idle_09 said:
The purpose of emptying the 6ft hemisphere tank of oil is to remove the oil from the tank in order to clean or repair the tank, or to repurpose the tank for a different use.
The oil in the tank weighs 50 pounds per cubic foot. This means that the total weight of the oil in the tank will depend on the volume of the tank.
The capacity of the 6ft hemisphere tank can be calculated using the formula for the volume of a hemisphere: V = (2/3)πr^3, where r is the radius of the tank. The capacity will vary depending on the thickness of the tank walls, but on average, a 6ft hemisphere tank can hold approximately 56 cubic feet of oil.
In order to empty the tank of oil, you will need a pump, hoses, and a container to collect the oil. You may also need safety equipment, such as gloves and goggles, to protect yourself while handling the oil.
The time it takes to empty the tank of oil will depend on the capacity of the tank and the flow rate of the pump being used. On average, it can take anywhere from 30 minutes to several hours to empty a 6ft hemisphere tank of oil.