is DEF fluid flammable?

It's those folks English not their first language. They don't understand everything they hear in the academy and they can't read what's written on the fuel/def pump.

 

Considering what a pain those hoses can be sometimes I would think that behavior would be more intentional or sheer stupidity or ignorance. Not to mention you fuel before the def.
I talked to a guy that was stuck for 2 weeks waiting for a truck to be repaired that he was recovering after a driver left it and quit. Seems the driver put def in the fuel tanks.

 

DEF is non flammable, non hazardous, and non corrosive. If it was any of these you would need a Hazmat endorsement it haul it in bulk, but you don't. Yes it does crystallize, but it is easily washed away with plain water without leaving a stain. I know this, because I used to haul in bulk.

 

Deleted, Found answer with Google

 

It does cause corrosion to ferrous steels and aluminum. Hence why most all DEF components in the trucks are plastic.

 

It's not worth the argument. Plastic is use to reduce the crystallizing in the system. Our equipment use to transfer and pump the DEF was made of plastic, stainless, and aluminum. If it were corrosive it would eat or stain the polished metal that covers some DEF tanks.

 

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I do know...if you ever get in a tight and your DEF tank is low enough that the truck is about to derate, a couple gallons of water will certainly get you to the next DEF pump.

 

Really bad advice. Iff you put in anything other than distilled or demineralized water you have a high probability of destroying the SCR catalyst, which at least on a detroit DD series will cost roughly $10 to replace the One Box not including labor. Also adding water would dilute the DEF and result in a DEF quality error and a derate anyway. Most trucks go thousands of miles on a tank, why would anyone run out?

 

It would be better to get 1 of those 2.5 gallon DEF jugs to keep for a back up. You may even find 1 in the trash somewhere, but be sure to rinse it out first.