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针对高压天然气管道的泄漏问题,分析了喷射火、火球和蒸气云爆炸3种危害模式及其死亡半径。按照大孔泄漏导致50%人员致死率的损伤标准,对三者的死亡半径进行了分析。结果表明:相同情况下,火球和喷射火的死亡半径比蒸气云爆炸的死亡半径大得多;火球和喷射火的死亡半径较为相近。高压天然气管道泄漏发生喷射火的概率较大,建议在进行天然气管道风险评价时重点考虑喷射火的危害。
In view of the leakage of high pressure natural gas pipeline, the three hazard modes of jet fire, fireball and steam cloud explosion and their death radius are analyzed. According to the standard of 50% mortality rate caused by big hole leakage, the death radius of the three was analyzed. The results show that under the same conditions, the radius of death of fireball and jet fire is much larger than that of steam cloud explosion. The fireballs and jet fire have similar death radius. High pressure natural gas pipeline leak jet fire probability is greater, the proposed natural gas pipeline risk assessment focused on the hazards of jet fire.