What is equipment preservation?
Equipment preservation is the process of preserving critical equipment to prevent it from moisture which may lead to corrosion.
During plant shut down and turnaround, the critical equipment has to be kept idle. During idling, these equipment have to be prevented from moisture. Moisture can lead to corrosion which may further result in:
The rate of corrosion accelerates when the relative humidity crosses the critical level of 45%. Above this level, industrial pollutants like sulphur-di-oxide also enhance the rate of corrosion. Also, the rate of corrosion will be more when the surface is exposed to polluted air in combination with high relative humidity. In certain cases, a shut down can go on for a complete year where TDS can give guaranteed required climate conditions which can prevent any kind of corrosion.
Dehumidification involves drying the air by removing the moisture. Removal of moisture from the storage area lowers the relative humidity of the area, hence, effectively arresting corrosion and microbial growth. During equipment storage, proper dehumidification ensures minimum deterioration of all the internal systems.
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