KHIA headerKnow-How in Action

VOL XXII, NO 104, ELITE

Belzona® Elastomers Seal Sf6 Gas Leaks At Hydroelectric Facility

 
 

Industry:

Power (POWR)

 
 

Application:

Gaskets, Seals and Shims (GSS)

 
 

Customer Location:

Hydroelectric Facility, BC

 
 

Application Date:

1993

 
 

Application Situation:

Leaking joints Gas Insulated Switchgear (GIS)

 
 

Problem:

The constant leakage of Sulphur Hexafluride gas (SF6) was considered to be a major environmental problem being 25,000 times as effective a "greenhouse gas" as CO2. System is pressurized to 45 psi.

 
 

Products:

Belzona® 2211 (MP Hi-Build Elastomer)

Belzona® 2221 (MP Fluid Elastomer)

Belzona® 1321 (Ceramic S Metal)

 

Substrate:

Various metal substrates

 
 

Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflet GSS-4. Pinholes in welds were coated with Belzona® 1321. Flanged joints were sealed with Elastomer using a combination of brush application and injection.

 
 

Belzona Facts:

The Belzona materials applied in 1993 have proven completely effective with joints and welds sealed with Belzona materials remaining sealed for well over a decade now. SF6 consumption has dropped from over 50 bottles per year, to a mere two or three bottles—a saving in excess of $1 million over the decade. Most importantly losses of SF6 into the atmosphere have been minimized, drastically reducing the environmental impact.

 
 

Photographs Description

  1. Belzona® 2211 MP Hi-Build in the process of being injected into the gap between the two flanges
  2. Another variation of a similar application
  3. Another flange sealed
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 

 

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