The choice of piping material in low temperature environment has great influence on the work efficiency and life of valve. Therefore, according to the environment, to a reasonable selection of valve materials.

In the low temperature environment, in order to effectively reduce or avoid the generation of fracture, piping materials shall have good strong ductile and brittle resistance, general steel under low temperature condition will appear low temperature brittleness, metal materials before the brittle fracture in low temperature environment without any symptoms, fracture happened suddenly, so often have very serious consequences.

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