OVERVIEW: Steel Sea Water pipe spools had a failed concrete lining and required a quick turnaround and long term corrosion protection.
Working around the clock, we coated the spools with a robust glass flake filled vinyl ester and non toxic anti foul copper based epoxy to prevent marine growth.
INDUSTRY
ENVIRONMENT
Sea Water
SUBSTRATE
Steel with failed concrete lining
CHALLENGE
A short time frame requiring quick turnaround. Pipe spools required long term corrosion protection
SOLUTION
Working around the clock, preparing surfaces and coating pipe spools with RB 300 series, a robust glass flake filled vinyl ester and top coating with a non toxic anti foul copper based epoxy preventing marine growth
SCOPE
Grind welds and sharp edges
Grind rebate to all flange faces to prevent crevice corrosion caused by misaligned gaskets
Abrasive blast to Class 3 AS 1627.4 75 micron profile (nominal)
Apply of 2 coats of RB 300 to a DFT of 1200 microns and 1 coat polymer copper
Carry out QA including holiday test @ 8kV and confirm thickness
Externals protected with 2 coats of RL 500PF and topcoat PU
OUTCOME
An extremely fast turnaround and cure time meant that the pipe spool was back in production quickly (in this case, 3 days). With Chemcote’s protective coatings, the pipe is expected to exceed life requirement of 25 years as well as reduce maintenance cost in the future. No fouling of internals from marine growth for many years to come.
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