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HSEPHILOSOPHY
ADMAOPCODocumentNo. : AD219705SPHY07001 Rev.
NPCCDocumentNo. : 3291URP001 0
13/11/2014 3291URP001Rev0 2OF33
REVISION CONTROL SHEET
Rev No. Date Rev. Shts. Details of Revision
A 02/09/2014 All Issued For IDC
B 21/09/2014 All Issued for Review/Approval
0 02/11/2014 All COMPANY Comments Incorporated and Issued for Design
13/11/2
1.0 IN
1
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1
2.0 P
3.0 D
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A
N
2014
NTRODUCT
EPC 1.1
EPC 1.2
EPC 1.3
PROJECT OV
DEFINITIONS
Defin3.1
Abbre3.2
REFERENCE
Laws4.1
ADNO4.2
COM4.3
Proje4.4
Amer4.5
Britis4.6
Natio4.7
Intern4.8
Other4.9
PROJECT HS
Haza5.1
FACILITIES D
Wellh6.1
Wellh6.2
Subs6.3
GENERAL SA
Inher7.1
Form7.2
Safet7.3
SHEA7.4
ORIENTATIO
PROCESS SA
DRAINS, VEN
HAZARDOUS
Equip11.1
DMAOPCO
PCCDocume
ION ............
Package-1
Package-2
Package-3
VERVIEW ..
S & ABBREV
nitions........
eviations..
ES ...............
s / Regulati
OC HSE Ma
PANY (ADM
ect Specific
rican Petro
sh Petroleu
onal Fire Pr
national Ele
r Codes.....
SE PHILOSO
rd Manage
DESCRIPTIO
head Towe
head Towe
sea Pipeline
AFETY REQ
rent Safety
mal Safety S
ty Engineer
AMS Regis
ON & EQUIP
AFETY .......
NTS AND PU
S AREA CLA
pment Sele
HS
DocumentN
entNo.
32
TAB....................
Wellhea
NASR S
Onshore
....................
VIATIONS ...
....................
....................
....................
ons............
anual of co
MAOPCO
cations & P
oleum Instit
um (BP) Re
rotection A
ectro techn
....................
OPHY ..........
ement Philo
ON ...............
rs (WHTs).
rs (WHT-3,
es................
QUIREMENT
....................
Studies & D
ring Delive
ter..............
MENT LAYO
....................
URGE PROV
ASSIFICATI
ection.........
SEPHILOSO
No. : AD21
: 3291
291URP001
BLE OF CO....................
d Towers a
uper Comp
e Modificat
....................
....................
....................
....................
....................
....................
odes of pra
O) Standard
Philosophie
tute (API)..
ecommende
Association
nical Comm
....................
....................
osophy......
....................
....................
4, 5, 6, 7, 8
....................
T ...................
....................
Design Rev
erables.......
....................
OUT .............
....................
VISION ........
ON ..............
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OPHY
19705SPHY
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ONTENTS ....................
and Pipelin
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tions at DA
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ds, Regulat
es................
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ed Practice
n (NFPA)....
mission (IE
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Guidelines.
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19.0 IN
20.0 E
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21.0 O
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22.0 H
23.0 C
24.0 C
A
N
2014
Igniti11.2
VENT DISPE
EMERGENCY
FIRE & GAS
EMERGENCY
Fire P15.1
ESCAPE, EV
Esca16.1
Evac16.2
Temp16.3
Muste16.4
Safet16.5
Emer16.6
PERSONNEL
Mach17.1
SAFETY PHI
NTEGRITY A
ENVIRONME
Disch20.1
Disch20.2
OCCUPATIO
Noise21.1
HYDROGEN
CHEMICAL E
COMMUNICA
DMAOPCO
PCCDocume
on Source
RSION & RA
Y SHUTDOW
SYSTEM ...
Y POWER ..
Protection
VACUATION
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rgency Res
L PROTECT
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LOSOPHY O
ASSURANC
ENTAL MANA
harges to M
harges to A
ONAL HEALT
e..................
SULPHIDE
EXPOSURE
ATION & NA
HS
DocumentN
entNo.
32
s.................
ADIATION ...
WN SYSTEM
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& RESCUE
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uge.............
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sponse.......
ION & LIFE
uarding......
OF CONSTR
E .................
AGEMENT S
Marine........
Atmospher
TH PHILOSO
....................
....................
....................
AVIGATION S
SEPHILOSO
No. : AD21
: 3291
291URP001
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OPHY ..........
