International Energy Services Ltd. Project Title: DUPORT ENERGY PARK PROJECT Document Title Fire & Gas Philosophy Do
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International Energy Services Ltd.
Project Title:
DUPORT ENERGY PARK PROJECT Document Title
Fire & Gas Philosophy
Document Number: DMCL-IES-DEP-FGS-PHI-00001 Company
Originator
Discipline
Document Type Code
Sequential Doc. Number
DMCL
IES
FGS
PHI
00001
A
25-NOV-19
Issued for Review
O. Avbodoke
K. Ekwuluo
L. Barango
Rev
Rev. Date
Description
Prepared By
Checked By
Approved By
DUPORT Energy Park Project DMCL-IES-DEP-FGS-PHI-00001
Rev. A
Fire & Gas Philosophy
Page 2 of 26
REVISION MODIFICATION LOG Revision
Section
Description
PORT Enerrgy Park Prroject DUP DMCL--IES-DEP-FG GS-PHI-0000 01
Rev. A
Firre & Gas Ph hilosophy
Pag ge 3 of 26
TABL LE OF CO ONTENTS S 1
INTRODUCTION ......................................................................................................5
1.1
General ................... . ......................................................................................................... 5
1.2
Purpose ........................................................................................................................... 5
1.3
e .......................................................................................................................... 5 Objective
1.4
Abbrevia ations .................................................................................................................. 5
1.5
Referenc ce Document ..................................................................................................... 7
1.6
Design Codes C and Standards S ....................................................................................... 7
1.7
Facility Block B Flow.................. . ....................................................................................... 9
2
SITE AN ND ENVIRO ONMENTA AL CONDIT TIONS ....................................................10 0
2.1
Air Temp peratures .......................................................................................................... 10
2.2
Relative Humidity H .......................................................................................................... 10
2.3
Rainfall ............................................................................................................................ 10
2.4
Lightning g ....................................................................................................................... 10
2.5
Wind Spe eed and Direction .......................................................................................... 10
3
FIRE & GAS G DETE ECTION PH HILOSOPHY ..........................................................11
3.1
General ................... . ....................................................................................................... 11
3.2
Facilities s Layout ............................................................................................................ 11
4
DESIGN REQUIRE EMENTS FOR F F&G SYSTEM S ................................................14 4
4.1
Flammab ble Gas Dettection – Hydrocarbo H on gas ........................................................ 14
4.2
Fire Zone es ...................................................................................................................... 16
4.3
Flammab ble Gas Dettection – Hydrogen H (H H2) ............................................................. 17
4.4
Fire Dete ection ................................................................................................................ 17
4.5
Manual Alarm A Call P Point .............................................................................................. 19
4.6
Audible and a Visual Alarms.......................................................................................... 20
4.7
Turbine F & G Detection Requ uirements ..................................................................... 20
5
F & G LO OGIC .........................................................................................................22 2
5.1
Public Ad ddress/ Ge eneral Alarm m System .................. . ................................................. 25
LIS ST OF TA ABLES Table 1: Referenced Docum ment ................................................................................................... 7 Table 2: Codes & Standardss ....................................................................................................... 8 Table 3: Zone Crriteria ................................................................................................................ 15
DUPORT Energy Park Project DMCL-IES-DEP-FGS-PHI-00001
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Fire & Gas Philosophy
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Table 4: Alarm settings for flammable gas detector ................................................................ 16 Table 5: F & G Logic for Fire Detection ................................................................................... 23 Table 6: F & G Logic for Gas detection ................................................................................... 25
DUP PORT Enerrgy Park Prroject
1 1.1
DMCL--IES-DEP-FG GS-PHI-0000 01
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Firre & Gas Ph hilosophy
Pag ge 5 of 26
IINTRODUCTION General Duport Midstream M Company Limited (D DMCL) inte ends to ca arry out a Front-End Engineering Design (FEED) forr the propo osed Energyy Park at Egbokor E in Edo State. The purpo ose of this design is to t ensure th hat the projject require ements for a complete engineerin ng design package p are e well define ed and prop perly outline ed for the execution e off the integration of the e componen nts of the En nergy Park.
