Download - Fire & Gas Detection Philosophy Rev1 - Full
Arthit Platform
Fire & Gas Detection Philosophy
Type of Fire & Gas (F&G) detectorsInstallationVoting philosophyAutomatic action by SIS (Safety Instrumented
System)Automatic action by Addressable Fire Panel
(For ALQB) F&G in Turbo Machinery PackagesDeluge SystemFire Water Pumps
Content
Flame DetectorFusible Plug LoopGas Detector (Point Type)Gas Detector (Line of Sight)VESDA (Very Early Smoke Detection Apparatus)Smoke DetectorHeat DetectorEmergency Shutdown PushbuttonManual Alarm Call pointSpecial
Type of F&G detectors
Multi spectrum IR Flame DetectorInstallation
All decks on APPField of View
Distance 30 m.90 degree horizontal75 degree vertical
Flame Detector
One flame detector – alarm onlyAt least two flame detector in same fire zone
Activate ESD1 on APPActivate deluge valve in that fire zoneStart fire water pumpsPAGA tone 2
Flame Detector
2oo27 Voting of flame detectors
Flame Detector
2oo2 Voting of flame detectors
Special ActionInhibit FWPs on APP to startDeluge valve NOT activated (no deluge in this fire zone)
Flame Detector
Fusible plugs are fixed temperature heat detectors that melt at the required temperature.
Fire detection is due to loss of air/gas pressure in the fusible plug loop.
Melt point is 203 DegF (95 DegC) on AWPsMelt point is 160 DegF (71 DegC) on APP
Fusible Plug
Fusible plug melt on APPActivate deluge valve in that fire zoneStart fire water pumps (due to fire water ring main
pressure low)
Fusible plug melt on AWP1Activate ESD1 on AWP1Activate deluge valve to AWP1Start fire water pumps (due to fire water ring main
pressure low)
Fusible plug melt on AWPsActivate ESD1 on AWPs
Fusible Plug
SpecialFusible plugs were provided at each riser valve
to directly close the valves when exposed to a fire.
Fusible Plug
The Deluge system is designed to protect high hazard areas containing a severe fuel hazard with a high heat release rate by bringing a large number of open sprayers into action simultaneously in the event of a fire.
Deluge System
P&ID
Deluge System
5 Deluge valve for APP2 for lower deck – always open together
XV-5650 and XV-56602 for main deck – always open together
XV-5670 and XV-56801 for upper deck
XV-5690
1 Deluge valve for AWP1XV-5640
Deluge System
How many ways to activate deluge?Fusible plug meltSIS energize solenoid when confirm fireManually press hand switch at localManually press push button in CCR
Deluge System
SpecialManually press deluge push button in CCR will;
Activate ESD1 on APPStart fire water pumpsPAGA tone 2
Note: for AWP1 will be activate ESD1 on AWP1 only
Deluge System
The Fire Water Manifold is pressurized at 10 barg by utility water pumps. When the pressure drops to 6.5 barg or Confirmed Fire/Gas the first Fire Water Pump in the preset start sequence starts. If the manifold pressure do not build to 10 barg in 30 seconds, the second pump starts. If the manifold pressure still does not reach 10 barg in another 30 seconds, the third pump starts. 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
will start. (With 30 seconds delay after 2nd pump started)This logic is to prevent FW pumps start consecutively within
30 seconds
Fire Water Pumps Start Sequence
Infrared Hydrocarbon Gas DetectorInstallation
All decks on APPTheory of Operation
Certain IR wavelengths are absorbed by the gas
Gas Detector (Point Type)
Infrared Hydrocarbon Gas DetectorTransmitter
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 the beam path to be detected.
InstallationAll decks on APP
Theory of OperationCertain IR wavelengths are absorbed by the gas
Gas Detector (Line of Sight)
One gas detector more than 20% LEL – alarm only
In process area (within same fire zone)One gas detector more than 20% LEL
AndOne gas detector more than 60% LEL
Activate ESD1Start fire water pumpsPAGA tone 2
Gas Detector (Point type + Line of Sight)
Inlet enclosure of turbo machinery (within same fire zone)Two gas detector more than 40% LEL (2ooN)
Activate ESD1Start fire water pumpsPAGA tone 2Isolate essential power to turbo machinery package
Gas Detector (Point type)
In HVAC air inlet LER, SWR (within same fire zone)Two gas detectors more than 40% LEL (2ooN)
Activate ESD1Start fire water pumpsPAGA tone 2Trip HVAC, close fire dampers
Gas Detector (Point type)
In LER, SWR (within same fire zone)Two gas detectors more than 40% LEL (2ooN)
Activate ESD1Start fire water pumpsPAGA tone 2Trip HVAC, close fire dampersIsolate 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
Gas Detector (Point type)
AQP Main deckOne gas detector more than 20% LEL
AndOne gas detector more than 60% LEL
Activate ESD1Inhibit AQP fire water pump to startStart fire water pumps on APPPAGA tone 2Stop/Inhibit to start EDGTrip AQP HVAC
Gas Detector (Line of Sight)
AQP HVAC air inletTwo gas detectors more than 40% LEL (2ooN)
Activate ESD1Inhibit AQP fire water pump to startStart fire water pumps on APPPAGA tone 2Stop/Inhibit to start EDGTrip AQP HVACIsolate battery of AQP
All HMI in CCR will power loss
Gas Detector (Point type)
ALQB HVAC air inletTwo gas detectors more than 40% LEL (2ooN)
Activate ESD1Start fire water pumpsPAGA tone 2Trip ALQB HVACTrip ALQB UPS and essential power
Gas Detector (Point type)
Turbo machinery package has “Eagle Quantum” controller as independent F&G system
No detectors votingNo ESD1
F&G in Turbo Machinery Packages
Feed gas compressorsConfirm fire by heat detectorConfirm 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, will release “reserve” CO2
Start fire water pumpsPAGA tone 2Isolate all power to package
Gas alarm at 5% LELConfirm gas at 10% LEL
Same action as above except no CO2 release
F&G in Turbo Machinery Packages
Sale gas compressorsConfirm fire by heat detectorConfirm fire by flame detector (5s delay in “flame
detector” for confirmation)Shutdown SGC (with blowdown)Release CO2 for package
Release “primary” and “extended”Start fire water pumpsPAGA tone 2Isolate all power package
Gas alarm at 20% LELConfirm gas at 40% LEL
Same action as above except no CO2 release
F&G in Turbo Machinery Packages
Power GeneratorsConfirm fire by heat detectorConfirm fire by flame detector (5s delay in “flame
detector” for confirmation)Shutdown power generator Release CO2 for package
Release “primary” and “extended”Start fire water pumpsPAGA tone 2Isolate all power package
Gas alarm at 20% LELConfirm gas at 40% LEL
Same action as above except no CO2 release
F&G in Turbo Machinery Packages
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 SWRAction
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.
