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Maintenance Washing

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  • What is Maintenance Washing
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  • Analyzing contamination
  • Examples of our achievements
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Analyzing contamination

Analyzing contaminations on equipments that needs to be maintenance washed

Analyzing inorganic contaminations by EDS (Energy dispersive X-ray spectrometer)

Collect contamination and scales from pipes, heat-exchanger, etching tanks and filters to do EDS analysis to determine what sort of compounds are forming the contamination.

EDSExample

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Analyzing organic type of contamination by FT-IR (Fourier transform infrared spectrophotometry)

Analyze what kind of compounds are forming dirt and contamination.

Fourier transform infrared spectrophotometry

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Difference between physical cleaning and chemical cleaning

Testing result from removing calcium scales from cooling agent side of oil cooler (shell type)

Evaluation point Physical cleaning Rating Mineral acid
type cleaner		 Rating Cleaning by Nokesole & Pess Rating
Work efficiency bad ２ Inferior ４ good ８
Effects on equipment scratches ２ Melts ３ Fewer melting ８
After washing process Re-assembly ３ Neutralize & rust prevention ５ Close to non ７
After washing process non (Lots of sludge) ８ a lot ４ Relatirely high ５
Cleaning speed Slow but certain ５ Fast (Half day) ７ Moderate (1day) ５
Cost of chemical non 10 Cheap ７ Double ２
Safety Inferior ２ Inferior ２ Safe ８
Fill problem Sludge fill problem ３ Fill problem in small pipes ４ Less chance of fill problem ７

※Evaluation 10: Best, 1:Worst

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