What is the low-temperature pressure vessels

What is the low-temperature pressure vessels

Design temperature of -20 ℃ below the pressure vessel; liquefied ethylene, liquefied natural gas, liquid nitrogen and liquid hydrogen storage and transport of such containers are low-temperature pressure vessels. General pressure vessel ferritic steel used in the temperature decreases to a certain temperature, the toughness of the steel will decline sharply, and became very brittle, usually called the temperature of brittle transition temperature. Below the transition temperature in the pressure vessel under the conditions used, the container as there are any defects, residual stress, stress concentration factors due to high local stress, the container may not appear obvious in the case of plastic deformation and brittle fracture occurs lead to catastrophic accidents.


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Keywords: reactor，pressure vessel，heat exchanger