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Friday, April 12, 2019

Case Studies In Failures In Boilers




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Description
Failures occur in boilers due to several reasons. The degree of damages due to failure varies. Some damages are catastrophe in nature. It gets reported due to the magnitude of the damage. Some damages are ignored. Failures can be due to poor design, inadequate instrumentation and poor keeping of boiler in water side and fire side of the boilers, improper operation & inadequate annual inspection. Every failure needs proper diagnosis for taking steps to avoid future incidents. In this paper few case studies are presented.

Content:-
CASE STUDY 1- FAILURE ANALYSIS OF FURNACE SHELL PLATE
* Observations during the visit
* Cause for shell plate failures
* Safety plan
CASE STUDY 2: FAILURE INVESTIGATION OF A HIGH PRESSURE SHELL BOILER
* About this boiler
* Incident
* Observations
* Ruling out water level loss
* Possible failure modes- lamellar tear in raw material
* Possible failure modes- by cyclic stresses
* Possible failure modes- Improper weld
* Absence of sleeve design for feed pipe
* The boiler had failed due to various design defects and poor workmanship only
CASE STUDY 3: DIAGNOSTIC REPORT ON MAIN STEAM LINE FAILURE
* Analysis
* Actions taken to bring down the steam temperature
CASE STUDY 4: DIAGNOSIS OF STEAM DRUM FAILURE
* Observations on inspection
* Conclusion

Author Details
"K.K.Parthiban"
"Sri Devi"
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