KHIA headerKnow-How in Action


Belzona® Protects Flanges Of Concrete Lined Pipework



Power (POWR)



Valves, Pipes and Fittings (VPF)


Customer Location:

Power Station, Germany


Application Date:

August 2002


Application Situation:

Installation of additional valves into concrete lined cooling water pipework (ranging from 400-1200mm)



The cutting of the pipes damaged the concrete lining and would have resulted in crevice corrosion on the flange face and corrosion creep under the concrete. It was not practical to repair the concrete with more concrete.



Belzona® 1111 (Super Metal)

Belzona® 9411 (Release Agent)



Concrete and Carbon Steel


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflets VPF-3, -13.


Belzona Facts:

Fourteen Flanges were protected and all works completed within two days. The cooling water system operates with a maximum pressure of three bar. After inspection following three years service, the satisfied client has specified the use of Belzona 1111 for other damaged concrete lined pipes


Photographs Description

  1. Blasted steel flange face – note concrete lining also prepared 
  2. Use of formers as per VPF-13.
  3.  Completed application 
  4. Inspection after 3 years service
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: