GB/T 4732.4-2024

This standard specifies the stress classification method for the design-by-analysis of pressure vessels, defining how to categorize stresses into primary, secondary, and peak types for elastic stress analysis. It is applied in the engineering design and integrity assessment of high-pressure and critical-service pressure vessels in industries such as petrochemical, chemical, and power generation, where detailed stress evaluation is required beyond conventional design-by-rule approaches. The standard ensures that vessels subjected to complex loading conditions meet safety and durability requirements through rigorous stress categorization and allowable limits.