After how many hours can mock-up panels be stripped for visual inspection?

The correct time frame for stripping mock-up panels for visual inspection is 12 hours. This duration is crucial because it ensures that the refractory material has had sufficient time to cure and develop the necessary properties for accurate evaluation. Stripping too early could lead to issues such as deformation or damage to the panel, which might compromise the assessment of the installation's quality and the effectiveness of the refractory lining.

This timeframe falls within standard industry practices, allowing for a balance between timely inspections and adequate curing times. The purpose of these inspections is to verify that the installation meets specifications and design requirements before moving forward with larger applications, so adhering to the recommended wait time is essential for ensuring the integrity of the assessment process.