⚠ METHANE SLIP ALERT — HIGH CH₄ EMISSIONS — CHECK ENGINE MODE / FUEL VALVE TRAIN ⚠
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)
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
FUEL PIPELINES — P&ID
PIPELINE LINE-UP (DBB VALVE SYSTEM)
BUNKERING MANIFOLD — SHIP-TO-SHORE / SHIP-TO-SHIP CONNECTION
MANIFOLD CONTROLS
LNG FUEL STORAGE TANK — TYPE C / VACUUM-INSULATED
PUMP & TANK CONTROLS
TEMPERATURE MONITORING — TANK & CRYOGENIC PIPEWORK
FIXED CH₄ GAS DETECTION SYSTEM — % LEL
DETECTOR CONTROLS
PORTABLE GAS DETECTION INSTRUMENTS
LNG VAPORISER — FORCED CIRCULATION HEATER
VAPORISER CONTROLS
RELIQUEFACTION PLANT — BOG MANAGEMENT UNIT
RELIQ CONTROLS
GAS VALVE UNIT (GVU) — FUEL SUPPLY TO ENGINE
GVU CONTROLS
NITROGEN GENERATION & SUPPLY
N₂ CONTROLS
NITROGEN DISTRIBUTION — INERTING, PURGING & PRESSURISATION
SHORE / SUPPLY PIPELINES
SHORE PIPELINE CONTROLS
SHORE LNG STORAGE TANK
SHORE EQUIPMENT OVERVIEW
EQUIPMENT CONTROLS

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