Analysis of the causes of leakage in heat exchangers
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1. Severe corrosion (such as steam mist, hydrogen sulfide, carbon dioxide) causes damage to the tube bundles. 2. Frequent start-up and shutdowns lead to large temperature fluctuations, causing the equipment to expand or contract rapidly, which results in leaks in the flange tubes. 3. Manufacturing defects in the heat exchanger itself, with leakage at the weld joints. 4. As the operating temperature rises, the bolts elongate and the fastening areas become loose, resulting in flange leakage. 5. Leaks are caused by looseness at the assembly site of the heat exchanger tube bundle, tube vibration, thermal shock resulting from startup, shutdown, and emergency stops, as well as mechanical shock arising from improper handling during regular maintenance.
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