关键词: 液氯 , 泄漏 ,  液击 ,  早期失效

Abstract: A bursting accident of soft tube close to the entrance of the storage tank happens when the tank was filled and almost finished, which resulted in the leakage of liquefied chlorine and human chlorine gas poisoning. The maximal liquid hammer pressure caused by cutting off valve was calculated based on the theory of liquid hammer, and the strength of the tube was checked. The results show that the maximal liquid hammer pressure reaches to 2.6 MPa, which is almost 6.5 times as high as the normal working pressure. The fatigue phenomenon of soft tube would happen as repeated liquid hammer. It would induce the premature failure of the tube which may be the technical reasons for this accident. It is deduced that the maximal liquid hammer pressure of the pipes should be taken in consideration at designing stage, and relevant measures should be taken to reduce the destructive power in operating.

Key words: Liquefied chlorine , Leakage ,  Liquid hammer ,  Premature failure