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OPHY
19705SPHY
1URP001
1Rev0
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MOPS .........
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1.0
1.1
1.2
A
N
2014
INTRODUADMA-OPCof Abu DhaComplex (U
The NASRMSTBOPD
PhautilizwatWH
Phasouexp
Phase-I dewells, and r(NSMFT), awell fluid pMSTBOPDdevelopme
Phase-II is Greenfield,control / mo
EPC PackaThe brief sc
1) 2)
3)
4)
5)
EPC PackaIn generalplatforms, cables, powNSMFT, Wwork shall b
DMAOPCO
PCCDocume
UCTION CO is deveabi in the AUSSC).
R field will D of crude o
ase-I - Earlyzing ABK fer through
HT 12A (US-
ase-II - Furcing injectorting exce
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pipeline to tD for three
nt is by Lar
this project Brownfieldonitoring, P
age-1 Wecope of EPC
7 nos. of neNew RiserNSMFT 2 nos. of nthe first flaHAP at USBrownfield NSMFT & WBrownfield at IGD-HAP
age-2 NA, EPC Pacflares, bridwer from D
WHT1, and Wbe executed
HS
DocumentN
entNo.
32
loping the NArabian Gu
be develoil. This prod
y Productionfacilities for
a new 20-12A) to the
ull Field Detion water v
ess dry gas
of the NASstallation of onnecting Wtie-in to ABe to four rsen and To
t, the NASRd, and Powehase-II is d
ellhead TowC Package-
ew Wellhears & Infield
ew Trunk linge of valvSC modificatio
WHT-2 modificatio
P and Tie-in
ASR Super ckage-2 (nges, bridgeAS, USSC
WHT2, and d by OTHE
SEPHILOSO
No. : AD21
: 3291
291URP001
NASR offshlf and abou
oped to seduction will
n Scheme (processing
trunk linee NASR Ma
evelopmentvia the samto Umm Sh
SR field cotwo Wellhe
WHT1 to NSBK facilities.
years befooubro.
R Full Field er from DAivided into 3
wers and P-1 includes;
ad Towers (W pipelines
nes, a 16 ve pit & a 1
ons will inc
ons will alson as per det
Complex (not part of e support s
Power Disoffshore finRS
OPHY
19705SPHY
1URP001
1Rev0
hore oil fieldut 30 km N
ecure an abe achieved
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nsists of dread TowersSMFT, infie. Phase-I dore comm
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Pipelines ;
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Main Oil Lin0 Export G
clude insta
o include Rtailed scope
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Y07001
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annual aved in two suc
minimal facproduction, m Shaif Suer (NSMFT)
producingI 20 trunk
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ent Project (ork. For eaEPC Packa
5, 6, 7, 8 &new WHTs
ne (MOL) frGas Line (E
alling Risers
iser, Tie-inse of work
ract) includdisposal weatform, Bro
sioning of a
Rev.
0
bout 131 kmof the Umm
erage prodccessive ph
cilities in thewhile sourper Comple).
to DAS line from
D HAP.
roducers anand 2), a Ma
water) pipnt will produPhase-II. P
(NSFFD), wse of execu
ages.
& 9) and existin
rom NSSC EPL) from N
s & J-tube
s & Receive
des the NSell, all infieownfield moll facilities. T
5OF33
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uction of 6hases:
e NASR Fiercing injectioex (USSC)
Island, whUS-12A, an
nd 12 injectanifold Towelines, anduce about 2Phase-I EP
which includution & bett
ng WHT-2
to DAS up NSSC to IG
e on existin
er installatio
SSC proceeld composodifications This scope
3
est per
65
ld, on
ile nd
tor wer
a 22 PS
es ter
&
to D-
ng
on
ss ite at of
13/11/2
1.3
2.0
3.0
3.1
A
N
2014
EPC PackaIn general, on DAS Islassociated executed bADMA-OPCFabricationContract-17
PROJECTEPC packainfield pipe(EGL) to IGManifold ToGreenfield
EngTow
Enginfienewbetw
EngmaiDAS
EngexcBrow
Comandcalipcom
Brownfield
Rise Rise Rise
the HAP
DEFINITIOFor the purmeanings a
DefinitionsPROJECT
COMPANY
DMAOPCO
PCCDocume
age-3 OnEPC Pack
land Procesfacilities on
by OTHERSCO has aw
n, Construc75706
T OVERVIEage 1 is thislines, the m
GD HAP, anower (NSMScope
gineering, pwers (WHTsgineering, peld pipelinew WHTs anween NSMFgineering, pn oil line (MS Island at fgineering, pess gas exwnfield mod
mplete testid the 10 EGper pigging
mmissioning Scope
er and J-tuber and J-tuber installatioexisting ga
P in USSC.
