CO₂ Fixed Fire Suppression

SYSTEM CONTROL

Zone Select

Operating Mode

Discharge Control

Boundary Dampers

D-01 OPEN

D-02 OPEN

D-03 OPEN

D-04 OPEN

D-05 OPEN

D-06 OPEN

CO₂ SYSTEM SCHEMATIC — P&ID

SYSTEM STATUS & ALARMS

0.04%

v/v Design: 40%

System Pressure57.4 bar

Cylinders Charged72

Cylinders Dischrg0

VentilationRUNNING

Dampers Closed0/6

Delay Counter--

W System awaiting scenario --:--

EVACUATION CHECKLIST

All items must be completed before CO₂ release is authorised.

Personnel count confirmed — all clear of protected space

Pre-alarm horn sounded — minimum 20 seconds

All ventilation fans stopped

All 6 boundary dampers confirmed CLOSED

Fuel oil quick-closing valves confirmed shut

Bridge / duty officer notified

CO₂ room door confirmed accessible for abort

0/7 items complete — discharge LOCKED

EVENT LOG

-- CO₂ system log initialised --

SYSTEM PARAMETERS

Cylinder Pressure57.4bar

Reserve Pressure56.8bar

CO₂ Concentration0.04% v/v

Cylinders Remaining72/ 72

Protected Space: Engine Room

Required Qty: 1,680 kg (37 cyl)

Design Conc: 40% v/v (34% min)

Release Time: ≤ 2 min (85%)

Cylinder Mass: 45 kg CO₂ each

Cylinder Press: 55–60 bar @ 21°C

CO₂ SYSTEM — FULL P&ID SCHEMATIC

LINE IDENTIFICATION

MAIN HEADER

MH-001 Main CO₂ HeaderCHARGED

MH-002 Pilot LineARMED

MH-003 Release ManifoldSTANDBY

ZONE VALVES

ZV-ER Engine RoomOPEN

ZV-CPR Cargo Pump RoomCLOSED

PRESSURE INDICATORS

PI-001 System Header57.4 bar

PI-002 Reserve Bank56.8 bar

PI-003 ER Nozzle Inlet0.0 bar

PI-004 CPR Nozzle Inlet0.0 bar

CO₂ BOTTLE ROOM — CYLINDER BANK OVERVIEW

CYLINDER STATUS

MAIN BANK — 72 CYLINDERS

Cylinders Charged72 / 72

Cylinders Discharged0

Bank Pressure (avg)57.4 bar

Temperature21°C

RESERVE BANK — 18 CYLINDERS

Reserve Charged18 / 18

Reserve Pressure56.8 bar

Isolation ValveCLOSED

LOW PRESSURE ALARMS

Warning Level52 bar

Alarm Level48 bar

LP Switch StatusHEALTHY

INSPECTION

Last Weighing2025-01 DOC

Next Due2027-01

Hydro Test Due2030-01

CO₂ DISTRIBUTION PIPEWORK — NOZZLE LAYOUT

NOZZLE & PIPE DATA

ENGINE ROOM — 24 NOZZLES

Upper Zone Nozzles8 × 6mm

Lower Zone Nozzles10 × 8mm

Bilge Nozzles6 × 6mm

Coverage Volume3,850 m³

CARGO PUMP ROOM — 8 NOZZLES

Upper Nozzles4 × 5mm

Lower Nozzles4 × 5mm

Coverage Volume820 m³

PIPE SCHEDULE

Main HeaderDN100 Sch.40

Zone BranchDN65 Sch.40

DistributionDN40 Sch.40

Nozzle DropDN20 Sch.80

PILOT CYLINDER SYSTEM — ACTUATION CONTROL

PILOT CYLINDER STATUS

PILOT CYLINDERS (2 OFF)

Pilot Cyl. No.1ARMED

Pilot Cyl. No.2 (backup)ARMED

Pilot Pressure59.1 bar

ACTUATION MODES

Auto ReleaseENABLED

Manual Pull BoxCO₂ ROOM

Remote ReleaseBRIDGE

SOLENOID VALVES

SOL-01 Auto ReleaseDE-ENERGISED

SOL-02 Pilot ActuationDE-ENERGISED

PULL-BOX STATUS

Pull-Box No.1 (CO₂ Rm)SEALED

Pull-Box No.2 (Deck)SEALED

FIRE DETECTION — ENGINE ROOM & PUMP ROOM

DETECTOR STATUS

ENGINE ROOM — SMOKE DETECTORS

SD-ER-01 Upper FwdNORMAL

SD-ER-02 Upper AftNORMAL

SD-ER-03 Mid LevelNORMAL

SD-ER-04 Lower FwdNORMAL

SD-ER-05 Lower AftNORMAL

ENGINE ROOM — HEAT DETECTORS

HD-ER-01 Purifier AreaNORMAL

HD-ER-02 Booster PumpNORMAL

HD-ER-03 IncineratorNORMAL

CARGO PUMP ROOM

SD-CPR-01 UpperNORMAL

SD-CPR-02 LowerNORMAL

HD-CPR-01 Pump AreaNORMAL

DETECTION PANEL

FDAS Loop 1HEALTHY

FDAS Loop 2HEALTHY

Battery Backup30 hr CHARGED

VENTILATION & BOUNDARY DAMPER SYSTEM

VENTILATION CONTROLS

SUPPLY FANS

SF-01 ER Main SupplyRUNNING

SF-02 ER Aux SupplyRUNNING

SF-03 CPR SupplyRUNNING

EXHAUST FANS

EF-01 ER Main ExhaustRUNNING

EF-02 ER Aux ExhaustRUNNING

EF-03 CPR ExhaustRUNNING

BOUNDARY DAMPERS (6 OFF)

