GB 150．1附录B关于火灾时盛装液化气体容器的安全泄放量计算公式推导解析

摘要

The calculation of safety relieve capacity is a common problem for the engineering technicians when the liquefied gas vessel occur fire.From many papers of domestic and overseas,we can know that the basic calculation method is below:Firstly,the heat absorption capacity of the vessel is calculated;then the safety relieve capacity is acquired from this heat absorption capacity divided by the latent vaporization heat of the liquefied gas under the discharging conditions.Relevant formula in API Std 521—2007 was generally applied when the safety relieve capacity is involved.The detailed derivation process of the for-mula is presented in this paper,which is beneficial for the engineering technicians to employ this formula when they calculate the safety relieve capacity.%计算火灾时盛装液化气体容器的安全泄放量是工程技术人员经常要碰到的问题，从国内外众多文献中可知，计算时的基本思路就是先求得容器吸热量，该吸热量再除以液化气体介质在泄放状态下的汽化潜热，即可得容器所需要的安全泄放量。目前，国内外使用的标准规范在涉及到这一问题时基本上是采用API Std 521—2007中相应公式，本文对公式的推导过程进行解析，有助于工程人员正确使用其来进行计算。