Which method can be applied in the testing of castings as per installation work?

The method of vibration in the testing of castings is essential for ensuring that the refractory material is uniformly compacted and free of air pockets or voids. This is particularly important as it affects the integrity and performance of the cast installation. Vibration helps to settle the material into any crevices and ensures that it adheres properly to the surfaces it is designed to protect or insulate.

Using vibration during installation significantly improves the mechanical properties of the casting, leading to better thermal conductivity and durability. It allows for a more consistent material distribution and enhances the bonding between layers and the substrate.

In contrast, hand packing, air blasting, and water curing have different roles in the broader context of refractory installation and testing but do not specifically relate to the method used for improving the quality of castings during the installation process as effectively as vibration does.