Wärtsilä Repair & Overhaul
Wärtsilä Scrubber Overboard Repairs
In-situ underwater repairs of scrubber discharge (overboard) pipes and hull corrosion by diver technicians, including patented pipe-in-pipe and stainless steel insert solutions.
Description
Wärtsilä Underwater Services Scrubber Overboard Repairs fix and prevent corrosion caused by acidic wash water discharged from exhaust gas scrubbers, which can damage mild-steel overboard piping and nearby hull plating and lead to leaks into cargo spaces, engine room, ballast tanks and voids. Many repairs are carried out in-situ by a global network of factory-trained, industry-certified diver technicians, avoiding dry-docking.
Underwater projects can be completed in as little as two days, and repairs can cost up to three times less than dry-docking. The methods also apply to damage from EGR wash water and ballast water treatment substances.
Repair solutions
- Patented pipe-in-pipe: acid-resistant GRE pipe fixed inside the mild steel pipe; developed with Maersk and exclusive to Wärtsilä; best for large systems as a long-term solution
- Prefabricated stainless steel inserts: patented solution suitable for most scrubbers, fitted underwater using a cofferdam
- Replacement pipe and coating: new mild steel spool piece welded into the hull, with old coating removed and corrosion-resistant coating applied
- Laser-cladded mild steel piping: new mild steel pipe protected with a laser-cladded cover
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