1007 disq 0 p ss 48080 sales gas metering package specification

8/9/2019 1007 DISQ 0 P SS 48080 Sales Gas Metering Package Specification

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Contract

Number: 1007

File Reference

1007-DISQ-0-P-SS-48080-Rev.3

Page

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RWE Dea

Disouq Field Development

FEED

Specification

Sales Gas Metering Package

A-5401

Document number

1007-DISQ-0-P-SS-48080

3 10.05.12 Issued for Design A Saleh A Fawzi A Hamdan RWE

2 08.02.12 Re-Issued for Approval A Saleh A Fawzi A Hamdan RWE

1 26.01.12 Issued for Approval A Saleh /

A Khamisy A Fawzi A Hamdan RWE

0 11.12.11 Issued for Client comment A Saleh /

A Khamisy A Fawzi A Hamdan RWE

Rev Date Description Issued By Checked By Approved

ByClient

Approval


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Onspec Engineering Solutions

Disouq Field Development Project

Specification


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Changes List

Rev.

Dateprepared

(DD.MM.YYYY)

Prepared by Description

1 26.01.12 A Saleh /

A KhamisyClient Comments incorporated

2 08.02.12 A Saleh Client Comments incorporated

3 10.05.12 A SalehGASCO requirements’ and client commentsincorporated


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Table of Contents

1 Introduction ....................................................................................................................6

1.1

Background ................................................................................................................6

1.2 Purpose of Document .................................................................................................7

2

Referenced Documents .................................................................................................7

2.1 Project Documentation ...............................................................................................7

2.2 International Codes and Standards ............................................................................9

2.3 Order of Precedence ................................................................................................ 13

3

Package Components .................................................................................................. 14

3.1

Inlet / Outlet Pipe Spools and Interconnecting Piping ............................................... 15

3.2

Sales Gas Filter ........................................................................................................ 15

3.3 Metering Module ....................................................................................................... 16

3.3.1

Ultrasonic Meter .................................................................................................... 16

3.4 Metering System ...................................................................................................... 18

3.4.1 Multi-stream Flow Computer ................................................................................. 19

3.4.2 Supervisory Computer .......................................................................................... 19

3.4.3

Operator Work Station .......................................................................................... 19

3.4.4

Instrumentation Panel ........................................................................................... 20

3.4.5 Secondary Devices ............................................................................................... 20

4 Extent of Supply ........................................................................................................... 21

4.1 Inclusions ................................................................................................................. 21

4.2

Exclusions ................................................................................................................ 22

4.3 Battery Limits ............................................................................................................ 22

5 Design Requirements ................................................................................................... 24

5.1 Basic Design Data .................................................................................................... 24

5.2

Piping, Flanges, Gaskets and Bolts .......................................................................... 26

5.3 Painting .................................................................................................................... 26

5.4

Skid Assembly .......................................................................................................... 27

5.5 Metering System Design Requirements .................................................................... 27

5.5.1

Transient, Static and RFI Protection ...................................................................... 27

5.5.2 Cabinet Design ..................................................................................................... 28

5.6

System Software Design Requirement ..................................................................... 28

5.7 Noise Limitations ...................................................................................................... 29


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5.8 Utilities ...................................................................................................................... 29

5.9 Material Certificate to Conformance (C&C)& Traceability ......................................... 29

5.10

Name plates ............................................................................................................. 29

5.11 Climate Condition ..................................................................................................... 30

6

Electrical Requirements ............................................................................................... 30

6.1 General .................................................................................................................... 30

6.2 Power Supply Voltages ............................................................................................ 30

6.3 Hazardous Area Requirements................................................................................. 30

6.4

Certifying Authorities ................................................................................................ 30

6.5

Ingress Protection for Electrical Equipment .............................................................. 30

6.6

Cabling ..................................................................................................................... 31

6.7 Equipment Earthing & Bonding ................................................................................. 31

7

Installation, Operation and Maintenance ...................................................................... 32

7.1 Installation, Pre-commissioning and Commissioning ................................................ 32

7.1.1 Start-Up, Pre-commissioning and Commissioning Services .................................. 32

7.2 Maintainability ........................................................................................................... 32

7.3

Calibration ................................................................................................................ 33

7.3.1

Ultrasonic Meters Calibration ................................................................................ 33

7.3.2 Secondary Devices ............................................................................................... 33

7.4 Special Tools ............................................................................................................ 33

7.5 Spare Parts .............................................................................................................. 33

7.6

Training .................................................................................................................... 34

7.6.1 Training Philosophy .............................................................................................. 34

7.6.2 Training Course Documentation ............................................................................ 34

7.6.3 Operator Training Course ..................................................................................... 34

7.6.4

Maintenance Training Course ............................................................................... 34

7.6.5 System Configuration Course ............................................................................... 34

7.6.6

Training Aids ......................................................................................................... 34

8 Preparation for Shipment ............................................................................................. 35

9

Quality Assurance & Health, Safety and Environment .................................................. 35

9.1 QC Factory Acceptance Test (FAT) .......................................................................... 35

9.2

QC System Integration Test (SIT) ............................................................................. 37

9.3 QC Site Acceptance Test (SAT) ............................................................................... 37


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1 Introduction

1.1 Background

RWE Dea Egypt has discovered seven natural gas reserves in the Disouq Concession withinthe onshore Nile Delta, starting in 2008, as shown on the concession map below. Furtherexploration in the concession is on-going. RWE Dea Egypt is the operator of the Concessionwith EGAS as a partner.

The selected development comprises a central gas treatment plant near NSG-1x, where thegas is collected, treated by means of Low Temperature Separation utilizing the Joule Thomson

effect to achieve sales gas quality, and compressed for export. Sales gas is transferred via a16” pipeline directly into the GASCO NTS pipeline.

The well fluids are gathered and fed to a common inlet separator at the central plant. All gasesand liquids will be separated and processed on the central treatment plant into sales gas,stabilized condensate, and free production water.

Treatment of gas is carried out in two trains, while treatment of condensate is in a single train.Three trains of gas compression and three metering streams shall be installed. Fuel gas forthe gas engine driven main power generators will be taken from the suction of the gascompressors upstream of the sales gas metering package.


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1.2 Purpose of Document

This Specification defines the minimum technical requirements for the design, materialspecification, fabrication, assembly, QC inspection, QC testing and preparation for shipment ofa fiscal / custody transfer Sales Gas Metering Package to be installed on the CentralTreatment Plant as part of the Disouq Field Development Project.

The Sales Gas Metering Package shall be designed and supplied as a single skid mountedpackage if technically feasible with three Ultrasonic Meter Streams and metering roomequipment to be located in the Equipment room of the central room building. The arrangementof the package and skids to be determined by Vendor. The package shall comprise allnecessary equipment including a minimum of 2 Multi-stream flow computers (with non-resettable flow totalizers), one supervisory computer, one online gas chromatograph to belocated on the skid, sales gas filters, shutdown valve, blow down valve, pressure controlvalves, manual valves, field instrumentation and pipe work and fittings as per P&ID ‘Metering

Skid’ no “1007-DISQ-O-P-DW-48059” and ‘Sales Gas Metering Package Process Data Sheet’ document number “1007-DISQ-0-P-DP-48131”.

Compliance with this specification shall not relieve the Vendor of his responsibility to provide afully completed and safe equipment design including all auxiliary elements necessary toensure reliable and efficient operation under the specified operating conditions.

2 Referenced Documents

The design, construction, fabrication, QC inspection, QC testing, calibration and supply of theSales Gas Metering Package shall be in accordance with the latest revisions of the followingspecifications, data sheets, codes and standards.

