For "As installed material," what minimum cold crushing strength percentage is required?

The minimum cold crushing strength percentage required for "as installed material" is significant because it indicates the ability of the refractory material to withstand compressive stresses without failure after installation. A cold crushing strength of 80% ensures that the material can support the operational stresses encountered in service, providing durability and stability under temperature fluctuations and mechanical impacts.

Having this threshold means that the refractory must be properly installed and cured to achieve the necessary strength, which is essential for maintaining the integrity of industrial equipment and processes. Materials that don't meet this minimum requirement may lead to premature degradation or even catastrophic failure in service, resulting in costly repairs and downtime.

This 80% threshold is based on industry standards that dictate safe and effective performance for refractory materials in high-temperature environments, ensuring that they can handle the operational demands placed upon them after installation.