ONS & ABrpose of thiassigned th
s T
Y
HS
DocumentN
entNo.
32
shore Modage-3 (not ssing Facilin DAS Islan
S. warded NPCction, Insta
EW s project, c
main oil expnd BrownfieFT), and Br
rocurements 3, 4, 5 6, 7procuremenes (oil prodund NSMFT FT and WHprocuremen
MOL) from Nfirst flange oprocuremenxport line (Edifications ang of all infGL from NSg, hydro teg, and long-
be Installatiobe Installatioon and asss and cond
BBREVIATs documenem as follow
: N
E
: A
SEPHILOSO
No. : AD21
: 3291
291URP001
difications part of this ty and utilit
nd excluding
CC the EPllation & C
consists of sport line to Deld riser anrownfield m
t, installatio7, 8, and 9)nt, installatiouction, gasalso includT2.
nt, installatiNASR Supeof valve pit.
nt, installatioEGL) from and tie-ins rfield pipelinSMFT to IGesting, basterm preser
ons at WHTons at NSMsociated sysdensate line
TIONS nt, the wordws which a
NASR Full F
EPC Works
ADMA-OPC
OPHY
19705SPHY
1URP001
1Rev0
at DAS Islacontract) in
ties and ong the PDAS
C works (DCommission
seven new DAS Islandd J-tube insodifications
n, and com. on, and cos lift, and wding a new
on and coer Complex . on, and coNSSC to IGrequired at Ines, the 16GD HAP incseline intellrvation (mo
T2. MFT. stems inclus, anchorin
s and exprre in compl
Field Develo
for Package
O
Y07001
0
and ncludes all shore MOL
S work. This
Design, Engning) for P
wellhead to (MOL), thestallations a
s at IGD HA
mmissioning
mmissioninwater injectiw infield gas
ommissionin(NSSC) up
ommissioninGD HAP inIGD HAP at MOL fromcluding flooigent piggithballing).
uding platfog, and pig r
essions listiance with A
opment Pro
e-1
Rev.
0
Brownfield L piping ands scope of w
gineering, PPackage-1
owers, all re excess gaat WHT2 an
AP.
of seven N
ng of all rision) betwees lift pipelin
ng of the c to the inter
ng of the ccluding thet USSC.
m NSMFT toding, cleaning, pre-co
orm piping areceiver fac
ted below sADNOC-Co
oject
6OF33
modificatiod tie-in to thwork shall b
Procuremenscope und
isers, all neas export linnd the NAS
New Wellhea
sers and neen the abovne and rise
complete 1rface point o
complete 1e riser and
o DAS Islanning, gauginommissionin
and tie-ins cilities on IG
shall have thoP-V1-05:
3
ns he be
nt, der
ew ne SR
ad
ew ve
ers
6 on
0 all
nd, ng, ng,
to GD
he
13/11/2
3.2
A
N
2014
EPC CON HSE CON
AbbreviatiADMA-OADNOC API ALARP ATEX BOPD BAT BP COMAH CFD COP CAP ESD EERA EIA ECMS EIS EPIRB ESSA ERP FEED FFD FEA FRA H2S HSE HAZID HAZOP HSECESHSEIA HSEMS HSSD HVACP IALA
ICAO ICP ICSS IPCMS IP IVB
DMAOPCO
PCCDocume
NTRACTOR
NSULTANT
ons PCO
S
HS
DocumentN
entNo.
32
R : N : A
s
: Abu: Abu: Am: As L: Atm: Bar: Bes: Brit: Con: Com: Cod: Civi: Em: Esc: Env: Elec: Env: Em: Em: Em: Fro: Full: Fed: Fire: Hyd: Hea: Haz: Haz: HSE: Hea: Hea: Hig: Hea: Inte
Nav: Inte: Inde: Inte: Inte: Inst: Inde
SEPHILOSO
No. : AD21
: 3291
291URP001
National Pet
Agency whotudies for th
u Dhabi Maru Dhabi Naterican PetroLow As Rea
mospheres Errels of Oil Pst Available ish Petroleuntrol of Majomputationalde of Practicil Aviation Aergency Sh
cape, Evacuvironmental ctrical Contvironmental ergency Poergency Syergency Rent End Engl Field Devederal Enviroe Risk Assedrogen Sulpalth, Safety zard Identifizard and OpE Critical Eqalth Safety &alth, Safety h Sensitivityating, Ventilernational Avigation andernational Cependent C
egrated Conegrated Prottitute of Petependent V
OPHY
19705SPHY
1URP001
1Rev0
troleum Con
o is respohe Project.
