DEF Vertical Tanks

Diesel exhaust fluid (DEF), a solution of 32.5% urea in de-ionized water, is used in Selective Catalytic Reduction (SCR) systems on diesel engines. To meet EPA 2010 emission standards, most diesel engine manufacturers are using SCR technology. The SCE system uses diesel exhaust fluid to convert NOx emissions into nitrogen and water vapor.

The materials used in Norwesco tanks and accessories (polyethylene, polypropylene, and EPDM) are compatible with DEF. Norwesco Premium vertical tanks are in compliance with ISO 22241-3, section 4.1, and meet the design requirements of ASTM D1998 when used for the storage of DEF (specific gravity approximately 1.1). The preferred storage temperatures for DEF are from 20° F to 85° F, and these temperatures are within the recommended range for Norwesco tanks.
Norwesco DEF Statement 9/16/2010