gtcl draft specification master working copy latest

7/25/2019 GTCL Draft Specification Master Working Copy Latest

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BIDDING DOCUMENT

For

Procurement of

DESIGN,BUILD AND TURNKEY ENGINEERING,PROCUREMENT,

CONSTRUCTION (EPC)&COMMISSIONING OF SCADASYSTEM

Project: Rehabilitation and Expansion of Existing Supervisory Control and

Data Acquisition (SCADA) System of national gas grid under GTCL(Component-B of Bheramara Combined Cycle Power Plant Development Project)

Country: BANGLADESH

IFB No. : GTCL/SCADA/EPC/01

Date: ----April, 2015

JICA Loan No.: BD-P71

Part 2 of 3

GAS TRANSMISSION COMPANY LIMITED (GTCL)(A Company of Petrobangla)

RED CRESCENT BORAK TOWER (LEVEL 2-6&8)

71-72 OLD ELEPHANT ROAD, ESKATON

DHAKA-1000, BANGLADESH


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Gas Transmission Company Limited

(GTCL)Rehabilitation and Expansion of Existing Supervisory Control and Data Acquisition

(SCADA) of national gas grid under GTCL (Component-B of Bheramara Combined

Cycle Power Plant Development Project)

TECHNICAL SPECIFICATION :PART 2SECTION VI. EMPLOYERS REQUIREMENTS

TABLE OF CONTENTS

Table of Contents

Invitation for Bids: Following PrequalificationSingle Stage Two Envelope Bidding

PART 1 - Bidding Procedures

Section I. Instruction to Bidders

Section II. Bid Data Sheet

Section III. Evaluation and Qualification Criteria (Following Pre-qualification)

Section IV. Bidding Forms

Section V. Eligible Source Countries of Japanese ODA Loans

PART 2 Employers Requirements

Section VI. Employers Requirements

PART 3 Conditions of Contract and Contract Forms

Section VII. General Conditions (GC)

Section VIII. Particular Conditions

Section IX. Contract Forms


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[1] TABLE OF CONTENTS

PART - 2

Section VI; Employers Requirements

TECHNICAL SPECIFICATIONS

TABLE OF CONTENTS

ABBREVIATIONS &DEFINITIONS

1. GENERAL REQUIREMENTS...................................................................................................... 1

1.1 INTRODUCTION....................................................................................................................... 1

1.2 BACKGROUND INFORMATION................................................................................................. 1

1.3 PROJECT DESCRIPTION........................................................................................................... 2

1.3.1Introduction

.................................................................................................................... 2

1.3.2 Design Outline................................................................................................................ 2

1.3.3 Design Philosophy.......................................................................................................... 3

1.3.4 Project Geography.......................................................................................................... 5

1.3.5 Petrobangla and the Employer........................................................................................ 6

1.3.6 Operating Companies..................................................................................................... 6

1.3.7 The National Gas Grid................................................................................................... 8

1.3.8 Site Description.............................................................................................................. 8

1.3.9 Gas Pipeline Operation Philosophy................................................................................ 9

1.4 INTENDED PURPOSE OF THENEW SYSTEM........................................................................... 10

1.4.1 SCADA System............................................................................................................ 10

1.4.2 Communication System............................................................................................... 10

1.4.3 Instrumentation............................................................................................................. 11

1.4.4 Valve Automation and Pressure Monitoring................................................................ 13

1.4.5 Cabling......................................................................................................................... 13

1.5 BRIEF DESCRIPTION OF THENEW SYSTEM........................................................................... 13

1.5.1 The SCADA System.................................................................................................... 13

1.5.2 The Communication System........................................................................................ 14

1.5.3 Interface of the SCADA System.................................................................................. 15

1.6 APPLICABLE STANDARDS..................................................................................................... 16

1.7 UNITS OF MEASUREMENTS................................................................................................... 22

1.8 SITE CONDITIONS AND AREA CLASSIFICATION................................................................... 22

2. SCOPE OF WORK...................................................................................................................... 24

2.1 INTRODUCTION..................................................................................................................... 24


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2.2 PROJECT MANAGEMENT....................................................................................................... 28

2.3 SITE INVESTIGATION............................................................................................................ 29

2.4 ENGINEERING AND DETAILED DESIGN................................................................................. 30

2.5 MANUFACTURE.................................................................................................................... 31

2.6 FACTORY ACCEPTANCE TEST (FAT)................................................................................... 31

2.7 PRE-INSTALLATION SITE WORKS......................................................................................... 31

2.8 INSTALLATION...................................................................................................................... 31

2.9 SITE ACCEPTANCE TEST (SAT)............................................................................................ 32

2.10 COMMISSIONING................................................................................................................... 32

2.11 SYSTEM TAKING-OVER........................................................................................................ 32

2.12 OPERATION AND MAINTENANCE SUPPORT.......................................................................... 32

2.13 TRAINING.............................................................................................................................. 32

2.14 TEMPORARY SITE FACILITIES............................................................................................... 32

2.14.1 General......................................................................................................................... 32

2.14.2 Local Site Facilities...................................................................................................... 33

2.14.3 Office Facilities............................................................................................................ 33

2.14.4 Living and Messing Accommodation.......................................................................... 35

2.14.5 Supply of Electricity and Water................................................................................... 36

2.14.6 Inspection Equipment................................................................................................... 36

2.14.7 Communication Facilities:............................................................................................ 37

2.14.8 Vehicles........................................................................................................................ 37

2.14.9 Assistance..................................................................................................................... 38

2.14.10 CD-VAT Charges on Imported Items...................................................................... 38

2.15 THE EMPLOYER'S SCOPE OF WORK...................................................................................... 39

3. CONTRACTOR'S KEY MANAGEMENT RESPONSIBILITIES............................................. 40

3.1 ADMINISTRATIVE MATTERS................................................................................................. 40

3.1.1 Co-operation................................................................................................................. 40

3.1.2 Contractor's Documents............................................................................................... 40

3.1.3 Design Submissions..................................................................................................... 42

3.1.4 As-Built Documents..................................................................................................... 43

3.1.5 Operation and Maintenance Manuals........................................................................... 44

3.1.6 Provision of Standards.................................................................................................. 45

3.1.7

Drawings and Specifications........................................................................................ 45

3.1.8 Method Statements....................................................................................................... 46


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3.1.9 Systems Design Methodology...................................................................................... 46

3.1.10 Meetings....................................................................................................................... 47

