Process changes and lack of proper relief systems documentation are some reasons why relief systems may need to be revalidated during the life of a facility. When revalidating relief systems, concerns may be identified such as improper relief device size, high inlet or outlet pressure drop, or unprotected equipment. The solution is often more complicated than you may think. Without expert knowledge of the various recognized and generally accepted good engineering practices (RAGAGEP) related to relief systems, a seemingly simple fix may result in undesired consequences that may lead to a more dangerous situation than the previous design. This paper goes into some examples of undesired effects of relief systems changes, including negative effects on upstream or downstream equipment, effects of changes in relief device set pressure, effects of changes in relief device type, and effects of piping changes.

中文翻译：

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救济系统的不良影响涉及缓解措施

流程变更和缺乏适当的泄放系统文件是泄放系统可能需要在设施生命周期内重新验证的一些原因。在重新验证泄压系统时，可能会发现一些问题，例如泄压装置尺寸不当、入口或出口压降高或设备未受保护。解决方案通常比您想象的要复杂。如果没有与救济系统相关的各种公认和普遍接受的良好工程实践 (RAGAGEP) 的专业知识，看似简单的修复可能会导致意外后果，从而导致比以前的设计更危险的情况。本文介绍了一些泄压系统变化的不良影响示例，包括对上游或下游设备的负面影响、泄压装置设定压力变化的影响、