RESTORING AND COATING E5B HEAT EXCHANGER FACE
KHIA ID: 9288Industry: Steel & Metal Processing (STEL)
Application: HEX-Heat Exchangers (HEX)
Substrate: Carbon steelCustomer Location: Brazil
Application Date: July 2011Products: Belzona 1111 (Super Metal),Belzona 1321 (Ceramic S-Metal)
Problem: Galvanic corrosion on the tube face, caused by contact of 2 dissimilar metals.
1.) Before application
2.) After Blasting
3.) Applying Belzona 1111 for the rebuild
4.) Final application - removal of corks
Application Situation
Rebuilding and coating a heat exchanger in situ, the heat exchanger is used to transfer heat used in the steel manufacturing process.Application Method
The application was carried out in accordance with system leaflet HEX-01.The application area was marked out before the tube face was grit blasted to SA2.5, achieving a minimum 75-micron profile. After blasting, the tube face was rebuilt with Belzona 1111, followed by 2 coats of Belzona 1321, each coat was applied at 250-375 microns. After the Belzona had cured, a visual inspection was carried out and any areas requiring touch-ups were marked up, abraded, and then re-coated.
Before the HEX was put back in service, the equipment passed a hydrostatic test carried out by the client under a pressure of 30 kg/cm².