3.1.11 Coordination with Other Persons and Organizations................................................... 48

3.1.12 Liaison with Authorities............................................................................................... 48

3.1.13 Reporting...................................................................................................................... 48

3.2 PROGRAMMING AND PLANNING........................................................................................... 49

3.2.1 Planning........................................................................................................................ 49

3.2.2 Programming................................................................................................................ 50

3.3 QUALITY MANAGEMENT SYSTEM (QMS)............................................................................ 51

3.3.1 Principles...................................................................................................................... 51

3.3.2 Quality Control and Verification of the Works............................................................ 52

3.3.3 System Monitoring and Performance Improvement.................................................... 53

3.3.4 QMS Reporting............................................................................................................ 53

3.3.5 QMS Documentation.................................................................................................... 54

3.3.6 HEALTH &SAFETY MANAGEMENT SYSTEM (HSMS)................................................. 54

3.4 VARIATIONS AND ADJUSTMENTS......................................................................................... 55

4. DESIGN GENERAL REQUIREMENTS.................................................................................... 56

4.1 SYSTEM ASSURANCE REQUIREMENTS................................................................................. 56

4.2 RELIABILITY AND AVAILABILITY......................................................................................... 56

4.3 MAINTAINABILITY................................................................................................................ 56

4.4 EXPANDABILITY................................................................................................................... 57

4.5 SPARE CAPACITY.................................................................................................................. 57

5. PROCUREMENT AND CONSTRUCTION / INSTALLATION GENERAL REQUIREMENTS

58

5.1 INTRODUCTION..................................................................................................................... 58

5.2

PROCUREMENT..................................................................................................................... 58

5.3 GENERAL REQUIREMENT FOR CONSTRUCTION /INSTALLATION......................................... 58

5.4 SITE ACCESS AND CLEANLINESS.......................................................................................... 59

5.5 HAZARDOUS AREAS AND DANGEROUS SUBSTANCES.......................................................... 59

6. SCADA SYSTEM........................................................................................................................ 60

6.1 SYSTEM CONFIGURATION REQUIREMENTS.......................................................................... 60

6.1.1 MCC............................................................................................................................. 60

6.1.2 ACC.............................................................................................................................. 61

6.1.3 RTU.............................................................................................................................. 61


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6.1.4 Operating Company Terminal (OCT).......................................................................... 61

6.2 SCADASYSTEM FUNCTIONAL REQUIREMENTS.................................................................. 62

6.2.1 General......................................................................................................................... 62

6.2.2 Scalability:.................................................................................................................... 63

6.2.3 Data Acquisition and Control....................................................................................... 63

6.2.4 Custom Graphic Display.............................................................................................. 63

6.2.5 Alarms and Event Management................................................................................... 65

6.2.6 Historical Data.............................................................................................................. 66

6.2.7 Printer Management..................................................................................................... 67

6.2.8 Simulation and Training Function................................................................................ 67

6.2.9 System Security............................................................................................................ 68

6.2.10 Data Validation............................................................................................................. 68

6.2.11 Report Generation........................................................................................................ 69

6.2.12 Trending....................................................................................................................... 69

6.2.13 Human Machine Interface............................................................................................ 70

6.2.14 System Time Adjustment............................................................................................. 71

6.2.15 Interface to Other System............................................................................................. 71

6.2.16 Integration with other applications............................................................................... 71

6.2.17 Cyber-security.............................................................................................................. 71

6.2.18 Pipeline Operations Application Software................................................................... 72

6.3 SCADASYSTEM EQUIPMENT REQUIREMENTS.................................................................... 72

6.3.1 Server............................................................................................................................ 73

6.3.2 HMI Workstations........................................................................................................ 74

6.3.3 Printers.......................................................................................................................... 75

6.3.4 WEB SERVER............................................................................................................. 75

6.3.5 LAN.............................................................................................................................. 75

6.3.6 Large Screen Monitor / Large Format Display (LFD)................................................. 78

6.3.7 UPS at Operating Company Terminal Site................................................................... 79

6.4 RTUEQUIPMENT REQUIREMENTS....................................................................................... 79

6.4.1 General......................................................................................................................... 79

6.4.2 RTU Subsystem............................................................................................................ 80

6.4.3 Digital Inputs................................................................................................................ 81

6.4.4

Digital Outputs............................................................................................................. 81

6.4.5 Analog Inputs............................................................................................................... 81


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6.4.6 Analog Outputs............................................................................................................. 82

6.4.7 Pulse Inputs.................................................................................................................. 82

6.4.8 Communications........................................................................................................... 82

6.4.9 RTU Features............................................................................................................... 83

6.4.10 RTU Enclosure............................................................................................................. 90

6.4.11 Insulation and Isolation Requirements......................................................................... 91

6.4.12 Labelling....................................................................................................................... 91

6.4.13 Terminations and Input / Output Wiring...................................................................... 91

6.4.14 I/O Connections............................................................................................................ 92

6.4.15 Status Input Requirements............................................................................................ 93

6.4.16 RTU Software Requirements....................................................................................... 93

6.4.17 Electric Power.............................................................................................................. 94

6.4.18 IS Barrier and Lightning Protection............................................................................. 94

6.4.19 Dew Condensation Prevention..................................................................................... 94

6.4.20 I/O Interface................................................................................................................. 95

6.4.21 AGA Report Standard Compatible............................................................................... 95

6.4.22 Data Link to Other Systems Using Serial Links........................................................... 95

6.4.23 Display Monitor for Process Data Monitoring............................................................. 95

6.4.24 Data Storage during Server Communication Failure................................................... 96

6.4.25 Electric Outlet for Maintenance................................................................................... 96

6.4.26 DC Power Supply Unit................................................................................................. 96

6.4.27 RTU Maintenance Terminal......................................................................................... 96

7. COMMUNICATION SYSTEM.................................................................................................. 97

7.1 System Configuration Requirements................................................................................ 97

7.1.1 General........................................................................................................................ 97

7.1.2 System Configuration............................................................................................... 100

7.2 Telecommunication Equipment Supply Details............................................................ 105

7.3 Telecommunication Equipment Service Details............................................................ 106

7.4 Terminal Points and Scope Details................................................................................. 107

7.5 Communication System Equipment Requirements...................................................... 110

7.5.1 Radio Propagation Study......................................................................................... 110

7.5.2 IP Radio Equipment................................................................................................. 111

7.5.3

Telemetry Radio Equipment................................................................................... 113

