RUWAIS LNG PROJECT
Project Basis Of Design
COMPANY DOCUMENT REF. RLNG-000-PM-BOD-2002 CONTRACTOR DOC. REF.
215122C-000-PP-2002
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ADNOC GAS
Project Basis Of Design
COMPANY Contract No.
4700022871
JV TJN RUWAIS Contract No
215122C
Document Class
Class 1
Document Category (for Class 1)
Category 2
OPERATING CENTER Contract No.
OPERATING CENTER Doc Ref.
0A
ICR – Issued for Client Review
13-Mar-2025
A de Vandière T Sakamoto M Vallivel
S Deilles K Fujii
0
ICR – Issued for Client Review
12-Jun-2024
A de Vandière
T Sakamoto M Vallivel
S Deilles K Fujii
Rev.
Revision Purpose
Date
Prepared by Checked by Approved by
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Project Basis Of Design
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Table of Contents
1.0
2.0
3.0 4.0 5.0
6.0
7.0
8.0
5.1 Measurement Units 5.2 Unit Prefix’s
1.1 Project Detailed Description 1.2 Scope of the Document 1.3 Holds List
2.1 Codes and Standards 2.1.1 2.1.2 2.1.3 2.1.4 2.2
INTRODUCTION … 7 7 8 9 REFERENCES … 9 9 Order of Precedence … 9 Codes and Standards … 9 Industry Practices … 9 Marine Facilities … 9 10 Inputs/ Reference Documents DEFINITIONS … 11 ABBREVIATIONS … 13 UNITS OF MEASUREMENT … 15 15 18 GENERAL PROJECT DESCRIPTION … 18 18 Topography … 18 Coordinates … 19 Plant Configuration and Layout … 20 20 20 20 Process Facilities … 20 Storage … 21 Utilities … 22 Buildings … 22 Activities performed by Others. … 22 PROJECT EXECUTION … 23 23 LNG Plot … 23 LNG Jetty … 23 Equipment … 23 METEOROLOGICAL DATA… 23 23 24 24 24 25
6.1 Plant Location 6.1.1 6.1.2 6.1.3 6.2 Geotechnical 6.3 Seismic Design 6.4 Scope of Project 6.4.1 6.4.2 6.4.3 6.4.4 6.4.5
7.1 Pre-Investment and Potential Future Expansion 7.1.1 7.1.2 7.1.3
8.1 Air Temperature 8.2 Ground Temperature 8.3 Barometric Pressure. 8.4 Cloud Cover 8.5 Relative Humidity.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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9.0 10.0
11.0
12.0
8.6 Rainfall 8.7 Wind conditions
25 25 METOCEAN DATA … 27 BASIC DESIGN DATA … 29 29 10.1 General Operating Philosophy 29 10.2 Design Life [Ref. 86] 29 10.3 Feed Gas Quality 29 10.4 Feed Gas Pipeline Battery Limit 10.5 Plant Production, Availability and Turndown 30 10.5.1 Plant Production … 30 10.5.2 Plant Availability … 30 10.5.3 Plant Turndown … 30 10.5.4 Plant Maintenance ‘Turnarounds (TAR’s)’ … 31 31 10.6 LNG Product Specification 31 10.7 Refrigerant Specification 32 10.8 Design Ambient Air Conditions 10.8.1 Process Design Ambient Temperature … 32 10.8.2 Mechanical Design Temperatures … 32 10.8.3 Design of Electrical Equipment and Electrical … 33 10.8.4 Design of Instruments & Telecoms … 33 10.8.5 Design of Equipment … 34 10.8.6 HVAC … 34 10.8.7 Black Body Temperature & Solar Radiation … 34 34 10.9 34 10.10 Design Rainfall 35 10.11 Design Relative Humidity 35 10.12 Design Wind Speed 35 10.13 Maintenance and Inspection 35 10.14 Equipment Selection and Design Philosophy 36 10.15 Sparing Philosophy PROCESS FACILITIES … 37 37 11.1 Introduction 37 11.2 Gas Inlet Facilities 37 11.3 Liquefaction and Refrigeration 37 11.4 Nitrogen Rejection Unit (NRU) UTILITIES … 38 38 12.1 Introduction 38 12.2 Power Generation 38 12.3 Fuel Gas System 38 12.4 Diesel Fuel System 38 12.5 Plant and Instrument Air System 38 12.6 Nitrogen System 39 12.7 Utility Water System 39 12.8 Fire Water Systems
Insulation Heat Inleak Specification
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13.0
14.0
15.0
16.0
17.0
18.0 19.0 20.0 21.0
14.1 Flare and Overpressure Protection Philosophies 14.2 Flare Systems
12.9 Drainage and Wastewater Treatment 12.10 Marine Vessel Ballast Water 12.11 Chilled Water
39 39 40 STORAGE AND LOADING … 40 40 13.1 Refrigerant Storage 40 13.2 LNG Storage and Loading LNG Storage … 40 13.2.1 13.2.2 LNG Loading Systems … 40 13.2.3 BOG System … 40 40 13.3 LNG Plant Marine Facilities PRESSURE RELIEF AND LIQUID DISPOSAL FACILITIES … 41 41 41 MARINE … 42 42 15.1 Jetty 42 15.2 LNG Plant Utility Jetty Interfaces 15.2.1 LNG Plant Utility Interfaces … 42 15.2.2 Marine Offloading Facility (MOF) … 42 THIRD PARTY INTERFACES … 43 43 16.1 Introduction 43 16.2 Feed Gas Pipeline 43 16.3 Electric Power (TAQA Transmission) 43 16.4 Utility Water 44 16.5 Site Security (CICPA) 44 16.6 Marine Interfaces 44 16.7 Telecommunications (Etisalat) 45 16.8 Civil Defence ENVIRONMENT, HEALTH & SAFETY CONSIDERATIONS IN DESIGN … 45 45 17.1 Hazard management 45 17.2 Emissions to Air 45 17.3 Aqueous Emissions 17.4 Noise 46 17.4.1 Ambient Noise … 46 ‘In Plant’ Noise … 47 17.4.2 INSTRUMENT, CONTROL AND SAFEGUARDING SYSTEMS … 48 MATERIALS SELECTION … 48 TELECOMMUNICATIONS SYSTEMS DESIGN … 49 ELECTRICAL SYSTEMS … 49 49 21.1 Introduction 49 21.2 Power Distribution 49 21.3 Emergency Power Supply 49 21.4 Grounding and lightning protection 50 21.5 Hazardous Area Classification 50 21.6 Cathodic Protection
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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22.0
MECHANICAL, PIPING AND CIVIL ENGINEERING … 50 50 22.1 Mechancial Engineering 50 22.2 Piping and Layout 50 22.3 Civil and structural design 51 22.4 Buildings Introduction … 51 22.4.1 22.4.2 Non-industrial Area Buildings … 51 22.4.3 Industrial Area Buildings … 51 22.4.4 Other LNG Plant Buildings … 51
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Table of Changes compared to previous revision
Paragraph
Modification description
Remarks / Origin
‐
Updated as per CPY comments
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1.0
1.1
INTRODUCTION
Project Detailed Description
The ADNOC Ruwais LNG Project is a two train, near net-zero electrically driven LNG facility, targeting international markets. The project site is located directly west of Ruwais, UAE, comprising approximately 2.15 million square meters. The feed gas for the project issupplied from the Habshan gas processing plant, via a new ~150km export gas pipeline. The plant will have two 4.8 MTPA (nominal capacity) electric driven LGN Trains with associated LNG storage/marine export facilities and utilities.
Figure 1 – Project General Context
The ADNOC Ruwais LNG Project foresees the following main components at the facility:
Onshore LNG liquefaction facilities for 2 x 4.8 MTPA (nominal capacity) electrically driven LNG
Trains (9.6MTPA total).
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Project Basis Of Design
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Common facilities including inlet receiving facilities, LNG storage, BOG handling, flare,
refrigerant storage and support buildings.
Utilities to support the facilities including import power from the national grid.
Marine facilities for LNG export.
Figure 2 – Project General Layout
The project development strategy was a fast-track FEED to support an early EPC award. To facilitate this, an existing proven reference plant is used as the basis for developing the LNG liquefaction train design.
