This standard specifies the test method for evaluating the mechanical impact resistance of glass-lined layers, which is a destructive test. It involves a steel ball of a specific mass being dropped freely from various heights onto a flat glass-lined sample. The impact energy is calculated based on the falling height of the steel ball when the sample first exhibits cracks or peeling, thereby accurately assessing the impact strength of the glass-lined layer. This test is crucial for ensuring the operational safety of glass-lined equipment in industries such as chemical and pharmaceutical. The core instrument used in actual testing is the glass-lined impact resistance tester (also known as the drop ball impact tester). Such equipment is typically equipped with an electromagnetic release mechanism and a laser rangefinder to ensure precise control of the steel ball's falling height. Some high-end models also integrate sensors and automated control systems, enabling electric height adjustment and automatic data collection, significantly improving testing efficiency and accuracy.