RB 300 series used on Self Cleaning Strainer

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RB 300 series used on Self Cleaning Strainer

Industry                     

Power Generation

Date

November 2018

 

Substrate

Carbon steel

 

Products

Chem-tectRB 332, glass flake filled vinyl ester and proprietary reinforced composites

Environment

Sea Water

 

Challenge

A short time frame due to critical power shortage stopping other major processes forced weekend work to commence. Rebuild and reinforce flanges and provide defect free corrosion protection.

 

Chemco’s Solution

Remove failed coating and hot wash components. Stencil existing profiles and make a template. Pre-abrasive blast and hot wash cycle to reduce soluble salts to an acceptable level.

Heavy pitting corrosion including exposed holes
Degree of pitting after repetitive hot wash and abrasive blasting
Casting sealing faces, ready for clean up
Holiday testing to ensure coating continuity

Scope

Abrasive blast to AS 1627.4 Class 3 Application of RB 332 to the internals including flanges. Reinforce casting using Composite repair techniques to reinstate original strength. Holiday testing up to 12kV to detect and rectify defects

 

Results

Refurbishing the self cleaning strainer back wash boxes saved the customer 8 days in fabrication time and money ensuring production is not interrupted. RB 364 will provide long term protection coupled with the addition of composite reinforcement.