What is the required size for a test panel in pneumatic gunning?

The required size for a test panel in pneumatic gunning is established to ensure consistency and accuracy in testing the material's application and performance. A test panel of 24 inches by 24 inches provides a sufficient surface area for evaluating bond strength, material behavior, and the effectiveness of application techniques.

This specific size allows for a representative evaluation of the gunning material’s performance characteristics across a wide range of applications, enabling better assessment of workability, adhesion, and characteristic surface finish. Establishing a standard size simplifies the training and certification processes, ensuring that all personnel are evaluated based on a uniform standard, promoting consistency across different jobs and applications.

While other sizes could potentially be used, the designation of 24 inches by 24 inches strikes a balance between manageability and providing enough surface area for an adequate evaluation of the material properties during testing.