火灾工况下泄压容器破裂时间的估算

Estimation of Rupture Time of Pressure Relief Container under Fire Condition

通过计算火灾工况下容器泄压过程的内压和壁温的变化值,并以内压和壁温为基础分别计算容器承受的总应力和极限抗拉强度的变化值,当极限抗拉强度小于总应力时,泄压容器将发生破裂,这个时间点即为泄压容器的破裂时间。该估算泄压容器破裂时间的方法简单明了,为泄压设施提供设计依据。

In this paper, the internal pressure and wall temperature of the container during pressure relief process under fire condition are calculated,and the total stress and variation ultimate tensile strength of the container are calculated based on the internal pressure and wall temperature. When the ultimate tensile strength is less than the total stress,the pressure relief container will rupture. This time point is the rupture time of the pressure relief container. The method for estimating the rupture time of the pressure relief container is simple and clear,and it provides a design basis for the pressure relief measures.