Floating Roof System
The floating roofs can be either external i e with open top tanks or internal i e inside fixed roof tanks.
Floating roof system. 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. As opposed to a fixed roof tank there is no vapor space in the floating roof tank except for very low liquid level situations. Today the emphasis is on controlling atmospheric pollution as well as on safety.
Sandborn roofs manufactures the patented sandborn full contact internal floating roof system ifr. Floating roof systems floating roofs were designed more than 100 years ago as a safety precaution to keep explosive gasses from building up between the roof of a tank and its petroleum contents. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid.