Below is a list of SS Tanks manufacturers from Rock Falls, Illinois. SS tanks are corrosion resistant containers that hold and store a variety of substances. Usually cylindrical in shape to resist hydraulic pressure, they stand vertically or horizontally, resting on a concrete slab or held in a stand, and the capacity varies from one to millions of gallons. SS, or stainless steel, is sanitary and simple to clean; it is also very strong, durable and doesn’t rust quickly or react to many substances.