Fixed Roof Tank Vs Floating Roof Tank

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.

Fixed roof tank vs 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. 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. When the tank was refilled with warm crude oil at 37 c 100 f vapor was pushed out into the space above the floating roof and then out into the atmosphere through vents on the fixed roof tank figure 5 16. The primary consideration in selecting the type of roof is to prevent the vapour loss where by emission to atmosphere is eliminated.

Floating roof also reduces the static electricity hazard. Internal floating roof tank can be used to store gasoline jet fuel and other volatile oil and liquid chemicals like aldehydes alcohols methanol ethanol ketones acetone benzene benzene toluene xylene styrene. 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.

It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid. Closed floating roof tank this has an internal floating roof but eliminates natural ventilation of the tank vapor space. The roof rises and falls with the liquid level in the tank. Perfect designed internal floating roof storage tank is the best method to control the evaporation loss of the fixed roof tank.

As per the oil indystry practice in india floating roof tank is used for storing hsd. An external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate. This vapor was ignited at a boiler house some distance away.