Wärtsilä Inert Gas Generators for Gas Carriers
Wärtsilä Inert Gas Generators for Gas Carriers Our inert gas generator system, specialised for Gas Carriers, ensures the correct atmosphere in the cargo tanks and pipes to minimize the risk of explosion. The system offers a high level of safety and is designed based on compact modules, offering important savings in space and installation costs for both newbuildings and retrofitting existing vessels. Our most recent developments include higher capacity Wärtsilä Moss inert gas generator systems for new and larger LNG carriers requiring dry inert gas on-board, plus a combined inert gas system and gas combustion unit (GCU). Our newly developed integrated solution eliminates the need for a separate GCU and a safe and reliable gas combustion mode is implemented using the same equipment as the Wärtsilä Moss inert gas generator system. Download Wärtsilä Inert Gas Generators for Gas Carriers leaflet
Components & Design
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Technical Data
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Common failures & inspection points
Visual inspection through man-holes for sludging, corrosion damage, deposits; check nozzles, cooling tubes, floats, sensors, demister elements. Inspection frequency 6-12 months (doubled under critical conditions). Drydock entrance inspectable (scrubber discharge line).
Periodic test & cleaning of inert gas sample line to O₂ analyser (critical service position). Analyser itself: 2-point calibration (Zero-Gas N₂ 0%, Span-Gas known O₂ concentration) before operation. Calibration accuracy per manufacturer. Alarm setting: >8% O₂ volume.
Check water supply (min. 2 separate pumps required). Visual inspection water level (equipped with low-level alarm). Inspection PMS interval per manufacturer; special attention during IG system shutdown. Check for blockage/corrosion at openings.
Check flame screens/meshes (replacement per PMS plan). Calibration for required pressure values + test at operating pressure. Liquid-filled breakers: check fluid type & level; check anti-freeze additive in case of frost risk. Labelling with opening pressures & fluid type/concentration + min. operating temperature.
Ventil zur Inspection öffnen. Prüfung auf Korrosion, Ventilsitz-Zustand, freie Ventilbewegung über volle Hublänge. Betriebsprobe im Service durchführen. Mindestens zwei Rückschlagvorrichtungen erforderlich (Deck Seal + Isolierventil). Kritisch für Hydrokarbon-Rückfluss-Verhinderung in Maschinenraum.
Access to combustion chamber via hinged front (tool-free accessible — check for wear). Flue gas & recirculation valves regularly stroked (stroke test) when system out of service — ensure free operation over full stroke range. Inspection frequency per operating frequency.
Type-general inspection and maintenance points for this equipment category — not model-specific.
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