BELZONA REPAIR TO DIAPHRAGMS IN STEAM TURBINE

KHIA ID: 126
Industry: Power (POWR)
Application: CEP-Centrifugal Pumps (CEP)
Substrate: Cast Iron
Customer Location: Power Plant in Indianapolis
Application Date: February 1995
Products:

Belzona® 1311(Ceramic R-Metal)

Belzona® 1391

Problem: Severe erosion/ corrosion of the turbine diaphragms in the the latter stages of the low pressure side of the steam turbine. This had been caused by many years exposure to saturated steam and had resulted in a decrease in efficiency in the turbine.
Photograph Descriptions
  1. Erosion damage on the diaphragm   
  2. Application of Belzona® 1311 to restore profiles   
  3. Application of Belzona® 1391 underway
Application Situation
Diaphragms in steam turbine
Application Method
Modified versions of Belzona Know-How Leaflets CEP-5 and CEP-3. Belzona® 1311 was used to rebuild the damaged areas. Sites rebuilt were then treated with two coats of Belzona® 1391.
Belzona Facts
Welding was considered as an alternative method of repair. Downtime would have increased from three days, utilising Belzona, to three weeks if welding had been chosen.
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