External Floating Roof Tank Construction

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.

External floating roof tank construction.

20 liquid mounted primary seal is a primary seal that is mounted. The floating roof is made up of various elements such as fittings decks and rim sealing systems. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid. 18 internal floating roof tank is a storage tank equipped with a fixed roof and a floating roof which rests on the liquid being contained.

As there is almost no gas space between floating roof deck and oil level the evaporation loss of stored oil can be greatly reduced. 19 ladder and well is a ladder that passes through a well and is used to access the tank bottom of an internal floating roof tank. The roof rises and falls with the liquid level in the tank. 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 floating roof decks are usually made of welded steel plates and can be of three types double deck pontoon and pan. The floating roofs can be either external i e with open top tanks or internal i e inside fixed roof tanks. An external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate. Floating roof tanks are usually built in a gigantic size and this would involve various disciplines such as civil chemical mechanical fire safety construction inspection commissioning and operation.