7.5.4 GPRS RADIO MODEM.......................................................................................... 115


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7.5.5 IP PBX Equipment................................................................................................... 118

7.5.6 Network System........................................................................................................ 122

7.5.7 Video Conferencing System..................................................................................... 128

7.5.7.1 General Requirements................................................................................................. 128

7.5.7.2 Technical Specification................................................................................................ 129

7.5.8 STM-1 SDH Equipment........................................................................................... 135

7.5.9 Software..................................................................................................................... 137

7.5.9.1 Integration..................................................................................................................... 137

7.5.9.2 Overall Software Requirements.................................................................................. 138

7.5.9.3 Operating System Software......................................................................................... 138

7.5.9.4 Applications Software.................................................................................................. 138

7.5.9.5 Software Upgrades....................................................................................................... 138

7.5.9.6 Maintenance Utilities................................................................................................... 139

7.5.9.7 Software Quality Factors............................................................................................. 139

8. INSTRUMENTATION REQUIREMENTS.............................................................................. 140

8.1 INTRODUCTION................................................................................................................... 140

8.2 GENERAL............................................................................................................................ 140

8.3 PRESSURE TRANSMITTERS................................................................................................. 140

8.4 TEMPERATURE TRANSMITTERS.......................................................................................... 142

8.4.1 Thermowells............................................................................................................... 142

8.4.2 Temperature Transmitter............................................................................................ 142

8.5 PICK UP SIGNAL FROM THE EXISTING TURBINE METER.................................................... 145

8.6 FLOW COMPUTER............................................................................................................... 146

8.7 LIMIT SWITCH..................................................................................................................... 150

8.8 SOLENOID VALVE............................................................................................................... 150

8.9 TUBING SYSTEM................................................................................................................. 150

8.10 ELECTRICAL JUNCTION BOX.............................................................................................. 151

8.11 INSTRUMENT STAND WITH SUNSHADE............................................................................... 152

8.12 INSTRUMENT CABLING....................................................................................................... 152

8.12.1 Serial Link or Control Bus Cable............................................................................... 153

8.13 CABLE GLANDS.................................................................................................................. 153

8.14 INSTALLATION.................................................................................................................... 153

9.

ELECTRICAL WORKS REQUIREMENTS............................................................................ 156

9.1 GENERAL REQUIREMENTS............................................................................................... 156


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9.2 POWER SUPPLY FROM EXISTING/NEW POWER SOURCE.............................................. 156

9.2.1 Master Control Centre (MCC) and Auxiliary Control Centre (ACC)........................ 156

9.2.2 RTUs.......................................................................................................................... 157

9.2.3 UPS for the Operating Company Terminal................................................................ 158

9.2.4 Communications Equipment...................................................................................... 158

9.3 TECHNICAL SPECIFICATIONS........................................................................................... 159

9.3.1 Uninterruptible Power Supply (UPS) for MCC & ACC and Demra SCADA Office159

9.3.2 Backup Battery........................................................................................................... 161

9.3.3 Solar Panel with Battery............................................................................................. 163

9.3.4 UPS for Computers installed at the Operating Company........................................... 163

9.3.5 Generator at Demra and Ashuganj............................................................................. 164

9.3.6 Emergency Generator................................................................................................. 164

9.3.7 Portable Generator for Maintenance.......................................................................... 165

9.3.8 MCB Box................................................................................................................... 165

9.3.9 Cables......................................................................................................................... 165

9.3.10 Cable Laying and Cable support................................................................................ 166

9.3.11 Lightning Protection and Tower Earthing.................................................................. 167

9.3.12 Aircraft Warning Light............................................................................................... 167

9.3.13 Earthing...................................................................................................................... 167

9.3.14 Cable Terminals......................................................................................................... 168

9.4 ELECTRIC WORKS AT MCC,AGARGAON,DHAKA,ACC,ASHUGANJ,DEMRA SCADA

OFFICE (OLD MCC)AND OTHER MTSAND RTUSITES............................................................ 168

9.4.1 Standard Codes and Regulations................................................................................ 169

9.4.2 Workmanship and Materials....................................................................................... 169

9.4.3 Samples.......................................................................................................................... 169

9.4.4

Progress of Work.......................................................................................................... 170

9.5 Material Specification...................................................................................................... 170

9.5.1 PVC Conduit................................................................................................................. 170

9.5.2 Galvanized Iron (GI) Pipe........................................................................................... 170

9.5.3 Junction, Pull and Circular Boxes.............................................................................. 171

9.5.4 Conduit/GI Pipe Bends................................................................................................ 171

9.5.5 Conduit/GI Pipe Termination and Fittings................................................................ 172

9.5.6 Conduit/GI Pipe in Floor............................................................................................. 173

9.5.7 Cable work.................................................................................................................... 173


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9.5.8 Material specification................................................................................................... 173

9.5.9 Cable Laying................................................................................................................. 175

9.5.10 Cable Trunking............................................................................................................. 177

9.5.11 EARTH CONTINUITY CONDUCTOR.................................................................... 177

9.5.12 LIGHT FITTINGS....................................................................................................... 178

9.5.13 EXHAUST FAN........................................................................................................... 178

9.5.14 DISTRIBUTION BOARD........................................................................................... 179

9.5.15 SWITCH BOARD........................................................................................................ 180

9.5.16 SOCKET/MCB/MCCB OUTLETS............................................................................ 180

9.5.17 LIGHTNING PROTECTION..................................................................................... 181

9.5.18 Air Terminal................................................................................................................. 181

9.5.19 Roof Conductor and Down Lead................................................................................ 182

9.5.20 Joints.............................................................................................................................. 182

9.5.21 Test Point....................................................................................................................... 182

9.6 SYSTEM AND SUBSTATION EARTHING................................................................ 183

9.6.1 General...................................................................................................................... 183

9.6.2 Earthing System....................................................................................................... 183

9.6.3 Earthing Mesh and Lead......................................................................................... 184

9.6.4 Earthing Block.......................................................................................................... 184

9.6.5 Earth Inspection Pit................................................................................................. 184

9.6.6 Earth Electrode......................................................................................................... 184

9.6.7 Maximum Earth Loop Resistance.......................................................................... 185

9.7 Control Panel ................................................................................................................. 186

9.7.1 Construction.............................................................................................................. 186

9.7.2 Control Panel - Internals......................................................................................... 186

9.7.3 Control Panel - Front Face...................................................................................... 186

9.7.4 Control Panel - Lamp Indications........................................................................... 187

9.7.5 Control Panel - Audible Alarm............................................................................... 187

9.7.6 Overall Testing......................................................................................................... 188

