The hazards associated with liquid oxygen are exposure to cold temperatures that can cause severe burns ; over pressurization due to expansion of small amounts of liquid into large volumes of gas in inadequately vented equipment ; oxygen enrichment of the surrounding atmosphere ; and the possibility of a combustion reaction if the oxygen is permitted to contact a non - compatible material 同液氧相联系的危险有:会导致严重冻伤的低温暴露;在通风不充分的设备里,小量液体汽化成大量气体造成的过压;周围空气的氧富集;如果氧接触到不相容的材料而发生燃烧反应的可能性。