1.5662 (X8Ni9) 9% nickel alloy double walled vertical Cryogenic nitrogen storage tank fabrik #575-0009 nickel alloy steel (specially designed for cryogenic operations) the space between the inner/outer tank is 26370 liter outertank is carbon steel 2.9m diameter x 13.7m high, pressure rated for full vacuum, 12mm wall thickness, bottom dish has a thermosyphon manufactured by Messer Grisheim Gmbh, fabrik #V14167, pressure rated 20 bar @ -196 degrees C, 9-tubes with blades,