سقف شناور آلومینیومی مخازن ذخیره

سقف شناور آلمینیومی مخازن ذخیره - Aluminum Floating Roof Aluminum Floating Roof Introduction Internal floating roofs (IFR) first found their place in the oil industry to conserve product and prevent fires. Later, they were required for controlling hydrocarbon emissions into the atmosphere, as regulated by the U.S. EPA. An IFR tank has a floating deck below a fixed roof. The floating deck rises and falls along with the liquid level, leaving no room for a vapor zone. Depending on the product and the plant environment, floating roofs are readily available in steel or aluminum. Fiber reinforced plastic can also be an option in highly corrosive environments For most applications, an IFR is the most cost-effective solution to regulating vapor emissions. However, they have their own limitations and disadvantages. One disadvantage is they reduce the tank working capacity by limiting the maximum product depth (freeboard) and may also require a minimum product depth (heel). IFRs are not suitable with unstable products and the EPA regulations specify a floating roof cannot be used to control vapor emissions if the product vapor pressure is in excess of 11 pounds per square inch absolute (759 millibars). Additionally, the bubbling of unstable liquids can produce enough vapor pressure beneath the floating roof to damage the roof itself or the perimeter seal, causing failure of the floating roof