Diaphragms for Gas Holders are used in steel plants for the temporary storage of converter and blast furnace gas. These Diaphragms come with a thickness of 2.2 mm and are extremely low-permeating and resistant to temperatures ranging from -40 degree C to +80 degree C. These Diaphragms are designed with multi-axial polyamide layer as reinforcing material which delivers optimum flexibility and high strength. These Diaphragms for Gas Holders have a reciprocating piston that moves up and down adjusting the stored volume to the fill volume and keeping the gas at working pressure.