Corrosion of carbon steel tube bundles in the reduced-pressure pre-condenser of petrochemical atmospheric and vacuum distillation units and recommendations
Thread Content
The figure below shows the corrosion condition of the carbon steel tube bundle in the overhead vacuum pre-condenser of petrochemical atmospheric and vacuum distillation units. The medium on the outer wall of the tube bundle is oil, gas, and water vapor, at a temperature of around 60 degrees. The inner wall of the tube bundle is filled with deep well water at a temperature of around 25 degrees. After more than 2 years of use, the tube bundle has suffered significant corrosion. For such corrosion of carbon steel tube bundles, using coating for corrosion protection yields good results.
What does it mean to use deep well water as circulating cooling water? Thank you for sharing this, Nash. The vacuum pump makes a whistling sound: https://bbs.hcbbs.com/thread-5669444-1-1.html (Source: Haichuan Chemical Industry Forum)
To address the corrosion issue of the carbon steel tube bundles in the degasifier pre-condensers of petrochemical atmospheric and vacuum distillation units, the following measures are recommended: 1. Use corrosion-resistant materials in new tube bundles or those that have been replaced, such as stainless steel or carbon steel coated with anti-corrosion coatings. 2. Regularly inspect and maintain the tube bundle to detect and address corrosion issues promptly. 3. Apply appropriate anti-corrosion coatings to the inner and outer walls; using high-performance anti-corrosion paints can effectively extend the service life of the tube bundle. 4. Strengthen water quality management in the piping system to ensure the cleanliness of the internal medium and reduce corrosion rates. 5. Implement regular cleaning and maintenance procedures to reduce the accumulation of corrosive substances. .
Study hard* make progress every day – the forum is even better with you!