External Floating Roof Tank

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.

External floating roof tank.

The roof rises and falls with the liquid level in the tank. 1 external floating roof an external floating roof shall consist of a pontoon type or double deck type cover that continuously rests on the surface of the organic liquid and is equipped with a closure device between the tank shell and roof edge. 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. The tank has a floating roof designed to move up and down with the level of naphtha inside to prevent the substance from vaporizing.

As there is almost no gas space between floating roof deck and oil level the evaporation loss of stored oil can be greatly reduced. Hmt s full range of services includes design construction maintenance inspection and repairs of aboveground storage tanks. The roof can be lowered to six feet above the floor of the tank. The floating roofs can be either external i e with open top tanks or internal i e inside fixed roof tanks.

It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid. The closure device shall consist of two seals with one seal placed above the other. External floating roof tank is known as external floating roof oil tank it is an open top floating roof tank without vault there is usually an external floating roof in it which can vertical float up and down. 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.