9.8 INSPECTION................................................................................................................... 188

9.8.1 General...................................................................................................................... 188

9.8.2 Visual Inspection...................................................................................................... 188

9.9

TESTING.......................................................................................................................... 188

9.9.1 General...................................................................................................................... 188


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9.9.2 Continuity of Final Circuit...................................................................................... 189

9.9.3 Continuity of Protective Conductors...................................................................... 189

9.9.4 Earth Electrode Resistance...................................................................................... 189

9.9.5 Insulation Resistance................................................................................................ 189

9.9.6 Insulation of Site-Built Assemblies......................................................................... 190

9.9.7 Electrical Separation of Circuits............................................................................. 191

9.9.8 Protection Against Direct Contact by Barriers or Enclosures............................. 191

9.9.9 Insulation of Non-Conducting Floors and Walls................................................... 191

9.9.10 Polarity...................................................................................................................... 192

9.9.11 Earth Fault Loop Impedance.................................................................................. 192

9.9.12 Earth Continuity Conductor................................................................................... 192

9.9.13 Operation of Residual Current Operated Devices................................................ 192

9.10 Air Condition Unit............................................................................................................ 192

10. CIVIL WORKS REQUIREMENTS...................................................................................... 194

10.1 GENERAL INFORMATION.................................................................................................... 194

10.1.1 Introduction................................................................................................................ 194

10.1.2 Scope of Work............................................................................................................ 194

10.1.3 General Requirements................................................................................................ 195

10.2 FOUNDATIONS &SUNSHADES FOR EQUIPMENT................................................................. 196

10.2.1 General....................................................................................................................... 196

10.2.2 Requirements.............................................................................................................. 197

10.3 REFURBISHMENT OF RADIO ROOMS /BUILDINGS.............................................................. 197

10.3.1 General...................................................................................................................... 197

10.3.2 Requirements............................................................................................................ 199

10.4 CIVIL WORKS SPECIFICATIONS OF MCC............................................................................ 200

10.4.1 The specifications for civil works of MCC shall be as under:................................... 200

10.4.2 Civil Works for MCC............................................................................................... 200

10.4.3 Civil Works for ACC and Demra SCADA Office (Old MCC)............................. 202

10.4.4 Air Conditioning Works for MCC,ACC and Demra SCADA Office.................. 203

10.4.5 Office Furniture and Equipment of MCC ,ACC and Demra SCADA Office.... 203

10.4.6 Electrical Works....................................................................................................... 208

10.4.6.1 General................................................................................................................. 208

10.5

REFURBISHMENT OF CONTROL CENTERS........................................................................... 210

10.6.1 General...................................................................................................................... 210


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10.5.2 Requirements............................................................................................................ 210

10.6 REFURBISHMENT OF THE ANTENNA MASTS /TOWERS...................................................... 211

10.6.1 General...................................................................................................................... 211

10.6.2 Painting...................................................................................................................... 211

10.6.3 Requirements............................................................................................................ 211

10.7 Tower/ Mast Foundations............................................................................................ 212

10.7.1 Civil Works for Foundations................................................................................... 212

10.7.1.1 Earthing................................................................................................................. 213

10.7.1.2 Tests....................................................................................................................... 213

10.8 RADIO /RTUROOMS.......................................................................................................... 214

10.8.1 General...................................................................................................................... 214

11. INSPECTION AND TESTING............................................................................................. 216

11.1 GENERAL............................................................................................................................ 216

11.2 TEST EQUIPMENT AND FACILITIES..................................................................................... 217

11.3 TESTS.................................................................................................................................. 217

11.3.1 Factory Acceptance Test (FAT)................................................................................. 217

11.3.2 Site Acceptance Test (SAT)....................................................................................... 218

11.3.3 Commissioning Test................................................................................................... 219

11.3.4 Final System Test....................................................................................................... 219

12. OPERATION AND MAINTENANCE SUPPORT AND SPARE........................................ 221

12.1 INTRODUCTION................................................................................................................... 221

12.2 OPERATION SUPPORT......................................................................................................... 221

12.2.1 General....................................................................................................................... 221

12.2.2 Qualifications and Experience.................................................................................... 221

12.3 MAINTENANCE PHILOSOPHY.............................................................................................. 221

12.4 DESIGN TO FACILITATE MAINTENANCE............................................................................. 222

12.5 SPARE PARTS...................................................................................................................... 222

12.6 MAINTENANCE CONTRACTS............................................................................................... 224

12.6.1 General....................................................................................................................... 224

12.6.2 Routine Maintenance.................................................................................................. 224

12.6.3 Hardware Remedial Maintenance.............................................................................. 225

12.6.4 Software Remedial Maintenance................................................................................ 225

12.6.5

Consumables.............................................................................................................. 226

13. IDENTIFICATION, MARKING, PACKING AND STORING........................................... 227


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14. TRAINING............................................................................................................................. 228

14.1 INTRODUCTION................................................................................................................... 228

14.2 GENERAL COURSE REQUIREMENTS................................................................................... 228

14.3 CATEGORIES OF PERSONNEL REQUIRING TRAINING.......................................................... 228

14.3.1 General....................................................................................................................... 228

14.3.2 Managers.................................................................................................................... 228

14.3.3 Engineers.................................................................................................................... 228

14.3.4 Operators.................................................................................................................... 229

14.3.5 Technicians................................................................................................................. 229

14.3.6 Trainers....................................................................................................................... 229

14.4 TRAINING &SUPPORT SERVICES..................................................................................... 229

14.4.1 Free Maintenance Training on all equipment covered:.............................................. 229

14.4.2 Training Schedule:..................................................................................................... 230

14.4.3 Training course Requirement:.................................................................................... 230

14.4.4 Data base and Display building course:..................................................................... 230

14.4.5 SCADA & RTU Course:............................................................................................ 230

14.5 TRAINING REQUIREMENTS................................................................................................. 231

14.5.1 Location and Methodology......................................................................................... 231

14.5.2 Training Course during Installation and Commissioning........................................... 231

14.5.3 Training Course Structure for Operation & Maintenance.......................................... 231

15. PRICE BREAK UP AND EQUIPMENT LIST..................................................................... 235


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TECHNICAL SPECIFICATION :PART 2

