STUDY OF COMPONENT SAFETY LEVEL (RELIABILITY) IN STEAM BOILER
Keywords:
Life expectancy, probability, predictability, safety, boilerAbstract
Every steam power plant has problems in operation, especially problems related to the
reliability of components in the boiler system because of the presence of random technical
(operator negligence), technological and statistical errors (poor maintenance). This study aimed
to measure the reliability of the boiler components. This research study is focused on steam
boilers at the Mechanical Engineering Plant Laboratory at Ungku Omar Polytechnic, Ipoh. The
risk assessment of components failure is carried out using Event Tree and Fault Tree probability
methods to predict the life of the boiler and ensure the system is always in a safe state.
Quantitative methods use Microsoft Excel software for manual calculations and Reliasoft
BlockSim 7 software for qualitative evaluation methods for this system. Identifying the meantime
between failures is necessary, reducing factors in situations where exploitative parameters are
within the normal limits. From the results of the study on the components of the boiler, it was
found that the reliability of the Low Water Alarm component was 95.7%, Gauge Glass 18.3%,
Safety Valve 97.8%, Main Stop Valve 97.8%, Pressure Gauge 65.7%, and Low Water Fuel Cut-
off Device 32.0%. The overall reliability of the boiler system is 86.6%. The steam boiler is still in
a safe condition to operate. The results can be used to improve preventive maintenance systems
and choose the most reliable operation performance.
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