How to address corrosion on the oil and gas side of heat exchanger tubes in the petrochemical industry?
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The image below shows the corrosion on the oil and gas side of the tube bundle in the petrochemical water cooler. The general operating conditions are gasoline, oil and gas ； Temperature less than 150 degrees ； The pressure is less than 1 MPa. Generally, tube bundle corrosion is relatively severe after nearly 1 year of use. Some of the tubes in individual bundles have suffered corrosion and perforation. Take a look to see if there are any good anti-corrosion methods that can be used to solve this issue.
To address the corrosion issue on the oil and gas side of heat exchanger tubes in the petrochemical industry, the following methods can be adopted: 1. Material selection: Use materials with high corrosion resistance to manufacture the tube bundles, such as stainless steel, titanium alloys, or nickel-based alloys. 2. Anti-corrosion coating: An anti-corrosion coating is applied to the inner wall of the pipe, such as an epoxy resin coating or a polytetrafluoroethylene (PTFE) coating. 3. Cathodic protection: This technique is used to reduce the corrosion rate of the tube bundle by employing sacrificial anodes or applying an external current. 4. Strengthen monitoring and maintenance: Regularly inspect and clean the tube bundles, and identify and address any signs of corrosion at an early stage to prevent it from worsening. 5. Process adjustment: Optimize operating conditions, such as adjusting temperature and pressure, to reduce the contact time between corrosive media and the tube bundle. By combining the above measures, it is possible to effectively extend the service life of the heat exchanger tubes and reduce the maintenance and replacement costs caused by corrosion. .
Swap the core; consider whether stainless steel would work
It’s similar to our operating conditions: liquefied gas in the tube side, with a very high hydrogen sulfide concentration; the tube bundle needs to be removed every little over three months. Last year, zinc plates were added to the end caps, but the effect wasn’t very significant – corrosion still occurs as usual.
Based on the properties of the raw materials, choosing high-quality tube bundles is beneficial for the long-term operation of the equipment