1.2
Scope of the Document
The purpose of this document is to define the basic requirements for the design.
Note that this document does not supersede or have any higher precedence over any technical clarifications, Tender Bulletins, FEED update notices or any other official communication from COMPANY. In case of any discrepancy the official communication document prevails.
In case of any inconsistency, it shall be raised to COMPANY for clarification.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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Project Basis Of Design
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1.3
Holds List
HOLD
DESCRIPTION
1
2
4
5
Closed
Closed
Closed
Feed Gas Pipeline Tie-in details.
Closed
2.0
2.1
REFERENCES
Codes and Standards
2.1.1 Order of Precedence
The order of precedence with respect to codes and regulations that shall be followed for the design of the plant is as follows in terms of priority:
-
UAE Statutory Legislation and Regulations
-
ADNOC HSE Regulations, Standards and Codes of practice
-
Project Specifications and Standards
-
ADNOC Engineering Specifications, Standards and Procedures
-
ADNOC Guidelines, Procedures & Codes of Practice
International Codes & Standards
The latest versions (at the time of contract effective date) of all applicable Codes, Specifications & Standards shall be used as detailed in Reference 44.
2.1.2 Codes and Standards
A listing of applicable Codes and Standards [Ref. 44] for the project has been prepared in the FEED with an effective date of the contract award [Ref. 44].
The overall governing LNG Code for the facility will be NFPA 59A [Ref. 15].
2.1.3
Industry Practices
A listing of applicable Industry Standards for the project has been prepared [Ref. 44].
2.1.4 Marine Facilities
Refer to the Marine Basis of Design Report [Ref. 29] for specific codes and references related to marine activities.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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2.2
Inputs/ Reference Documents
Table 1:
Inputs/ Reference Documents
Document Number
Title
Status
Ref. No 1
2
3 4 5 6 7 8 9 10 11 12 13
14
15
16
17
18 19 20
21 22 23
24
25 26 27
28 29 30 31
DGS-00-001
AGES-GL-16-003
522175-8820-SP-0000-0001 HSE-EN-ST02 HSE-OS-ST28 HSE-OH-ST08 DGS-6000-001
359665-PE-DCA-000001 N/A FEED Update SOW - Annexure 4C-1 Att.B2 and NCM Climate Data shared via FEED UN#4 Sl.3 FEED Update SOW - Annexure 4C-1 Att.B3 and NCM Climate Data shared via FEED UN#4 Sl.3 NFPA 59A
ANNEX 3B COR-007 (TB-11 Update) ANNEX 3B ADR-020
AB15468-CRAS-001 AB15468-MCA-001 359665-0000-070-BD-0000-003
RLNG-CON22-146-L00008-VP RLNG-CON22-146-L00051 RPT-SVO230092-01
API Standard 2000 7th Edition
Rev. 1
Design General Specification – Basic Engineering Design Data Rev. 1 Basic Engineering Design Data Guideline Taziz Derivative Park – Basic Engineering Design Data Rev 2 Pollution Prevention and Control Standard Office Safety Standard Physical Health Standard Plant Noise Control
Version 1 Version 1 Version 1 Rev. 0
Plant Design Life from 25 to 30 years FEED Update Notice #1 to 12 Climate Data – Periodic Temperature, Al Ruwais Automatic Weather Station (February 2011 to December 2022, National Centre of Meteorology (NCM) Wind Roses (February 2011 to December 2022), National Centre of Meteorology (NCM) Al Ruwais Climatic Observations
Standard for the Production, Storage, and Handling of Liquefied Natural Gas (LNG) Cost Option Request for Incorporation of WIQAYA Comments Additional design requirements for jetty building and operator cabin Corrosion Risk Assessment Study (CRAS) Material Corrosion Audit (MCA) Report Heavy Hydrocarbon Removal Unit – Basis of Design With any updates as necessary to refer to the change in location from Fujairah to Ruwais Limited Notice to Proceed, Cost Options Ruwais LNG – Site Final Grade Elevation Topographical & Underground Detection Survey Report Venting Atmospheric and Low-pressure Storage Tanks
18/10/2022 N/A 22-05-2023
2019
Rev. 0
Rev 0
Rev 1 Rev 1 Rev. 0
30/04/2024 22/08/2024 Rev 1
Latest Latest Latest Latest
RLNG-000-EL-BOD-0001 RLNG-000-MA-BOD-0001 RLNG-000-PR-BOD-0002 RLNG-000-PR-BOD-0003
Electrical Design Basis Marine Basis of Design Report Process Design Basis Utility Design Basis
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PAGE 11 OF 52
Ref. No
32
33
34 35 36 37 38 39 40 41 42 43 44 45
46 47
48
49 50 51
52
53
54
55 56 57 58
59
60 61 62
63 64 65 66
67
Document Number
Title
Status
RLNG-000-MR-BOD-2026
Rotating and Package Equipment Basis of Design Latest
RLNG-000-PI-BOD-0001
Piping Design Basis
RLNG-000-PI-BOD-0002 RLNG-000-ST-BOD-0002 RLNG-000-CV-BOD-2002 RLNG-085-CV-BOD-8000 RLNG-082-HV-BOD-0001
RLNG-000-HS-PP-0001 RLNG-000-HS-PP-0101 RLNG-000-HS-PP-4001 RLNG-000-PM-PP-2000 RLNG-000-PR-PP-0001
RLNG-000-PR-PP-0005 RLNG-000-PR-PP-0007
RLNG-000-PM-PP-6008
RLNG-000-OP-PP-9419 RLNG-000-EL-PP-5100 RLNG-000-IC-PP-0002
RLNG-000-TE-PP-0002
RLNG-000-MT-PP-0001
RLNG-000-PM-SP-2002 RLNG-000-MT-SP-0001
RLNG-000-MT-SP-0002
RLNG-000-MT-SP-0004 RLNG-000-MT-SP-5001 RLNG-000-CV-SP-0001
RLNG-000-MT-SOW-5001 RLNG-000-EL-NC-5004
RLNG-000-IC-DWG-5001
Basis of Plant Layout Structural Design Basis Geotechnical Basis Of Design (Onshore) Building Design Basis Report Project HVAC Design Basis
Design HSE Philosophy Active Fire protection philosophy Environmental and Health Philosophy Applicable Codes and Standards Drainage Philosophy
Equipment Sparing Philosophy Overpressure protection, flare, relief and venting philosophy Spare Parts Strategy
Maintenance Philosophy Electrical System Design Philosophy Philosophy for Automation and Instrumentation Design IT, Telecom and Security System Philosophy
Materials Selection and Corrosion Control Philosophy
Site and Utility Data Specification For Corrosion Monitoring Of Concrete Pile Rebars Supply Specification for Corrosion Monitoring of Concrete Pile Rebars Material Selection & Corrosion Control Report Specification for Cathodic Protection Specification for Design & Construction of Drainage Systems
Cathodic Protection Scope of Work Equipment Sizing Calculation for Emergency Generator Interface Block Diagrams - Metering System
Latest
Latest Latest Latest Latest Latest
Latest Latest Latest Latest Latest
Latest Latest
Latest
Latest Latest Latest
Latest
Latest
Latest Latest
Latest
Latest Latest Latest
Latest Latest
Latest
3.0
DEFINITIONS
COMPANY
ABU DHABI NATIONAL OIL COMPANY (ADNOC) P.J.S.C.
