Analysis of Boiler Tube Failure

Authors : R.Karthikeyan, C.Karthick Srinivas, U.Logeshwaran.

Volume/Issue : Volume 3 - 2018, Issue 3 - March

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The Causes and mechanisms of failure area unit mentioned and recommendation for hindrance of reoccurrence of such failure is provided. The tubes had circumferential cracks and blown up parts. All the failures were detected on the fire-side surfaces of the tubes. Presence of sulphur within the oil ash deposits on the fireside of the tubes seems to be the most reason for failure of boiler tubes. The cracking of the tube at the wellintentioned was thanks to the combined result of Sinduced corrosion and attachment stresses. Circumferential fissures initiated by the liquefied ash were increased greatly thanks to attachment stresses and resulted within the cracking of tube Ate the part. it’s counseled to avoid high sulphur within the fuel and to take care of an occasional metal temperature within the boiler. Super heater tubes of boiler of thermal powerhouse were found busted. The rupturing and hole formation within the superheated tubes is that the results of long run heating of the tubes. dilution of tube walls occurred thanks to localized deposits and heating issues. For avoiding reoccurrence of such failures it’s counseled to hold out regular scrutiny of scale deposition on the steam/water facet surface and mensuration of degradation within the boiler tube thickness. If the number of the deposits has crossed the allowable limit, cleanup of the tubes ought to be distributed right away.

Keywords : Corrosion, Fatigue failure, Erosion, Overhea Ting.


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