54653358 Fire Gas Detection Philosophy Rev1 Full

8/2/2019 54653358 Fire Gas Detection Philosophy Rev1 Full

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Arthit Platform



Type of Fire & Gas (F&G) detectors

Installation

Voting philosophy

Automatic action by SIS (Safety Instrumented System) Automatic action by Addressable Fire Panel (For

ALQB)

F&G in Turbo Machinery Packages

Deluge System

Fire Water Pumps



Flame Detector Fusible Plug Loop

Gas Detector (Point Type)

Gas Detector (Line of Sight) VESDA (Very Early Smoke Detection Apparatus)

Smoke Detector

Heat Detector

Emergency Shutdown Pushbutton Manual Alarm Call point

Special







Multi spectrum IR Flame Detector

Installation All decks on APP

Field of View Distance 30 m.

90 degree horizontal

75 degree vertical



One flame detector – alarm only

At least two flame detector in same fire zone Activate ESD1 on APP

Activate deluge valve in that fire zone Start fire water pumps

PAGA tone 2



2oo27 Voting of flame detectors



2oo2 Voting of flame detectors

Special Action Inhibit FWPs on APP to start Deluge valve NOT activated (no deluge in this fire zone)





Fusible plugs are fixed temperature heat detectors thatmelt at the required temperature.

Fire detection is due to loss of air/gas pressure in thefusible plug loop.

Melt point is 203 DegF (95 DegC) on AWPs

Melt point is 160 DegF (71 DegC) on APP



Fusible plug melt on APP Activate deluge valve in that fire zone Start fire water pumps (due to fire water ring main pressure

low)

Fusible plug melt on AWP1 Activate ESD1 on AWP1 Activate deluge valve to AWP1 Start fire water pumps (due to fire water ring main pressure

low)

Fusible plug melt on AWPs Activate ESD1 on AWPs



Special Fusible plugs were provided at each riser valve to directly

close the valves when exposed to a fire.









The Deluge system is designed to protect high hazardareas containing a severe fuel hazard with a high heatrelease rate by bringing a large number of opensprayers into action simultaneously in the event of a

fire.



P&ID



5 Deluge valve for APP 2 for lower deck – always open together

XV-5650 and XV-5660

2 for main deck – always open together XV-5670 and XV-5680

1 for upper deck XV-5690

1 Deluge valve for AWP1 XV-5640



How many ways to activate deluge? Fusible plug melt

SIS energize solenoid when confirm fire

Manually press hand switch at local

Manually press push button in CCR



Special Manually press deluge push button in CCR will;

Activate ESD1 on APP

Start fire water pumps

PAGA tone 2

Note: for AWP1 will be activate ESD1 on AWP1 only





The Fire Water Manifold is pressurized at 10 barg by utility waterpumps. When the pressure drops to 6.5 barg or ConfirmedFire/Gas the first Fire Water Pump in the preset start sequencestarts. If the manifold pressure do not build to 10 barg in 30seconds, the second pump starts. If the manifold pressure still

does not reach 10 barg in another 30 seconds, the third pumpstarts. If 1st FW pump start and build pressure to 10 barg within 30s. 2nd

FW pump will not start But if the pressure drop below 10 barg after 30s. 2nd pump will start.

After 2nd pump start, if pressure drop below 10 barg, 3rd pump willstart. (With 30 seconds delay after 2nd pump started)

This logic is to prevent FW pumps start consecutively within 30seconds







Infrared Hydrocarbon Gas Detector


Theory of Operation Certain IR wavelengths are absorbed by the gas







Infrared Hydrocarbon Gas Detector Transmitter

Transmitter produces an intense, collimated infrared beam which is produced by a Xenon arc flash lamp.

Receiver Receiver collects infrared radiation from the transmitter and

performs measurements to enable hydrocarbon gases in thebeam path to be detected.


Theory of Operation Certain IR wavelengths are absorbed by the gas



One gas detector more than 20% LEL – alarm only

In process area (within same fire zone) One gas detector more than 20% LEL

And

One gas detector more than 60% LEL Activate ESD1


PAGA tone 2



Inlet enclosure of turbo machinery (within same firezone) Two gas detector more than 40% LEL (2ooN)

Activate ESD1

Start fire water pumps PAGA tone 2

Isolate essential power to turbo machinery package



In HVAC air inlet LER, SWR (within same fire zone) Two gas detectors more than 40% LEL (2ooN)

Activate ESD1


PAGA tone 2 Trip HVAC, close fire dampers



In LER, SWR (within same fire zone) Two gas detectors more than 40% LEL (2ooN)

Activate ESD1


PAGA tone 2 Trip HVAC, close fire dampers

Isolate battery of UPS and Battery Charger. (10 s delay) This will lead to black-out. SIS loss power. EDG can not start.