VESDA
Manual Alarm Call pointLocated around the facility to allow personnel
to raise an alarm.Alarm in CCR only. Panel operator will take necessary action.
MAC
Located principally near main stairways on main process decks.
Action - Activate ESD1Close all shutdown valvesOpen all blowdown valvesTrip all packagesESD2 on all wellhead platformsStart Fire Water PumpsPAGA tone2Trip normal power (Main Generators)
EDG will start automatically
ESD1 Push Button
Located atHelideck Access LandingLifeboat embarkation area Drain Deck
Action – Activate ESD0ESD1ESD1 on all wellhead platformsStop EDGPAGA tone1Isolate Battery charger on AQPDelay 30 minutes to isolate UPS on AQPDelay 3 hours to isolate UPS and Battery charger on
APP
ESD0 Push Button
Located atIn front of LERIn front of ESWRIn front of CCR
This PB is use for isolate power in the room in case of fire.
Power Isolation Push Button
LER and ESWRActivate ESD1Stop/Inhibit to start EDGIsolate APP battery charger120 seconds delay to isolate APP UPS
This will lead to black-out. SIS loss power.
Power Isolation Push Button
CCRActivate ESD1Isolate AQP battery charger and UPS
All HMI in CCR will loss power
Power Isolation Push Button
Photoelectric sensing detect visible fire particles
Located in AQP Workshop, CCR, Raised floors, Laboratory, Battery room
ActionConfirm smoke in Laboratory (1oo1)
PAGA tone 2Trip HVAC units and close fire dampers. Isolate all power sources within the laboratoryStart fire water pumps
Smoke Detector
ActionConfirm smoke in APP battery room (2oo2)
PAGA tone 2Close fire dampers. Start fire water pumps
Confirm smoke in AQP battery room (1oo1)PAGA tone 2Trip AQP HVACStart fire water pumps
Smoke Detector
ActionConfirm smoke in AQP workshop (2ooN in
same fire zone)PAGA tone 2Trip AQP HVAC and close fire dampers. Isolate all power sources within fire zoneStart fire water pumps
Smoke Detector
The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner struts are made of a lower expanding alloy. Designed to resist thermal energy absorption and sealed inside the shell, the struts follow temperature changes more slowly.
Designed to activate at a fixed temperature, regardless of the rate of temperature rise.
Set point is 60 DegC.
Heat Detector (Rate Compensation)
They will be used as the primary means of fire detection in areas where smoke is regularly expected and accepted (Welding workshop, mechanical workshops, EI workshop).
ActionConfirm heat in one fire zone (1ooN)
PAGA tone 2Trip HVAC units and close fire dampers. Isolate all power sources within fire zoneStart fire water pumps
Heat Detector (Rate Compensation)
Autronica AutroSafe on ALQBAutomatic 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 the flexibility to adapt to the individual requirements of any site.
Addressable Fire Panel
Smoke Detector (optical type) installed in every cabins, offices, recreation area
MAC installed in around the building to allow personnel to raise an alarm
Heat Detector install in galleyVESDA installed in TERFlame detectors at HelideckAddressable interface unit installed on every
floorsAddressable control panel is in CCR
Addressable Fire Panel
ActionConfirm fire inside ALQB
Alarm in CCR with tag and location of fire.Close fire dampersTrip ALQB HVAC Start stairwell pressurize fans
Confirm gas outside ALQB (XS-8600; signal from SIS)Alarm in CCRClose fire dampersTrip ALQB HVAC NOT Start stairwell pressurize fans
Addressable Fire Panel
ActionConfirm fire inside galley
Alarm in CCR with tag and location of fire.Close fire dampersTrip ALQB HVAC Start stairwell pressurize fansTrip galley distribution board (LSB-QP-360)
All ALQB F&G detection will not alarm to PAGA
Addressable Fire Panel
Please refer to C&E for detail actions for each F&G detection
Note