KHIA headerKnow-How in Action

VOL XXIII, NO 84

Belzona® Proven Protection Of Steam Turbine

 
 

Industry:

Power (POWR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Vladimirsky Power Plant/ Russia

 
 

Application Date:

July 2003

 
 

Application Situation:

Diaphragm and channels under the end journal of medium pressure steam turbine.

 
 

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.

 
 

Products:

Belzona® 1111 (Super Metal)
Belzona® 1391 (Ceramic HT Metal)
 

Substrate:

Steel/Cast iron

 
 

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.

 
 

Photographs Description

  1. Grit blasting underway
  2. After blasting extent of damage clearly evident
  3. Application of Belzona® 1391
  4. Completed job
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com