This standard specifies the specific method for testing the spalling resistance of insulating refractory bricks, applicable for evaluating the surface layer spalling phenomenon of refractory materials caused by temperature differences. The test adopts the air-cooling method, which involves heating the specimen with a gas blowtorch and rapidly cooling it. By continuously observing and recording the spalling condition of the specimen after multiple thermal cycles (such as spalled area, mass loss, etc.), its spalling resistance is assessed. The core equipment for conducting this test is the blowtorch heating and air cooling cycle system. The standard provides a detailed description of the system's composition, procedures for heating and cooling cycles, as well as how to measure the spalled layers and present the results.