2.1 Project Documentation

NUMBER DESCRIPTION1007-DISQ-0-M-RT-42015 Environmental Data and Units of Measurement1007-DISQ-0-P-DW-48059 P&ID – Metering Skid1007-DISQ-0-L-DW-39000 Plot Plan - CTP1007-DISQ-0-P-SS-48079 Specification for Integrated Control and Safety System

(ICSS)1007-DISQ-0-P-DP-48131 Sales Gas Metering Package Process Data Sheet1007-DISQ-0-G-MA-30092 Control System Philosophy1007-DISQ-0-G-DW-30036 Control System Architecture Central Treatment Plant1007-DISQ-0-J-SS-33010 Field Instrumentation General Specifications and Testing

Requirements1007-DISQ-0-J-SS-33030 Control Valve Specification1007-DISQ-0-J-SS-33033 Shutdown Valve Specification1007-DISQ-0-J-SS-33055 Safety Relief Valves Specification1007-DISQ-0-L-SS-39010 Specification for Piping Material1007-DISQ-0-F-DW-10012 Hazardous Area Classification Layout1007-DISQ-0-O-CF-48065 Cause & Effect Diagram1007-DISQ-0-E-SS-27023 Electrical Specifications for Packaged Equipment1007-DISQ-0-G-MA-30088 Electrical System Design Philosophy1007-DISQ-0-L-SS-39004 Specification for Painting and Protective Coatings1007-DISQ-0-F-G-SP-10014 F&G Requirement Specification1007-DISQ-0-F-SS-10018 Specification for Equipment Noise Control


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1007-DISQ-0-M-SS-42003 Package Equipment Specification1007-DISQ-00-QP-1008 Project Quality Plan

1007-DISQ-00-F-QA-1007 QA Plan Article 5 (2 pages of GSA) Measurements and Tests, Para 5.1 to 5.6GASCO Vendor list PNM /2011 Reducing and Metering Gas Stations


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2.2 International Codes and Standards

NUMBER DESCRIPTION

AGA Eng. Tech.Note M-96-2-3

Ultrasonic Flow Measurement for Natural Gas Applications

AGA Rep. No.3 Orifice Metering of Natural Gas and Other related Hydrocarbons Fluids

AGA Rep. No.7 Measurement of Gas by Turbine Meters

AGA Rep. No.8 Compressibility Factors of Natural Gas and Other RelatedHydrocarbon Gases

AGA Rep. No.9 Measurement of Gas by Multipath Ultrasonic Meters, second edition2007

AGA Rep. No. 10 Speed of Sound in Natural Gas and Other Related Hydrocarbons

ANSI B2.1 Pipe Threads (Except Dry seal) Specifications, Dimensions, andGauging for Taper and Straight Pipe Threads Including Certain Special Applications

ANSI B16.20 Ring-Joint Gaskets and Grooves for Steel Pipe Flanges

ANSI B 16.47 Large Diameter Steel Flanges NPS 26 Thru NPS 60

ANSI B16.5 Pipe Flanges and Flanged Fittings

ANSI B 16.9 Factory Made Wrought Steel Butt welding Fittings

ANSI B 16.11 Forged Steel Fittings, Socket Welding and Threaded ANSI B 31.1 Power Piping Code

ANSI B 31.3 Chemical Plant and Petroleum Refinery Piping

ANSI B 31.4 Liquid Transportation Systems for Hydrocarbons, Liquid PetroleumGas, Anhydrous Ammonia, and Alcohols

ANSI B 31.8 Gas Transmission and Distribution Piping Systems

ANSI B16.34 Valves - Flanged and Butt welding End Steel, Nickel Alloy and OtherSpecial Alloys

ANSI B16.104 Valve Leakage Classifications

ANSI B 36.10M Welded and Seamless Wrought Steel Pipe

ANSI C 37.96 IEEE Guide for AC Motor Protection

API 1104 Standard for Welding of Pipelines and Related Facilities

API 2B Specification for Fabricated Structural Steel Pipes

API 500 Recommended practice for classification of locations for electricalinstallations at petroleum facilities classified as Class 1, Division 1 andDivision 2


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API RP 520 Sizing, Selection and Installation Of Pressure-Relieving Devices inRefineries

API RP 550 Manual on Installation of Refinery Instruments and Control Systems,Part 1 - Process Instrumentation and Control, Section 6 - ControlValves and Accessories

API 551 Process Measurement Instrumentation

API 552 Transmission Systems

API RP 553 Refinery Control Valves

API SPEC 6FA Specification for fire test for valves

API RP 14C Recommended Practice for Analysis, Design, Installation and Testing of

Basic Surface Safety Systems for Offshore Production Platforms API 554 Process Control and Instrumentation

API SPEC 6D Specifications for Pipeline Valves, End Closures, Connectors andSwivels

ASME B31.3 Chemical Plant & Petroleum Refinery Piping

ASME B16.5 Pipe Flanges and Flanged Fittings

ASME PTC Temperature Measurement

ASME Section II Material Specifications

ASME Section IX Welding and Brazing Qualifications ASTM A193/A193M Standard Specification for Alloy Steel and Stainless Steel Bolting

Materials for High Temperature Service

ASTM A194 Standard Specification for Carbon and Alloy Steel Nuts for Bolts forHigh pressure / High-Temperature Service

ASTM A234 Specification for Piping fittings of Wrought Carbon Steel and Alloy Steelfor Moderate and Elevated Temperatures

ASTM A269 Standard Specification for Seamless and Welded AusteniticStainless Steel Tubing for General Service

ASTM A269 Specification for Seamless and Welded Austenitic Stainless SteelTubing for General Service

ASTM A320 Specification for Alloy Steel Bolting Materials for Low TemperatureService

ASTM A325 High Strength Bolts for Structural Joints, including Suitable Nuts andPlain Hardened Washers

ASTM A370 Methods and Definitions for Mechanical Testing of Steel Products.

ASTM A403 Standard Specification for Wrought Austenitic Stainless Steel PipingFittings


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ASTM A450/450M Specification for General Requirements for Carbon Steel, Ferritic Alloy,and Austenitic Alloy Steel Tubes

ATEX 95 (Directive94/9/EC)

Directive on Equipment and Protective Systems Intended for use inPotentially Explosive Atmospheres

BS EN ISO 10204 – 2004

Metallic Products - Types of Inspection Documents

DIN EN 10204 Metallic Products - Types of Inspection Documents

DIN 50049 Metallic Products - Types of Inspection Documents

EI15 Energy Institute Model Code of Safe Practice Part 15 ‘AreaClassification Code for Installation Handling Flammable Fluids (3rdEdition).

IEC 664 Insulation co-ordination within low-voltage systems includingclearances and creep age distances for equipment

IEC 60059 IEC Standards Current Ratings

IEC 60079 Electrical Apparatus for Explosive Gas AtmospheresPart 0: General requirements

Part 1: Flameproof enclosures “d”

Part 2: Pressurized enclosures “p"

Part 4: Method of test for ignition temperature

Part 7: Increased safety "e"Part 10: Classification of hazardous areas

Part 11: Intrinsic safety “I”

Part 12: Classification of mixtures of gases or vapours with air

Part 13: Construction and use of rooms or buildings protected by

pressurization

Part 14: Electrical installations in hazardous areas (other than mines)

Part 16: Artificial ventilation for the protection of analyser house

Part 18: Encapsulation “m”( why this gap here?)according to theirmaximum experimental safe gaps and minimum

igniting currents

IEC 60085 Thermal Evaluation and Classification of Electrical Insulation

IEC 60228 Test for electric cables under fire conditions – Circuit integrity

IEC 60331 Degrees of protection provided by enclosures (IP Code)

IEC 60529 Industrial Process Control Valves Inspection & Routine Testing

IEC 60751 Industrial Platinum Resistance Thermometer Sensors


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IEC 61000 Electro-magnetic compatibility – Generic emissions standard

