Corrosion of Welds in Carbon Steel Deaerator Tanks

3 Corrosion of Welds in Carbon Steel Deaerator Tanks 

Deaerator tanks, the vessels that control free oxygen and other dissolved gases to acceptable levels in boiler feed water, are subject to a great deal of corrosion and cracking. Several years ago, there were numerous incidences of deaerator tank failures that resulted in injury to personnel and property 

Since that time, organizations such as the National Board of Boiler and Pressure Vessel Inspectors and the Technical Association of the Pulp and Paper Industry have issued warnings to plant operators, and these have resulted in the formation of inspection programs for evaluating the integrity of deaerator tanks. As a result, many operators have discovered serious cracking problems. The following example illustrates the problem. 

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