1.2
Purpose e The purpo ose of this document is to explain n in detail th he measure es to be adhered to in fire and gas detection n within Ene ergy park fa acility.
1.3
Objectiv ve The overa all objective e of this doccument is to o ensure a safe and re eliable plan nt based on proven design practice and te echnology and a with risks from potential firre hazards detection.. The main function off the Fire & Gas detec ction system m is to ensu ure that an acceptablle level of ssafety is acchieved in order to prrotect perso onnel, insta allation and environme ent against fire and explosion hazzards.
1.4
Abbrevia ations Abbreviation
Me eaning
AFF
Aq queous Film m Forming Foam F
AG
Ab bove Ground d
ALARP
Ass Low As Re easonably Practicable P
API
Am merican Pettroleum Insttitute
ASME
Am merican Socciety of Mecchanical Engineers
bbl
Ba arrels
BG
Be elow Ground d
BLEVE
Bo oiling Liquid Expanding g Vapour Ex xplosion
CO2
Ca arbon dioxid de
DUPORT Energy Park Project
Abbreviation
DMCL-IES-DEP-FGS-PHI-00001
Rev. A
Fire & Gas Philosophy
Page 6 of 26
Meaning
dB
Decibels
DCP
Dry Chemical Powder
ESD
Emergency Shutdown
EPIC
Engineering, Procurement, Installation, Commission
F&G
Fire & Gas
FAP
Fire Alarm Panel
FEED
Front-End Engineering Design
FPZ
Fireproofing Zone
FSE
Fire Scenario Envelope
GPM
Gallons per Minute
H2
Hydrogen
HSSD
High Sensitivity Smoke Detector
HVAC
Heating, Ventilation and Air-Conditioning
IR
Infra Red
KOD
Knockout Drum
LFL
Lower Flammability Limit
LPG
Liquefied Petroleum Gas
MAC
Manual Alarm Call Point
NFPA
National Fire Protection Association
PA/GA
Public Address / General Announcements
UV
Ultra Violet
DUP PORT Enerrgy Park Prroject
1.5
DMCL--IES-DEP-FG GS-PHI-0000 01
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Firre & Gas Ph hilosophy
Pag ge 7 of 26
Referenc ce Docum ment Doc. No. DMC CL-IES-DEP P-
Docum ment Title ocess Desig gn Basis Pro
PRO O-BOD-000 001 Equipment Lisst Plo ot Plan Table 1: 1 Reference ed Documen nt
1.6
Design Codes C and d Standard ds The design, procurrement, fab brication, construction c , inspectio on and tessting of all facilities, materials and instrume ents shall be in accordance to thiss specificatiion and the following internationa al standardss:
Doc. No. N API RP R 505
Document Title Recommende ed Practice for Classiffication of Locations L for Electrical Installation Facilities n at the petroleum p Cla assified as C Class I, Zon ne 0, Zone 1, and Zone e2
API RP R 521
Gu uide for Pre essure-relie eving and Depressuriing Systems
API RP R 752
Ma anagement of Hazardss Associate ed with Loccation of Pro ocess Plantt Permanen nt Buildings
API 2218
Fire eproofing Practices in i Petroleu um and Petrochemical Processing Plants
API 2510
De esign & Con nstruction off LPG installlations
API 2510A
Fire e-Protection n Considerations forr the Desiign and Op peration of Liquefied Petroleum P Gas G (LPG) Storage Facilities
GAP 2.5.2 2
Oil and Chemical Plant Layout and Spacing S
DUPORT Energy Park Project
IP 19
DMCL-IES-DEP-FGS-PHI-00001
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Fire & Gas Philosophy
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Energy Institute (previously The Institute of Petroleum) Model Code of Safe Practice in the petroleum industry; Part 19: Fire Precautions at Refineries and Bulk Storage Installations
NFPA 30
Flammable and Combustible Liquids Code
NFPA 72
National Fire Alarm Code
Guide to Fire Hazard Properties of Flammable NFPA-325
Liquids, Gases, and Volatile Solids Table 2: Codes & Standards
DU UPORT En nergy Park Project DMC CL-IES-DEP--FGS-PHI-00 0001
Rev. A
Fire & Gas Philosophy y
P Page 9 of 26 6
1.7