ISA 5.1 Instrument Symbols and Identification

ISA 5.4 Instrument loop diagrams

ISA 18.1 Annunciator Sequences and Specifications

ISA 20 Specifications forms for process measurement and control instrumentsprimary elements and control valves

ISA 50.1 Compatibility of analogue signals for electronic industrial processInstruments

ISA 51.1 Process Instrumentation Terminology

ISA S75.01 Control Valve Sizing EquationsISA S75.02 Control Valve Capacity Test Procedures

ISA S75.03 Uniform Face-to-face Dimensions for Flanged Globe Style ControlValve Bodies

ISA S75.04 Face-to-face Dimensions of Flangeless Control Valves

ISO 1000 SI units and recommendations for use of their multiples and ofcertain other units

ISO 4406 Hydraulic fluid power – Fluids – Method for coding the level ofcontamination by solid particles

ISO 6551 Petroleum Liquids and Gases – Fidelity and Security of DynamicMeasurement – Cabled Transmission of Electric and/or ElectricPulsed Data

ISO 14617-1:2005 Graphical symbols for diagrams

ISO 9001:2008 Quality Management System – Requirements

ISO 15408 Common Criteria for Information Technology Security Evaluation

ISO14001:2004/2009 Environment Management System- requirements

OHSAS18001:2007 Occupational health and safety system- requirements

ISO 17089 Measurement of Gas by Ultrasonic MetersISO 5167-1. Measurement of fluid flow by means of pressure differential devices

inserted in circular cross-section conduits running full -- Part 1: Generalprinciples and requirements

ISO 6976 Calculation of calorific value, density and relative density

ISO 5167 Measurement of fluid flow by means of pressure differential devicesinserted in circular cross-section conduits running full.

ISO 5168 Methods of measurement of fluid flow, estimation of Uncertainty of aflow rate measurement.


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MSS SP 61 Pressures Testing of Steel Valves

NFPA 72E-4 National Fire Alarm and Signalling Code - Automatic FireDetectors

NFPA 90A Standard for the Installation of Air Conditioning andVentilation Systems

SI 1994 3260 The Electrical Equipment (Safety) Regulations

SI 1992 2372 The Electromagnetic Compatibility Regulations

2.3 Order of Precedence

In case of discrepancies among the various documents, the following order of precedence shallbe applied:

1. Purchase Order and amendments thereto2. Data Sheets3. This Package Specification4. Other Referenced Project Specifications5. Egyptian National/Local Codes and Standards6. International Codes and Standards7. Egyptian environment law 4 /2011


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3 Package Components

The Sales Gas Metering Package shall be used as a fiscal sales gas metering system for thesales gas of the Disouq Field Development Project to be transferred from the CentralTreatment Plant into the sales gas pipeline. The Sales Gas Metering Package shallcompensate the flow readings for the online pressure and temperature readings as well as gascomposition through one online gas chromatograph and calculate instantaneous flow ratebased on the sales gas composition. The system shall use an ultrasonic meter as the primarymethod of flow metering method. Other flow terms such as volumetric or energy flow rate andflow tantalization shall be calculated in multi stream flow computers. Non resettable flowtotalization shall be recorded in the flow computer, supervisory computer and the ICSS.

The sales gas metering package shall consist of all mechanical, electrical and instrumentationequipment such as rigid base frame, piping, gas filters, three ultrasonic flow meters,instrumentation, one online gas chromatograph, cabling and the metering system. Themetering system shall be located in the equipment room of the control room building and shallinclude the metering cabinet with marshalling cabinet ex interfaces/barriers, 2 multi streamflow computer for handling of four ultrasonic meter streams in minimum, supervisory computer,printer and operator workstation c/w keyboard, mouse and LCD display or touch screen, twocommunication interfaces with the ICSS, two communication interfaces for the communicationwith the SCADA system of the Gas Grid Operations Company shall be provided and a junctionbox or terminal strip with four hardwired signals (IS type) for the hardwired transfer of thesesignals to the Gas Grid Operation Company.

The Gas Grid Operations Company will be responsible for the pick-up and transfer of allsignals and communications from the metering cabinet inside the equipment room of thecontrol room building on the CTP to the location of the SCADA system of the Gas Grid

Operations Company.

Each multi-stream flow computer function shall calculate, record, report the corrected salesgas volumetric flow rate (in MMSCF/d and in MMSCM/d), energy flow rates (in BTU andkWh/MWh) and associated total quantities of ultrasonic flow meters as required. TheSupervisory computer shall manage, compare and report the flow computer results andvalidity of measurements where the operator workstation shall provide the GUI for the operatorto interface with the system and provide access for printing and reporting.

The Sales Gas Metering Package inlet gas composition, pressure, temperature, flow rate andsales gas outlet pressure is detailed within the Sales Gas Metering Process Data Sheetnumber “1007-DISQ-0-P-DP-48131”.

The Vendor is required to confirm the necessary technology and equipment required to meetthe specification. As a minimum, the package will consist of inlet/outlet headers,interconnecting piping, gas filters, ultrasonic meter runs (US Meter Streams), pressure controlvalves, shutdown valve, blow down valve, relief valves, ultrasonic flow meter, fieldinstrumentation, two multi stream Flow Computer in minimum, supervisory computer,instrumentation panels and metering cabinets, skids and supports, electrical and instrumentwiring and junction boxes as shown in figure 1 below.


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Figure 1

The following is a description of the minimum Sales Gas Package Process Components asper P&ID No:

- 1007-DISQ-0-P-DW-48059 P&ID Metering Skid

3.1 Inlet / Outlet Pipe Spools and Interconnecting Piping

The main inlet / outlet piping, metering runs and header shall be designed for 100% of themaximum flow rate and shall be equipped with the required instrumentation as shown in the

P&ID- Metering Skid “1007-DISQ-0-P-DW-48059”. The complete pipe inlet and outlet spools layout, arrangement of thermowell tap anddimensions shall follow the recommended default installation requirements of AGA Report No.9, Edition 2007, Section 7, for unidirectional design in minimum unless otherwiserecommended or required by the Ultrasonic meter manufacturer.

The requirements and dimensions of the piping shall be according to the Specification forPiping Material document number “1007-DISQ-0-L-SS-39010”.

The inside surface finish of the piping used with Ultrasonic meters shall be 250µinch Ra orbetter and machined honed. The welds shall be 100% radiographic tested.

The inlet pipe spool shall be equipped with a threadolet for bypass connection of inlet ball

valve. The outlet pipe shall be equipped with threadolets for connections of instruments andother required equipment as specified by the relevant code.

3.2 Sales Gas Filter

Dependent on the gas analysis and quality, the gas metering skid shall be equipped with gasfilters. Gas filters shall have 100% standby capacity. The gas filter shall be able to separateliquids from natural gas. Each gas filter shall consist of one/multi cycle separation stage,cartridge filters and shall have required valves and instrumentation including a vent anddepressurizing connections.

For a quick and easy replacement of the filter cartridges the filter shall be equipped with fullsize opening with a quick closing door. The filter shall be equipped with:


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o Inlet and outlet plug valveso Pressure Differential transmittero Pressure Differential and Pressure Indicatoro Level Indicatoro Drain and vent valveso Safety relief valveo Maintenance manhole (if applicable)

The pressure drop across the clean filter shall not exceed 0.5 barg at the maximum flow.

3.3 Metering Module

The metering module shall consist of three metering runs (metering streams), and theassociated instrumentation necessary to calculate, correct, record flow rate and gas quantities

at standard conditions in MMSCF/d and MMSCM/d. The number of metering streams inoperation shall be decided based on plant production and consumer requirement althoughthere shall be at least one stream as a hot stand-by meter.

The change-over of the metering streams from operating stream to stand-by and vice-versa,shall be achieved by manually operated valves. Each Metering stream (Metering Run) shall besupplied with calibration certificate.

