Dear Sirs,
In our plant, we have a furnace and waste heat boiler system.
The refractory has been cured, but there has been formed some cracks on the ceramic tubes at the inlet of waste heat boiler. Despite those cracks are not so big, they are not too small, too.
How can we understand that these cracks are important or not?
What are the crucial parameters to be considered for the refractory inspection?