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CONTRACTOR
EPC ADOC POC YOC
TJN Ruwais, Joint Venture of Technip Energies France-Abu Dhabi, JGC Corporation and National Marines Dredging Company (NMDC) Engineering Procurement Construction Abu Dhabi Operating center - National Marines Dredging Company Paris Operating Center - Technip Energies Yokohama Operating center - JGC Corporation
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4.0
ABBREVIATIONS
Table 2:
Abbreviations
Term/ Acronym
Definition
ADD
NADD
AGES
APCI
API
BOG
BTU
C3MR
CCB
CCTV
CICPA
DC
DCS
DGS
EDG
EI
Abu Dhabi Datum
New Abu Dhabi Datum
ADNOC Group Engineering Specification
Air Products and Chemicals Incorporated
American Petroleum Institute
Boil Off Gas
British Thermal Unit
Propane Mixed Refrigerant
Central Control Building
Closed Circuit Television System
Critical Infrastructure and Coastal Protection Authority, UAE
Direct Current
Distributed Control System
ADNOC Group General Design Specification
Emergency Diesel Generator
Energy Institute
ETIHAD WE
Etihad Water and Electricity (formerly FEWA)
ETIMAD
Etisalat
FEED
FEWA
FGS
Etimad Strategic Security Solutions L.L.C
UAE Telecommunications services provider
Front End Engineering Design
UAE Federal Electricity and Water Authority – now part of ETIHAD WE
Fire and Gas System
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Term/ Acronym
Definition
GAN
HAT
HHP
HHR
HP
HSE
HV
HVAC
ICSS
IES
JDCD
LAT
LIN
LLP
LNG
LP
LPG
LV
MCHE
MOF
MP
MR
MTPA
NB
NCM
Gaseous Nitrogen
Highest Astronomical Tide
High High Pressure
Heavy Hydrocarbons Removal
High Pressure
Health, Safety & Environmental
High Voltage
Heating, Ventilation and Air Conditioning
Integrated Control and Safety System
Instrument Equipment Shelter
Jebel Dhanna Chart Datum
Lowest Astronomical Tide
Liquid Nitrogen
Low Low Pressure
Liquefied Natural Gas
Low Pressure
Liquefied Petroleum Gas
Low Voltage
Main Cryogenic Heat Exchanger
Marine Offloading Facility
Medium Pressure
Mixed Refrigerant
Million Tonnes per Annum
Nominal Bore
National Centre of Meteorology, UAE
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Term/ Acronym
Definition
NFPA
National Fire Prevention Association
NOC
NPS
NRU
RAM
SIS
TAR
Non Objection Certificate
Nominal Pipe Size
Nitrogen Rejection Unit
Reliability, Availability & Maintainability
Safety Instrumented System
Plant maintenance ‘Turn-A- Round’
TAQA Transmission
Abu Dhabi National Energy Company - Transmission Company
TCF
TDRA
UAE
UPS
UTM
VFD
WHO
Temporary Construction Facility
UAE Telecommunications and Digital Government Regulatory Authority
United Arab Emirates
Uninterruptable Power Supply
Universal Transverse Mercator
Variable Frequency Drive
World Health Organisation
5.0
5.1
UNITS OF MEASUREMENT
Measurement Units
The units of measurement detailed in the following table shall be used [Ref. 2, Table 7.1]. This reference also contains a listing of customary units to be utilised by each discipline.
SI units shall be used for units of measurement not specifically detailed.
Table 3:
Units of Measurement
Parameter
Area
Concentration
Density
Unit
m2
ppm(v)
kg/ m3
Acceptable Alternatives
ppmw
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Parameter
Energy
Force
Gas Volume Flow
Heating Value
Length
Level
Liquid Volume Flow
Mass Flow
Molar Flow
Unit
kcal
N
MMSCFD
BTU/scf
m
%
m3/h
kg/h
kmol/hr
Molecular Weight
kg / kg mole
Power
Pressure
Pressure Differential
kW
barg
bar
Production Capacity (LNG)
MTPA
Production Capacity (Other)
te/y
Specific heat
Surface tension
Temperature
Thermal conductivity
Time
Viscosity
Volume
Weight
kJ/kgC
Dyne/cm
°C
W/mK
h
cP
m3
kg
Acceptable Alternatives
Gcal
kN
kNm3/h, Nm3/h, m3/h
Km, mm
Barrel per day (bbl/d)
Tonne per day (tpd)
MW
Bara, Pa, kPa, MPa
P, kP, MP
min, s
Te
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Parameter
Notes –
Unit
Acceptable Alternatives
1/ Normal conditions are 1.013 bara and 0°C.
Standard conditions are 14.696 psia (1.013 bar a) and 15.5°C.
2/ Inch pound system will be used for the nominal bore and rating of piping, flanges and valves.
3/ To denote millions prefix MM shall be used (not mm or 106)
4/ MMSCFD shall be for gas volumes
5/ Barrel per day (bbl/d) shall be used for hydrocarbon liquid volumes
6/ Pipe Diameter (NPS) and Insulation thickness shall be quoted in inches
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5.2
Unit Prefix’s
Table 4:
Units of Prefixes
Symbol
G
M
K
m
n
Name
Giga
Mega
Kilo
Milli
Micro
Nano
Factor
109
106
103
10-3
10-6
10-9
6.0
GENERAL PROJECT DESCRIPTION
The ADNOC Ruwais LNG Project is a two train, near net-zero electrically driven LNG facility, targeting international markets.
The feed gas for the project is supplied from the Habshan gas processing plant, via a connection to the new ~150km sales gas pipeline.
The plant is to have two 4.8 MTPA (nominal capacity) electric driven LNG Trains with associated LNG storage/ marine export facilities and utilities.
Electric power will be imported from the 400 / 132 kV TAQA Transmission grid substation.
6.1
Plant Location
The Ruwais LNG plant is located directly to the west of Ruwais, UAE.
6.1.1 Topography
Topography is to be referenced to Jebel Dhana Chart Datum (JDCD) for marine activities and to New Abu Dhabi Datum (NADD) for land-based activities, as per Geotechnical Basis Of Design (Onshore) [Ref. 36].
NADD = ADD = JDCD - 1.022m
The existing site topography is given in Topographical Survey and Underground Detection Report [Ref. 23].
The report shows that most of the site varies between elevations +1.9m and 3.0m relative to JDCD. The perimeter security fence and associated patrol are typically at +3.5m and there is a ridge of higher ground +5m bisecting the site.
Ruwais site will be handed over to the EPC CONTRACTOR after the site has been prepared up to +5m NADD for main plant and +4.0m NADD for TCF area [Ref 22].
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6.1.2 Coordinates
The UTM Co-ordinate System is used for horizontal control of site plot and marine areas.
Site allocated land is a plot area of 2.15 million m2 with the following UTM co-ordinates for the LNG Plant at the Ruwais complex [Ref. 12 FEED Update Notice 4, item 8].
Table 5: LNG Plant Horizontal Coordinates
LNG Plant Plot Coordinate
Easting (UTM)
Northing (UTM)
North West Corner (1)
North East Corner (2)
South East Inter (3)
South East Corner (4)
666,676.884
669,301.922
669,430.632
669,409.943
2,671,267.010
2,671,222.735
2,669,872.185
2,669,625.627
For the precise coordinates for the marine facilities (jetty etc.), refer to the Marine Basis of Design Report [Ref. 29].
Figure 3 – Ruwais Site Satellite Image
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6.1.3 Plant Configuration and Layout
The project consists of the following:
Feed Gas Pipeline tie in and inlet gas receiving facility
Natural Gas Liquefaction Plant for nominal 2 × 4.8 MTPA
Refrigerant Storage
Various administrative, control and maintenance buildings
Utilities units to support the liquefaction and export facilities
Two full containment 180,000 m3 LNG cryogenic storage tanks
BOG Compressors
A jetty access trestle / causeway for the LNG transfer lines and access roadway, and LNG ship
loading berth(s)
Electric power imported from the national grid via a combination of buried cables and overhead lines from the TAQA Transmission grid station to the Project 132 kV Main Intake Substation
Emergency diesel generator sets provided for emergency loads for the LNG facility
For the duration of the construction phase, the project will include an on-plot Temporary
Construction Facility (TCF)
Note that HHR unit design (including booster compressors) for future installation is on HOLD, to be advised at a later stage by COMPANY [Ref. 21]. Basis of design of HHR is provided in [Ref. 20].
6.2
Geotechnical
Geotechnical basis of design are defined in the Geotechnical Basis Of Design (Onshore) [Ref. 36].
6.3
Seismic Design
Seismic design shall be in accordance with the Structural Design Basis [Ref. 35].
6.4
Scope of Project
The LNG plant project consists of the following Units and Facilities:
6.4.1 Process Facilities
The plant facilities will comprise the following:
Consumer Reception Station ([Ref. 21]), including:
o Pig Receiver
o
Inlet Gas Filters
o Gas Metering
o Pressure Control
LNG Trains 1 & 2
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o
Liquefaction by C3MR process using electrically drive compressors with the design based on that of the ‘Reference Project’ incorporating an additional Nitrogen Removal Unit (NRU)
Note that HHR unit design for future installation is on HOLD, to be advised at a later stage by COMPANY [Ref. 21].
