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refractory insulation repair 4

https://getprocesspipingcontractorsway.talesignal.com/posts/what-to-look-for-in-experienced-process-piping-contractors

We had to patch up the old refractory insulation in the furnace last week. The ceramic fibers were crumbling near the burner, so we applied a new rigidizer coating and several layers of high-alumina blanket to seal the hot spots. The repair was tricky because the material has to withstand direct flame and retain heat, but after a 24-hour cure, the lining looks solid and the surface temperature readings have dropped back to normal.