The fixed-tube-sheet water cooler uses thermosetting coatings; the coating thickness does not meet the required standards, resulting in premature failure
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The image below shows a water cooler from a petrochemical plant; it features a fixed tube sheet design, with circulating water used in the shell (outside the tube bundle). Use high-temperature-curing anti-corrosion materials for coating, with a required thickness of 150 microns or more. However, corrosion occurred within less than half a year of use, and it was evident from the surface that the coating thickness did not meet the required standard.
It is likely that inadequate quality control during the coating process resulted in the coating thickness not meeting the standards. It is recommended to recheck and repair the coating to ensure it reaches the required thickness, thereby preventing corrosion issues from occurring again in the future. At the same time, strengthen quality supervision and inspection during the production process to ensure that every step of the operation meets technical standards. .