Leakage in the tube bundle of the hot water heat exchanger for the fractionation top cycle oil in the catalytic unit
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The heat exchange tube bundles for the fractionation overhead circulation oil and hot water in the catalytic unit often leak; their service life is at most 3 years. What is your unit’s service life? Are there any effective ways to prevent this (for corrosion protection inside and outside the tube bundles)?
First, it’s necessary to analyze what the actual cause of the leak is—whether it’s corrosion, material issues, or installation problems—so that appropriate measures can be taken
After we replaced the tubing with stainless steel, there have been no leaks since. :lol
Top circulation cooling results in water precipitation, with a pH of 4. The heat exchanger has been anti-corrosion treated on both the inside and outside; there shouldn’t be any leaks.
Is stainless steel frequently used in this heat exchanger? How effective is it in use?
Mm. Previously, it was a tube bundle made of 10# steel. It’s pretty much the same as what you said.
After replacing it with stainless steel, is anti-corrosion treatment still needed? Could chloride corrosion occur?
There was no preservative treatment, and no corrosion occurred. Before switching to stainless steel, the tube bundles tended to develop perforations; however, after four years of use with stainless steel, no significant corrosion was observed during major maintenance and cleaning inspections.
The material selected for the oil-gas/hot water heat exchanger at the top of the catalytic fractionator is 254SMO. The tube bundle of the top circulation-hot water heat exchanger is made of carbon steel.