6.4.2 Storage
Refrigerant Storage (and unloading)
LNG Storage and marine loading together with BOG Recovery.
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6.4.3 Utilities
Power
o Main Power Distribution
o Emergency Power Generation
o UPS Systems for AC and DC supplies
Fuel Gas
Diesel Storage
Flare
Plant & Instrument Air
Nitrogen
Drainage and outfall
Utility and Potable Water
Firewater
Chilled Water
Sewage Treatment
6.4.4 Buildings
See section 25.1
6.4.5 Other activities
The following items will be performed by dedicated Subcontractors as part of CONTRACTOR activities:
Additional Onshore topographic, underground, and geotechnical survey
Additional Nearshore bathymetry and geotechnical survey
Update of the Metocean Studies
HSEIA (including Marine QRA)
RAM Study
Full Bridge Navigation Simulation
The following activities are outside the scope of the EPC and of CONTRACTOR activities:
Upstream (Habshan) gas processing facility and associated gas pipeline
Feed Gas supply from the Habshan pipeline to the established tie-in point in the LNG Plant.
Electric power system upstream to the tie-in (point of common coupling) at Plant 132kV GIS Incomers (separate room to be provided for TAQA Transmission equipment within SS-01).
LNG Carriers
LNG Bunkering Vessels, if any
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Miscellaneous other marine support vessels for LNG loading activities
Dredging activities for the access channel to the Jetty
Navigation studies (including Fast Time Navigation Study)
7.0
7.1
PROJECT EXECUTION
Pre-Investment and Potential Future Expansion
The project makes no consideration for future phases except for the plot space allocations noted below.
7.1.1 LNG Plot
The following space allocations on the LNG Plot are in included in the design:
Heavy Hydrocarbon Removal (space allocation only, without drainage of allocated space).
Specific pre-investment for potential additional 2 LNG trains is limited to allowing space in the main control room to accommodate future potential control facilities.
7.1.2 LNG Jetty
The jetty design is for twin berths.
The PROJECT includes the engineering and design for both berths. PROJECT includes procurement, construction, per-com., com. and start up for Berth1. Berth 2 is to be Engineered only with all required deliverables issued at Detailed Design level with Procurement and Construction package ready for implementation, as a future option, without impact on Berth 1 operations.
7.1.3 Equipment
Air compressors are to be rated including allowance for future HHR and Inlet Gas Compressor as defined in FEED.
8.0
8.1
METEOROLOGICAL DATA
Air Temperature
Air temperatures information is extracted from the NCM report [Ref. 13] of conditions at Al Ruwais as detailed in Table 6.
Table 6: Overview of dry/ wet bulb air temperatures:
Coldest Month Hottest Month
January
July
Maximum
33.6 (16.5) °C 51.2 (23.4) °C
Dry (Wet Bulb) Bulb Temperatures (°C)
Date
Minimum
Date
14/01/2013
6.0 (4.1) °C
23/01/2012
10/07/2013
24.2 (23.9) °C
07/07/2011
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Notes 1/ Based on Data received from NCM for 01/02/2011 to 31/12/2022 for the Al Ruwais Automatic Weather Station
8.2
Ground Temperature
The soil temperature for underground pipelines and cables is 38°C (Summer) [Ref. 3] and 13°C (Winter).
8.3
Barometric Pressure.
Extreme Maximum
Extreme Minimum
Table 7: Barometric Pressure
Barometric Pressure (hPa)
1027.2 (02/2017)
989.1 (07/2013)
Maximum Design Barometric Pressure Change (for LNG Tank Design)
2000 Pa/h with a total variation of 10,000 Pa
Notes
1/ Based on Data received from NCM for 02/2011 to 12/2022 for the Al Ruwais Automatic Weather Station [Ref. 13].
2/ Rate of change of barometric pressure change as per API 2000 used as basis [Ref. 24].
8.4
Cloud Cover
Cloud information assumed as follows:
Daily Mean:
2.39 okta
Extreme Maximum: 5.85 okta
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8.5
Relative Humidity.
Table 8 provides information on Relative Humidity obtained from the UAE NCM data for the Al Ruwais Automatic Weather Station [Ref. 13].
Table 8: Relative Humidity
Relative Humidity
Maximum
Date
Minimum
Date
Extremes
100%
Numerous
January
July
100%
100%
Numerous
Numerous
3%
9%
4%
06/2014 04/2015 04&05&08/2019
2021
2015 / 2017
1/ Based on Data received from NCM for 02/2011 to 12/2022 for the Al Ruwais Automatic Weather Station [Ref. 13].
Coldest Month Hottest Month
Notes
8.6
Rainfall
The rainfall data is as per the Specification for Design & Construction of Drainage Systems [Ref. 62], which includes and amends AGES-SP-01-007. It specifies that drainage design shall be carried out based on the return period of 5 years as given in Section 12.7.1b. and based on Figure 8 of the AGES specification (Rainfall intensity duration curves for various recurrence periods).
In addition, Stormwater & Subsoil Drainage Systems Design Manual (WA-726-1, 3rd edition April 2022) clause 3.2.4 is considered.
The rainfall data applied is as per below.
:
Storm Duration vs Precipitation (mm/hr)
Return Period
10 min
15 min
30 min
1 hour
2 hours
12 hours 24 hours
5 years
68.48
51.04
30.88
18.68
11.30
3.08
1.87
8.7
Wind conditions
Wind data based on Data received from National Centre of Meteorology for 02/2011 to 12/2022 for the Al Ruwais Automatic Weather Station [Ref. 13] and Climatic Observations for Al Ruwais [Ref. 14]:
Max.: 96.84 km/h
Average: 13.86 km/h
May to October (inclusive): Mainly North to South with average wind speeds of Beaufort wind
force 3
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November to April (inclusive): Mainly a mixture of North to South and North-West to South-
East with average wind speeds of Beaufort wind force 3
Wind data is shown below in Table 9.
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Table 9: Frequency of occurrence (%) of hourly average wind speeds in the given classes
[FEED Update Notice #4 Ref.14 - Wind Roses (February 2011 to December 2022), National Centre of Meteorology (NCM) Al Ruwais Climatic Observations]
Wind speed (m/s) Direction N NNE ENE E ESE SSE S SSW WSW W WNW NNW Total
0 ‐ 3
3 ‐ 6
6 ‐ 9
9 ‐ 12
12 ‐ 15
15 ‐ 18
18 ‐ 21
21 ‐ 24
24 ‐ 27
Total
5,77 4,25 3,30 3,56 3,74 3,26 2,34 2,16 1,67 1,48 2,24 4,98 38,75
9,77 7,72 2,63 3,37 2,95 1,53 1,05 1,17 0,62 1,36 5,83 7,88 45,88
2,26 0,97 0,23 0,14 0,22 0,40 0,38 0,26 0,13 0,60 3,13 4,47 13,19
0,15 0,03 0,02 0,01 0,02 0,10 0,15 0,08 0,02 0,05 0,37 0,98 1,97
0,01 0,00 0,00 0,00 0,00 0,01 0,03 0,02 0,00 0,00 0,02 0,08 0,20
0,00 0,00 0,00 0,00 0,00 0,00 0,01 0,00 0,00 0,00 0,00 0,00 0,01
0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00
0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00
0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00 0,00
17,97 12,97 6,18 7,08 6,93 5,30 3,95 3,70 2,43 3,50 11,59 18,40 100,00
9.0
METOCEAN DATA
Refer to the Marine Basis of Design Report [Ref. 29] for below detailed design basis:
-
Bathymetry
-
Water levels
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-
Tidal data
-
Offshore Geotechnical Data
-
Currents
-
Waves
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10.0 BASIC DESIGN DATA
10.1 General Operating Philosophy
The general operating philosophy for ADNOC Ruwais LNG Project shall be based on the following:
Stand alone, self-supporting facility with the following exceptions:
o
Imported Main Power from local distribution grid/ network.
o Utility water supply from local water network
Minimum offsite disposal of waste
Manned Central Control Room in the Central Control Building (CCB) for overall
integrated operations of LNG facilities.