Gas detector in airlock is alarm only



AQP Main deck One gas detector more than 20% LEL

And

One gas detector more than 60% LEL Activate ESD1 Inhibit AQP fire water pump to start

Start fire water pumps on APP

PAGA tone 2

Stop/Inhibit to start EDG Trip AQP HVAC



AQP HVAC air inlet Two gas detectors more than 40% LEL (2ooN)

Activate ESD1

Inhibit AQP fire water pump to start

Start fire water pumps on APP PAGA tone 2

Stop/Inhibit to start EDG

Trip AQP HVAC

Isolate battery of AQP All HMI in CCR will power loss



ALQB HVAC air inlet Two gas detectors more than 40% LEL (2ooN)

Activate ESD1


PAGA tone 2 Trip ALQB HVAC

Trip ALQB UPS and essential power





Turbo machinery package has “Eagle Quantum”controller as independent F&G system

No detectors voting

No ESD1



Feed gas compressors Confirm fire by heat detector Confirm fire by flame detector (3s delay in “eagle quantum”

for confirmation) Shutdown FGC (with blowdown) Release CO2 for package

Release “main” CO2 then wait for 90 seconds. If fire still active, willrelease “reserve” CO2


Isolate all power to package Gas alarm at 5% LEL Confirm gas at 10% LEL

Same action as above except no CO2 release



Sale gas compressors Confirm fire by heat detector Confirm fire by flame detector (5s delay in “flame

detector” for confirmation)

Shutdown SGC (with blowdown) Release CO2 for package

Release “primary” and “extended”


Isolate all power package Gas alarm at 20% LEL Confirm gas at 40% LEL




Power Generators Confirm fire by heat detector Confirm fire by flame detector (5s delay in “flame

detector” for confirmation)

Shutdown power generator Release CO2 for package

Release “primary” and “extended”


Isolate all power package Gas alarm at 20% LEL Confirm gas at 40% LEL










Very Early Smoke Detection Apparatus Work by continually drawing air into the pipe network. The sample

enter to laser detection chamber for smoke detection

Installation APP LER, APP SWR, APP ESWR, AQP SWR

Action When fire alert Alarm in CCR Operator have to investigate the root cause of smoke and try to stop it

When confirm fire Start fire water pumps

Trip HVAC units and close fire dampers. Isolate normal and essential lighting PAGA tone2

Note: There is no ESD1 in this case.





Manual Alarm Call point Located around the facility to allow personnel to raise

an alarm.

Alarm in CCR only.

Panel operator will take necessary action.





Located principally near main stairways on mainprocess decks.

Action - Activate ESD1 Close all shutdown valves

Open all blowdown valves

Trip all packages

ESD2 on all wellhead platforms

Start Fire Water Pumps

PAGA tone2

Trip normal power (Main Generators) EDG will start automatically





Located at Helideck Access Landing Lifeboat embarkation area Drain Deck

Action – Activate ESD0 ESD1 ESD1 on all wellhead platforms Stop EDG PAGA tone1 Isolate Battery charger on AQP Delay 30 minutes to isolate UPS on AQP Delay 3 hours to isolate UPS and Battery charger on APP





Located at In front of LER

In front of ESWR

In front of CCR

This PB is use for isolate power in the room in case of

fire.



LER and ESWR Activate ESD1

Stop/Inhibit to start EDG

Isolate APP battery charger

120 seconds delay to isolate APP UPS

This will lead to black-out. SIS loss power.



CCR Activate ESD1

Isolate AQP battery charger and UPS

All HMI in CCR will loss power







Photoelectric sensing detect visible fire particles Located in AQP Workshop, CCR, Raised floors,

Laboratory, Battery room

Action Confirm smoke in Laboratory (1oo1)

PAGA tone 2

Trip HVAC units and close fire dampers.

Isolate all power sources within the laboratory




Action Confirm smoke in APP battery room (2oo2)

PAGA tone 2

Close fire dampers.

Start fire water pumps Confirm smoke in AQP battery room (1oo1)

PAGA tone 2

Trip AQP HVAC




Action Confirm smoke in AQP workshop (2ooN in same fire

zone) PAGA tone 2

Trip AQP HVAC and close fire dampers. Isolate all power sources within fire zone






The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner strutsare made of a lower expanding alloy. Designed to resist thermalenergy absorption and sealed inside the shell, the struts followtemperature changes more slowly.

Designed to activate at a fixed temperature, regardless of the rate of temperature rise.

Set point is 60 DegC.



They will be used as the primary means of firedetection in areas where smoke is regularly expectedand accepted (Welding workshop, mechanical

workshops, EI workshop).

Action Confirm heat in one fire zone (1ooN)

PAGA tone 2

Trip HVAC units and close fire dampers.

Isolate all power sources within fire zone Start fire water pumps









Autronica AutroSafe on ALQB Automatic addressing of detectors.

Self-Verify Function for automatic testing of detectors

The system operates on the new AUTROLON

communication bus, enabling networking of all panels,detectors and interfaces to easily form a complex,distributed and totally interactive system - giving theflexibility to adapt to the individual requirements of any

site.



Smoke Detector (optical type) installed in every cabins,offices, recreation area

MAC installed in around the building to allow personnelto raise an alarm

Heat Detector install in galley VESDA installed in TER

Flame detectors at Helideck

Addressable interface unit installed on every floors

Addressable control panel is in CCR



Action Confirm fire inside ALQB

Alarm in CCR with tag and location of fire.

Close fire dampers

Trip ALQB HVAC Start stairwell pressurize fans

Confirm gas outside ALQB (XS-8600; signal from SIS) Alarm in CCR

Close fire dampers

Trip ALQB HVAC

NOT Start stairwell pressurize fans



Action Confirm fire inside galley

Alarm in CCR with tag and location of fire.

Close fire dampers

Trip ALQB HVAC Start stairwell pressurize fans

Trip galley distribution board (LSB-QP-360)

All ALQB F&G detection will not alarm to PAGA



Please refer to C&E for detail actions for each F&Gdetection

54653358 Fire Gas Detection Philosophy Rev1 Full

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