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Recovery And Protection Of Old Heat Exchanger With Belzona



Petrochemical (PETR)



Heat Exchangers (HEX)


Customer Location:

Oil Refinery, Bulgaria


Application Date:

November 2015


Application Situation:

Old heat exchanger in oil refinery cooling benzene fractions with hydrogen sulfide at working temperature up to 70°ะก.



Surface of the tube sheets were badly corroded and required recovery and protection to stop unwanted leakages.



Belzona 1391T 

Belzona 9411 (Release Agent)



Steel and Brass


Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflets HEX-1 and HEX-3. After grit blasting, erosion damage was rebuilt before applying Belzona 1391T for overall corrosion protection. A special flange shaped former was coated with Belzona 9411 and positioned so the flange remained uncoated. 


Belzona Facts:

The customer needed a quick and economical repair of the heat exchangers without compromising the quality or performance and reliability for long service life. Belzona 1391T is applied without the need of specialist tools and also can achieve full cure in service. This Belzona repair saves the customer time and money.


Photographs Description

  1. Grid blasted plate
  2. Formers and cork plugs used to limit the repair area
  3. Corroded areas rebuilt with Belzona
  4. Application completed after 2 coats of Belzona 1391T and cork plugs pulled out
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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