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VOL XXII, NO 159

Belzona® 1511/1591 Take The Heat

 
 

Industry:

Power (POWR)

 
 

Application:

Gaskets, Seals and Shims (GSS)

 
 

Customer Location:

Tennessee Valley Authority, North Alabama U.S.A.

 
 

Application Date:

November 2003

 
 

Application Situation:

The LP turbine flange on a steam generator turbine.

 
 

Problem:

Steam cuts in the metal diaphragm. Welding would distort the flange and a short outage caused them to come to Belzona for an unconventional alternative.

 
 

Products:


Belzona® 1511 (Super HT Metal)
Belzona® 1591 (Ceramic XHT)
 

Substrate:

Cast steel

 
 

Application Method:

Application carried out in accordance with Belzona Know-How System Leaflet GSS-6. Belzona® 1511 used to rebuild damage (up to 1/2"), then machined to profile before coating with Belzona® 1591.

 
 

Belzona Facts:

Time for welding was too long. Welding may distort the flange. Belzona 10% the cost of the alternative. After five years it was inspected and only minor touch up required.

 
 

Photographs Description

  1. Eroded flange before repairs
  2. Belzona® 1511 being used to build back the edges and steam cut areas
  3. Belzona® 1511 built back to original profile and ready to machine
  4. Belzona® 1591 coated after the two pieces put together for machining
 
 
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For more information about Belzona visit: www.belzona.com