rine Operattional Oil Cooleum Institasonably PrExplosive Per Day
Technologyum or Accident Fluid Dynace
Authority Puhutdown uation and R
Impact Asstrol and MonImpact Sta
osition Indicystems Survesponse Plaineering &
elopment onmental Agssment
phide and Envirocation perability quipment a& Environmand Enviroy Smoke Delation, Air C
Association od Lighthous
Civil AviationCompetent Pntrol and Satection Conroleum/Ingr
Verification B
Y07001
0
nstruction C
onsible for
ting Compaompany tute racticable
y
Hazards amics
ublication
Rescue Anasessment nitoring Sys
atement ating Radiovivability Anan Design
gency
nment
nd Systemsmental Impac
nmental Maetection
Conditioningof Marine Ae Authoritie
n OrganizatiPerson afety Systemntrol & Moniress ProtecBody
Rev.
0
Company (N
execution
ny
alysis
stem
o Beacons nalysis
s ct Assessmanagement
g and PresAids to es ion
ms toring Systetion
7OF33
NPCC)
of HSE
ment System
ssurization
em
3
HSEPHILOSOPHY
ADMAOPCODocumentNo. : AD219705SPHY07001 Rev.
NPCCDocumentNo. : 3291URP001 0
13/11/2014 3291URP001Rev0 8OF33
LOC : Loss of Containment LEL : Lower Explosive Limit LER : Local Equipment Room MAH : Major Accident Hazard MACP : Manual Alarm Call Point MEDVAC : Medical Evacuation MOL : Main Oil Line NFPA : National Fire Protection Association OHRA : Occupational Health Risk Assessment OH : Occupational Health PAGA : Public Address & General Alarm PHA : Process Hazard Analysis PMS : Power Management System POB : Person On Board P&ID : Piping and Instrumentation Diagram PPE : Personal Protective Equipments PPM : Parts Per Million QRA : Quantitative Risk Assessment RTU : Remote Telemetry Unit SART : Search & Rescue Transponder SOW : Scope of Work SCADA : Supervisory Control and Data Acquisition SIMOPS : Simultaneous Operations SOLAS : Safety of Life at Sea TR : Temporary Refuge UPS : Uninterrupted Power Supply US : Umm Shaif UAE : United Arab Emirates USSC : Umm Shaif Super Complex VHF : Very High Frequency VOIP : Voice Over Internet Protocol WHT : Well Head Tower WI : Water Injection WF : Well fluid WHSIP : Well Head Shut In pressure
4.0 REFERENCES The applicable engineering standards and codes are as shown below. Where equal but conflicting requirements are identified between codes and standards, the order of precedence will be. UAE Statutory legislation and regulation inclusive of ADNOC standards and codes
of practice. Project specifications. COMPANY engineering specifications, standards and procedures. BP standards, guidance and practice documents.
International codes and standards.
13/11/2
4.1
4.2
A
N
2014
Laws / Reg
Abu UAE
Saf Min
DeHaz
UAE Reg
Act Env
Reg Reg Reg Reg
ADNOC HSADNOC-C
ADNOC-CADNOC-C
ADNOC-CADNOC-CADNOC-CADNOC-CADNOC-C ADNOC-CADNOC-CADNOC-CADNOC-CADNOC-C ADNOC-CADNOC-CADNOC-CADNOC-CADNOC-C
ADNOC- ADNOC-CADNOC-CADNOC-C
ADNOC-C ADNOC-C
DMAOPCO
PCCDocume
gulations
u Dhabi Em
E Federal Lfety, Prevennistry of Leterminationzards E Federal Lgulations de
of Federvironment: gulations fogulations fogulations fogulation for
SE Manual COPV1-02
COPV1-04 COPV1-05
COPV2-01 COPV2-02 COPV2-04 COPV2-05 COPV2-07
COPV3-01 COPV3-03 COPV3-05 COPV3-08 COPV3-10
CoPV4-01 CoPV4-03 CoPV4-04 CoPV4-08 CoPV4-09 -CoPV4-10
COPV5-01 COPV5-03 COPV5-04
COPV5-06
COPV6-01
HS
DocumentN
entNo.
32
irate Law N
Law No 8-ntive MeasuLabour ann of the Way
Law No 24-1eveloped bral Law N
r the protecr the protecr the AssesHandling H
of codes o Hea
Ass Man HSE
Env Poll Env Wa Env
Fra Occ Occ Occ OH
Fra Fire Per
Mar Divi Saf
Con Risk Out
equ HSE
IdenEqu
SEPHILOSO
No. : AD21
: 3291
291URP001
No 8-1978
1980 Laures, Healthd Social ys and Mea
1999 Proby Federal No 24-1999
ction of air fction of Natussment of EHazardous M
of practicealth, Safety
sessment (Hnagement oE Definition
vironmental lution Prevevironmental ste Managevironmental
mework of cupational Hcupational Hcupational HR Managem
mework of e Risk Assersonal Proterine Transping Operatiofe Handling
ntrol of Majok Assessmetline HSE Duipment E Risk Man
ntification uipment and
OPHY
19705SPHY
1URP001
1Rev0
Conserva
abour and S and SocialAffairs, M
ans to Prote
otection andEnvironme9 Prote
rom pollutioural Reservnvironment
Materials
and Enviro
HSEIA) Reqof Contractons & Abbrev
Impact Assention and CManageme
ement Risk Asses
OccupationHealth Risk Health Risk Health Risk ment, Noise
Occupationssment (FR
ective Equiport Operatioons Risk Asand Workin
or Accident ent & QuanDesign phil
nagement
& Integritd Systems
Y07001
0
ation of Petr
Social Affail Care for W
Ministerial ect Employe
d Developmntal Authorection and
on vations (FEAtal Effects o
nmental Im
quirementsor HSE viations
sessment Control ent System
ssment
nal Health RManagemeManagemeAssessmen
e control & H
nal Safety RRA) pment on, Risk Asssessment ng with Hyd
Hazards (Ctitative Risklosophy for
ty assura
Rev.
0
roleum Reso
res, Part VWorkers
Order No ees against
ment of the Erity based d Developm
A Board Apof Installatio
mpact
Risk ManageentGeneraentGenerant Hearing Con
Risk Manage
sessment && Control
drogen Sulp
COMAH) k Assessmer major Ha
nce of H
9OF33
ources
V Industr
32-1982 Occupation
Environmenon Executivment of th
proved) ns
ement al al
nservancy
ement
& Control
phide
ent zard Plant
HSE Critic
3
rial
nal
nt ve he
&
cal
13/11/2
4.3
A
N
2014
COMPANYHSE102
HSE102HSE108HSE109HSE110 HSE207HSE208HSE212HSE308HSE312HSE316HSE319 HSE402 HSE533 GDL-004GDL-005GDL-006
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WHT-8 WHT-9 14 4.2
WHT-9 NSMFT 14 5.6
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From To Pipeline Nominal Diameter (Inch) Approximate Pipeline length (KM)
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ADMAOPCODocumentNo. : AD219705SPHY07001 Rev.
NPCCDocumentNo. : 3291URP001 0
13/11/2014 3291URP001Rev0 20OF33
updated to incorporate the EPC phase HSE studies/workshops findings/recommendations.
The Project SHEAMS Register being a live document will be continuously updated for various phases of the project.
8.0 ORIENTATION & EQUIPMENT LAYOUT The layout and orientation of equipments will be configured to minimise the potential of hazard escalation & personnel injury. The orientation will maximize safety and accessibility.
The WHTs will be subject to various activities in a phased manner, suitable provision for lay-down areas, maintainability, accessibility & escape facilities shall be considered in the design. Safety features to be provided in layout will include:
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 (such as fire water system, emergency power distribution system, communication system, life raft etc.) and hydrocarbon and hazardous chemical containing equipment.
The pig traps will be laid so that the trap door opening will be towards clear area from the platform away from risers and boat landing area. This is to ensure that pig impact damage to the facility is minimized in case of failure of the trap door.
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 platform
Maximise the potential for natural ventilation on platform decks and minimize potential for explosion.
Avoid locating HSECES within the footprint area of crane movement to prevent damage from dropped loads. A dropped object study shall be performed during EPC Stage.
The effect of prevailing winds is to be considered on escaping hydrocarbons or gases from the vents, wells or other equipment.
The emergency shutdown valves on the risers shall be located as close as possible to MSL at a position it can isolate majority of the riser inventory from platform.
The plant layout should have provision of sufficient laydown areas to facilitate the handling & lifting of various equipments.
Provision of guardrails with toe boards outside perimeter of all decks as per COMPANY specification.
