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Anti-corrosion performance of the tube bundle on the circulating water side of water coolers in petrochemical coking units

2025-01-24View Original

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The image below shows the corrosion of the tube bundle on the circulating water side of the water cooler in a petrochemical coking unit. The structural type is floating head type. The tube bundle is made of 20# steel, and the operating medium is gasoline outside the tube bundle. Temperature 130 degrees, pressure 1.2 MPa. The inner wall of the tube bundle is: the operating medium is the circulating water inside the tube bundle. Temperature 30 degrees, pressure 0.4 MPa. This tube bundle has been in use for over 2 years, and the tube sheet on the circulating water side is coated with an epoxy-amine thermosetting anti-corrosion coating. As can be seen from the image, the coating will not last even 4 years, and scale has also formed.

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