Scrubber risks: Lessons from six years of claims

With nearly 7,000 vessels now utilizing Exhaust Gas Cleaning Systems (EGCS) to meet global sulfur emission standards, the maritime industry faces a critical juncture regarding long-term reliability. Recent data from Gard highlights a six-year trend of recurring technical failures, specifically citing corrosion, fire hazards, and flooding incidents linked to scrubber installations. As adoption rates climb, shipowners and technical superintendents must address these systemic vulnerabilities to ensure the ongoing safety and operational integrity of the global merchant fleet.

The operational challenges surrounding scrubbers are deeply rooted in compliance with MARPOL Annex VI, which mandates strict sulfur emission limits for marine fuels. Under the International Maritime Organization (IMO) framework, vessels must demonstrate continuous performance monitoring to avoid detention during Port State Control inspections. Furthermore, adherence to SOLAS Chapter II-2 regarding fire protection remains paramount, as scrubber-related corrosion can compromise structural fire integrity. Classification societies now emphasize rigorous inspection intervals and material quality standards to mitigate the risks of acid-induced degradation in exhaust piping and overboard discharge systems.

Chief engineers and second engineers must prioritize proactive maintenance and regular inspections of scrubber wash-water systems to prevent catastrophic failure. These technical officers should focus on monitoring pH levels and detecting early signs of corrosion in overboard pipes. By conducting frequent, detailed checks of the EGCS monitoring equipment and emergency shut-off valves, engineering teams can significantly reduce the risk of flooding and fire, ensuring the vessel remains compliant and seaworthy throughout its operational lifecycle.