From safety perspective, location of the risers within the platform jacket is preferred to minimise the likelihood of external impact/collisions. In case it is not feasible, design shall include measures to protect the risers against damage due to vessel impact.
The installation and orientation of the WHTs shall be such that infield pipeline layout shall not obstruct jack-up rig/ maintenance barge approach and shall minimise pipeline crossing as far as possible This applies to Helicopter approach and departure also.
HSEPHILOSOPHY
ADMAOPCODocumentNo. : AD219705SPHY07001 Rev.
NPCCDocumentNo. : 3291URP001 0
13/11/2014 3291URP001Rev0 21OF33
9.0 PROCESS SAFETY All production system should include safety devices (primary and secondary levels of protection) and have an automatic surface safety system designed to shut down part or all of the production system upon the detection of process upsets or component failure as defined in API RP 14C. Primary level of protection will be provided by ESD system and secondary level by mechanical devices (e.g. relief valve) & safety valve for overpressure protection. For WHTs, topsides and subsea pipelines will be designed fully rated based on the WHSIP to which the system is expected to be exposed. In addition to that, pressure safety devices routed to the relief/vent systems will be used, where applicable, to overcome short term operating problems. The pig trap doors shall have mechanical interlock facility to prevent inadvertent opening of the same under pressure. The design shall incorporate remotely operable valves so that the wellhead and subsea pipeline sections can be quickly isolated in the event of a release due to loss of containment. In addition, each Production Wellhead will have Sub Surface Safety Valve (SSSV), a Surface Safety Valve (SSV) and a Wing Valve (WV) for isolation. The wellhead ICSS is designed to provide the operation interface required for the control and shutdown of Production Wellhead equipment. Flanges, small-bore fittings and similar sources of potential leaks shall be minimised. Due to presence of H2S in the well fluids closed type sample points shall be provided connected to the closed drain header.
10.0 DRAINS, VENTS AND PURGE PROVISION WHTs will be designed with appropriate high point vents and low point drain connections to facilitate maintenance of topside facilities. Topside facilities venting and draining operation will be carried out under operator supervision.
WHTs shall be provided with separate closed drain header and open drain header to collect the drain fluid from different locations. The drain system shall be a gravity-based system collecting to a common drain sump tank. The liquid from drain tanks will be recovered through drain pump. Further, the Drain Sump Tank vent will route all intermittent release of hydrocarbon and toxic gas to a safe location in line with ADMA-OPCO venting Philosophy and ADNOC COPs. The vapours are vented to the atmosphere through the vent line of the drain sump tank to a safe location downwind of the prevailing wind direction. The drum will be designed for deflagration and no flame arrestor will be provided. For further detail refer the Project Vent & Drain Philosophy (Doc No.AD219-705-G-01019). In order to avoid any adverse effect, due to either radiation or dispersion of flammable / toxic gases, a vent radiation and dispersion study will be carried out to finalise the location and height of the vent stack. The location of the vent boom should not obstruct with the rig/ boat approach of the tower. In addition to that, inert gas purging distribution header and connections shall be fitted to facilitate maintenance activities. The launcher/receiver shall be purged before and after inserting/receiving the pig by venting to the vent header. Purging of pig launcher/ receiver shall be carried out with Nitrogen. Nitrogen shall be made available through the boat at WHTs during the pigging operation.
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HSEPHILOSOPHY
ADMAOPCODocumentNo. : AD219705SPHY07001 Rev.
NPCCDocumentNo. : 3291URP001 0
13/11/2014 3291URP001Rev0 23OF33
Equipment layout shall keep potential release sources as far from ignition sources as practical to prevent hydrocarbon ignition and fire escalation
12.0 VENT DISPERSION & RADIATION Vent dispersion & radiation study shall be carried out for the closed drain vent discharge on WHTs 3, 4, 5, 6, 7, 8, and 9. Flare radiation and dispersion study for IGD HAP shall also be updated. Vent dispersion study shall also be conducted for WHT 2 if there is any change in vent load or venting scenario. For the purpose of this study, vent to a safe location will be ensured so that no unacceptable risk are posed to personnel when vent gas is released. Study will cover the cold vent scenario (un-ignited release) to evaluate the impact of H2S and also cover the accident ignition of vent gas to study the radiation impact.
