Chemco Case Studies

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Corrosion Protection for Condenser Tube Sheet

Industry                           

Power Generation

 

 Date

2016

 

 Substrate

20 Year Old – Bronze tube sheet

 

 Products

Chem-tect™ RB 300 series, a glass flake filled vinyl ester, provides excellent permeation resistance and high dielectric strength.

 

 Environment

40-60°C, sea water

 

Challenge

To provide a long term solution for the corroded tube ports and tube sheet.

 

Chemco’s Solution

Tube internals were protected by inserting specially ordered silicon plugs to prevent abrasive blasting from damaging wall thickness. Abrasive blast as per required standard and remove silicon plugs and glue nylon tube inserts into position and then pitfill all deep cavities using RB 300 Series. We used the proprietary method to obtain a flat surface using RB 300 Series.

 

Tube bundle protection ready for abrasive blasting
Tube bundle protection ready for abrasive blasting
Close up of some of the damage on tube sheet
Close up of some of the damage on tube sheet
Installation of nylon ferrules and pit filling
Installation of nylon ferrules and pit filling
Tube sheet refurbishment complete
Tube sheet refurbishment complete

 

Results

An estimated replacement cost was in the range of $500K and this refurbishment is expected to extend the life for another 20 years. Chemco is available for all corrosion related issues with nearby ancillary equipment. For more information please feel free to contact Chemco on 1300 CHEMCO (243 626).

 

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