

Use a Proper Container

There are actually only two kinds of containers for proper DEF storage: HDPE plastics and stainless steel. Other storage unit types can cause rapid degradation of the DEF’s area. Also note that when non-approved containers are used, the DEF itself can cause damage to the containers, which means a double-loss.

Know About Expiration Dates

Like practically all consumer products and fuel additives, DEF has a shelf life, even when stored optimally. In the right kind of container and under ideal conditions, DEF tends to last about one full year before its urea begins to slightly degrade.

Where to Store DEF to Prevent Freezing

Of course, indoor storage is recommended to prevent freezing, but there’s more to it than that. Any indoor storage unit should be constructed of the proper material and needs to be temperature controlled. That means guarding against falls below 12 F and increases above 86 F.

Always handle DEF as if it were fuel and make sure to abide by the temperature sensitivity range. Those two precautions are the primary ways to prevent DEF from freezing.

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