GB/T 38092-2019 specifies the melt flow test method for the fluidity of enamel products and porcelain enamel. The standard is based on the melt flow characteristics of porcelain enamel at high temperature to determine flowability. The technical parameters of the required high temperature furnace and other instruments are clarified, and the preparation process of enamel products and porcelain enamel samples is described in detail. The specific operation of observing and measuring the flow state of porcelain enamel after melting under specific heating procedures and high temperature environments is described, and the data processing and result expression are standardized. It provides a unified standard for accurately evaluating the flowability of enamel products and porcelain enamel, and helps the mass control and process optimization of related products.