Facility y Block Flo ow
DUP PORT Enerrgy Park Prroject
2 2.1
2.2
2.3
DMCL--IES-DEP-FG GS-PHI-0000 01
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Firre & Gas Ph hilosophy
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S SITE AND D ENVIRON NMENTAL L CONDITIONS Air Temp peratures
Me ean minimum m ambient temperature t e:
Min n / Maximum m temperatu ure :
23oC 18 8oC / 310c
Relative Humidity y
Me ean :
69 9%
Min n / Max :
59 9% /100 %
Rainfall Heavy rainfall can be e expected in wet seasson, which normally runs from the e months off April throu ugh Octobe er
2.4
Ave erage Annu ual Rain fall :
20 025 mm
Ma aximum Dailly Rain fall :
33 38 mm
Me ean Maximum Hourly Rain R fall :
9 mm
Lightnin ng Lightning is very fre equent espe ecially durin ng the rainy season and a shall b be speciallyy considere ed in the dessign of all re elevant equ uipment.
2.5
Wind Sp peed and Direction D Design Wind W Speed:
35 5.6 m/s
A wind sp peed of 11 m/s m shall be e used for fla are radiatio on design on nly.
DUP PORT Enerrgy Park Prroject
3 3.1
DMCL--IES-DEP-FG GS-PHI-0000 01
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F FIRE & GA AS DETEC CTION PHIILOSOPHY Y General T The purpos se of providing the Fire e & Gas De etection Sysstem is to provide earlyy & reliable d detection off fire and hyydrocarbon gas release es and an early e warnin ng of potential fire and// o or flammab ble gas release to pe ersonnel so o as to en nable autom matic and/ or manual iinitiation of appropriate e actions (e e.g. activatio on of active fire protecttion system ms, initiation o of shutdown ns etc.) to avoid/ a minim mize the pottential for es scalation. C Confirmed fire and flammable gas g hazard ds shall be e indicated by a miniimum of 2 d detectors out o of a qua antity of N detectors d w where N is 3 or more. Fault alarm ms that are p part of 2ooN N, where N=3, voting logic should d be treated d by the voting logic ass gas or fire cconditions; this means that in a 2oo3 voting group, one detecttor in fault conditions rrequires 1oo2 of the re emaining de etectors for control actio on. A As the Heat detectors are highly reliable, r acttivation of single s detecctor shall be e treated as cconfirmed fire. f In case e of any exxecutive acttions based d on F&G detection, d v voting logicc sshall be co onsidered. For alarm / indication a single detector may m be sufficient. All o outdoor field d mounted detectors (fflammable gas g and fire e detectors)) shall be Zo one 1 rated iirrespective e of the actual a elecctrical haza ardous are ea classificcation. The e minimum a acceptable degree off protection n against moisture or o dust ing gress for EXTERNAL E m mounted de evices shall be to IP65 in accordance with IEC 60529. D Detection devices d mou unted within n buildings or o walk-in enclosures e shall s genera ally complyy w with a minimum of IP P41 protecction. Juncttion boxes shall have e a minimu um ingress p protection of IP65 eq quivalent. Fire F & Gass detection systems shall be designed in a accordance e with NFPA A 72.
3.2
Facilities s Layout T The layout and orienta ation of equ uipment will be configu ured to min nimize the potential p off ffire/ explos sion hazard d escalation n & person nnel injury. The orientation shalll maximize ssafety and accessibility a y. S Safety featu ures to be provided p in layout l will in nclude:
GA AP guideline es GAP 2.5 5.2 for safetty distances s criteria sh hall be used d as basis to develop d the e plot plan.
Sep paration disstance betw ween modules and utilities shall be b maintain ned to aid con ntainment of o fire hazard d and avoid d incident ca ascade effe ects.