SECTION VI. EMPLOYERS REQUIREMENTSLIST OF ATTACHMENTS

ATTACHMENT :BID PROPOSAL SHEETS -TECHNICAL

Appendix 1 : Site List of Microwave and Telemetry links

Appendix 2 : Void

Appendix 3 : RTU List

Appendix 4 : RTU I/O List

Appendix 5 : Instrument List

Appendix 6 : Project Implementation Schedule

Appendix 7 : Existing SCADA System

Drawings :

Fig 1.1 : GTCL SCADA System-Location Layout Drawing

Fig 1.2 : Proposed SCADA System Architecture Drawing

Fig 1.3 : Typical GPRS Radio Modem Link Primary Communication Network

Fig 1.4 : Communication Link between Chevron Compressor System at Muchai and

GTCL SCADA Server at MCC & ACC

Fig 1.5 : Typical Communication link between GTCL SCADA Server and Operating

Company Terminal

Fig 1.6 : Access link between GTCL SCADA Server and Compressor system at Elenga /

Ashugonj

Fig 1.7 : Communication link between Bakhrabad Siddhirganj SCADA and GTCL

SCADA

Fig 1.8 : Communication link between GTCL SCADA Server and GTCL ERP System

Fig 1.9 : Communication link between Western Zone SCADA System at Elenga and MCC /

ACC

Fig 1.10 : Void

Fig 1.11 : FOC based Access link between MTS and Access Points

Fig 1.12 : Access link between MTS and Access Point based on Radio

Fig 7.1 : Leased E1 Circuits

Fig 7.2 : SCADA Backbone Diagram

Fig 7.3 : Typical Telemetry Radio Link Secondary Communication Network

Fig 7.4 : IP PBX System

Fig 9.1 to Fig 9.4 : Power Supply Single Line Diagrams

Fig 10.1 : Instrument Stand with Foundation and Sunshade


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SECTION VI. EMPLOYERS REQUIREMENTSABBREVIATIONS &DEFINITIONS

ABBREVIATIONS &DEFINITIONS

Abbreviations

ACC : Auxiliary Control CenterADB : Asian Development Bank

BGFCL : Bangladesh Gas Field Co., Ltd.

BGDSL : Bakhrabad Gas Distribution System Ltd.

CGS : City Gate Station

DRS : District Regulating Station

FAT : Factory Acceptance Test

FF : Fertilizer Factory

GMS : Gas Manifold StationGTCL : Gas Transmission Co. Ltd.

HO : Head Office

IP-PBX : Internet Protocol Private Branch Exchange

IOC : Independent Operating Companies

JICA : Japan International Cooperation Agency

JGTDSL : Jalalabad Gas Transmission & Distribution System Limited

KGDCL : Karnaphuli Gas Distribution Company Limited

MCC : Main Control CenterMS : Metering Station

MTS : Master Telemetry Station

NMS : Network Monitoring System

OCT : Operation Company Terminal

PS : Power Station

RMS : Regulating & Metering Station

RTU : Remote Terminal Unit

SAT : Site Acceptance TestSCADA : Supervisory Control and Data Acquisition

SGFL : Sylhet Gas Field Limited

STS : Slave Telemetry Station

TBS : Town Bordering Station

TGTDCL : Titas Gas Transmission & Distribution Co. Ltd.

UPS : Uninterruptible Power Supply

VS : Valve Station

WB : World Bank


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SECTION VI. EMPLOYERS REQUIREMENTSABBREVIATIONS &DEFINITIONS

Definitions

Access Point : Providers network station where Master Telemetry Station of theNew System shall be linked with.

Additional Site : Existing site which is currently not covered by The Existing Systembut shall be covered by the New System.

Employer : Gas Transmission Company Limited (GTCL)

Future Site : Upcoming site which is planned to be added into The New Systemafter the completion of the Project.

Master Telemetry Station : The radio station which communicate with its associated NewRTU(s) and Control Centre as relay station.

Original Site : Existing site which has been covered by The Existing System, andshall be covered by The New System.

Project : Detail design, procurement, construction, installation,commissioning and training for the rehabilitation and expansion ofThe Existing System.

Site : Place where gas pipeline related facilities are or will be situated.

Slave Telemetry Station : The local radio station installed with New RTU that communicateswith Master Telemetry Station.

Study : All activities by experts selected by JICA to examine therequirement for the rehabilitation and expansion of The ExistingSystem and to formulate a detailed future investment plan for theefficient gas transmission inclusive of training for transfer oftechnical know-how.

The Engineer : Consultant to supervise the tendering stage and the implementationof the Project, as representative of Employer.

The Existing System : Existing SCADA and Telecommunication System which had beenpreviously installed and shall be rehabilitated during the Project.

The New System : New SCADA and Communication System which shall beestablished in the Project.


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- 1- GENERAL REQUIREMENTS

1. GENERAL REQUIREMENTS

1.1 INTRODUCTION

(1) This document is the Functional and Performance Specification for 'Gas SCADASystem Rehabilitation and Expansion Project' for GTCL in Bangladesh and form Part-2,

Section-VI of the Invitation to Tender for the said Project.

(2) Gas Transmission Company Ltd. (GTCL), Bangladesh is the Employer for this Contractwho own, control, operate and maintain the high pressure gas transmission trunkpipelines that shall be covered by New SCADA and Communication System.

(3) The purpose and objective of the project for Rehabilitation and Expansion of ExistingSupervisory Control and Data Acquisition (SCADA) of GTCL is to revamp, modernizeand expand the SCADA system of the country-wide GTCL gas pipeline network tobuild an integrated SCADA-Communication system as a functional organ of Employerto monitor and ensure a stable gas supply system and to secure efficient and effective

gas distribution to the whole country.

(4) The Project is implemented under Japan's ODA (Official Development Assistance) loan.

1.2 BACKGROUND INFORMATION

The existing gas SCADA-Telecommunication system operated by GTCL was installed under

DFID (Department for International Development, UK Government) assistance during 1996-2003 for the efficient operation and monitoring of gas supply in Bangladesh. However, it iscurrently malfunctioning due to the following major problems.

(1) Since the installation of the Existing System, there has been a significant growth in thegas sector. New gas fields have started production and new gas off-take points havebeen connected. However, no expansion of the Existing System has taken place and allnewly developed gas sites have remained outside the coverage of the Existing System.

(2) Due to the lack of maintenance support from the Contractor after the expiry of operation& maintenance support service period, the Existing System has become old anddilapidated.

(3) Microwave analog communication system of TGTDCL, which was used as thebackbone of the Bramaputra Basin pipeline from Monohordi to Elenga and Tarakandi,has become antiquated.