13.0 EMERGENCY SHUTDOWN SYSTEM An Emergency Shutdown (ESD) is a rapid response to protect personnel and equipment from injury or damage resulting from a process excursion or uncontrolled release of hydrocarbon gas or liquid to atmosphere caused by process plant or equipment failure. The objectives of an ESD are to reduce the following risks to tolerable levels:
Harm to people. Environmental damage. Commercial loss, including rebuild cost and cost of lost production.
Emergency Shutdown (ESD) is the primary control measures to avoid escalation of fire and explosion by limiting loss of containment (LOC). With the potential for fire and explosion, the shutdown logic ensures that the equipment in WHTs shutdown to a safe condition and all operational safety permissive are met before it can be reset and restarted. Provision shall be made for emergency shutdown of the individual and/or combination of WHTs from the remote Central Control Room. There are three basic hierarchical levels of shutdown system ESD-0, ESD-1 & ESD-2. They range from a total platform shutdown and power failure to relatively minor, equipment specific process stops. The shutdown systems (ESD-0/ESD-1/ESD-2) will be activated during an emergency, which constitutes a danger to the safety of personnel or an item or equipment. Each wellhead tower will have the following shutdown levels: Emergency Shutdown (ESD-0): An ESD-0 trip is initiated by an abnormal process condition. The intent of an ESD-0 trip is to isolate an individual production well, water injection well, or a portion of the wellhead tower which is operating outside safe limits while trying to keep as much of the remaining wellhead tower operating. A portion of the wellhead tower could include a single well or piece of equipment, a single process or a header on the wellhead tower. In the case of dual string well, the gas lift isolation valve will not be closed unless the Thamama V well is shutdown. For an individual well string shutdown the Gas Lift valve will shut first and then the wing valve.
HSEPHILOSOPHY
ADMAOPCODocumentNo. : AD219705SPHY07001 Rev.
NPCCDocumentNo. : 3291URP001 0
13/11/2014 3291URP001Rev0 24OF33
Emergency Shutdown (ESD-1): Platform shutdown and isolation: An ESD-1 trip at the WHT results in a total WHT production shutdown including gas lift by closing all SSVs, WVs, and XVs on the production wells. The riser ESDV on the production header is closed for outer WHT. The ESDV on the closed drain header to sump is closed. Trips the drain pump. The XV on the drain pump discharge closes. The ESDV on the gas lift header closes. Water injection continues to operate. Trip medium and low pressure HPU pump breakers and trip respective SOVs. An ESD-1 event trips the non-essential power loads in the process area fire zone on the WHT. The UPS system (both AC and DC) batteries, the PCS and telecom AC UPS distribution board 110 V breakers, etc., will remain in service. ESD-1 cascades to ESD-0. Emergency Shutdown (ESD-2): ESD-2 is the highest level of shutdown. The intent of an ESD-2 trip on the WHT is to shutdown the process areas on the WHT. An ESD-2 trip on the WHT will close the SSSVs on all production wells, close the SSVs and WVs on all water injection wells, and trip the drain and HP HPU pump breakers. The UPS system (both AC and DC) batteries, etc., will remain in service (unless an ESD-2.2 event has been initiated on the WHT). ESD-2 cascades to ESD-1. Operating sequence of wellhead valves shall be arranged by ESD system interlocking such that the valves close in the order of SDV (gas lift), WV (production), SSV & SSSV and open in the reverse order. Emergency Shutdown (ESD-2.1): Low low voltage in the UPS will trip the LER building ICSS and telecom AC UPS distribution board 110 V breakers and initiate an ESD-2. Emergency Shutdown (ESD-2.2): Confirmed fire, flammable gas, or toxic gas in the switchgear or LER building or Super Complex ESD 3 will trip upstream and downstream 11kV feeders, UPS battery switch, and initiate an ESD-2. Further details of ESD logics & various initiators for ESD levels shall be referred in the Project ESD Philosophy (Doc. No. AD219-705-G-01022).
14.0 FIRE & GAS SYSTEM Due to the explosive and toxic nature of hydrocarbon liquids and gases, the WHTs will be provided with a fire and gas detection and protection system. Existing ADMA-OPCO philosophy for normally unmanned WHTs will be extended to these new platforms also. Each WHT will be split in two zones for F&G detection, one is the outdoor deck areas and other will be the building area. Each room within the building shall be considered as sub-zones for F&G detection. The fire protection for WHTs will be provided considering burn-down mode in case of major fire. The primary goals of F&G system are:
Detect all hydrocarbon releases and fires at their incipient stage such that hazard to personnel and damage to asset are minimized.
Alert operator to a detected hazard and give information to its approximate location and extent so that timely action can be taken to minimize risk to personnel, assets and the environment.
