Internal Floating Roof a floating top cover installed inside the dome shaped storage tank, which floats on the medium and can rise and fall freely with the medium. According to the “Guidelines for Energy saving Design of Petroleum Warehouses” and other relevant specifications, fixed top storage tanks for chemical media must be equipped with inner floating roofs. The use of inner floating plates can cover the liquid level inside the tank, avoiding its exposure to the air, effectively reducing oil evaporation loss, environmental pollution, reducing fire risks, and improving the safety of oil tank use. The use of an internal floating roof is widely recognized as the simplest and most economical method to reduce oil evaporation losses in fixed roof oil tanks worldwide.