Metering runs or metering streams’ sizing shall take in consideration the maximum andminimum flow rate as specified in the process data sheet to insure maximum accuracy withinthe full flow operation range.

The minimum equipment of each metering run shall comprise:

o Inlet and Outlet ball valves.o Ultrasonic flow meter.o Pressure transmitter.o Temperature transmitter.o The meter module instrumentations shall be designed and connected to the flow

computer for totalizing, correction and recording.o Each meter shall have a maximum permissible error of ±0.5% over the flow range.o Repeatability of the meters must be within +/- 0.2% for the higher velocity rangeo The total uncertainty of the metering package shall not exceed 1% independent of the

number of streams in operation and shall be tested and verified during flow calibrations

in accordance with AGA Report No.9, Edition 2007, section 6 and the recommendedflow rates. Flow Calibrations are mandatory for fiscal metering applications.

Pressure, Temperature transmitters and instrumentation shall be supplied with high accuracyand valid calibration test certificates.

3.3.1 Ultrasonic Meter

An ultrasonic meter shall be installed as the primary measuring device in the metering systemin compliance with AGA Report NO. 9. The ultrasonic meter shall be based on the latesttechnology and shall be multi-path type (4-path in minimum) with the chords arranged suchthat the flow profile can be analysed. Failure of a path shall not result in a measurement failure


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but shall trigger an alarm that accuracy or measurement is affected. The meter reading shallbe corrected or compensated for the temperature and pressure effect on the measuring path.

Accuracy of Ultrasonic Meter shall be equal to or more than 99.5%. The ultrasonic meter shallbe installed in a way to minimize the accumulation of contaminants.

The ultrasonic meters shall have a large dynamic range and within this range, the followingrequirements must be fulfilled:

Negligible offset error.

High repeatability.

High absolute accuracy.

Moreover, the ultrasonic meters shall be unaffected by installation effects such as:

Swirl.

Asymmetry. Pulsations

The signal transmission of the Ultrasonic Meter shall use digital signals to avoid fluctuations insound velocity and to be able to check signal quality in addition to having built in diagnostics.

The Ultrasonic Meter shall have dedicated software to examine the performance of themetering system. The performance of the metering system shall examine but not limited to thefollowing:

Swirl and asymmetry.

Ultrasonic meter footprint and ratio (verify the meter by checking the measured Velocity

of Sound versus the Calculated Velocity of Sound). Performance monitoring of the meter.

The measuring device and associated transducers shall be capable of operating withoutdetriment of performance throughout the expected pressure and temperature range andshould not be affected by changes in ambient conditions.

The Vendor shall provide a study on how to minimize the effect of unsteady flow conditionsdue to the presence of compressors upstream the Metering Package on the Ultrasonic meterperformance.

The Ultrasonic meter shall provide two types of signals:

Frequency/Pulse signal. Serial port for a minimum distance of 300m between each meter and the flow

computer.

The body of the ultrasonic meter shall be designed, manufactured and tested in accordancewith the relevant sections of API 6 D and ASTM A-216 GR WCB or other material standardsequivalent to these.

The pipe material for the ultrasonic meter, bolts, nuts and flanges shall designed,manufactured and tested in accordance with the Specification for Piping Material, documentnumber “1007-DISQ-0-L-SS-39010” and the inside surface finish shall be designed as


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250µinch Ra or better and machined honed. The hydrostatic test pressure of the meter bodyshall be 1.5 times the design pressure.

The inside diameter of the ultrasonic meter shall have the same inside diameter as theupstream tube’s diameter and must be within 1% or better in accordance with AGA ReportNo.9.

All material exposed to the gas shall be gas-resistant. The surface of the transducers shall notbe degraded in performance due to contact with natural gas. The transducers shall beremovable under pressure. Removal and reinstallation of transducers shall not affect thecalibration of the meter nor the accuracy. The vendor shall supply the retraction equipment toremove the transducers under pressure.

Each ultrasonic meter shall be sandblast and shall be painted in accordance with theSpecification for Painting and Protective Coatings, document number “1007-DISQ-0-L-SS-

39004”.

3.4 Metering System

The metering system shall comprise of two multi stream flow computer in minimum,Instrumentation Panel, supervisory computer, operator work station and secondary devices.The metering system cabinets shall be located in the equipment room of the control roombuilding.

The Metering System shall interface with the plant DCS System via redundant single modefibre links or redundant copper cable serial links (Ethernet TCP/IP) which will be confirmedduring detail design and shall be monitored from the plant HMI (OWS) that will be located inthe Central Control Room (CCR) of the control room building on the Central Treatment Plant.

Vendor to provide intrinsically safe junction box with 12 terminals (3 terminals each signal) for3 analogue intrinsically safe signals and one digital intrinsically safe impulse signal (max. 50Hz) as interface point for the Gas Grid Operator GASCO located outside the metering cabinetin a junction box or inside the metering cabinet on a terminal strip as follows:

Flow rate; 4-20mA, 0-165 MMSCF/d. Pressure; 4-20mA, 0-100 barg. Temperature; 4-20mA, 0-80 degree Celsius. Impulse signal (max. 50 Hz, dry contact) for totalizer inside GASCO.

Above mentioned hardwired signals shall be in parallel also transferred via RS 232 interface.

Vendor shall provide active standard Serial link RS 232 port (physical DB 9 socket) in slavemode and standard Modbus RTU.

Vendor shall provide also Ethernet connection (physical RJ45 socket), standard Modbus (forfuture connection).

Gas analysis data C1 to C9 shall be transferred via serial link RS 232 and Ethernetconnection.

The Gas Grid operator GASCO shall be responsible to pick up the signals from abovementioned interface points and transfer the signals to his premises.


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3.4.1 Multi-stream Flow Computer

Multi stream flow computer shall be fully wired, furnished and configured to serve 4 streams inminimum.

The Multi-stream flow computer convert uncorrected flow figures into corrected flow following,the equations detailed in AGA 7 and shall compensate if required the flow readings for theonline pressure and temperature readings as well as gas composition through the online gaschromatograph, and calculate flow rates (in MMSCF/d and in MMSCM/d) and shall be capableto summarize at least 4 working metering streams.

One multi-stream flow computer shall be in operation and the other shall be a hot standby.

The operating flow computer shall receive the reading from the Ultrasonic Meters. As only twoout of the three meter streams are operating and the third is on standby, the flow computershall sum up the flow from the two meters and send the results to the supervisory computer.

3.4.2 Supervisory Computer

The Supervisory computer shall be equipped with necessary check and validation software toconfirm reading accuracy, reliability and validity. The supervisory computer shall supervise,manage the flow computers and check flow calculation accuracy and validity. The SupervisoryComputer shall be able to change between main and standby flow computers as and whenrequired. The supervisory computer shall report the plant flow rate and sold quantities forenergy in BTU and kWh and volume in SCF and SCM (per shift, day, week, month, year andtotal).

The Supervisory Computer software shall have the capability to check the validity, reliability,performance and accuracy of the Ultrasonic Meters. The purpose of these checks is to

guarantee that the ultrasonic meters are performing satisfactorily within the specifications andthe initial meter calibration is still valid.

3.4.3 Operator Work Station

The Operator Work Station (OWS) shall be PC-based industrial computer type and shall beprovided with a dedicated keyboard, screen, mouse and printer.

The Operator Work Station OWS shall be provided with a proprietary software packagedesigned for easy, ergonomic operator interface with the Metering Package facilities.

The software package shall include a suite of Graphical User Interfaces (GUIs). The GUIsshall be based on the Metering Skid P&ID to provide an accurate and familiar representation

of the process Arrangement.The Operator Work Station (OWS) display pages shall give the operator an overview of all theconnected metering streams.

