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VOL XXVII, NO 46

Corroded Flange Grooves Reformed With Belzona

 
 

Industry:

Power (POWR)

 
 

Application:

Valves, Pipes and Fittings (VPF)

 
 

Customer Location:

Hydropower plant, Switzerland

 
 

Application Date:

February 2012

 
 

Application Situation:

Flange grooves in four pipe flanges. Each flange had a diameter of 1820mm; the grooves were 16mm wide and 3-4mm deep.

 
 

Problem:

Corrosion leading to incorrect sealing of mating surfaces

 
 

Products:

Belzona 1111 (Super Metal)

Belzona 1321 (Ceramic S-Metal)

 

Substrate:

Steel

 
 

Application Method:

Application was carried out in accordance with Belzona System Leaflet VPF-1. After grit blasting the groove, Belzona 1111 was packed overthick into the groove and, using a simple pre-cut template, the original profile of the groove was recreated. Finally, a thin layer of Belzona 1321 was applied to create a smoother surface.

 
 

Belzona Facts:

Welding would have taken three to four weeks for two people to complete, a considerable delay in the refurbishment of this hydropower plant. The simple and cold-applied Belzona solution was carried out in just six working days by three people and now ensures long-term corrosion protection of the liner grooves.

 
 

Photographs Description

  1. General view of the equipment before application 
  2.  A pre-cut template allows for simple, effective defining 
  3. Belzona 1321 applied for a smoother surface 
  4. Pressure pipe after re-assembly
 
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