Meridian Manufacturing, Inc.
October 2014 | Revision 1.0
9-10
9.5.4 Storage
1.
Keep DEF containers tightly closed.
2.
To avoid solidification, do not store DEF at
temperatures below 23°F (-5°C). Solidified
DEF, which has been warmed up carefully at
temperatures not exceeding 86°F (30°C), will
not be impaired in quality and can be used as
soon as the warmed up solution is free from
solids. Frozen DEF can be thawed and used
without concerns of product degradation;
however, damage to the container or
equipment will likely occur.
3. Store only in approved containers.
4. Protect containers against physical damage.
5. In order to prevent decomposition of the urea,
as well as the evaporation of water in the case
of vented containers, prolonged transportation
or storing above 77°F should be avoided. (See
table below).
Constant Ambient
Storage Temperature
(°F)
Minimum Shelf Life
(Months)
≤50
°F
36
≤77
°F
*
18
≤86
°F
12
≤95
°F
6
>95
°F
**
* To prevent decomposition of the DEF solution, prolonged
transportation or storage above 77°F should be avoided.
** Significant loss of shelf life. Check every batch before use.
Source: ISO 22241-3:2008(E)
9.5.5 Using DEF
1.
Only fill the DEF tank with ISO certified DEF
that has been delivered in dedicated, sealed
DEF packages.
2. Wear appropriate protective clothing and
equipment, such as safety glasses, gloves,
etc. while pumping DEF.
3. Wash thoroughly after handling DEF.
4.
Never add DEF into the diesel fuel tank.
5.
Never add diesel fuel into the DEF tank.
6.
Avoid contact with DEF on eyes, skin, and
clothing.
7. If spilled, rinse the area with water.
8. Do not use DEF that has been diluted with
water or other substances.
9.5.6 DEF Disposal
For proper disposal of waste DEF, as a non-
hazardous liquid waste, it should be solidified with
stabilizing agents such as sand, fly ash, or clay
absorbent, so that no free liquid remains before
disposal in an industrial waste landfill.
Chapter 9 | Operation
