OVERVIEW: New 316L pipe failed after just two months in operation, causing a total plant shut down.
Quick response by Chemcote restored production without having to fabricate new pipes.
INDUSTRY
ENVIRONMENT
Ambient temperature seawater
SUBSTRATE
Forged 316L SS elbow & pipe section
CHALLENGE
Pitting corrosion in new stainless steel pipes caused holes straight through the steel. Plant unable to operate without these pipes. An immediate and long term solution was required.
SOLUTION
Pipes were removed from service.
Machine rebates to allow coating application onto flange face preventing crevice corrosion.
Apply low MVT (moisture vapour transmission) rated coating, in this case, a glass flake-filled vinyl ester Chem-tect™ RB 364 up to 1,000µm dry film thickness
Reprofile deep pitting holes using composite repair techniques
Reinforce pitted areas and internal lining with basalt fibre weave matting
PRODUCTS
Internals: Chem-tect™ RB 364
Externals: Basalt fibre composite wrap
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