Please help me find out what is causing this?
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Pipe side medium circulating water, shell side liquefied gas, operating temperature 30 degrees Celsius, working pressure 0.4
Not a crack. The circulating water corrodes, and the welding flesh between the heat exchange tube and the tube sheet is corroded. Solve the water quality problem of circulating water.
Is it industrial water? It's a bit like pitting corrosion on carbon steel caused by high levels of chloride ions in water.
It is best to describe the operating conditions, materials, and equipment types of the tube and shell process in detail. Isn't it a fixed tube sheet? Is there a big temperature difference between the tube and shell side? Different amounts of expansion cause pull-out? Incomplete information, not sure
Personally, I think it is caused by chloride ion corrosion. It is recommended to analyze the ion content index of circulating water.
Corrosion caused by circulating water is normal. Pay attention to updating the pipes in time. Pay attention to detecting internal leakage, which may cause liquefied gas to leak into the circulating water. The consequences will be serious.
Many now add safety valves on the water side. What we have is liquefied gas flowing into the circulating water, and then leaking out at the cooling tower. There happened to be hot work in the area, causing an explosion, and several people died. The fire water and circulating water were in one system, and then a fire truck was burned down.
Test the composition of the circulating water and talk about the materials of the heat exchange tubes and tube plates.
Corrosion caused by circulating water is normal. Pay attention to updating the pipes in time.