For each of the meter streams, the following data shall be displayed:

The volume flow rates at line conditions and at standard conditions in MMSCF/d andMMSCM/d.

The energy flow rate in BTU and kWh/ MWh.

The mass flow rate in kg/h and metric tons/h


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Volume-, Energy- and Mass Flow- total per shift, day, week, month, year and overalltotalizer

The pressure and temperature in barg and degree Celsius. Detailed Information about the Ultrasonic Meter includes flow direction and data

validity.

Ultrasonic meter performance monitoring.

Signal to Noise Ratio.

Speed of Sound (SOS) Comparison as described in the AGA10 standard.

Swirl Angle Monitor.

Asymmetry Monitor.

3.4.4 Instrumentation Panel

Instrumentation Signals of the three metering runs shall be terminated at skid edge intrinsicallysafe junction box. The layout, design of the junction box shall follow the 1007-DISQ-0-J-SS-33010 ‘Field Instrumentation General Specification and Testing Requirements’ and 1007-DISQ-0-E-SS-27023 ‘Electrical Specification for packaged Equipment’ and shall be subject tocompany approval.

3.4.5 Secondary Devices

The Instrumentation for each metering run classified as "secondary devices" includes, but notbe limited, to the following:

One Electronic static pressure transmitter, 4-20mA, 2 wire, HART protocol compatible,

intrinsically safe transmitter. One Electronic Temperature transmitter, 4-20mA, 2-wire, HART protocol compatible,4-wire PT 100 from thermowell to head transmitter, intrinsically safe transmitter

Instrument vendors for all instruments shall be in accordance with attached vendors list. Theyshall have required linearity and repeatability with negligible mounting position. It is requiredthat these transmitters are selected to have an accuracy of ± 0.1% of calibrated span and astability of ± 0.1% of URL per 60 months in minimum.


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4 Extent of Supply

4.1 Inclusions

The scope of supply shall include, but not be limited to the following:

Package Process Components: Inlet / Outlet Pipe Spools and Interconnecting Piping. Sales Gas Filters. Metering Module including three Ultrasonic Meters.

Metering System Multi-stream Flow Computer. Instrumentation Panel. Supervisory Computer including Software and Hardware

Operator Work Station c/w screen, keyboard, mouse and printer includingSoftware and Hardware Secondary Devices as per section 3.4.5

All flow, pressure and temperature instrumentation, together with manifold valvesand enclosures.

Gas chromatograph C1 up to C9 in online operation installed on the skid with allaccessories required such as test gas and data link to the metering cabinet formonitoring purposes and link into the flow computers etc.

System /marshalling/termination cabinet. Cable trays / supports JB’s and for Company’s power and Instrument cabling. Special system cables, including data communication connections to ICSS and Gas

Grid Operations Company interface inside or outside the metering cabinet, anyspecial cables and connectors required for system operation and gas chromatographonline operation and monitoring.

Intrinsically safe and other Junction boxes as required. Terminations and isolation facilities for maintenance. Redundant Power supply modules. System Input/ Output interface equipment. System computers and processors with battery backup. System network Interface units. Redundant network communication system. All operational software (including all licensed operating software and required

protocols for system interfaces), configured to meet the application requirements. Supervisory Computer management and validation software. System engineering and design including system architecture and all cabinet design. Implementation of functions. Computational algorithms, logic and sequence design. System power supply design, internal power distribution boards and earthing design. All necessary equipment and communication cables fully configured for plug and

play to interface with other systems. Structural Steel Skid Base plate(s) c/w drip pan, diagonally arranged two earthing

points per skid in minimum and flanged drain connection.


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On skid interconnecting piping, pipe supports, valves and fittings for process,utilities, vents, shutdown and relief systems terminating at skid edge with flanged

connections. Instrumentation, valves, fittings and tubing. Skid Earthing and Bonding. Safety devices (including alarms, shutdowns, interlocks, signs, access restrictions,

personnel protection, lightning protection, etc.). Skid lighting if required. Special Tools. Fabrication and Assembly. QC Inspection & QC Testing (including calibration of each meter run and the whole

metering package, factory, system integration and site acceptance tests includingtest procedures and report).

Painting and Protective Coating.

3rd Party Certification. Supervision of Installation. Commissioning and start-up spare parts. List of Two Years operational spare parts. List of Capital Spares. Packing, Marking and Preservation. QC Test Equipment required for Calibration runs, FAT, SIT, and SAT. Documentation as detailed within VDRF and Minimum Quality Surveillance

(including installation, operation and metering maintenance manuals, validation,factory acceptance-, system integration-, site acceptance test and calibrationprocedures).

Performance and Mechanical Guarantees. QC Calibration certificates as required for fiscal sales gas metering application.

4.2 Exclusions

The following Items are excluded:

Civil Works including foundations E+I cabling work from Metering Skid to Metering Cabinet and ICSS inside equipment

of Central Control Room building. Earthing connection of metering skid to plant earthing system

4.3 Battery Limits

The battery limits shall be as indicated on the relevant P&IDs (1007-DISQ-0-P-DW-48059)

For skid mounted packaged equipment the battery limits (i.e. pipe work flanges and instrument junction boxes) shall be located at the skid base plate edge, skid base frame supports or in themetering room as applicable. This is as further defined below:

Gas Inlet (R1). Gas Outlet (R2). Flare (PSV Outlet) (N-5401 A) (R3). Flare (PSV Outlet) (N-5401 B) (R4). Flare (BDV Outlet) (R5).


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Flare (PCV Outlet) (R6). Manual Vent; Metering Run A (R7).

Manual Vent; Metering Run B (R8). Manual Vent; Metering Run C (R9). Instrument Air Supply connection. Electrical supply connections. Earthing connections. Hardwired instrumentation interfaces (Junction Boxes on skid edge). Interface connections for Gas Grid Operator Company.


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5 Design Requirements

5.1 Basic Design Data

The Gas Metering package shall be designed for continuous operation outdoors on the CentralTreatment Plant (CTP) of the Disouq Field Development Project located in the North Nile Deltaof Egypt environment and in accordance with the relevant data sheets, specifications, codesand standards and other applicable documents listed in section 2. All supplied equipment andcomponents thereof shall be designed for a minimum design life of twenty five (25) years. Inaddition, the equipment shall be designed, engineered and constructed to ensure safety,environmental compliance, reliability, quality, efficient operation and ease of maintenance. Anoverall package availability of 99.8% is required.

Measuring equipment shall be designed and operated to ensure to meet also the requirementsof Article 5 ‘Measurements and Tests’ Para 5.1 till 5.6 and an overall uncertainty of themeasurements not exceeding one percent (1%) as stated explicitly in Para 5.5 ( see attachedtwo pages of Article 5 ).

The total uncertainty of the each stream and the different combinations of stream and thewhole metering package shall be verified with individual meter and metering package testingand calibration in accordance with AGA Report 9, Edition 2007, Section 6.

IEC 60079 or equal International standards shall be used to classify hazardous areas. FEEDHazardous Area Classification Layout; see document number “1007-DISQ-0-F-DW-10012”.

All electrical and instrumentation equipment on the skid shall be designed, mounted, classifiedand certified for zone 1 in accordance with EN 60079-10 or 2G in accordance with ATEX 95and Gas Group II CT4 or equal.

Associated ex interfaces/barriers in the metering cabinet shall be suitable classified andcertified to match the requirements of the electrical and instrumentation equipment installed inzone 1 in accordance with EN 60079-10 or 2G in accordance with ATEX 95 and Gas Group IICT4.

The Vendor shall confirm quantity of hydrocarbon releases and durations for all and any flaringcases including start up, process shut down and ESD of the package. The Vendor shall payparticular attention in the design to minimise emissions, air pollutants or releases of toxicwaste products or any other contaminants into the environment. Details of all hazardous andnon-hazardous emissions shall be identified (See emissions limits in appendix -6, Egyptianenvironment law 4 /2011).

