Fixed Roof Tank Vs Floating Roof Tank

If product purity is a concern you have to use floating cum cone roof.

Fixed roof tank vs floating roof tank.

An external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate. The roof rises and falls with the liquid level in the tank. A typical fixed roof tank consists of a cylindrical steel shell with a cone or dome shaped roof that is permanently affixed to the tank shell. Of currently used tank designs the fixed roof tank is the least expensive to construct and is generally considered the minimum acceptable equipment for storing liquids.

Perfect designed internal floating roof storage tank is the best method to control the evaporation loss of the fixed roof tank. Floating roof also reduces the static electricity hazard. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid. From a product contamination standpoint is nitrogen blanketing a fixed roof tank preferable to using a floating roof tank.

An internal floating roof tank is a floating roof tank fixed an extra fixed roof on the floating roof to prevent floating roof from wind and rain and guarantee the quality of the stored oil. Floating roof tank can be divided into two types internal floating roof and external floating roof. Instead the cfrt is equipped with a pressure vacuum pv vent and may even include a gas blanketing system such as that used with fixed roof tanks these tanks are designed as in appendix c of the api standard 650. Closed floating roof tank this has an internal floating roof but eliminates natural ventilation of the tank vapor space.

I am working on a jet fuel tank farm and am looking into any cost savings that would be associated with decreasing the load on the nitrogen generator at the expense of the increased first cost of a floating roof tank. As per the oil indystry practice in india floating roof tank is used for storing hsd. This vapor was ignited at a boiler house some distance away.