对于原油容器安全阀在火灾工况下最大泄放量的确定，由于缺少必要的研究工具，历来都是工程计算中的难题。
Determination of maximum relief capacity of PSV of a crude oil vessel under fire case is always a difficult engineering problem because of lack of necessary research tools.
随着动态hysys模拟软件的引进，给在动态环境下模拟安全阀在火灾工况下的最大泄放量创造了良好的条件。
With the introduction of the dynamic simulation software HYSYS, the condition for solving the problem is well created.
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