The Gas Metering Package shall be designed to avoid any hydrocarbon emissions.Continuous flaring during normal operation is not allowed.

Particular attention shall be paid to prevent vibration of skid mounted pipe work. Adequatepipe supports shall be provided at suitable intervals to prevent excessive vibration duringoperation.

The Vendor shall supply and install insulation and/or protective equipment where required onall pipe work supplied as part of the package.

The Metering Runs/Streams shall be installed between inlet and outlet headers. Eachmetering run shall collectively cover the 50% of the maximum plant flow rate with 10% over-size. Each metering run/stream shall be designed to give a turndown ratio in accordance with


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document number 1007-DISQ-0-P-DP-48131, Sales Gas Metering Process Data Sheet. Eachmetering run/stream shall comprise of one Ultrasonic flow meter (USM), static pressure

transmitter upstream the USM and temperature transmitter with 4-wire PT 100 and headtransmitter downstream the USM, all field instrumentation shall meet the FieldInstrumentations General Specifications and Testing Requirements “1007-DISQ-0-J-SS-33010”.

The Gas Grid Operations Company requested 73 Diameter straight lengths upstream anddownstream pipe diameter of the USM.

Vendor to submit a comprehensive study on the advantages/disadvantages of installing flowconditioner/ straightening vanes upstream the ultrasonic meter stating his recommendationson whether such flow conditioner/vanes should or should not be installed for this application.Company has the full right in view of this study or based on other technical opinions to decidewhether or not these flow conditioner/straightening vanes shall be installed.

The measuring process should take place in a pipeline of circular cross-section. The ductcross section uncertainty is a factor in the total uncertainty calculation of the system.

Vendor shall submit detailed data regarding the ultrasonic meters. This data must cover indetail the following items:

Theory of operation Calculation of speed of sound, noise level and flow speed covering the flow range Determination of upstream and downstream straight lengths of flow meter based on

process connections upstream and downstream of metering package, USMmanufacturer recommendation, process connection with other equipment, pipingarrangement and uncertainty requirements

Flow simulation for the package covering the max. flow range Uncertainty calculation per stream, for different combinations of streams and with all

streams in operation Detailed procedure of flow calculation for the different operation scenarios. Data sheet to clarify the material of construction and important data for each part of

the Ultrasonic meter Detailed study showing the increase of accuracy and advantages gained when

increasing the number of USM transducers and vendor recommendation for thenumber of USM transducers (minimum 4-path )

All QC Tests and QC calibration procedures for which the USM will be subject

The Ultrasonic meters shall be approved for use in hazardous area ‘Zone 1’ independent of the Hazardous Area Classification Layout document no. “1007-DISQ-0-F-DW-10012”, andshall have the certification for operation in Sales Gas Metering Stations (SGMSs) for gas flowmeasurement equipment as per custody transfer measurement requirements in accordancewith AGA Report 9, Edition 2007.

The centre line of the ultrasonic flow meter shall be within ±1% of the pipe centre. Theupstream pipe section adjacent to the ultrasonic meter shall be in accordance with AGAReport 9, Edition 2007, section 7and the requirements of the USM manufacturer.

The inside surface finish of piping upstream and downstream of the USM shall be 250µinch Raor better and machined honed.


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Scope of ultrasonic Vendor shall include supply of upstream calibrated meter tubes anddownstream calibrated meter tubes, as required to guarantee fiscal metering system

uncertainty and requirements of ultrasonic vendor.It shall be expected for the system to receive entrained liquids deposits.

The ultrasonic flow meters shall operate within the specified operating conditions to meet thesales gas metering package uncertainty of less than 1% under all operating conditions andover the whole flow range as permitted under the Gas Sales Agreement between the Sellerand Buyer of the Gas. Swirl and non-uniform velocity profile effects shall be reduced to aninsignificant level by proper installation of the meter.

Calculations necessary to calculate corrected volume, mass flow and energy flow rates shallbe performed by the flow computers and shall be in compliance with the flow equations of AGA-7.

AGA-8 for the comparison of the meters reported SOS and AGA-10 for speed of soundcomputing.

Field devices for flow metering service shall be 4-20mA, HART compatible type transmitters,intrinsically safe. Field devices shall be wired to the flow computations via dedicated twistedpaired and individually screened and shielded cables.

The gas composition shall be determined by manual sampling and laboratory analysis atregular intervals. The data will be manually input into the flow computer calculations andadditional online monitored with gas chromatograph from C1 up to C9.

5.2 Piping, Flanges, Gaskets and Bolts

All piping shall be contained within skid edge and shall be fabricated, assembled and securedin position onto the skid prior to shipment. Process piping systems forming interconnectionsbetween skid mounted equipment shall be designed in accordance with ASME B31.3.

External pipe work connections and pipe connections to all skid mounted equipment such asgas filter, control valve and shutdown valve shall be flanged in accordance with ASME B16.5and sized as appropriate to the service design conditions.

All Piping, Flanges, Gaskets and Bolts shall be designed in accordance to document number“1007-DISQ-0-L-SS-39010” Specifications for Piping Material”.The pipe work arrangement and connections to all equipment shall follow recommendationsstated in AGA Report 9, Edition 2007, Section 7 and the manufacturer’s requirements of theUSM.

Isolation and drain valves shall be provided in piping systems and around equipment inaccordance with the requirements of the applicable design code(s) where required to ensuresafe operation and/or adequate protection of equipment.

5.3 Painting

All equipment shall be painted and coated in accordance with Specification for Painting andProtective Coatings “1007-DISQ-0-L-SS-39004”.

A sufficient quantity of touch-up paint (10%) shall be supplied with the equipment to repairminor damage to the paint finish after site installation.


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5.4 Skid Assembly

As far as practical within the limits of manufacture, transportation and installation, allequipment supplied as part of the Sales Gas Metering package shall be supplied fullyassembled and mounted on a common rigid welded steel skid base-frame calibrated and fullypre-commissioned ex works in order to minimise site installation and hook-up.

The skid shall be completed with all equipment, interconnecting piping, pipe supports, fittings,wiring, cabling, junction boxes, panels, metering cabinets as separated items but fullypretested, instrumentation, control valves, blow down valves and shutdown valves as shownon the P&ID- Metering Skid “1007-DISQ-0-P-DW-48059”. All skid wiring and terminals shall belabelled and wiring for connections shall terminate in appropriate junction boxes at the edge ofthe skid.

In determining the equipment/package skid sizing, the Vendor shall take into account the

maximum permitted limits for road and rail transportation as defined within the materialrequisition. The skid shall be suitable for mounting directly onto concrete foundations and themetering cabinets on cabinet foundations in the equipment room of the control room building(foundation details layout and dimensions and weight of metering cabinets to be handed overto civil engineering of building designer).

Provision shall be made for venting of equipment where necessary.

The skid design and layout shall comply with project document number ”1007-DISQ-0-M-SS-42003”, Package Equipment Specification.

5.5 Metering System Design Requirements

The Metering system shall be designed for continuous operation. Central Treatment Plant

(CTP) production will be continuous, 24 hours per day, 365 days per year.

The system shall be designed upon the philosophy of long term, trouble free operation withminimum downtimes for maintenance only. Functionality for performance monitoring andvalidation comparison of all instrumentation including flow meters, temperature and pressuretransmitters shall be included in the Metering system.

The Metering system shall contain diagnostic routines to alert the operator of componentfailure, over range operation, invalid metering data and shall raise an individual alarms on theDCS System.

5.5.1 Transient, Static and RFI Protection

Each element of the metering system shall operate normally and within the samespecifications, when subjected to an RFI test according to IEC 61000-4-3 test level/test fieldstrength (10 V/m) with a frequency range 26 MHz to 2000 MHz The total effects of the radiofrequency interference shall be equal or less than 0.1% of the output spans, with thetransmitter enclosure cover in place.

The vendor shall describe in his proposal the system transient immunity testing andcertifications that have been obtained.


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5.5.2 Cabinet Design

The cabinet shall be Rittal type or similar. The cabinet shall include any cable marshalling andshall be free standing, designed and constructed with sufficient strength and ruggedness tosupport the equipment without flexing.

Cable entry to the cabinet shall be from the bottom, with a suitable cable clampingarrangement and certified method for sealing the cabinet against dust and dirt entry. Thecabinet shall have front lockable doors and a suitable plinth. The cabinet shall be identifiedwith a nameplate on the front door.

The cabinet shall be supplied with cooling fans if necessary to maintain the cabinet interiortemperature a maximum of 10°C above the maximum building environment temperature withall internal equipment and external loads energised. Fan failures in the cabinets shall bealarmed.

The cabinet shall be equipped with an internal light and continental 230 Volt, 50Hz, 1Ph, N, PEoutlet socket derived internally inside the metering cabinet from the main power supply input.

For the cabinet Earthing & Bonding Refer to Doc. No. 1007-DISQ-0-E-SS-27023 Electricalspecifications for packaged equipment.

The cabinet wiring shall be sized to suit the individual load requirements. All wiring shall run incable trays and cable ducts and transmission cables sized to provide at least 20% sparecapacity.

Adequate segregation shall be provided between the instrument analogue signals, theinstrument digital signals, NON-IS- and IS-Signals and the AC power wiring.

All terminating wiring shall be fitted with crimp tags. Terminals shall be Weidmueller SAKR orsimilar knife-edge isolating terminals for incoming/outgoing low voltage/low current signals.SAK type or similar shall be used for other signals. Fused indicating type terminals (e.g.Weidmueller AFT or similar) shall be used for power.

The layout and identification of terminals for the field cable terminations shall be on a multi-core cable basis, with all spare cores terminated.

5.6 System Software Design Requirement

The Gas Metering system software shall monitor the flow, pressure and temperature s of eachMetering Run/Stream. The software shall be able to calculate e.g. all other parameters,convert uncorrected into corrected gas figures and shall be able to monitor and diagnose the

each meter stream and the whole system in accordance with AGA Report 9, Edition 2007relevant sections.

The software shall be able to carry out the Performance QC test, Verification and Validationprocess on a routine basis and if and when required by metering focal point of operationscompany. Any changes in composition data shall be manually input into the system whenidentified.

All measured, calculated and diagnostic data for each Metering Run shall be monitored byDCS System via redundant Fibre optic cores links (FOC). The interface shall be redundantand fully compatible with the selected DCS System.


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5.7 Noise Limitations

The overall Sound Pressure Level from the package shall not exceed 80 dBA at 1 metredistance from the skid edge. If necessary noise control measures shall be applied to theequipment by the Vendor to ensure that these limits are adhered to. Where noise controlmeasures such as acoustic insulation or acoustic enclosures are required, these shall beprovided by the Vendor. These enclosures shall be easily removable without the need todismantle any part of the equipment or otherwise shall not obstruct operational or routinemaintenance activities.

The VDRF will require the vendor to confirm the predicted sound power level and maximumoverall sound pressure level in accordance with Noise Control Specification document number“1007-DISQ-0-F-SS-10018” and Egyptian environment law 04/2011, appendix 7.

5.8 Utilities

The design shall conform to the available site utilities and respective “Utility Conditions”detailed in the process data sheets 1007-DISQ-0-P-DP-48131.

5.9 Material Certificate to Conformance (C&C)& Traceability

All field instrumentation shall be supplied with valid calibration certificates. The Vendor shallprovide (C&C) to ensure appropriate manufacturing systems and procedures are used toensure full traceability of materials (see Quality Assurance Plan, requirement No. 22). Duringmanufacture each assembled component shall be clearly and permanently marked in orderthat it can be traced back to the originally supplied material certificate and its origindetermined.

5.10 Name platesThe Ultrasonic meter and all field instruments shall be equipped with a manufacturer’snameplate of 316 stainless steel permanently attached with stainless steel screws or rivetsindicating the specified data. In addition to specified data the following data shall be providedwhich is a minimum:

Tag number

Serial number

Model number

Direction of flow

Flow Range

Number of Paths Purchase Order Number

Manufacturer’s Name

Year of Manufacture

Other important design parameters ( e.g. medium and ambient operating temperatures )

Ingress Protection

Hazardous Area classification and certificate number


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5.11 Climate Condition

The Sales Gas Metering Package shall be suitable to operate in the north delta climateconditions as per Environmental Data and Units of Measurement, document number “1007-DISQ-0-M-RT-42015”.

The metering system shall be installed in the equipment room of the control room building withthe following conditions:

Normal HVAC conditions:

Temperature 22 C +/- 2 C.

Relative Humidity 40% to 60%

Design conditions:

Temperature 45 C. Relative Humidity 80%

6 Electrical Requirements

6.1 General

Electrical equipment shall be provided in compliance with the codes & standards and inaccordance with Doc. No. 1007-DISQ-0-E-SS-27023 ‘Electrical Specifications for PackagedEquipment’.

The insulating and dielectric materials used in all electrical equipment shall be non-toxic and

shall not contain components that are persistent and/or hazardous environmentalcontaminants.

The design of the electrical installation and equipment shall ensure that easy and adequateaccess is provided for all operational and maintenance purposes.

6.2 Power Supply Voltages

Refer to Doc. No. 1007-DISQ-0-E-SS-27023 ‘Electrical Specifications for PackagedEquipment’.

6.3 Hazardous Area Requirements

Refer to Doc No. Document No. 1007-DISQ-0-F-DW-10012 ‘Hazardous Area Classification

Layout’.6.4 Certifying Authorities


6.5 Ingress Protection for Electrical Equipment



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6.6 Cabling

Refer to Doc. No. 1007-DISQ-0-E-SS-27023 Electrical Specifications for PackagedEquipment’.

6.7 Equipment Earthing & Bonding



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7 Installation, Operation and Maintenance

7.1 Installation, Pre-commissioning and Commissioning

All installation, Pre-commissioning, commissioning and operating instructions for electrical,instrument and mechanical equipment shall be included and indexed in the Installation, Pre-commissioning, Commissioning and Operating Manuals for the sales gas package inaccordance with Contract requirements as described in the Requisition.

The Vendor shall ensure that sufficient qualified personnel are at all times allocated to theproject. The Installation of the sales gas package shall be carried out with the assistance andunder supervision of the Vendor representative, any special tools required for installation, startup, Pre-commissioning and commissioning and acceptance QC tests shall be provided byVendor.

7.1.1 Start-Up, Pre-commissioning and Commissioning Services

The Vendor shall provide services related to the Pre-commissioning, Commissioning andStart-up of the Package equipment which shall include, but not be limited to, the following:

Verify proper package system components and installation

System power up

Perform diagnostics on all package components

Verify metering and control system

Verify overall integrity of the package system and the integrity with the ICSS as well

Verify proper package system operation

Submit detailed installation, start-up, Pre-commissioning, commissioning andacceptance QC test reports for the sales gas package system and individual items asrequired

All QC test and QC verification equipment shall be provided by Vendor.

7.2 Maintainability

The package shall be arranged to allow sufficient access for maintenance and operation. Thelayout of the package shall reflect a compact ergonomic design with adequate spacingbetween adjacent equipment and pipe work. The assembled skid shall be supplied with allrequired access platforms, valves and instruments for safe operation and routine maintenance. Adequate withdrawal space and/or removable pipe spools shall be provided, where necessary,

to permit removal and replacement of major components of the package.

