Gas Holder is basically a floating cover with an extended rim submerged into the water level sufficiently so that in the maximum lift position of the floating cover the rim still remains below the top water level. The Gas Holder covers can be provided with vertical guided system or spiral guided system. In both the cases, the rollers are attached with the Gas Holder covers around its peripheryl at uniform spacing to ensure that the cover is properly balanced during lift position and is not tilted unduly under wind load conditions. The adequately sized structure is provided to ensure roller guidance above the gas holder tank area. The Gas Holder tanks can be provided upto 110' diameter & above.

Gas Holders are also available with engineered flexible membrane which is sealed tight to the tank wall.