压力容器2024，Vol.41Issue(7)：49-55,7.DOI:10.3969/j.issn.1001-4837.2024.07.007
API 521-2020火灾环境下气体压力容器安全泄放量计算讨论
Discussion of safety relief capacity calculation of gas pressure vessels under fire environment in API 521-2020
摘要
Abstract
To further understand the venting design of pressure vessel,the issue of safety relief capacity calculation of gas pressure vessels under fire environment was aimed.The mass and energy balance equations during pressure vessel venting process were derived.The simplified assumptions for solving the equations were analyzed.The derivation of the calculation formula for safety relief capacity of gas pressure vessels under fire environment in API 521-2020 was clarified.The influence of each simplified assumption on the calculated safety relief capacitys was studied.Results indicate that,the API 521-2020 formula for calculating the safety relief capacity is based on the mass balance and energy balance equations,and is appropriately simplified for engineering purposes.The assumed and simplified conditions include:Constant pressure during the release process,complete thermal transfer from flame to gas,free convection of vertical plat in large space,engineering simplification of real gas h'/(cpM1/2)using air properties at constant pressure and temperature,ideal gas,and a constant maximum wall temperature is recommended without vessel wall broken.It is concluded that all assumptions and simplified conditions make the calculation of safety relief capacity conservative,which tends to be safe in real used conditions.The research provides guidance for performing overpressure venting of pressure vessels under fire environment.关键词
气体压力容器/火灾环境/超压/安全泄放量/API 521-2020标准Key words
gas pressure vessel/fire environment/overpressure/safety relief capacity/API 521-2020 standard分类
机械制造引用本文复制引用
韩冰,戴行涛,闫兴清,李岳,喻健良..API 521-2020火灾环境下气体压力容器安全泄放量计算讨论[J].压力容器,2024,41(7):49-55,7.基金项目
国家市场监督管理总局重点实验室(气瓶安全技术)开放课题(2023K02) （气瓶安全技术）
