Dwi Maryuana Restu, 2018, NIT: 50134964.T, “Water Quality Analysis for Steam
Boiler Operation at MV. NYK Vega”, Program Diploma IV, Technical,
Merchant Marine Polytechnic of Semarang, Supervising I: Abdi Seno,
M.Si, M.Mar.E and Supervising II: Andy Wahyu Hermanto, S.T, M.T.
The steam boiler is a closed tube that can produce steam at a pressure greater
than one atmosphere, by heating the water within the boiler. The availability of hot
steam is essential for the smooth operation of machinery in need, for example for
F.O fuel heater, freshwater heater, and others. Water used in the process of steam
formation is very influential on the condition of the boiler. A decrease in water
quality can affect the operation of the boiler, so water quality should always be
maintained.
Research method that writer use in preparation of this thesis is descriptive
qualitaf research method. In this case the writer use the SWOT method as a data
analysis technique to analyze what factors cause the decrease of boiler water quality
and what efforts are done to overcome these factors by identifying strengths,
weaknesses, opportunities, and threats from the environment systematically to
formulate the strategy to be taken.
Based on the result of the research that has been done by the writer, it can be
concluded that water boiler degradation is caused by two factors, 1) distillate water
not yet widely available in ship caused by leakage of evaporator pipe on FWG and
mechanical seal damage at distillation pump. 2) Freshwater conditions from land
are not suitable for boiler water. To overcome these factors can be done by checking
to determine which pipe is leaking, patching the leaking pipes using copper plugs,
opening and closing the inlet valve and water outlet of the evaporator heater slowly
to avoid thermal shock which can cause pipeline leakage, mechanical replacement
seal on the distillation pump, and testing of boiler water on board, addition of
chemical dosing and water boiler blowdown.
Keywords: boiler, water quality, SWOT.