10.2 Design Life [Ref. 11]
Equipment and piping systems 30 years
Marine equipment
50 years
LNG Storage Tanks 30 years
10.3
Feed Gas Quality
Refer to the Process Design Basis [Ref. 30] for below detailed design basis:
-
Feed Gas Composition
-
Feed Gas Contaminants
10.4
Feed Gas Pipeline Battery Limit
a) Operating/ Design Conditions [Ref. 12]
Pressure
o Maximum Design Pressure
93 barg
o Minimum Design Pressure
0 barg
o Normal Operating Pressure
76 barg
(at pipeline battery limit upstream of CRS)
o Maximum Line Pack Pressure
88 barg
Temperature
o Maximum (Above ground) Design Temperature 100 °C
o Maximum (Underground) Design Temperature
65 °C
o Minimum Design Temperature
-15 °C
o Maximum Operating Temperature (Summer*)
48 °C
o Average Operating Temperature*
o Minimum Operating Temperature (Winter*)
41 °C
33 °C
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Flowrate
o Maximum Flowrate (without upstream upgrade) 1500 MMSCFD
b) Pipeline Tie-in
Coordinates
o Easting
HOLD 4 - to be finalized with COMPANY
o Northing
o Elevation
Size 52 in NB
HOLD 4 - to be finalized with COMPANY
HOLD 4 - to be finalized with COMPANY
Type of termination HOLD 4 - to be finalized with COMPANY / Pipeline CONTRACTOR
10.5
Plant Production, Availability and Turndown
10.5.1 Plant Production
Each LNG train will have a nominal LNG production capability of 4.8 MTPA to provide an overall annual LNG production of 9.6 MTPA (total for two LNG trains), based on a total feed gas supply of 1,500 MMSCFD. The Inlet facilities include a 5% design allowance i.e. 1,575 MMSCFD, for low ambient temperature production.
The hourly LNG production rate is resultant for the applicable ambient air temperatures, with the design feed gas composition, utilising APCI’s C3MR liquefaction technology and refrigerant gas compressors driven by electric motors.
10.5.2 Plant Availability
A RAM study has been performed in FEED which gave a 97.53% availability This figure shall be confirmed during the RAM study update during EPC phase.
10.5.3 Plant Turndown
The LNG Plant shall be designed such that the LNG train is capable of stable long-term operation down to 50% of the nominal design case.
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10.5.4 Plant Maintenance ‘Turnarounds (TAR’s)’
Plant maintenance TARs are to be assumed to be the same as the Reference Project for each LNG Trains occurring at the following periods for compressor maintenance/ inspection:
6 years
o Minor Inspection – i.e. compressor stopped for inspection/ cleaning.
12 years
o Major Inspection – i.e. compressor stopped for rotor only and/ or rotor motor removal.
These proposed TAR periods will be confirmed during the EPC phase taking into account major equipment supplier data.
The TAR for the Inlet Facilities (feed gas compression and HHR units) will be determined later when licensor data becomes available.
10.6
LNG Product Specification
Refer to the Process Design Basis [Ref. 30] for the specification of the LNG.
10.7 Refrigerant Specification
Refer to the Process Design Basis [Ref. 30] for the specification of the below gases used as refrigerant:
-
Propane
-
Ethylene
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10.8 Design Ambient Air Conditions
10.8.1 Process Design Ambient Temperature
The ambient temperatures reflected in the table below is to be used to develop the process design in conjunction with the Liquefaction Licensor (APCI) and for calculating annualised production figures for the facility. Heat and Material Balances are performed during EPC as rating cases based on the existing FEED design.
Table 15:
Process Design Ambient Temperatures
Condition
Process Design Ambient Temperature (°C)
Minimum Mechanical Ambient Design Temperature
Minimum Dry Bulb
Average Dry Bulb
Maximum Dry Bulb
Maximum Air Cooler Design
Notes –
4oC
16oC
29oC
41oC
46oC
Remarks
Notes 1 & 3
Note 1
Notes 1 & 2
Note 1
Note 1
1/ An additional allowance of 2°C is to be added to the temperatures shown in the above table to account for the effect of hot air recirculation on the air cooler inlet temperatures.
2/ The Design Capacity of the LNG facility shall be achieved based on the average ambient temperature.
3/ Based on a 6oC minimum ambient temperature plus an allowance
10.8.2 Mechanical Design Temperatures
For mechanical design by VENDORs, refer also to the Site and Utility Data [Ref. 57].
10.8.2.1
Lower Mechanical Design Temperature
The lower mechanical design temperature shall be no higher than the minimum ambient air temperature.
The lower mechanical design temperature in pressurised equipment shall be assessed taking into account cooling during equipment blowdown/ depressurisation.
10.8.2.2 Maximum Mechanical Design Temperature
For equipment exposed to solar radiation, the maximal mechanical design temperature shall be no lower than the black body temperature.
Black Body Temperature: +87°C (concession is required for specialist liquefaction equipment e.g. MCHE).
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The maximal mechanical design temperature should be reviewed and amended for equipment and piping that is within an enclosure, insulated or in underground service i.e. not exposed to solar radiation.
10.8.2.3 Mechanical Operating Temperature
All equipment shall be capable of operation at the maximum ambient temperature specified in Section Air Temperature.
10.8.3 Design of Electrical Equipment and Electrical
Table 16:
Design of Electrical Equipment and Electrical [Ref. 3]
Condition
Outdoor (dry bulb)
Indoor (normal operation)
For design of air conditioning systems (except motors)
Soil Temperature for design of underground cables
Notes 1/ Soil thermal resistivity for design of underground cables = 2.5 km/W
10.8.4 Design of Instruments & Telecoms
Table 17:
Design of Instrument [Ref. 3]
Condition
Outdoor (dry bulb)
Indoor (normal operation)
Design Temperature (°C)
54
40
48
38 (1)
Design Temperature (°C)
58
30
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10.8.5 Design of Equipment
Condition
Table 18:
Design of Equipment [Ref. 3]
Design Temperature for Boil-Off (as per API 625 and ASHRAE climate design conditions)
Air compressors*, Process gas compressors, pumps and diesel engines
Fans and blowers
For design of equipment (unshaded)
Design Temperature (°C)
46
50
50
87
*: Air compressors shall be rated at 50°C and the additional air required at max. ambient temperature (up to 51.2°C) can be supplied by the spare compressor. Air compressors are to be rated including allowance for future HHR and Inlet Gas Compressor as defined in FEED.
Design Temperature (°C)
7 / 48
4 / 33
18 / 30
10.8.6 HVAC
Condition
Table 19: Design of HVAC [Ref. 3]
Outdoor Design Dry Bulb Temperature (Winter/Summer)
Outdoor Design Wet Bulb Temperature (Winter/Summer)
HVAC Indoor Design Temperature (Winter min / Summer max)
(for details per type of room, ref. 38)
10.8.7 Black Body Temperature & Solar Radiation
The black body temperature for the facility is 87ºC [Ref. 3].
The value of solar radiation is 946 W/m2 [Ref. 3].
10.9
Insulation Heat Inleak Specification
Vacuum jacketed vessels: boil-off rate for the equipment.
Other cryogenic externally insulated equipment, 29 W/m2.
10.10 Design Rainfall
Design for Rainfall Management shall be in accordance with Section 8.6.
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Application for the sizing of drainage system is defined in the Specification for Design & Construction of Drainage Systems [Ref. 62].
10.11 Design Relative Humidity
Minimum Relative Humidity: 1%
[Ref. 2]
Maximum Relative Humidity 100%
[Ref. 2]
10.12 Design Wind Speed
Wind Speed shall be as per the project Structural Design Basis [Ref. 35].
10.13 Maintenance and Inspection
The EPC Maintenance Philosophy [Ref. 49] references the proposed inspection as well as maintenance requirements for the facility.
10.14 Equipment Selection and Design Philosophy
Equipment selection and design philosophy shall be based on:
Technical Compliance
Schedule
Cost
Proven capability and design
Where possible and/or practical, track record of minimum two years operational experience
in similar ambient conditions.
Equipment can be utilised in a configuration that has so far not been built, provided each element has been proven in other operations and its application is specifically approved.
The project shall incorporate the maintenance experience of existing LNG plants.
