KHIA headerKnow-How in Action

VOL XXV, NO 28, ELITE

Four Belzona® Repaired Condensers Still In Service After 17 Years

 
 

Industry:

Buildings & Structures (BSTR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Power station, Thailand

 
 

Application Date:

October 1993

 
 

Application Situation:

Four main condensers with a total of eight tube sheets

 
 

Problem:

Corrosion pitting had occurred around the tubes as a result of bi-metallic corrosion effects and the chloride content of the used river water.

 
 

Products:

Belzona® 1311 (Ceramic R Metal)

Belzona® 1321 (Ceramic S Metal)

 

Substrate:

Carbon steel

 
 

Application Method:

The application was carried out in accordance with the Belzona Know-How System Leaflet HEX-1. Belzona® 1311 was used for rebuilding and Belzona® 1321 for the coating of the tube sheets.

 
 

Belzona Facts:

Since the application of the coating, regular inspections took place which proved the excellent performance of the Belzona coating. In 2005, the complete coating of the tube sheet was still intact without showing any signs of degradation. A further inspection in 2010, after 17 years in service, also showed that the coating was still in a good condition. Only 10% of the surface was locally damaged due to mechanical damage. These areas were quickly repaired with Belzona before the tube sheet was put back into service.

 
 

Photographs Description

  1. Corroded tube sheet before application in 1993 
  2. Standard application underway. Special care was taken to prevent contamination of substrate) 
  3. Inspection in 2005 
  4. Inspection in 2010
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com