LPG Fuel Gas Supply System

LPG FUEL SYSTEM

LPG Composition

C₃H₈ 60% / C₄H₁₀ 40%

LEL: C₃H₈ 2.1% · C₄H₁₀ 1.8%

Valve Status (per §5.3 MSC.1/Circ.1666)

Propulsion Mode

DUAL-FUEL / LPG ACTIVE

Engine Load

71.8 %

P&ID SCHEMATIC — LPG FUEL GAS SUPPLY SYSTEM (MSC.1/Circ.1666)

FIRE & GAS / ALARM MANAGEMENT

ESD → MFV close + vaporiser trip + engine → diesel

GAS DETECTION — % LEL (C₃H₈ LEL = 2.1% · FLOOR LEVEL)

SCENARIO / TREND

NORMAL OPERATIONS

LPG fuel system steady state. Pressurised storage ~8 bar. No BOG issue. LPG heavier than air — sinks to bilge.

LPG PROPERTIES / SAFETY

Critical: LPG heavier than air

LPG sinks — accumulates in bilges, pits, enclosed low spaces. Detectors at FLOOR LEVEL.

Detector Positions (per MSC.1/Circ.1666)

Ventilation (min 30 ACH fuel prep)

NORMAL — 30 ACH

PPE Status

SCBA SETS

4/4

READY

FIRE SUITS

4/4

READY

FUEL PIPELINES — P&ID · VALVE TRAIN

PIPELINE LINE-UP

BUNKERING MANIFOLD — SHIP-TO-SHORE CONNECTION

MANIFOLD CONTROLS

LPG FUEL STORAGE TANK — PRESSURISED TYPE C · ~8 BAR

PUMP & TANK CONTROLS

TEMPERATURE MONITORING — TANK & PIPELINE

FIXED LPG GAS DETECTION SYSTEM — % LEL · FLOOR-LEVEL DETECTORS

DETECTOR CONTROLS

PORTABLE GAS DETECTION INSTRUMENTS

LPG VAPORISER — LIQUID-TO-GAS CONVERSION UNIT

VAPORISER CONTROLS

RELIQUEFACTION PLANT — BOG MANAGEMENT

RELIQ CONTROLS

NITROGEN GENERATION & SUPPLY

N₂ CONTROLS

NITROGEN DISTRIBUTION — PRESSURISATION & PURGE

SHORE / SUPPLY PIPELINES

SHORE CONTROLS

SHORE LPG STORAGE TANK

SHORE EQUIPMENT OVERVIEW

EQUIPMENT CONTROLS