DUPORT Energy Park Project DMCL-IES-DEP-FGS-PHI-00001
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Fire & Gas Philosophy
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Process units should be centrally located with straight approach from main gate.
Locate utility services away from hazardous areas so they will not be affected by a fire or explosion within the plant nor be a source of ignition for any potential flammable liquid or gas release.
Buildings should be located upwind or cross wind of the prevailing wind direction of any plant capable of venting fumes to the atmosphere.
The plant layout should minimize the risk to personnel, protect the environment and assets.
Equipment layout shall keep potential release sources as far from ignition sources as practical to prevent hydrocarbon ignition and fire escalation.
Maximum separation, as far as reasonably practicable, between emergency service system and hydrocarbon facility.
Provide adequate space for safe access of personnel and equipment for drilling, construction, operation and maintenance.
Maintain sufficient means of escape to enable safe evacuation from all parts of plant.
The effect of prevailing winds is to be considered on escaping hydrocarbons or gases from the vents, wells or other equipment.
Minimization of hydrocarbon inventories
Minimizing leak sources and paths
Minimizing the risk of ignition
Separation of plant and equipment areas
Safe dispersal of gas leaks
Containment of explosions within electrical enclosures
Containment of liquid leaks and spills
Accessibility for fire fighting and maintenance
Provision of adequate escape routes
Adequate fixed and passive protection systems
Limiting confinement and congestion in process areas
These principles are aimed at limiting the effects of a hazardous incident (hydrocarbon gas/liquid release or fire) to the area of occurrence. Large vessels should be located well away from the rest of the plant. The layout shall also meet requirements for vehicle and personnel traffic, security, emergency
DUPORT Energy Park Project DMCL-IES-DEP-FGS-PHI-00001
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Fire & Gas Philosophy
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evacuation, fire fighting and access for maintenance and operation. Traffic barriers shall be provided around critical equipment, where located close to roadways. Fire & Gas Zone number shall be provided for all the areas of the facility in order to identify the particular location of fire & gas detection.
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4
DMCL--IES-DEP-FG GS-PHI-0000 01
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D DESIGN REQUIREM R MENTS FO OR F&G SY YSTEM A dedicated d Fire and Gas system m shall be provided fo or the ANO OH Gas devvelopment p project facillities followiing a Gas Detection D M Mapping study during DED D stage. The F&G S System sh hall interfacce with the emergen ncy shutdo own system m (ESD) for f safety p purposes. The T F&G an nd ESD Sys stem cabine ets shall be located in the t control room. r F Following ty ypes of gas detectors will w be proviided:
4.1
Fla ammable Ga as Detectorr
H2 Gas Detecctor (Batteryy room)
Flammable Gas Detection D – Hydroca arbon gas G Generally IR hydrocarrbon detecttors shall be b used in the process facility an nd on the u utility area where w applicable in orrder to dete ect any hydrocarbon gas. In addittion, open p path gas de etectors sha all be provid ded in the perimeter p off utility batte ery limit are ea in order tto detect the e flammable e gas cloud d migrating ffrom the Prrocess area. D Detectors shall s be designed fo or continuo ous detectio on of Flam mmable gas without d damage. Detectors D sh hall be calibrated to the gas mix xture most likely to be present w where the detector d is lo ocated. T The following areas have h been identified to have th he potentiall of accumulation of fflammable gas g / air mixxtures as a minimum: Storrage Tank Area A Bulkk Liquid Sep paration Sale es Gas Com mpression and a Export Load ding Area Flassh Gas Com mpression Con ndensate Storage and Export E Gas s Processing g Area Mod dular Refine ery Area Pig Launcher/R Receiver Prod duced Wate er Degassin ng, Storage and Dispossal Fuel gas packa age Flare KOD area a
DUPORT Energy Park Project DMCL-IES-DEP-FGS-PHI-00001
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Fire & Gas Philosophy
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A minimum three (3) detectors will be provided at each of the following: HVAC air intakes of process buildings including Field Auxiliary Building, Control Room, Fire Building, Telecom building etc., Air intakes of air compressors and Generators
For detectors requirements in gas turbine, refer 4.7 of this document. Flammable gas detectors are provided to identify accumulation of gas clouds and prevent dangerous explosion clouds. Based on good engineering practice, for flammable gas the appropriate cloud size for the detection and performance requirement for each zone shall be based on the below mentioned table.
ZONE CHARACTERISTIC
SPACING REQUIREMENT (ft)
Enclosed area, Congested area,
16
Congested area with one side open Open area, Below pipe rack area
33
Table 3: Zone Criteria
Plant area shall be categorized during EPC phase based on detailed equipment layout and suitably hydrocarbon detector spacing requirement shall be finalized. The alarm settings for flammable gas detectors are as follows: TYPE Flammable gas point sensor inside Turbine /
ALARM LEVEL 1 10% LFL
ALARM LEVEL 2 50% LFL
DUP PORT Enerrgy Park Prroject DMCL--IES-DEP-FG GS-PHI-0000 01
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Compre essor hood / compa artment Flamma able gas
10% LF FL
50% LF FL
point se ensor processs plant and HVAC & air compres ssor inlet Table 4: Alarm se ettings for fllammable ga as detector
F For evapora ating liquid releases likke un-stabillized conde ensate, poin nt type detector siting e elevation sh hall take account of the e resulting vapour v plum me density and a air flow w patterns; iif the vapour is heavier-than-air then detecctors may be b located at low elevvations of m minimum 0..6 to 1.0m from f grade level (for ou utdoors). F For lighter than t air gass, point type detectorss shall be lo ocated 0.3m m above the e potential ssource of le eakage. IIn case of confirmed c ga as detection n in flare KO OD area, it shall initiate e plant shutt down.
4.2
Fire Zon nes
T The process plant sha all be divided into logical, physicallly located fire f zones, w which can b be process s isolated. Each E zone must be easily e identtifiable with respect to o physical a and/or proccess bounda aries.
Fire e zone mea ans the ma aximum are ea to preve ent escalatio on of fire caused c by one e fire scena ario on the ground g level.
Wh here the se eparation distance bettween proc cess equipm ment is less than or equ ual to 15 m,, it is consid dered that th hese equipm ment are in the same Fire F Zone.
Wh here the sep paration disstance between proces ss equipmen nt is more th han 15 m, it ca an be considered that this equipm ment are in the t separate Fire zone es.
Considering th he maximum m fire waterr demand fo or a Fire zone, Fire zon ne can be divided into Sub-Fire S zo ones, only for estimatting precise e firewater demand, deluge valve ssizing and drain d sizing.
Developme ent of sub fire zones sh hall be limitted to fire & gas detection and fire water system des sign.
DUP PORT Enerrgy Park Prroject
4.3
DMCL--IES-DEP-FG GS-PHI-0000 01
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Flammable Gas Detection D – Hydroge en (H2) Poison ressistant catalytic bead tyype H2 gas detectors will w be provided in the b battery room. The flamm mable hydrog gen gas dettectors will have alarm m signal settings at: 10% % LEL (Alarm m Level 1) 20% % LEL (Alarm m Level 2) T These detectors shall be b installed at the ceiling level.
4.4
Fire Dete ection W Within the AGPC A facilitty, the follow wing types of fire detec ctors shall be b provided: 1. Flam me Detectorr 2. Aspirated smokke (HSSD) 3. Smo oke Detecto or 4. Hea at (RC / ROR R type)
4.4.1
Flame De etectors Multi specttrum Triple IR (IR3) typ pe flame de etectors will be provided d to cover open o process arrea. Flame dete ectors shall be located to encomp pass the ma aximum area a within their cone of vision. The locatio on and spaccing of dete ectors shall be the resu ult of an eng gineering evvaluation that include es the follow wing as perr sect.5.8.3..2.1 of NFPA 72. . Eacch area to be e protected by b flame de etector shalll be covered d by at leas st two flame detectors to t enable initiating co onfirmed fire e detection signal. In applications where the fire to be b detected d could occu ur in an area a not on the e optical he distance shall be reduced or de etectors sha all be added d to axis of the detector, th compensate for the an ngular displlacement off the fire in accordance e with the manufacturer’s docum mented instrructions as per sect.5.8 8.3.2.3 of NFPA N 72. Within AGP PC facility, flame detecctors shall be b provided at the following locatio ons as listed below w: Storrage Tank Area A Bulkk Liquid Sep paration Sale es Gas Com mpression and a Export Load ding Area Flassh Gas Com mpression
DUP PORT Enerrgy Park Prroject DMCL--IES-DEP-FG GS-PHI-0000 01
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Pag ge 18 of 26
Con ndensate Storage and Export E Gas s Processing g Area Mod dular Refine ery Area Pig Launcher/R Receiver Prod duced Wate er Degassin ng, Storage and Dispossal Fuel gas packa age Flare KOD area a Dies sel storage area
4.4.2
Smoke Detector D F Following ty ypes of smo oke detectors shall be provided wiithin the buiildings. Optiical type sm moke detectors Aspirated type smoke dete ectors Optiical type sm moke detectors will be installed witthin: Adm ministration building Field d Auxiliary Building B Officce areas Con ntrol room Sub-station Tele ecom Buildin ng Smoke dettector coverrage shall be b based on n NFPA 72 standard. Duct moun nted type sm moke detecttors will be installed wiithin the HV VAC air intakes Addressab ble type smo oke detecto or shall be u used inside the building gs and conn nected to a dedicated Fire alarm Panel P (FAP P). For control room, field d auxiliary buildings b and Telecom building, sm moke detectors shall be conside ered for falsse floor/ceiling voids.
4.4.3
Heat Dete ector Following types t of hea at detectorss will be pro ovided in the e facilities. Rate of rise e (or) Rate compensatted (RC) typ pe heat dete ector Rate of rise e (or) Rate Compensa ated type he eat detectors, as applic cable, will be e provided for the follo owing: Tran nsformers
DUP PORT Enerrgy Park Prroject DMCL--IES-DEP-FG GS-PHI-0000 01
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Pantry rooms Warre house / Workshop W Che emical Stora age room
H Heat detecttor set pointt should be 68°C. In arreas of high h ambient te emperature,, it is to b be set at 30 0°C above the t anticipa ated ambien nt temperatu ure or neare est standarrd fixed ssetting abov ve 30°C. IIn open, naturally ventilated are eas point heat h detecttors should d be sited with a d density in the order off one detecctor per 10 m² and at a maximum m spacing of 5 m a apart. In enclosed, e mechanically ventilate m ed modules s point he eat detectors are iinstalled at a density of o at least one o per 25 5 m², and at a maximu um spacing of 7m a apart. H Heat detecttors shall no ot be applie ed in areas where w ceilin ng heights are a above 8m. 8 A Addressable type heatt detector shall be use ed inside the e buildings and conneccted to a dedicated d Fire alarm Panel (FAP P).
4.5
Manual Alarm A Calll Point M Manual alarrm call poin nts (MAC) shall be strattegically loc cated throug ghout the fa acilities n near critica al equipmen nt (includin ng pig trap p area), alo ong the es scape route es and a adjacent to exits from enclosed e arreas. A Addressable type MAC C shall be used inside buildings. b M MAC shall be b located 1. Alon ng roads in the plant area at intervvals not excceeding 100 0m, prefera ably located near to lamp po ost 2. Outs side controll room(s) 3. Exitss of building gs 4. Entrry and exit points p of a pump p house e 5. Insid de process areas, the maximum distance d to any a MAC sh hall not excceed 30m. M Manual alarrm call poin nt station sh hall be fixed at an acce essible heigh ht, between n 1.0 to 1 1.5 meters.
DUP PORT Enerrgy Park Prroject
4.6
DMCL--IES-DEP-FG GS-PHI-0000 01
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Audible and Visua al Alarms The audiblle and visua al alarm sha all be transm mitted to PA A/GA Syste em and PA/GA system shall autom matically acctivate the visual v and acoustic a alarms which are a distingu uishable forr Fire and Flammable g gas detectio on. The three tone audible alarm/sire en shall be capable of a sound ou utput not lesss than 115 dBA or mo ore at a disttance of 1(O One) meter from source e and shall be audible in all parts of the plant and distinguishable from audible e alarms used for other purposes. The three tones shalll also disting guish alarm m for Firre detection n Fla ammable gas detection n Ge eneral Alarm m There sha all be two lo ocal visual alarm beacon lights capable of continuouss operation without adv verse effectt and shall be b colored Fire e detection – Red Fla ammable ga as detection n – Yellow (o or Amber) The selectted colours will be also o clearly discernible against artificial lighting g (for those installed in nside buildin ngs) or sunlight (for the e alarms insstalled outdo oor). A manual operation should s be required to silence the e alarm. Th he alarm shall not be automatica ally silenced d or cancelled.
4.7
Turbine F & G Dettection Re equiremen nts Fla ammable Ga as detection n at ventilation air intakke (combustion and en nclosed cha amber). Vo oted flammable gas (2ooN) ( sha all trip turb bine but maintain enc closure purg ge fans. Fla ammable Ga as detection n at ventilation outlet (2 2ooN). Fla ammable Ga as detection n inside the e enclosure e to detect internal leakages. Votted flammable gas (2o ooN) shall trrip turbine but b maintain n enclosure e purge fans. Fla ame detectio on in enclo osure. Due to ambient temperature limitation n of IR type flame detectors, UV V detectors should be applied. Vo oted flame (2ooN) ( sha all trip turbiine, trip en nclosure fan n, close da ampers and d activate the fire pro otection systtem.
DUPORT Energy Park Project DMCL-IES-DEP-FGS-PHI-00001
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Fire & Gas Philosophy
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Heat detectors in enclosure (rate compensated type). Single heat detector shall have the same executive actions as confirmed flame detection. Refer manufacturer’s details for F&G logic for turbines.
DUPORT Energy Park Project
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F & G LOGIC The F&G logic shall consider following actions upon detection.
AREA
DETECTION
ACTION
FIRE DETECTION Process Area Fire zone
1ooN flame
Control room and Fire station
detector in the fire zone
Audible and visual alarm on
Activate audible and visual alarm in the affected fire zone
2ooN flame detectors in the same group (within a fire zone) activation
Audible and visual alarm on Control room and Fire station
Activate audible and visual alarm in the affected area
Total process shutdown
Depressurization of process unit of the affected area (except for fires in flare KOD area)
Activate the fire protection system. where applicable
Initiate the firewater pump start
Buildings
1ooN smoke detector
Audible and visual alarm on Control room and Fire station
Activate audible and visual alarm in the affected fire zone
2-out-of-N smoke
Audible and visual alarm on Control room and Fire station
detectors
Activate audible and visual alarm in the affected fire zone
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Minimize spread of smoke and supply of oxygen to the fire by closure of automatic fire doors, where applicable
Activate the fire protection system, where applicable
Close Fire dampers and tripping of ventilation fans Battery room /
1ooN heat
Transformers/
detector
Control room and Fire station
Pantry rooms / Ware
Audible and visual alarm on
Activate audible and visual alarm in the affected fire zone
house
Close fire dampers for attery room (in case of battery room only)
HVAC air intake
1ooN Smoke
Audible and visual alarm on
detector at HVAC
Control
air intake
room and Fire station
2ooN Smoke
Control room and Fire station
detector at HVAC air intake
Audible and visual alarm on
Close HVAC air intake dampers
Trip HVAC unit to affected building
Manual Alarm Call
1ooN Manual
point
alarm call point
Audible and visual alarm on Control room and Fire station
Activate audible and visual alarm in the affected fire zone
Table 5: F & G Logic for Fire Detection
DUPORT Energy Park Project
AREA
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DETECTION
ACTION
GAS DETECTION Process Area Fire 1ooN gas zone detector in the fire
Control room and Fire station
zone
Audible and visual alarm on
Activate audible and visual alarm in the affected area
Tripping of electrical supplies to electrical apparatus / equipment that are not hazardous area certified or deemed non – emergency equipment and are located within the affected area
Total process shutdown
Depressurization of process product of the affected area
Activate fire protection system (Deluge system) where applicable
Shutdown of rotating equipment in the affected area
Shutdown and heat exchangers and heaters within the affected area
2ooN flame detectors in the same group (within a fire zone) activation HVAC Air Intake
1ooN detector
smoke
2-out-of-N smoke
Audible and visual alarm on Control room and Fire station
Audible and visual alarm on Control room and Fire station
DUP PORT Enerrgy Park Prroject DMCL--IES-DEP-FG GS-PHI-0000 01
Rev. A
Firre & Gas Ph hilosophy
Pag ge 25 of 26
detectors
Close e HVAC Airr intake damp pers and alll fire dampe ers
Trip HVAC unit to affected building
For confirmed c gas detection at HV VAC air inta ake of CCR, initiate plant tota al shutdown n
Battery
room
– 1ooN
Hydroge en Detection n
heat
Audib ble and visu ual alarm on n Conttrol room an nd Fire station
detector
Startt exhaust fa an
Activvate audible e and visual alarm m in the affe ected fire zo one
Initiate battery charging c
Table 6: F & G Logic fo or Gas detec ction
Note: Automaticc depressurrizing shall be b carried out o only for the affected d fire zone of o the plantt and the depressurizi d ng of the re emaining zo ones will be e decided by b the opera ator. Inhibitt is provide ed to preven nt initiation of depresssurization off more than n one fire zone z at anyy point of time. i.e. Ba ased on co onfirmed F& &G in Fire zone A, automatic sh hutdown off entire pla ant and auttomatic blow w down of that particular fire zo one (Fire Zo one A) will happen. The T Logic solver shall be b designed d in such a way that when there iss automaticc blow dow wn in Fire Zone Z A, all other o fire zones z autom matic blow down will be b inhibited and only permissive p shall be pro ovided.
5.1
Public Address/ A G General Alarm Syste em
a Genera al alarm sysstem is to alert a person nnel in the field f during The Publicc address and normal and d also emerrgency situa ation by trig ggering alarm m and verbal announccement. The Publicc Address and a Plant Alarm A System consists of loudspeakers which h must be strategically located through h the plant area, in order to ena able person nnel to listen to vo ocal messag ges or alarm ms from any point of th he plant, the system shall be audible at all plant points.
DUPORT Energy Park Project DMCL-IES-DEP-FGS-PHI-00001
Rev. A
Fire & Gas Philosophy
Page 26 of 26
The system shall allow the application of an evacuation signal to one or more zones and, at the same time and, shall allow voice paging to the other zones selectively or in any combination. The alert tone preceding any message shall be permitted to be a part of the voice message or to be transmitted automatically from a separate tone generator. To ensure that audible public mode signals are clearly heard they shall have a sound level at least 15dB above the average ambient sound level or 5dB above the maximum sound level having duration of at least 60 seconds, whichever is greater, measured 1.5m above the floor in the area occupied, using the A-weighted scale (dBA). The PA/GA System shall consist of microprocessor - based page/multiparty systems, distributed across the entire project site. The systems shall provide both page/party operation and intercom operation utilising Call Points located at locations throughout the facilities. The system shall be capable of supervising and monitoring all systems circuits and devices to monitor fault information and to establish that devices can respond. The systems shall also conduct periodic self - diagnostics on the various subsystems and report failures. When a fault is detected an audible alarm shall be sounded and a visual indication shall be displayed at the local Control Room and Technical Room Access Panels and on the DCS Operator screens. PA/GA Zones shall, to the greatest extent possible, be consistent with Fire and Gas zones. The PA/GA system shall provide telephone access and shall broadcast voice messages from the telephone input Major alarm signals to be provided are:
Fire
Gas (Hydrocarbon)
ESD