Underground storage tanks

Comparison between SF Tank and FF Tank

SF double wall tank is made of steel and excels at physical strength.
There are no concerns of external corrosion and it is completely safe→Especially, in Japan where earthquakes occur frequently, you can rely on it because of its proven record.

	SF tank	FF tank
Earthquake resistant strength	Steel products are strong (proven from past records)	Weaker than the steel products	○
Strength of nozzles for piping connection purpose	Strong due to its unitary structure with the steel tank.	Attached by secondary adhesion Special care needed for handling	△
Cathodic protection measures	not necessary	not necessary	◎
Waste Disposal	Main body is recyclable	Cut the whole into 10cm2 pieces and dispose as industrial waste.	△
Applicability to biofuel (alcohol)	Usable by all types of fuel	Consideration is needed for the use of biofuel	○

(Note) The U.S. made FF double wall tank can handle alcohol-blend fuels due to ingenious plastic grade and tank structure. (UL-approved)