OVERVIEW: Our client’s strainer has been in service for 30 years. Upon inspection of the strainer body, back wash covers & critical dimensions found the substrate to be severely corroded, illustrated by the extent of graphitised cast iron, holes through the casting and diminishing wall thickness.
INDUSTRY
ENVIRONMENT
Sea Water
SUBSTRATE
Cast Iron
CHALLENGE
Our client’s strainer has been in service for 30 years. Upon inspection of the strainer body, back wash covers & critical dimensions found the substrate to be severely corroded, illustrated by the extent of graphitised cast iron, holes through the casting and diminishing wall thickness.
SOLUTION
Pre-abrasive blast and machine datum points to ensure reference points remain for post machining, sealing ring & shaft lands. Needle gun/scabble graphitised material prior to Hot Wash and abrasive blast cycle to reduce soluble salts to an acceptable level.
SCOPE
Mask up critical dimensions
Abrasive blast to AS 1627.4 Class 3
Application of RB 332 to the internals including flange, rebates and shaft landing areas
Reinforce casting using Composite repair techniques to reinstate original strength
External coating application to System A which includes the application of RL 500PF @ 300um
Application of RC 500GTC Jade Green
Packaging and protection for transport
PRODUCTS
Chem-tect™ RB 332, glass flake filled vinyl ester
RC 200 Anti Foul, copper pigmented polyester resin
Externals: Epo-chem™ RL 500PF a surface/wet tolerant zinc rich epoxy
OUTCOME
Refurbishing the Hicks Hargraves Strainer saved the company up to $150,000. RB 332 will provide long term protection coupled with the non-toxic anti-foul coating will prevent marine growth for a minimum of 5 years.
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