KHIA headerKnow-How in Action


Belzona® 1511/1591 Take The Heat



Power (POWR)



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.



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.



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


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
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: