Why can’t an open-compartment design be used for the floating roof in oil tanks?
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According to Specification 4.2.9 for the design of tank areas in petrochemical storage and transportation systems, open-type compartmentalized internal floating roofs are not allowed. Why aren’t they permitted?
This starts with the structure of the open-compartment internal floating roof; due to the open compartments, if there is a leak at the welded areas of the bottom plate, the fluid will come into direct contact with air. This is very dangerous and poses significant safety risks to storage, transportation, and production.
It will cause oil to enter the floating tank, resulting in severe stress on certain areas of the tank and leading to its sinking
The difference between the open-compartment type floating tank and the single-compartment type currently in use lies in whether the floating tank has a cover or not. Independent floating tanks are safer; in the case of an leak, the oil and gas will be exposed to the outside. With a single-compartment tank, if there is a leak, the oil and gas remain inside the compartment, so it does not affect the safety of the storage tank.