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