External Floating Roof Tank

The roof can be lowered to six feet above the floor of the tank.

External floating roof tank.

The floating roofs can be either external i e with open top tanks or internal i e inside fixed roof tanks. As there is almost no gas space between floating roof deck and oil level the evaporation loss of stored oil can be greatly reduced. An external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid.

External floating roof tank to reduce evaporative losses. The roof rises and falls with the liquid level in the tank. The tank has a floating roof designed to move up and down with the level of naphtha inside to prevent the substance from vaporizing. Tanks with external floating roofs are used primarily to contain liquids with high vapor pressures when the vapor emissions from fixed roof tanks would exceed the standards set by the local jurisdiction.

Hmt s full range of services includes design construction maintenance inspection and repairs of aboveground storage tanks. The hmt s products are engineered to provide significant benefits to our customers in the form of increased working capacity reduced heel improved tank safety increased life span reduced emissions and reduced maintenance. 6 emission control system is a combination of capture system s and control equipment used to recover reduce remove or control the release of voc to the atmosphere. The external floating roof tank has a floating roof deck which is covered on the surface of oil and floats up and down with the oil level.

The closure device shall consist of two seals with one seal placed above the other.