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15.1
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HSEPHILOSOPHY
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NPCCDocumentNo. : 3291URP001 0
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The Fire Protection Philosophy will consider automatic isolation of the well and riser by signalling the ESD on confirmed fire or gas detection on the platform. Facility of linking the wellhead F&G system with the drilling rig F&G system or maintenance barge during their presence on platform shall be considered. The construction barge/drilling rig will carry prescribed fire-fighting capability including portable extinguishers and fire water monitors during maintenance/work over activities. FRA study will be performed as a part of this project and the recommendations regarding the active & passive fire protection from the study will be incorporated in the design.
15.1.1 Active Fire protection The firewater protection system goals are to:
Assist in the control of a fire by reliable, timely and effective automatic application of firewater to limit hazard escalation, provide cooling to equipment and to protect personnel.
The fixed dry firewater spray system has been considered as a means of fire protection for the equipment during SIMOPS conjunction with portable fire fighting equipment. There is no permanent fire water pumps provided on WHTs. FW supply shall be from the drilling/work-over rigs during their presence on platform. In case of fire during unmanned operation, the firewater for cooling will be provided by the fire fighting boats. Switchgear room & LER of all WHTs are protected with fire suppression system (NOVEC 1230) system, which will be initiated on detection of confirmed fire. The firewater spray system consists of a dry Cu-Ni (+0.5 mm) header with various sub-branches to spray the firewater on the protected equipments. Design of the fixed water spray system will be in accordance with NFPA 15/BP-GP 24-23 requirements.
15.1.2 Fire Extinguisher The following type of portable fire extinguishers shall be provided on each WHTs to handle the small fires.
9 KG DCP Portable fire extinguisher 50 KG DCP Wheeled fire extinguisher 9 Litre portable foam extinguisher 5 Kg portable CO2 extinguisher
The quantity & location of these extinguishers & other fire fighting & lifesaving equipments shall be marked in the FF, LS & Safety equipments location plan. All extinguishers shall be in accordance with NFPA 10, UL or equivalent approval. The helideck shall be equipped with extinguisher system complying with CAP 437 requirements.
15.1.3 Passive Fire Protection Passive fire protection shall be considered to ensure survivability of critical platform structures and equipment required long duration to give protection from direct heat of a
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16.1
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32
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s. es and stairwes will take ossible, escrea of highecations or escape / acvided.
performed
of evacuabers of throtank deck od type of life
ary evacuatsecondary mor nearby boonsidered ay & weather , lifebuoys,
ver board sMA, BP andLife jackets
unmanned in the desig
designatedss hazard, s are provid
SEPHILOSO
No. : AD21
: 3291
291URP001
early markeape routes pt be obstruch alternate rg shall not bot be greaters shall opee restricted
ways shoulshortest rou
cape routeser level thanother placecess ladde
by HSE c
ation from tow away typof each WHe raft shall b
tion is not amean of evoat. an alternativ
conditions.life jackets ituations. Ad SOLAS res equivalent
nature of gn. Howeve
d area whtake roll caded on the
OPHY
19705SPHY
1URP001
1Rev0
ed having npath. cted in any routes. be greater thr than 5m.
en in the direunduly by t
d allow the ute to mustes shall not n one from wes where rs shall be
consultant to
he Wellheape life raftsHTs. Life rabe finalized
accessible acuation sh
ve means o. MEDEVAC& BA sets
All lifesavingequirementst to 150% of
operation, er Muster Po
here persoall, and presump tank
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non-slip surf
way. No si
han 3m and
ection of sathe presenc
transit of ster points. direct escawhere they regular accinstalled. H
o verify the
ad Towers s considerinaft shall bethrough EE
in emergenhall be at th
of evacuatioC will be thrshall be str
g & rescue s. f POB shall
no temporaoint shall be
onnel can pare to evadeck. Eme
Rev.
0
rface and w
ingle accide
d for other li
afety (escapce of doorw
tretcher.
aping persostart. cess may Heat shield
e EER prov
will be throng 2x100% e provided wERA study.
ncy or becahe boat lan
on based orough helicorategically lo
equipment
l also be pro
ary refuge oe considere
safely assacuate a faergency com
28OF33
with no acce
ent should b
imited acce
pe). The widways includin
onnel throug
be requireat stair ca
visions durin
ough life racapacity a
with SART
ause of rougnding area
on emergenopter. ocated on thts shall be
ovided on th
on the WHTed at strateg
semble (0.7acility. Mustmmunicatio
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