KHIA headerKnow-How in Action

VOL XXVI, NO 80

Belzona® Seals Leaking Cable End Bushings

 
 

Industry:

Power (POWR)

 
 

Application:

Valves, Pipes and Fittings (VPF)

 
 

Customer Location:

Electricity Substation, UK.

 
 

Application Date:

June 2012

 
 

Application Situation:

Cement Joint between porcelain and steel flange disintegrtaed on three bushings - red, yellow and blue phases.

 
 

Problem:

The red phase bushing was leaking oil and the uncontrolled release required sealing. The equipment is aged and the porcelain shed appeared to be fragile and brittle. The Client opted for competitively priced repair as opposed to high cost replacement with a view to extending the asset life.

 
 

Products:

Belzona® 1291 (ES Metal)

Belzona® 1221 (Super E Metal)

Belzona® 1161 (Super UW Metal)

Belzona® 5831 (ST Barrier)

 

Substrate:

Porcelain & Mild Steel

 
 

Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflet VPF-11. After cleaning sand abrading tjhe substrate, Belzona® 1291 & Belzona® 1221 to stem leak between porcelain and steel joint before applying Belzona® 1161 including Reinforcement Tape. Finally Belzona® 5831 was applied to entire repair area.

 
 

Belzona Facts:

The Client has deemed this applicationa trial and upon success, wish to proceed with many other bushing repairs which remain unchecked throughout the Network. No other alternatives were deemed to provide a solution offering longevity and extend the asset life. The Belzona cost comparison to replacing with new was exceptionally competitive. The repair was undertaken without removal of oil and remained under pressure during the application.

 
 

Photographs Description

  1. Original bushing condition
  2. Repair area after applying Belzona® 1291, Belzona® 1221 & Belzona® 1161
  3. Final coating with Belzona® 5831
  4. Completed application
 
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