Not all of the seamless steel pipe has the ability of antifreeze, antifreeze, that is, the so-called good low temperature resistance, low temperature resistant seamless steel tube for the execution of the standard: ASTM A333, minimum impact test temperature is according to different levels of seamless steel tube and the large difference. Grade 1 level of low temperature resistant seamless steel tube minimum impact test temperature was 45 ℃, Grade 8 levels of resistance to low temperature seamless steel tube minimum impact test temperature was 195 ℃.