‘Lessons Learnt’ from the Reference Project and other projects will be adopted to improve the design and reduce the downtime and plant trips due to electrical issue.
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10.15 Sparing Philosophy
For the LNG Train, the Sparing Philosophy is as per that of the Reference Project and the following equipment is not spared:
- Major rotating equipment
Refrigerant train compressors
NRU Compressors
- Refrigerant train ‘specialist’ heat exchangers
NRU
MCHE
Propane Chillers
- Flare
For the other areas of the plant and for more details, refer to the Equipment Sparing Philosophy [Ref. 46].
The Capital and Insurance Spares Philosophy for the project for items with an extensive replacement time are identified in the Spare Parts Strategy [Ref. 48].
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11.0
PROCESS FACILITIES
11.1
Introduction
Full details will be set out in the Process Design Basis [Ref. 30].
11.2 Gas Inlet Facilities
The purpose of the common inlet facilities is to filter, meter and regulate the pressure of the pipeline gas prior to the LNG Trains.
For more details, refer to the Process Design Basis [Ref. 30].
11.3
Liquefaction and Refrigeration
The purpose of the Liquefaction Unit is to liquefy the natural gas such that it can be stored and shipped in LNG Carriers at atmospheric pressure.
The C3MR liquefaction process based on APCI liquefaction technology has been selected with the refrigerant compressors being driven by electric motors.
The treated Feed gas is mixed with recycled BOG gas and supplied to the trains at 72 barg where it is cooled by the HHP, HP, MP and LP Propane Chillers prior to entering the Main Cryogenic Exchanger (MCHE).
For more details, refer to the Process Design Basis [Ref. 30].
11.4 Nitrogen Rejection Unit (NRU)
The purpose of the Nitrogen Rejection Unit (NRU) is to meet the LNG product nitrogen specification.
LNG exiting the MCHE is sent to an LNG Hydraulic turbine to achieve further cooling and then feeds the Nitrogen Rejection column.
The ‘on-specification LNG is produced at the bottom of the Nitrogen Rejection Column and pumped to the LNG ‘run-down’ circuit and the LNG Storage Tanks.
For more details, refer to the Process Design Basis [Ref. 30].
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12.0 UTILITIES
12.1
Introduction
Full details will be set out in the Utility Design Basis [Ref. 31].
12.2
Power Generation
Emergency Diesel Generators (EDG) are to be provided for the required load to run all equipment on the emergency board in the event of loss of mains power as well as the black start requirements.
For more details, refer to the Utility Design Basis [Ref. 31].
12.3
Fuel Gas System
The purpose of the LP Fuel Gas System is to reliably provide fuel gas to flare pilots and secondary flare purge.
For more details, refer to the Utility Design Basis [Ref. 31].
12.4 Diesel Fuel System
Diesel fuel is required intermittently for the operation of engine-driven plant equipment such as fire pumps, emergency generators and emergency Instrument Air Compressor. These will in normal operation have intermittent usage for periodic equipment testing and the diesel ‘day tanks’ will be replenished using a diesel road tanker.
For more details, refer to the Utility Design Basis [Ref. 31].
12.5
Plant and Instrument Air System
The air unit for the LNG facility supplies compressed air for the following purposes:
Dry oil free Instrument Air for instruments and purging.
Dry oil free Plant Air for pneumatic tools and other utility needs via utility stations
For more details, refer to the Utility Design Basis [Ref. 31].
12.6 Nitrogen System
The nitrogen system is required to supply nitrogen gas (GAN) for LNG Train MR make-up, inert purging of lines and equipment, compressor seals, blanketing of equipment, LNG Loading arms, flare purging and at utility stations.
The prime source of nitrogen is GAN from the LNG NRU units which also supply liquid nitrogen (LIN) to the nitrogen storage and vaporisation unit.
For more details, refer to the Utility Design Basis [Ref. 31].
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12.7 Utility Water System
Utility Water for the RLNG site is supplied via an established tie-in point.
The function of the Utility Water System is to supply water to the following users:
Potable Water System (treated to meet World Health Organisation (WHO) standards and local UAE regulations suitable for domestic usage, emergency showers and eyewash stations)
Fire Water System
Utility stations
No provision for generation of demineralized water is provided, any requirements such as cooling circuit fill/ top-up will be via a road tanker.
For more details, refer to the Utility Design Basis [Ref. 31].
12.8
Fire Water Systems
The Fire Water tank shall be filled by Utility water from the local utility water system as described in section 12.7. Firewater shall be provided to hydrants, monitors, water sprays, Hi-expansion foam, hose reels and sprinkler systems in the event of a fire on site.
The jetty firefighting systems and ring main shall be connected to the main plant firewater ring main ensuring a dual feed along the trestle to the jetty ring main.
Two Jockey Pumps (main and stand-by) are required to provide maintain fire water ring main pressure in case of leakage and supply flowrate for an hydrant.
Firewater pumps (077-P-001 A/B/C) are configured as 3 X 60%, two pumps on duty and a spare one. One pump has an electric drive, and two pumps have diesel engine drive. One of the two diesel engine driven pumps is considered as duty pump along with the electrical motor driven pump, and the second diesel engine driven pump will be a spare/stand-by pump. Fire water pumps shall be connected to the firewater distribution system which is designed for a pressure of 16 barg.
A multi-purpose building will be provided for the LNG plant to accommodate fire services and medical response. In case of fire event escalation, support from the adjacent refinery (ADNOC Refining GUP) fire station will be required.
For more details, refer to the Active Fire Protection Philosophy [Ref. 42].
12.9 Drainage and Wastewater Treatment
Effluent drainage systems shall be designed to safely convey effluents to suitable segregation, holding, treatment, sampling and disposal facilities.
The Drainage Philosophy [Ref. 45] contains details descriptions of the drains systems and their provisions for their wastewater treatment.
12.10 Marine Vessel Ballast Water
Ballast water from marine vessels is assumed to be the responsibility of the respective ship and is not to be handled by the project.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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12.11 Chilled Water
Chiller water will be supplied to the major rotating equipment on the project for motor and VFD cooling through Cooling Water Chiller Package using propane as a refrigerant.
For more details, refer to the Utility Design Basis [Ref. 31].
13.0
STORAGE AND LOADING
13.1 Refrigerant Storage
The purpose of the Refrigerant Storage Unit is to provide storage for refrigerant grade ethylene and propane for makeup as required to the process train refrigerant loops.
All refrigerants will be imported.
For more details, refer to the Process Design Basis [Ref. 30].
13.2
LNG Storage and Loading
The LNG Storage and Loading Unit shall provide adequate storage and loading facilities to allow continuous production of LNG at the design production rates and to enable regular export by LNG Carriers.
13.2.1 LNG Storage
Two full containment tanks with a working capacity of 180,000 m3 each will be provided.
The LNG Tank structure is not required to withstand an impact based on the munition’s magnitude for a suicide drone [Ref. 21].
For more details, refer to the Process Design Basis [Ref. 30].
13.2.2 LNG Loading Systems
The LNG Loading system and loading arms will have the capability to load at a maximum continuous rate of 12,000 m³/h to an LNG carrier together with a simultaneous rate of 2,000 m3/h to a potential LNG Bunkering Vessel.
For more details, refer to the Process Design Basis [Ref. 30].
13.2.3 BOG System
Boil-off Gas (BOG) from the storage and marine loading area will be compressed and sent to the liquefaction system inlet.
The BOG compressors are sized for the maximum vapour generated during ship loading of a 180.000 m3 LNG carrier at design loading rate plus 10% (to cover the potential loading of a LNG Bunkering Vessel in parallel on the LNG Carrier, in case the bunkering option is finally selected by COMPANY).
For more details, refer to the Process Design Basis [Ref. 30].
13.3
LNG Plant Marine Facilities
The LNG Jetty shall have one berth with the capability of handling one LNG carrier.
A second berth is in option with the capability of handling a LNG carrier or a LNG Bunkering Vessel.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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For more details regarding LNG carriers and support vessels considered in the design, refer to the Marine Basis of Design Report [Ref. 29].
14.0
PRESSURE RELIEF AND LIQUID DISPOSAL FACILITIES
14.1
Flare and Overpressure Protection Philosophies
Refer to the Overpressure protection, flare, relief and venting philosophy [Ref. 47] for further details.
