Detect Boiler Tube Leakage by Acoustic Instrument early to avoid secondary damage to pressure parts

There must be constant vigil on possibility of Boiler Tube Leakage because small negligence may result into heavy leakage to pressure parts of Boiler,its refractories and even to its Structure Beams etc.We must constatly watch furnace vaccum which must be maintained -10 to -20 mmwl.If furnace vaccum is disturbed then we must physically inspect boiler for hissing sound of leakage of steam.Nowadays some Acoustic Instruments also available which may detect steam leakage from boiler tube.Feed water flow is another parameter which must be watched carefully to judge boiler tube leakage.Any increase of feed water flow and decreasing of deaerator level must be seriously examined.



There are several type of boiler tube leakage such as Super Heater Leakage,Water Wall Leakage and Economiser Tube Leakage,all type of boiler tube leakage are seriously dangerous for Boiler.In some cases I have seen that Economiser leakage not taken seriously and unit allowed to run for some time which resulted into chocking of Air Heater Tube which resulted into pressurisation on Boiler Furnace.


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