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Blast Furnace Recovery Turbine Repairs

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Blast Furnace Recovery Turbine Repairs

Industry

Steel Manufacturing

Date

2006 – 2020

Substrate

Steel outlet and inlet spools, flange faces, shut off valves, turbine casing components and manway covers

Products

Epo-chem™ RL 500PF externally

Chem-tect™ RB 364 to coat internals

Epo-Chem™ RW 500 for spot repairs

Reinforcement using Kevlar

Spot repairs using Ind-Cote on struts

Environment

Wet blast furnace gas, from 20-40°C

Challenge                  

The overhaul was coordinated and planned for the completion of some components in Chemcote’s workshop

On-site work was carried out by setting up appropriate containment and navigating difficult to access areas to achieve thorough cleaning and surface preparation

Chemcote’s Solution

Apply Chem-tect RB 364 series to the internals of the pipework and casings in 2 coats where possible.

This glassflake filled vinyl ester has proven to be most suitable for applications where good corrosion resistance and excellent mechanical properties are required.

set up of containment
Set up of Containment

masking before blasting
Masking Before Blasting
spool condition before coating
Spool Condition Before Coating
outlet spool shut off valve
Arial view of Outlet Spool from Shutoff Valve
outlet spool internal
Completed Outlet Spool Internals
application of final wrapping layers on legs
Application of final wrapping layers on legs
internal and external coating
Internal and external coating complete
completed outlet spool
Coated and ready for reassembly on site
coated outlet spools
Coated and ready for reassembly on site
outlet spools on site
Ready to be reinstalled on site

Scope                      

Full treatment where required;

Pressure wash, abrasive blast internals and externals

Full abrasive blasting was carried out on internals on-site for full refurbishment 

Seal redundant holes and split rings using polyurethane.

mechanical preparation and small touch-up repair.

Results                

Chemcote has successfully reduced long term maintenance costs by carrying out intermittent inspections and documenting recommendations for coating systems used over the 14year service duty