External Floating Roof Storage Tank

External floating roof and internal floating roof.

External floating roof storage tank.

Tanks with external floating roofs are used primarily to contain liquids with high vapor pressures when the vapor emissions from fixed. Floating roof tanks cost more to construct than fixed roof tanks for the same storage capacity. An 80 000 barrel floating roof storage tank exploded and burned while being filled with diesel oil. Because the flexible floating roof deck can float up and down to close to the liquid level gas space above the liquid level can be greatly reduced thereby greatly reducing the evaporation.

Specifically it is an environment friendly and economical storage tank or oil tank installed a floating roof under the vault of the tank usually made of aluminum stainless steel or other material to prevent the. The tank contained approximately 7 000 barrels of diesel oil at the time of the incident and had previously contained gasoline. These are categorized as external floating roofs which are designed to meet requirements of api standards 650 appendix c. The principal types of floating roof designs which are installed in tanks which store crude and middle distillate products are summarized below.

The floating roofs can be either external i e with open top tanks or internal i e inside fixed roof tanks. Internal floating roof tank is known as internal floating roof storage tank floating roof oil tank internal floating plate storage tank and internal floating plate oil tank etc. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid. Floating roof is the core component of floating roof storage tank which is divided into two types.

Types of floating roofs in storage tanks.