GB/T 42594-2023

This standard provides a classification framework for assessing the hazard level of fluids contained within pressure equipment, such as boilers, pressure vessels, and pipelines. It is applied in the design, manufacturing, and safety evaluation stages to determine necessary protective measures and material selection based on medium toxicity, flammability, and reactivity. The guidelines are primarily used by engineers and safety inspectors in China's chemical, petrochemical, and energy industries to ensure compliance with national pressure equipment regulations.