LNG FUEL SYSTEM
BOG Management (per IGF §7)
BOIL-OFF GAS (BOG)
0.12 %/day
BOG used as fuel / reliquefied
Reliquefaction Unit
ONLINE — 68% DUTY
Valve Status (IGF Code §6)
NON-RETURN VALVES
Detailed Pipeline Line-Up (IGF Code §6)
GVU — Gas Valve Unit
NORMAL — PILOT VALVE OK
Engine Mode
DF-GAS MODE — LNG ACTIVE
Engine Load
74.2 %
P&ID — LNG FUEL SYSTEM (IGF Code Part A-1)
FIRE & GAS / AMS
ESD closes MFV + GVU · Engine trips to diesel
GAS DETECTION — % LEL CH₄ (LEL = 5% vol)
SCENARIO / TREND
NORMAL OPERATIONS
LNG fuel system steady state. Tank −162°C. BOG consumed by engine or reliquefied. Methane slip monitoring active per MAMII.
CRYOGENIC SAFETY / METHANE SLIP
Methane Slip Monitor (GWP ×25 CO₂)
0.4
g/kWh methane slip
Target: < 2 g/kWh · IMO FuelEU 2025
Cryogenic Hazard Zones
Cold-burn PPE
Cryo gloves
4/4
Face shield
4/4
Ventilation (min 30 ACH GVU room)
NORMAL — 30 ACH