Vapor tight floating roof support leg for liquid storage tank

Abstract

The disclosure herein describes a vapor tight floating roof support leg for a liquid storage tank characterized by a leg and a seal at the top of the leg so as to prevent the escape of fugitive volatile organic or other gaseous compounds from evaporation from the surface of the liquid. In one embodiment, the leg is of one fixed length and the seal is comprised of a blind welded, bolted or otherwise firmly affixed to the top of the leg. In another embodiment wherein the support leg is comprised of two pieces, an inner pipe leg slides into a hollow sleeve. The seal at the top of the support leg is comprised of a flange firmly attached to the sleeve, and a blind is welded, bolted or otherwise firmly affixed to an inner leg which may be any predetermined length. The blind is firmly attached to the flange.

Dependencies are inferred from the claim text.