Liquid hydrogen

From GAWDAwiki

Liquid hydrogen (LH₂) is hydrogen that exists as a liquid at atmospheric pressure, at -252.7°C (20.46 K); used for high-impulse rocket fuels.^[1]

Hydrogen is colorless as a liquid. Its vapors are colorless, odorless, tasteless, and highly flammable. Liquid hydrogen is non-corrosive. Special materials of construction are not required to prevent corrosion. However, because of its extremely cold temperature, equipment must be designed and manufactured of material, which is suitable for extremely low temperature operation. Vessels and piping should be designed to the American Society of Mechanical Engineers (ASME) Code and the American National Standards Institute (ANSI) Pressure Piping Code or Department of Transportation (DOT) Codes for the pressure and temperatures involved.^[2]

References

1. http://www.answers.com/topic/liquid-hydrogen
2. http://safety.seas.harvard.edu/services/hydrogen.html