D-01 ER Upper FwdOPEN

D-02 ER Upper MidOPEN

D-03 ER Upper AftOPEN

D-04 ER Lower FwdOPEN

D-05 ER Lower AftOPEN

D-06 CPR DamperOPEN

ZONE SELECTOR VALVE ARRANGEMENT

ZONE SELECTOR CONTROLS

ZONE SELECTOR BLOCK

Selected ZoneENGINE ROOM

Selector PositionER

ZONE VALVES

ZV-ER StatusOPEN

ZV-CPR StatusCLOSED

Interlock ActiveYES

SELECT ZONE

Per FSS Code Ch.5 §4.1 — zone selector valve must be positioned before discharge. Only one zone can be selected at a time.

DISCHARGE SEQUENCE — STEP-BY-STEP PROCEDURE

STEP 1 — PRE-ALARM

1Activate pre-alarm — audible/visual warning throughout protected space. Minimum 20 seconds per SOLAS.

Confirm all personnel have evacuated protected space.

STEP 2 — VENTILATION STOP

2Stop all supply and exhaust ventilation fans serving the protected space.

Confirm fan stopped status on VFD / MCC panel.

STEP 3 — DAMPER CLOSURE

3Close all 6 boundary dampers — confirm closed indication on each.

Confirm 6/6 dampers closed on status panel.

STEP 4 — 20-SECOND DELAY

420-second abort window begins. Abort available until counter expires.

Delay counter: --

STEP 5 — CO₂ RELEASE

5CO₂ pilot cylinders actuated — zone valve opens — main bank discharges.

CO₂ concentration: 0.04% v/v

SEQUENCE CONTROLS

SEQUENCE STATUS

SYSTEM READY — SELECT ZONE AND INITIATE

PRE-DISCHARGE SAFETY CHECKLIST

All items must be completed and confirmed before CO₂ discharge is authorised. Per FSS Code Ch.5 and SMS Fire Fighting Plan.

PERSONNEL SAFETY

All personnel accounted for — protected space clear

SOLAS II-2/Reg.17.4 · FSS Code Ch.5 §3

Personnel on boundary watch assigned

SMS Fire Fighting Plan §7.2

SCBA sets confirmed available for re-entry team

FSS Code Ch.5 §3.1.4

SPACE ISOLATION

Pre-alarm sounded — minimum 20-second evacuation warning

SOLAS II-2/Reg.10.7.1 · FSS Code Ch.5 §4.3

All ventilation fans stopped and confirmed

FSS Code Ch.5 §4.2 — fans must stop before release

All 6 boundary dampers confirmed CLOSED — visual check

FSS Code Ch.5 §4.2 — dampers confirmed by indicator lights

All access doors to protected space closed and clipped

FSS Code Ch.5 §4.2.3

MACHINERY ISOLATION

Fuel oil quick-closing valves confirmed shut

SOLAS II-2/Reg.17 — fuel isolation before CO₂ release

Main engine and generators stopped if safe to do so

FSS Code Ch.5 §3.4 — CO₂ is non-conducting, safe for live equipment

Emergency power source confirmed available (EDG)

SOLAS II-1/Reg.43 — emergency power during flooding

NOTIFICATIONS

Bridge / Officer of the Watch notified

SMS Fire Fighting Plan §4.1

CO₂ room door accessible — abort pull-box unobstructed

FSS Code Ch.5 §4.3.3 — abort available during 20s delay

0/12 items confirmed — discharge LOCKED

REGULATORY REFERENCE

SOLAS REQUIREMENTS

II-2/Reg.10 — Fire-extinguishing systems

II-2/Reg.17 — Fuel isolation before flooding

II-2/Reg.19 — Crew training requirements

FSS CODE

Ch.5 §3 — System design requirements

Ch.5 §4 — Operating procedures

Ch.5 §4.2 — Ventilation and dampers

Ch.5 §4.3 — Discharge sequence

IACS UR F15

Cylinder quantity calculation

Pipe sizing and nozzle design

Low-pressure alarm requirement

Annual inspection and weighing

CO₂ HAZARD DATA

IDLH: 40,000 ppm (4% v/v)

Extinguishing conc: 34% v/v min

Design conc: 40% v/v

Re-entry: SCBA mandatory

TREND DISPLAY — SYSTEM PARAMETERS

TREND SELECTION

ACTIVE TRENDS

CO₂ Concentration 0.04% v/v

System Pressure 57.4 bar

Reserve Pressure 56.8 bar

Cylinders Remaining 72

TIME BASE

PEAK VALUES

Peak CO₂ Conc0.04%

Min Sys Pressure57.4 bar

Max Cylinders Disch0

Screen Too Small