What must happen if there is a disagreement over the quality of installed refractory?

In situations where there is a disagreement over the quality of installed refractory, taking core samples and retesting is a standard procedure used to objectively assess the quality of the material. This process involves extracting portions of the installed refractory for analysis, which allows for an evaluation of its properties and adherence to specifications.

Gathering core samples provides a direct and practical means of determining whether the installed refractory meets the necessary standards and performance expectations. Retesting these samples can reveal any issues with the installation or material quality, and the results can serve as evidence in resolving the disagreement. This approach is both efficient and less disruptive compared to completely replacing materials or reinstalling the entire system.

The other options involve more drastic measures or negotiations that may not directly investigate the original concern about quality, making core sampling and retesting a more focused and effective method in addressing disagreements over installed refractory quality.