MPUSOx/U-2400 installed oboard WEC VAN EYCK (IMO 9365984)

Common issues

• SO2/CO2 ratio analyser drift causing false compliance alarms
• Spray nozzle blockage or erosion reducing washwater distribution and scrubbing efficiency
• Rising differential pressure across the scrubber tower/demister from scale or deposit build-up
• Washwater pH control instability, especially in open-loop mode with variable seawater alkalinity
• Discharge water monitoring (PAH, turbidity, nitrate) sensor fouling giving unreliable readings
• Corrosion of tower internals and ducting, particularly in way of washwater impingement
• Bypass damper leakage or failure to open on EGCS fault, risking non-compliant exhaust
• Hybrid unit's caustic soda (NaOH) dosing system faults in closed-loop mode

Inspection checklist

• Verify current calibration certificate for SO2/CO2 continuous monitoring equipment
• Review EGCS record book and exceedance log for unexplained gaps or repeated alarms
• Inspect scrubber tower and ducting internally for corrosion and coating condition at dry-dock
• Check spray nozzles for blockage, erosion or uneven pattern
• Verify washwater discharge quality monitoring against MEPC.259(68) limits
• Test bypass/exhaust gas bypass damper operation and fail-safe position
• Check demister pad condition and differential pressure trend
• Confirm EGCS Technical Manual on board matches the installed configuration

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• SO2/CO2 analyser sample cell/sensor module
• Spray nozzles (full set for one bank)
• Demister pad sections
• pH/ORP probes
• Washwater discharge/bypass valve actuator seals
• Sample line filters

Safety

• Acidic washwater handling and skin/eye contact during sampling or maintenance
• Confined space entry into the scrubber tower - test and ventilate before entry
• Hot exhaust gas ducting surfaces
• Caustic soda (NaOH) handling on closed-loop/hybrid units
• Electrical hazards at analyser cabinets located in exposed or humid spaces

Class survey

EGCS is a Continuous Survey Machinery item under MEPC.259(68) Scheme B. Class/flag state review the SO2/CO2 exceedance log, washwater discharge records, and confirm the EGCS Technical Manual matches the as-installed system before renewing the IAPP certificate endorsement.