KHIA ID: 1183
Industry: Power (POWR)
Application: GSS-Gaskets, Seals and Shims (GSS)
Substrate: Cast steel
Customer Location: Tennessee Valley Authority, North Alabama U.S.A.
Application Date: November 2003

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

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.
Photograph Descriptions
  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
Application Situation
The LP turbine flange on a steam generator turbine.
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.