BELZONA PROVEN PROTECTION OF STEAM TURBINE

KHIA ID: 1290
Industry: Power (POWR)
Application: CEP-Centrifugal Pumps (CEP)
Substrate: Steel/Cast iron
Customer Location: Vladimirsky Power Plant/ Russia
Application Date: July 2003
Products:
Belzona® 1111 (Super Metal)
Belzona® 1391 (Ceramic HT Metal)
Problem: After more than 35 years (253.000 hours) in-service, inspection during shutdown in 2003, revealed that turbine faced severe stream erosion caused by humid steam. Damages were up to 8 mm wide and 10 mm deep.
Photograph Descriptions
  1. Grit blasting underway
  2. After blasting extent of damage clearly evident
  3. Application of Belzona® 1391
  4. Completed job
Application Situation
Diaphragm and channels under the end journal of medium pressure steam turbine.
Application Method
Application was carried out in accordance with a modified version of Belzona Know-How System Leaflets CEP-3 & -5.
Belzona Facts
After 5 years in-service turbine has been inspected (July 2008) and results were very satisfactory. Channel around the nozzle blades had been preserved 95-100%. Also Belzona® 1391 on the rebuilt areas was practically undamaged. In a zone of phase transition, minor damages were easily repaired.
Testimonial from client expressed complete satisfaction and further use of Belzona planned on other stages of the turbine.
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