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medicinal grade urea manufacturing plant, or the de-ionized water can be added to the
urea at a distribution plant to save the cost of shipping water along with the urea.
Since the composition of the DEF is strictly controlled by the ISO standard, the solution
should be guaranteed to be of the same quality across the board. Obviously, it would
be possible to use agricultural grade urea, but this would fall outside the ISO and API
requirements, but it is conceivable that such a compound could find its way to spot
markets. More likely, though, problems with DEF could be caused in the addition of the
de-ionized water at the distribution point or be contaminated in the distribution system by
incorrect procedures and handling.
In the case of BlueDEF, manufactured by PEAK Commercial & Industrial, a whole protocol
has been developed to eliminate the potential for contamination through the transportation
and distribution process. There is no possibility of cross-contamination with other products
as the railcars and road tankers that carry the fluid are dedicated to the shipping of urea
or DEF alone. BlueDEF uses some common carriers but they must follow BlueDEF’s strict
equipment purity specifications. This specification does not allow common carriers to
washout the tanks after other product has been carried; the tanker trailers or railcars have
to be dedicated to the DEF product alone. Similarly, dedicated equipment is used at any
transfer point and there are tamper-resistant seals for containers.
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