14.2
Flare Systems
A Flare System shall be provided for the reliable and safe disposal of hydrocarbon vapour and liquid streams that result from upsets and emergencies.
The flare systems are also capable of handling hydrocarbon streams that result from operating conditions such as start-up, shutdown, venting, draining, gas purging, heating and cooling of equipment and/or piping.
There will be 2 flare systems as follows:
Dry Gas Flare
Multipoint Ground Flare
BOG (LLP) Flare
Enclosed Ground Flare
For more details, refer to the Utility Design Basis [Ref. 31] and Process Design Basis [Ref. 30].
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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15.0 MARINE
15.1
Jetty
The jetty shall be comprised of the following key components:
One Berth, plus one in option
Jetty Loading Platform, including Marine Loading Arms
Impounding Basin
Access trestle / causeway with roadway
Berthing Dolphins
Mooring Dolphins
Walkway
Jetty Control Building
A LNG Marine Bunkering station/ facility is in option (second berth).
For further details, refer to the Marine Basis of Design Report [Ref. 29].
15.2
LNG Plant Utility Jetty Interfaces
15.2.1 LNG Plant Utility Interfaces
The following utility services shall be provided at the jetty:
Instrument/ Plant Air
Nitrogen
Power (main and emergency)
Diesel (for firewater pumps, occasional replenishment via a truck/ bowser)
Potable Water (for safety showers and personnel use)
Firewater
15.2.2 Marine Offloading Facility (MOF)
MOF not required for the PROJECT.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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16.0
THIRD PARTY INTERFACES
16.1
Introduction
All third parties involved in the project are required to issue Non-Objection Certificates (NOC) as part of the project approval process as well as reviewing interfaces and providing services.
16.2
Feed Gas Pipeline
Feed Gas to the Ruwais LNG Facility is supplied via a 52” pipeline from the Habshan gas processing plant (which is outside of CONTRACTOR scope). The pig receiver, gas filters, metering and pressure control are in the project scope [Ref. 21, COR-009a].
The gas pipeline requires the following pigging services:
Cleaning pigging.
o
Frequency once per year.
Intelligent pigging.
o Baseline survey (6 months after pipeline commissioning).
o
Intervals up to 5 years.
Details of the interface with Feed Gas supplier are detailed in the Interface Block Diagrams - Metering System [Ref. 67].
16.3
Electric Power (TAQA Transmission)
The project takes its power from a 400/132kV Grid Substation located outside the plant boundary, built owned and operated by TAQA Transmission.
All details of interface are defined in the Electrical Design Basis [28].
16.4 Utility Water
Utility water for the Ruwais LNG Facility is supplied from the local ADNOC Refining – GUP. The following basis is taken for the water tie-in:
Table 27:
Potable Water Process Parameters at tie-in location
Parameter
Flow
Pressure
Temperature
Tie-in Line Size
Value
20 m³/h
2.5 barg
Ambient temperature
6in
Additional tie-in is required for fill of the fire water tanks with the tie-in basis as follows:
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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Table 28:
Fire Water Process Parameters at tie-in location
Parameter
Flow
Pressure
Temperature
Tie-in Line Size
Value
125 m³/h for 48 hours
2.5 barg
12 – 87 °C
8in
16.5
Site Security (CICPA)
The site security system (fencing, alarms, surveillance etc.) requirements shall be agreed with CICPA. ETIMAD are acting on behalf of the project with liaison over CICPA requirements and interfaces.
16.6 Marine Interfaces
The jetty location and design as well as other marine design interfaces is required to be reviewed/ approved by local Port authority.
Liaison with the local ADNOC Petroleum Port Authority, Dredging Contractor Interface & ADNOC Logistics Services’, Other Projects in the vicinity are also required for any marine survey and construction work associated with the LNG Plant jetty:
Dredging Contractor interfaces including Navigation Channel and Manoeuvring Basin, Dredged elevations Dredged slopes, Aids to Navigation markers adopted, Desktop Navigation Study /Fast time Navigation , Navigation route from outer channels to the berth, including pilot boarding locations, waiting areas and any other aspect relevant to the navigation strategy, High level towage strategy (number and type of tugs considered) .
ADNOC L&S interface including LNG Carrier Details from ADNOC L&S, LNG Loading Arms for Ship, BOG Return Arm for Ship, Mooring Point Data
16.7
Telecommunications (Etisalat)
Telecommunication interfaces are with Etisalat who require that the design is in line with the UAE TDRA guidelines:
Telecom Interface points with National Guard including national guard communication TOWER location, Integration of modified National Guard fence and telecom system at Causeway and SE access.
Feed gas pipeline operations: including LNGTP Fiber Optic Cable Routing for interconnections between (RTU , SDH, PLDS, CP), I&C Tie-ins with LNGTP RTU for Signals transmission to RLNG ICSS (DCS)/ METERING SYSTEM . LNGTP SDH with RLNG METERING system, Signal Configuration of MAQTA SCADA system with RLNG ICSS CRS signals. MODBUS firewall interface of RLNG ICSS with LNGTP RTU, LNGTP Fiber Optic Cable Routing /Corridor inside inlet facilities (CRS) up to SDH/TEL Panel Route 2.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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16.8 Civil Defence
The local Civil Defence authorities are required to inspect the camps during the construction phase. During the FEED, a gap analysis was conducted between COMPANY standards and Civil Defence Requirements. These additional requirements are optional only, refer to COR-007 [Ref. 16].
17.0
ENVIRONMENT, HEALTH & SAFETY CONSIDERATIONS IN DESIGN
17.1 Hazard management
Hazard management systems should be selected based on the hierarchy of:
Inherent safety,
-
Prevention,
-
Detection,
-
Control and
-
Mitigation.
All hazards shall be identified and assessed in accordance with the guidance in the Design HSE Philosophy [Ref. 41] with the objective of inherent safety by hazard elimination applied early in the design so far as is reasonably practicable.
17.2
Emissions to Air
Air quality at the site boundary and beyond shall satisfy the requirements of HSE-EN-ST02 [Ref. 4].
17.3 Aqueous Emissions
Any aqueous discharges to the sea shall be as per the requirements of Section 13.2.1 of the ADNOC Design General Specification – Basic Engineering Design Data [Ref. 1, Appendix 4] and Pollution Prevention and Control Standard [Ref. 4] for free oil in water as follows:
-
Desirable Limit
-
Maximum Limit
5 mg/l
10 mg/l
Regarding TSS, the limits are:
- Maximum Limit
50 mg/l (as per Drainage Philosophy [Ref. 83])
- At edge of mixing zone
33 mg/l (as per Environmental and Health Philosophy [Ref. 43])
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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17.4 Noise
17.4.1 Ambient Noise
A baseline noise monitoring survey in the project area has been carried out as part of the FEED Update to identify the following:
Nearest noise sensitive points
The background noise level at the sensitive points and their designation as per Table 30.
The table below derived from Reference 5 provides details of the permissible noise limits in public areas outside the site boundaries.
Table 29:
ADNOC Noise Allowable Limits in Different Areas [Ref. 4]
Area
Allowable Hourly Noise Level Limits (dBA) (Note 1)
Day (7 a.m.- 8 p.m.)
Night (8p.m. – 7 a.m.)
Residential Area with light traffic
Residential Area in the Downtown
Residential Areas which include some workshops and commercial business or residential area near highways
Commercial Areas and Downtown
Industrial Areas (Heavy Industry)
Notes
40 -50
45 – 50
50 – 60
55 – 65
60 – 70
1/ Exposure time for certain level of noise (hour)
30 -40
35 – 45
40 – 50
45 – 55
50 - 60
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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17.4.2 ‘In Plant’ Noise
17.4.2.1 Maximum Allowable Noise
The maximum sound pressure level is 115 dB(A) as per Plant Noise Control [Ref. 7], it is not permissible to expose personnel to sound levels that exceed this.
