Inert Gas Generator
critical
Known Models (3)
Alfa Laval (Sweden) Smit Inert Gas System (Flue Gas Type)
5,000-100,000 m³/h IG
· Inert Gas (from boiler flue gas)
Voltage: 380-440V
type: Flue Gas Type Inert Gas System
size_range: ['FGIG-5000', 'FGIG-20000', 'FGIG-50000', 'FGIG-100000']
variant_count_approx: 4
period_start_year: 1970
period_end_year: None
drive_type: Passive (boiler flue gas) + Blower
construction: Flue gas take-off from boiler, scrubber, cooler, demister, blower
Common Failures:
- • Scrubber tower corrosion
- • Deck seal water level failure — CRITICAL explosion risk
- • O2 analyzer drift
- • Blower bearing failure
- • Non-return valve failure causing cargo gas backflow
Service: O2 analyzer calibration before each operation. Deck seal water level check every watch. Scrubber inspection annually. Non-return valve test quarterly.
Spares: Alfa Laval (ehem. Smit Gas). Lead time: 3-6 weeks.
Kangrim Heavy Industries (South Korea) Inert Gas Generator
2,000-30,000 m³/h IG
· Inert Gas
Voltage: 380-440V
type: Inert Gas Generator (Combustion Type)
size_range: ['KIG-2000', 'KIG-5000', 'KIG-10000', 'KIG-30000']
variant_count_approx: 4
period_start_year: 1985
period_end_year: None
drive_type: Oil-Fired Combustion
construction: Combustion chamber, scrubber, demister, blower
Common Failures:
- • Same as Wärtsilä/Hamworthy — scrubber corrosion, refractory, O2 analyzer drift
Service: Standard IGG maintenance per Kangrim manual.
Spares: Kangrim (Changwon, Korea). Lead time: 3-6 weeks.
Wärtsilä / Hamworthy (Finland/UK) Inert Gas Generator (IGG)
2,000-50,000 m³/h IG
· Inert Gas (N2-rich flue gas, <5% O2)
Voltage: 380-440V 3ph
type: Inert Gas Generator (Combustion Type)
size_range: ['IGG-2000', 'IGG-5000', 'IGG-10000', 'IGG-25000', 'IGG-50000']
variant_count_approx: 5
period_start_year: 1975
period_end_year: None
drive_type: Oil-Fired Combustion
construction: Combustion chamber, scrubber tower, demister, blower, O2 analyzer
Common Failures:
- • Scrubber tower internal corrosion from hot acidic gases
- • Combustion chamber refractory deterioration
- • O2 analyzer calibration drift — CRITICAL safety parameter
- • Blower bearing failure
- • Demister pad clogging/deterioration
- • Scrubber seawater spray nozzle erosion
Service: O2 analyzer calibration before each tank operation. Scrubber inspection annually. Refractory inspection at drydock. Demister pad replacement every 2-3 years. Blower maintenance quarterly.
Spares: Wärtsilä/Hamworthy Gas Systems. Lead time: 3-6 weeks. O2 analyzer sensors: keep onboard.