What Types Of Storage Tanks are there?
Pressurized storage tanks and atmospheric storage tanks are the two main categories that apply to storage tanks. While atmospheric storage tanks are operated at a pressure at or near the atmosphere, pressurized storage tanks are typically employed for liquids that evaporate. Oil is stored in atmospheric storage tanks, which are further divided into a number of groups based on various fixed and floating roof designs. The flash point of the liquid being stored should be taken into consideration when choosing the style of roof for your storage tank.
Fixed Roofs
Fuel oil, water, or any other liquid with a very high flash point and no volatility is acceptable for fixed roofs. Fixed roofs either feature vents or breather valves that let the tank function with a little internal pressure. The following types of designs can be applied to fixed roofs.
Types of Fixed Roofs:
- Cone Roof
- Umbrella Roof
- Dome Roof
Floating Roof Tank
This kind of tank, as its name suggests, has a floating roof that changes height depending on the amount of oil inside. A safety measure to avoid vapor buildup inside the tank is the floating roof. The ceiling of many tanks is made to float over the liquid. The liquid level in the tank changes when filling, emptying, or changes in the outside temperature, and this causes the floating roof to rise and fall.
Open Top Tank
This was one of the early types of oil storage tanks. It has limited use now because of evaporation losses and the risk that oil will catch fire.
Single Skin & Double Skin Tanks
These are tanks made of steel or plastic on either one or two levels. A twin-walled tank is another name for a double-skin tank.
Bunded Tank
A tank that is bunded is one that is surrounded by another tank or a containment dike. The catch system for halting the spread of oil spills, leaks, and other oil contamination is the outer tank or containment dike.