GB/T 44576-2024 specifies test methods for the opening torque, closing torque, and rotational torque of thermoplastic plastic valves, applicable to manually or power-driven thermoplastic plastic valves used for fluid transport. The standard is conducted in an environment of (23±2)℃, using water, air, or nitrogen as the medium, and defines requirements for specimen conditioning, pressure control, and operational procedures. The tests require torque testing equipment with an accuracy of ±2% and pressure testing instruments with an accuracy of ±1%, combined with valve fixation devices and medium delivery components, to accurately record torque data during valve opening and closing. This provides a unified technical basis for quality control of valves, system matching design, and safe operation.