91.5662 X8Ni9) 9% nickel alloy double walled vertical Cryogenic nitrogen storage tank inner tank is 59043 liter 1.5662 (X8Ni9) 9% 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, tank has a stainless steel 18.5 liter air heater mounted under the bottom dish, manufactured by Messer Grisheim Gmbh, fabrik #V14166, pressure rated 20 bar @ -196 degrees C, 9-tubes with blades,