17.4.2.2 Area Noise Guidelines
In order to control occupational noise exposure, area noise limits should be applied typically are in accordance with the following table:
Table 30:
Area Noise Guidelines
Area
Guideline Value (dBA)
Remarks
Outdoor Equipment Areas
Equipment Rooms
Workshops
Open Plan Offices
Control Rooms
Computer Rooms
Kitchens
Social Rooms, Changing Rooms, Washrooms & Toilets
Offices and Conference Rooms
Sleeping Areas
Notes:
85
85
75
50
55
60
60
50
50
45
Notes 1 & 4
Notes 5
Notes 2, 3 & 5
Notes 2, 3 & 5
Notes 2, 3 & 5
Note 5
Note 2, 3 & 5
Notes 2, 3 & 5
Note 5
1/ As required by DGS 6000 001 Plant Noise Control [Ref. 7]
2/ As required by HSE-OS-ST28 - Office Safety Standard [Ref. 5]
3/ As required by HSE-OH-ST08 - Physical Health Standard [Ref. 6]
4/ Excludes inside acoustic enclosures, includes noise from equipment within the room and HVAC component
5/ Excludes occupational noise from within the room (e.g. printers, talking, dishwasher etc…), includes HVAC component.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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18.0
INSTRUMENT, CONTROL AND SAFEGUARDING SYSTEMS
Instrumentation and control systems shall be provided for safe and efficient operation of the plant, meeting the design criteria for product throughput, product specification and emissions.
Control and protection of the facilities shall be provided by the Integrated Control and Safety Systems (ICSS)
The ICSS is comprised of the following systems:
Distributed Control System (DCS)
Safety Instrumented System (SIS)
Fire & Gas detection system (FGS)
Operator Training Simulator (OTS)
Interfaces with packages
The above functions shall be fully integrated to provide a single interface for the monitoring, control an safety of the entire facility.
Refer to the Philosophy for Automation and Instrumentation Design [Ref. 51] for further details.
19.0 MATERIALS SELECTION
Materials selection shall primarily be based on those selected for the ENGINEERING CONTRACTOR Reference Project with a review of any changes due to the revised location climatic conditions especially for utility services.
The below audits, performed by Third Party at end of the FEED, shall be considered for the material selection at EPC stage:
-
The Corrosion Risk Assessment Study (CRAS) [Ref. 18]
-
The Material Corrosion Audit (MCA) Report [Ref. 19]
Their results will be incorporated while updating the below deliverables, that will be used as basis for EPC material selection:
-
The Materials Selection and Corrosion Control Philosophy [Ref. 53].
-
The Material Selection & Corrosion Control Report [Ref. 60].
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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20.0
TELECOMMUNICATIONS SYSTEMS DESIGN
The telecommunications systems are designed and implemented to provide an integrated redundant telecommunications infrastructure, which will support all operations, safety, maintenance, and administration including marine communications and marine trafic control.
All telecommunications systems shall satisfy the UAE TDRA Guidelines.
Telecom tower structures will be provided for telecoms equipment such as Plant and Marine VHF antennas, CCTV, etc.
Telecom systems provided for the project include PAGA, Process CCTV, Ship To Shore, Vessel Traffic Management, Meteorological, Plant Radio, VHF Radio, Radar, Audio Video Conferencing, Crane Radio, Entertainment System, GPS/GNSS, Hotline, Intercom, Fibre Optic, Various LAN network, Perimeter Intrusion Detection, Security CCTV, Access Control Vehicle Control, Structured Cabling, Telephone, Telecom Network Management, Voice Recorder.
Refer to the IT, Telecom and Security System Philosophy [Ref. 52] for better understanding of project scope.
21.0
ELECTRICAL SYSTEMS
21.1
Introduction
An Electrical Basis of Design and an Electrical Design Philosophy has been developed [Ref. 28 & 50].
21.2
Power Distribution
The Main Substation distributes power within the LNG facility through 132kV dedicated underground feeders.
Each Substation will distribute power to the end users at the appropriate voltage levels (11kV, 6.6kV, 690V, 415V, 240V for AC systems and 110V in DC systems). Additional substations (i.e. for the buildings area) will be supplied from 11kV as required.
Dual redundant Uninterruptable Power Supplies are provided in every substation to service all plant control, telecoms, fire & gas and security systems as well as emergency systems.
21.3
Emergency Power Supply
Emergency power is provided to supply the following loads:
Emergency Diesel Generator auxiliaries.
Uninterruptable Power Supply systems (UPS).
Emergency & escape lighting.
Building HVAC system.
Equipment requiring power from the emergency system are detailed in the document Equipment Sizing Calculation for Emergency Generator [66].
21.4 Grounding and lightning protection
The following earthing/ grounding arrangements are required:
HV (11 kV) Resistance Earthed.
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HV (6.6 kV) Resistance Earthed.
LV (690 V) Resistance Earthed
LV (415 V)
Solidly Earthed
The neutral of the HV supply to the site will be grounded via a resistor to limit the ground fault current. LV installations will be either solidly grounded, or resistance grounded subject to the voltage level.
Lightning protection will be provided on tall structures/ buildings and at the jetty.
21.5 Hazardous Area Classification
The classification of hazardous areas and the selection of electrical equipment for use in hazardous areas will be in accordance with the Design HSE Philosophy [Ref. 41].
21.6 Cathodic Protection
Cathodic protection interfaces for the incoming gas pipeline, underground piping and the marine facilities are defined in the Specification for Cathodic Protection [Ref. 61]. Detailed design scope and criteria are defined in Cathodic Protection Scope of Work [Ref.65] and Specification for Cathodic Protection [Ref. 61].
Additionally, corrosion monitoring systems will be installed for concrete pile rebars. Detailed design scope and criteria are defined in Specification For Corrosion Monitoring Of Concrete Pile Rebars [Ref. 58] and Supply Specification for Corrosion Monitoring of Concrete Pile Rebars [Ref. 59].
For marine facilities, refer to the Marine Basis of Design Report [Ref. 29].
22.0 MECHANICAL, PIPING AND CIVIL ENGINEERING
22.1 Mechanical Engineering
A Design Basis [Ref. 32] for Rotating and Package Equipment along with various Mechanical Specifications have been issued for the project.
22.2
Piping and Layout
The LNG train layout is based on that of the Reference Project. It was updated considering with the addition of NRU facilities and considering some specific constraints related to Ruwais location and site conditions.
A Piping Design Basis and the Basis of Plant Layout [Ref. 33 & 34] have been produced for the project along with piping specifications.
22.3 Civil and structural design
Civil design is covered by the various project civil specifications issued for the project. The Structural Design is covered by a dedicated Structural Design Basis [Ref. 35].
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
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22.4 Buildings
22.4.1 Introduction
The plant plot is divided into three areas with respect to buildings as follows:
Non-industrial Buildings Plot
Industrial Buildings
Other LNG Plant Buildings
Seismic design criteria shall be applied to buildings / shelters as required by section 6.3.
Building Management Systems will be required in the main administration building, workshops and warehouse buildings as identified in the Building Design Basis Report [Ref. 37].
All buildings shall respect the UAE Fire and Life Safety Code of Practice 2018.
22.4.2 Non-industrial Area Buildings
The following buildings functions are considered within the Non-Industrial Area:
Main Building incorporating the functionalities of the Administration building (reception, offices,
meeting rooms, etc)
Training Facilities
Visiting Contractor Facilities
Ground Maintenance Facilities
Permanent Contractor Facilities
First Aid Facilities
Mosque
22.4.3 Industrial Area Buildings
The following functions will be located within the ‘Industrial Building Area’:
Warehouse (complete with associated offices)
Workshops (complete with associated offices)
Garbage/ Waste Treatment
Chemical / Paint Store
Multipurpose Building: Emergency response facilities for medical and fire emergencies
Permanent Contractor Building
22.4.4
Other LNG Plant Buildings
The following other buildings are required:
Central Control Building (CCB)
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Jetty Control Building (combined building and includes the following functions: Telecom and Instrument, Electrical, Control Room and Maintenance staff pertaining to Jetty Area)
Gate Houses
Electrical Substations
Compressor ‘E-Houses’
Instrument IES
Equipment Shelters and other miscellaneous structures
Operator’s Cabin (See ADR-020, Ref 17)
Within the CCB, the Central Control Room shall be designed to enable occupation for a minimum of 2 hours during an internal emergency to put into effect emergency procedures and to permit evacuation to a safe location.
The terms of Contract / Agreement No: CON22-146 shall apply for any disclosure of this document to any third party.
Project: Q-32859 - NMDC - Ruwais Folder: RFQ Files