Liquid hydrogen tank car

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A liquid hydrogen tank car, also called liquid hydrogen tank wagon or liquid hydrogen tanker wagon is a railroad tank car designed to carry cryogenic liquid hydrogen (LH2). LH2 tank cars with a capacity of 17,000 pounds (7,711 kg) are used for transcontinental transport.[1][2]


The pressure within the tank is 25 psi (170 kPa) or lower[3][4] with a temperature below 20.27 K (−423.17 °F or −252.87 °C) and a boil-off rate of 0.3% to 0.6% per day[5] The tank is double walled like a vacuum flask with multi-layer insulation, with the valves and fittings enclosed in a cabinet at the lower side or end of the car.


Cryogenic liquid tank cars in the USA are classified as follows:[6]

See also[edit]


  1. ^ "Toward a liquid hydrogen fuel economy-Pag.9" (PDF). Retrieved 2015-04-06. 
  2. ^ "". Retrieved 2015-04-06.  External link in |title= (help)
  3. ^ Cryogenic rail tank cars Pag.3[permanent dead link]
  4. ^ Spencer, A.B.; Colonna, G.R. (2003). NFPA Pocket Guide to Hazardous Materials. National Fire Protection Association. p. 59. ISBN 9780877655589. Retrieved 2015-04-06. 
  5. ^ "Costs of storing and transporting hydrogen Pag.50" (PDF). Retrieved 2015-04-06. 
  6. ^ "Field guide to rail cars". Archived from the original on 2008-12-20. Retrieved 2015-04-06. 
  7. ^ "eCFR — Code of Federal Regulations | DOT113". Retrieved 2015-04-06. 
  8. ^ "Railroad tank car specification marking system" (PDF). Retrieved 2015-04-06. 

External links[edit]