(4) Existing System, designed in 1995, is fast approaching the final stage of its lifetime. The

equipment / parts used for the system have become generation/s older and theprocurement of spare parts has become difficult, affecting maintenance work seriously.

(5) Existing SCADA and Telecommunication system was designed, manufactured andimplemented by Schrack Control and Granger telecommunication.

Bangladesh gas sector has since expanded to achieve the vision of 2025 with manyexpansion / extension gas pipeline projects, to meet the strong future gas demandforecast.

In tune with the above, an integrated SCADA telecommunication system will be built upthrough Rehabilitation and Expansion of Existing Supervisory Control and Data

Acquisition (SCADA) system of GTCL which in turn will realize the effective and


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sustainable gas supply to the whole country.

1.3 PROJECT DESCRIPTION

1.3.1 Introduction

(1) This chapter provides information on the Project, the Employer, other operatingcompanies and the sites at which new SCADA and Communication System are to beinstalled.

(2) The Contractor shall provide new SCADA and Communication System throughrehabilitation and expansion of the existing SCADA and Telecommunication Systemfor effective operation / control of the nationwide gas pipeline network.

(3) The New System shall be implemented through a turnkey EPC (Engineering,Procurement and Construction) Contract according to the requirements specified in this

document.

(4) The New System shall consist of new RTUs & new SCADA Systems, newCommunication systems, new UPS systems, new Battery & Charger systems, new solar

systems for non AC powered sites, new field Instruments etc. specified in thisdocument.

(5) The New System shall provide the Employer with a unified voice and datacommunications system to support their operations including but not limited to thefollowing:

a) Monitoring of gas parameters at specified sites.

b) On-off Control of automatic gas flow control valves either remotely or in localmanual mode.

c) Planning of optimum and strategic use of gas in accordance with gas productionand consumption.

d) Fault identification and diagnosis of the gas network.

(6) The Specification has been based on conceptual design to allow the requirements to beadequately addressed by EPC Contractor. The detail design in terms of the Systemarchitecture and configuration shall be the responsibility of Contractor in accordancewith the functional and performance requirements described in the Specifications.

1.3.2

Design Outline

The new SCADA system shall allow information to be easily shared between computer

systems and applications through open system design architecture. The system shall also

make it possible to support modular applications such as graphical display, alarming, logical

functions, analysis and data handling operations and shall communicate with enterprise or

external systems over network. Sharing of data should be permissible through web based

browsers as well as standard client viewers.

Design of the new SCADA system shall incorporate the state-of-the-art technologies for

enhanced performance and / or to maximize the reliability and availability of the system with

flexibility to ensure ease, safe operation and maintenance.


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1.3.3 Design Philosophy

(1) The scope of the Project will include but shall not be limited to the following:

a) To manufacture, procure, supply, install, and commission an integrated SCADA,Communication and Field Instruments system including associated Civil andElectrical works for GTCL Gas Transmission Pipeline Network as follows:

i] Removal and Replacement of the SCADA-Communication system, Fieldinstruments, Process hook up materials and all other associated accessories& erection materials of existing systems by Contractors new equipment &materials.

Existing MTS Towers and existing field instrumentation cables, structures,

shed/shelter (for Instruments & RTUs etc.), foundations, radio rooms (forMTS, Instruments & RTUs) are structurally in good condition, howeverpainting, earthing, refurbishment of shelter, refurbishment of foundation,

and any other refurbishment works as required shall have to be provided.New cables shall be employed to replace defective cables, if any, and tomeet requirement for new sites.

ii] Dismantling of existing RTUs, SCADA system equipment,Communication systems equipment and Field instruments.

iii] Provide new systems into existing sites which were not covered by theExisting System. In such case, all necessary items, to meet completefunctional requirement of SCADA-Communication system, instrument,cables & accessories, shed / shelter construction, other associated civil andElectrical works required for new system, shall be provided.

iv] Expanding the system to include upcoming sites such as those underconstruction or being planned. In this case, similar to case (iii) above, allitems to meet complete requirement of SCADA-Communication system,instrument, cables & accessories, shed / shelter construction, otherassociated civil and Electrical works as required for new system shall beprovided.

v] Interface & connections to other zonal gas SCADA Systems, third partyERP systems of GTCL and to other Automation system operated by IOCs.

b) To assist GTCL with the establishment of a sustainable Operation andMaintenance (O&M) system by :

i] Imparting Training on the development of skills and expertise for GTCLrelated personnel for smooth commencement of the New System and itssustainable O&M including framing of an Annual Maintenance Contract.

ii] Prepare and submit the O&M manuals and O&M schedules.

(2) The New System will be designed in accordance with the same operational philosophyfor pipelines as the one currently being used for the Existing System.

(3) The New System shall support the following functional requirements :

a) Centralized control and operation of the pipelines based on latest communication

technology with upward up-gradation path.


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b) Management of the countrys gas resources and security of supply to consumers.

c) Improvement of the safety of operation of the pipelines.

d) Development of the skills and expertise of GTCL personnel.

e) Support the future expansion of the pipeline network.

(4) All main components of the Existing System, such as servers, workstations, RTUs,communication equipment, field instruments etc. are to be replaced with new one. Theexisting field cabling, junction boxes and power supply cabling to RTU may be reusedwhere these are found to be in good condition.

(5) All the existing Fifty four (54) Remote Terminal Units of GTCL need total replacementby new generation sleek, smart and fast RTUs. In addition Thirty two (32) new RTUsneed to be installed for the additional new nodes that are yet to be brought into thecoverage of the SCADA network. Also, two (2) new RTUs are to be kept in readiness

for upcoming future sites. Over the existing capacity the SCADA network shall bedesigned with higher capacity and traffic to accept future nodes.

(6) The SCADA system and communication network shall be of state-of-the-art designwith the scope of upward advancement.

(7) Air conditioners installed in the Control room, Equipment room and UPS & Batteryroom in MCC and ACC are of split architecture design. Air conditioner for Radio roomshall be window type. All the above air conditioners shall be replaced.

(8) All design and construction works shall be prepared and carried out in accordance withBritish Standards & codes of practice or any other recognized equivalent national

standards like ANSI, ASME, IEC, IEEE, ISO, DIN approved by the Engineer. Anydeparture from these standards and codes shall be subject to approval by the Engineer.

Contractor shall be able to present the copies of the referred standard and codes ofpractice at the request of the Engineer.

