GB/T 6003.2-2024 "Test Sieves — Technical Requirements and Testing — Part 2: Test Sieves of Perforated Metal Plate" applies to test sieves made of perforated metal plates. It specifies technical requirements for sieve frames and sieve plates, including material, dimensional tolerances, aperture deviations, and open area ratio. The standard defines limits for geometric tolerances such as flatness and perpendicularity, and details the machining accuracy and surface quality standards for sieve plates. It also standardizes testing methods for test sieves, including aperture measurement, sieve surface flatness inspection, and screening efficiency verification. This standard is applicable to the production, inspection, and acceptance of perforated metal plate test sieves used for particle size analysis, ensuring the reliability of screening equipment.