Oil storage tanks

الوصف

Storage tanks are containers that hold liquids, compressed gas tanks; or pressure vessels. The term can be used for reservoirs. Storage tanks are available in many shapes: vertical and horizontal cylindrical; open top and closed top; flat bottom, cone bottom, slope bottom, and dish bottom. Large tanks tend to be vertical cylindrical or to have rounded corners transition from vertical side wall to bottom profile. Most container tanks for handling liquids during transportation are designed to handle varying degrees of pressure. Reservoirs can be covered, in which case they may be called covered or underground storage tanks or reservoirs. Some storage tanks need a floating roof in addition to or in lieu of the fixed roof and structure. This floating roof rises and falls with the liquid level inside the tank, thereby decreasing the vapor space above the liquid level. Floating roofs are considered a safety requirement as well as a pollution prevention measure for many industries including petroleum refining.