(9) All works shall be carried out in accordance with recognized standards of Environment,Health & Safety (EHS) British Standards / American Concrete Institute (ACI) Codes /Bangladesh National Building Code (BNBC) or equivalent. The Engineer shall have thepower to instruct the Contractors EHS officer to comply with the codes requirements.

(10) EPC Contractor shall be responsible for the complete design and design check of the

Works which shall be submitted to the Engineer for approval.

(11) The Contractor shall ensure that the submitted design is adequate in all respects forproper functioning of the System.

(12) The Contractor shall submit the Method Statement for the works that describes themethod & sequence of the construction work, work plan, quality assurance, referredstandards and codes of practice etc. for the approval of the Engineer.

(13) For any deviation from the approved specification and quality, the Engineer will havethe authority to instruct the Contractor to reinstate such work to the required standard.


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(14) The Contractor shall arrange suitably qualified competent Engineers at site to supervisethe work and shall ensure that the quality and progress of the works is achieved andmaintained. The site engineers shall be responsible for liaising with the Engineer.

(15) As a part of the Quality assurance and Quality check, Contractor's engineers shallinspect and test the works to ensure that all works are done as per approved design,standard and specification and shall submit the records of such inspections and tests tothe Engineer for approval.

(16) The Contractor shall also ensure that progress is maintained in accordance with thework schedule.

(17) The Contractor shall coordinate with all agencies including the operating companies ofgas facilities where Contractor's works shall be carried out and ensure no disturbance tothe operations of existing gas facilities and also ensure no damage to the existing gasfacilities.

1.3.4

Project Geography

(1) Gas development in Bangladesh is mostly restricted to the eastern half of the country.

(2) Bangladesh is a predominantly a flat country with the presence of hilly areas being inthe Sylhet region starting at Hobigonj and in the south-east of Chittagong.

(3) Prominent natural resource is water. The lands are being dominated by rivers and deltas.Many parts of the Bangladesh are a flood prone zone.

(4) Other geographical features are the high probability of extreme climatic and

meteorological conditions including prolonged periods of high temperature andhumidity, thunder storms and cyclones and a monsoon season.

(5) Bangladesh has three seasons; winter, between November and February which is dryand cool, the pre-monsoon season between March and May which exhibits increasingtemperatures and periodic thunderstorms and increasing rainfall and the monsoonseason itself from June to October which is warm and humid and in which more than80% of the annual rainfall occurs.

(6) Bangladesh has a typical monsoon climate characterized by rain-bearing winds,moderately warm temperatures and high humidity. In general, maximum temperaturesare recorded in the summer months, from April to September, averaging 90 deg. F (30

deg.C). April is the warmest month in most parts. The range of temperatures in thewinter months, from November to March, is lesser than in the summer months. Januaryis the coolest month, with temperatures averaging 70 deg.F (20deg.C).

(7) The conditions of lowest atmospheric pressure occur in Bangladesh in June and July, thestorm season. Winds are mostly from the north and northeast in winter, blowing gentlyin northern and central areas and somewhat more aggressively near the coast. Duringthe period of the northwesters (strong winds from the northwest) from March to May,however, wind speed may rise to 40 miles (65 km) per hour.

(8) Bangladesh receives heavy rainfall; except for some parts in the west, it generallyexceeds 60 inches (1,500 mm) annually. Large areas of the south, southeast, north, and

northeast typically receive from 80 to 100 inches (2,000 to 2,500 mm), and the northern


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and northwestern parts of the Sylhet area usually receive from 150 to 200 inches(~3,800 to 5,000 mm). The maximum rainfall occurs during the monsoon period, fromJune to September or early October.

(9) Such conditions have a direct impact on the transport infrastructure within Bangladeshwith some roads becoming temporarily impassable or washed away in sections.

(10) The Contractor shall study the geographic and climatic conditions of Bangladesh andaddress them in all areas of the System design.

(11) The Contractor shall consider the geographical, meteorological and environmentalconditions in the Project Plan and demonstrate that sufficient contingency has beenincluded to ensure the program is both realistic and achievable.

(12) All the equipment supplied under contract shall be suitable for continuous operationunder the environmental conditions prevailing at site. The equipment shall be suitable

for transportation under proper packed conditions by road, air, sea, conforming tostandards. The equipment shall also be resistant to termite, fungus, rodents and saltyenvironment. The equipment shall withstand continuous ambient temperature up to 60deg. Centigrade, and humidity from 5 to 95% RH (non-condensing). All enclosed

equipment shall be constructed to allow free air flow for proper heat dissipation, andventilation grill shall not obstruct operation and maintenance of equipment. Allequipment shall withstand international standards for vibration under industrialoperation.

1.3.5 Petrobangla and the Employer

(1) The gas sector in Bangladesh is a public utility and run semi-autonomously by

Petrobangla under Ministry of Power, Energy and Mineral Resources. Petrobangla'sHead Office is located in Dhaka.

(2) The Employer, GTCL, is an operating company of Petrobangla which owns andoperates the Bangladesh National Gas Grid and responsible for the transmission of gasfrom gas fields to distributors.

1.3.6 Operating Companies

There are several Operating Companies. Sites of those companies are to be monitoredby the New System and their main activities are described below.

(1) Bakhrabad Gas Systems Limited (BGSL)

a) BGSL is a company of Petrobangla and is engaged in the gas distribution withinthe southeastern part of Bangladesh covering Chittagong Division excludingBrahmanbaria District.

b) The Employer supplies gas to BGSL sites.

c) BGSL's head office is located in Comilla where new OCT and extensiontelephone shall be installed.

(2) Jalalabad Gas Transmission and Distribution Company Limited (JGTDCL)


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a) JGTDSL is a company of Petrobangla and is engaged in the gas transmission anddistribution within the northeastern part of Bangladesh covering Sylhet Division.

b) The Employer supplies gas to JGTOSL sites.

c) JGTDSL's head office is located in the commercial building on the outskirts ofSylhet where a new OCT and extension telephone shall be installed.

(3) Titas Gas Transmission and Distribution Company Limited (TGTDCL)

a) TGTDCL is a company of Petrobangla and is engaged in the gas transmission anddistribution within the central and northern part of Bangladesh covering DhakaDivision and Brahmanbaria District.

b) The Employer supplies gas to TGTDCL sites.

c) TGTDCL's head office is located in Dhaka where a new OCT and extensiontelephone shall be installed.

