GB/T 7991.3-2021 "Test method of viterous and porcelain enamels—Part 3：Determination of resistance to thermal shock"

This standard specifies the test method for the performance of the Glass-lined layer to withstand the sudden change of temperature difference, which is suitable for the determination of the Glass-lined plate specimen. By heating the sample to a specific temperature, quickly spray cold water to observe whether the Glass-lined layer is damaged, such as bursting porcelain, cracking, etc. During the test, the temperature difference is gradually increased until the Glass-lined layer is damaged to determine the temperature difference and sudden change temperature. This standard provides a scientific basis for evaluating the tolerance performance of the Glass-lined layer under the condition of drastic temperature change.

This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.