This Zero Liquid Discharge fan was running at 7200RPM with chlorides in the gas stream and had a catastrophic failure. It threw a chuck of the fan wheel straight through the steel housing and out the wall of the building it was inside of. You might think stainless steel can handle anything, but it sure doesn't like chloride stress corrosion cracking.

This Zero Liquid Discharge fan was running at 7200RPM with chlorides in the gas stream and had a catastrophic failure. It threw a chuck of the fan wheel straight through the steel housing and out the wall of the building it was inside of. You might think stainless steel can handle anything, but it sure doesn’t like chloride stress corrosion cracking.