(4) Bangladesh Gas Field Company Limited (BGFCL)

a) BGFCL is a company of Petrobangla who owns and operates several gas fields inthe districts of Brahmanbaria, Comilla, Hobigonj, Narsingdi and Gazupur. Gas issupplied to the Employer and also directly to TGTDCL.

b) BGFCL's head office is located in Brahmanbaria where a new OCT and extensiontelephone shall be installed.

(5) Sylhet Gas Fields Limited(SGFL)

a) SGFL is a company of Petrobangla who owns and operates several gas fields inSylhed Division. Gas is supplied to the Employer.

b) SGFLs head office is located at Horipur gas field, Sylhet where a new OCT andextension telephone shall be installed.

(6) BAPEX: A Company of Petrobangla responsible for drilling gas fields and operation ofseveral gas fields.

(7) Karnafuli Gas Distribution Company Ltd. (KGDCL)

KGDCL is a company of Petrobangla and is engaged in the Gas distribution coveringChitagong.

(8) Other Companies

There are some other companies operating or constructing gas facilities which shall becovered by the new SCADA System such as

a) Chevron : International Oil Company operating three gas fields in SylhetDivision.

b) Tullow : International oil company operating a gas field in Comilla District.


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1.3.7 The National Gas Grid

(1) Sections of the national gas grid that shall be covered by The New System are indicatedin Figure l.

1.3.8 Site Description

(1) Introduction

There are several classifications of sites which are defined below. The Site List(Appendix-1) identifies the classification of each site to be included in The NewSystem.

(2) Control Center (CC)

a) Master Control Centre (MCC): MCC will be located at GTCL Head office,

Agargaon, Dhaka.

b) Auxiliary Control Centre (ACC): The Auxiliary Control Center (ACC) of theNew System is located at Ashuganj approximately 90 km northeast of Dhaka.

c) Demra SCADA Office: Demra SCADA office is located at about 20 km southeast of Dhaka. Master Control Center (MCC) of the earlier SCADA System wasinstalled here. Now HMI Engineering work station and OCT will be installed hereunder the new SCADA system. Servers of Bakrabad-Siddirgonj, SCADA back-up

Server of Western zone SCADA and back-up server of ERP system of GTCL arelocated here.

d) Both Control Centers enable the Employer to supervise and control the entire gaspipeline network converged by the New System.

(3) Master Telemetry Station (MTS)

There are 20 Master Telemetry Stations out of which 11 stations will be operational and

will communicate with their associated New RTU(s) and Control Center as relaystation. The existing radio equipment rooms and towers shall be utilized for MTS.

(4) Gas Metering and Regulating Station

a) There are dozens of gas metering & regulating stations to be monitored by theNew System under different classifications as below.

GMS : Gas Manifold Station

CGS : City Gate Station

TBS : Town Bordering Station

RMS : Regulating & Metering Station

DRS : District Regulating Station

CMS : Customer Metering Station

MS : Metering Station


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b) The New System shall monitor the gas flow volume at these sites.

(5) Gas Field

a) There are 20 Gas fields to be incorporated in the New System.

b) The New System shall monitor the inlet gas volume from these sites.

(6) Bulk Consumers

a) Power stations (PS) and fertilizer factories (FF), which are the largest consumersof gas in the industrial sector, are defined as bulk consumers to be monitored bythe New System.

b) The New System shall monitor the outlet gas volume feeding the bulk consumers.

(7) Main Line Valve Stations (VS)

a) There are dozens of main line valve stations (VS) to be monitored by the NewSystem.

b) The New System shall monitor the open / close status of these valves. Furthercontrol these valves shall be provided.

(8) Petrobangla and Operating Companies' Head Office

The head office of Petrobangla and other major operating companies shall be equippedwith an Operating Company Terminal (OCT) and extension telephone for the

monitoring of the entire gas grid covered by the New System and for internal/directliaison.

1.3.9 Gas Pipeline Operation Philosophy

(1) The Employer will receive requests from distribution companies for the supply of gas attheir designated sites on a periodical basis.

(2) The Employer will also establish the levels of gas to be provided to the National GasGrid by production companies on a regular basis.

(3) The Employer will plan for the transmission of gas through the National Gas Grid in

accordance with the demand as put forward by "distribution companies under theircontract with the production companies.

(4) The Employer will provide figures for the quantity of gas flowing into and out of theNational Gas Grid to Petrobangla and the other Operating Companies to support billingand payment for gas and other financial systems such as periodic accounts or planning.

(5) Proposed SCADA system shall cover the following main transmission pipe lines:

a) North - South Pipeline

b) Rashidpur - Ashuganj

c) Ashuganj - Bakhrabad pipeline


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d) Bakhrabad - Demra pipeline

e) Bakhrabad - Chittagong pipeline

f) Norsignhdi-Demra

g) Ashuganj - Monohordi - Elenga pipeline (BB Pipeline)

h) Elenga - Tarakandi pipeline

i) Dhanua - Ashulia Aminbazar

j) Bibiyana-Dhanua pipeline

k) Moheskhali-Anowara pipeline

(6) Recently Bibiyana-Dhanua pipeline has been added to gas transmission network ofGTCL and some pipe lines like Asuganj - Bakhrabad-2 and Maheshkhali - Anawara willbe added very soon. In order to accommodate monitoring of those pipelines; few RTUs,associated communication equipment and field instruments need to be arranged from

other sites which are of less priority.

1.4 INTENDED PURPOSE OF THE NEW SYSTEM

1.4.1 SCADA System

(1) The intended purpose of the SCADA System is to ensure for GTCL that the natural gastransmission pipeline is:

a) Capable of being operated and maintained safely, effectively and efficiently.

b) Equipped with operational interfaces that will enable the efficient monitoring and

control of the natural gas transmission pipeline from both of the Master ControlCenter (MCC) and the Auxiliary Control Center (ACC).

(2) The SCADA System shall permit data acquisition and control functions to be performedat remote locations while providing the capability to monitor and control distributed

functions from MCC and ACC.

(3) The Master Control Center (MCC) shall be the central operating center to monitor andcontrol the pipeline network.

(4) The Auxiliary Control Center (ACC) shall be the hot-standby operating center with thesame functionality and operating capability as the MCC.

1.4.2 Communication System

The intended purpose of the Communication System is to:

(1) Acquire data from remote sites and send the aggregated data to Master Control Centreand Auxiliary Control Centre for monitoring and supervisory actions and for generatingoutputs for management use.

(2) Provide adequate communication ability, ensuring that the GTCL natural gastransmission pipeline is capable of bein