Piping shall be arranged and supported so that the identified equipment maintenance itemscan be removed without dismantling surrounding equipment other than removing spool piecesadjacent to equipment connections.

All valves shall be located and arranged for operation from suitable access platforms or fromground level.

The Vendor shall supply necessary special tools (i.e. withdrawal tools and associated cradlesas required) to enable periodic maintenance.


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listed (as per Vendor recommendation with the turn over methodology) and quoted separatelyfrom the main equipment as optional item.

7.6 Training

7.6.1 Training Philosophy

Vendor shall provide formal training both on site and at the Vendor facility for Companypersonnel.

7.6.2 Training Course Documentation

For each trainee who will attend a training course, a copy of the complete training course,material, notes, and drawings shall be provided to Company one week prior to thecommencement of the training course. The copies shall be retained by the trainees on

completion of the training course and an original copy shall be the property of Company.

7.6.3 Operator Training Course

Operator manuals shall be made available to Company prior to this course.

7.6.4 Maintenance Training Course

The course purpose is to train technicians, operators and engineers for first line faultdiagnosis and repair.

7.6.5 System Configuration Course

The purpose of this training

course is to enable Company personnel to be able tounderstand and modify system configuration control and sequencing.

The Vendor shall recommend the location for this training in coordination with the company.

7.6.6 Training Aids

The Vendor shall list training aids required for above courses.


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8 Preparation for Shipment

All equipment shall be supplied fully assembled wherever and whenever possible. In order tominimise the installation and pre-commissioning time at site, the equipment shall be suitablypacked ready for shipment. The Vendor shall also include adequate protection andpreservation for a minimum of six months outdoor storage from delivery to site. All necessarytemporary supports and other facilities shall also be provided to enable the equipment to besecurely anchored during transport.

Each equipment item shall be clearly identified on the outside of the packing with a descriptionand tag number so that any packaging doesn’t need to be removed until such time as theequipment will be required to be installed.

Spare parts shall be individually packed for long term storage. All exposed or loose parts shallbe completely boxed with identification tag. Gaskets supplied by the fabricator shall be new;

gaskets used for shop hydrostatic test are not acceptable.

9 Quality Assurance & Health, Safety and Environment

The Vendor and his Sub-Suppliers shall maintain be certified and maintain active BS EN ISO9001:2008 certificate “Quality Management Systems – Requirements” and in accordance withDisouq Project Quality Plan and its Quality Assurance Plan and the Minimum Quality AuditSurveillance Requirements document.

Also, the Vendor and his Sub-Suppliers shall be certified and maintain active ISO14001:2004and OHSAS18001:2007 certificates

These integrated management Systems shall be adopted by the Vendor throughout the

various phases of the project (Engineering, fabrication, assembly, QC testing and Inspection).The Vendor shall manage and implement the work in accordance with good managementpractice, covering engineering, purchasing, expediting, fabrication and QC testing in respect ofthe applicable regulations, Codes and Standards.

9.1 QC Factory QC Acceptance Test (FAT)

The Vendor shall perform inspection and testing at his shop in the presence of Companyand/or its representative prior to shipment. Vendor shall be fully responsible for the completedesign, fabrication, integration, QC inspection and testing of all the Gas Metering systemcomponents in accordance with AGA Report 9, Edition 2007 in minimum.

The Vendor shall perform a complete functional QC test of all the Gas Metering system

components before making the equipment available for the witnessed Factory QC AcceptanceTest (FAT). The FAT shall comprise testing of the performance of the Gas Metering system,with simulated instrument inputs.

All QC testing will be conducted in accordance with test procedures. The vendor shall furnishthe QC test procedures to the Purchaser for review at least 2 months prior to the FAT.

The vendor shall supply, at his cost, all necessary test equipment, tools, cables and personnelfor the duration of the QC tests. The system workstation, communication links and all otheraccessories shall be thoroughly QC tested to verify complete conformance with the scope ofwork and the project requirements.


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The vendor shall supply all QC test equipment conforming to the relevant standards andtraceable. Prior to testing the vendor shall provide valid certificates to confirm calibration of QC

test equipment.The FAT shall be performed at the Vendor’s facilities with a comfortable work environment andeasy access to all equipment.

A QC test log shall be maintained by the vendor to keep record of all tests carried out, anyfault, rectification work done, etc..

As minimum the FAT shall include the following:

Verification that the system is physically complete, in accordance with the projectmaterial requisition

Verification that the system has been assembled in accordance with the requirements of

this specification and the approved Vendor drawings Functionality QC testing to verify that the hardware and software configuration can

perform all functions required by this project.

All system inputs and outputs shall be simulated to determine the correct functionality ofthe system. This includes all FOC links, links to gas grid operator and hardwired signalsfrom/to ICSS and to gas grid operator.

Complete hardware QC testing (flow computers, supervisory computer, instruments,power supplies, I/O signals, all communication modules to/from ICSS, ESD signalsto/from ICSS, all interfaces to the Gas Grid Operator Company etc.), observation of faultreporting via hardware indicators and data transfers, and online component replacement.

Verification of diagnostic software. Verification that all system interfaces function correctly and reliably including FOC

interfaces with the control and monitoring system.

Verification of the serial numbers of all major components.

Verification of total uncertainty of sales gas metering package in different operatingmodes

The vendor shall at an agreed stage of the project prior to FAT, demonstrate the ability of theMetering System to communicate with other systems such as ICSS and SCADA of Gas gridoperator via the dedicated interfaces. The Vendor shall include in the quotation, a detailedproposal of how this will be achieved. The stage and integration requirements shall be

indicated on the fabrication, QC inspection and test plan to be submitted by the vendor forreview. It shall be the Vendor’s responsibility that all interfaces function correctly.

Any system components that fail during any phase of the QC testing shall be replaced notrepaired, without cost compensation.

Radio Frequency Interference QC Test shall be carried out with the cabinet doors open usingan RFI source and covering frequency levels to be specified during design. This shall notinterfere with the normal operation of the system and should not trigger any alarm when thereceiver is activated.

Deficiencies noted during QC FAT shall be corrected during the test and fully retested tocompany satisfaction. Any outstanding items that can’t be rectified and retested in the agreed


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FAT time scale shall be rectified at site and retested during SAT at the Vendor’s cost.Certification of completion of QC FAT including a list of outstanding deficiencies shall require

signature by the Company.QC Non Destructive Examination (NDE) shall be carried out in accordance with applicablereferenced codes and standards.

The vendor is to propose arrangements for QC testing, checking repeatability/accuracy and forproviding information detailing calibration and traceability to a recognised and agreed Authority.

Company reserves the right to inspect all stages of manufacturing/assembling/ QC testing ofthe equipment package at Vendor/Sub-Vendor shop.

Company shall have the right to reject any equipment non-conforming to the purchase orderand referenced specifications.

The Vendor shall carry out all specified QC testing and inspection required by contractualdocumentation, specifications, applicable codes & standards and the manufacturer’s qualitymanagement system. The Vendor shall retain all required records and documentationpertinent to these activities.

Acceptance criteria of QC tests, when not defined by the applicable codes, shall be specifiedby the Vendor in the Vendor Quality Control/Assurance Plans and/or QC test procedures andshall be sent to Company for review.

9.2 QC System Integration Test (SIT)

The purpose of the QC System Integration Test (SIT) is to check for the correct operation and

function of FOC communications links and all hardwired signals between the Metering Systemand the ICSS System. The SIT shall also include the test of the all signals transfer andcommunications links with the Gas Grid Operator. SIT to be performed as part of the QCFAT.

The SIT shall be carried out at the Metering System Vendor’s premises. The system shall beconnected in a manner identical to that which will exist on site and shall use the same systemconfiguration and software that will be used on site.

A detailed QC system integration test procedure for the SIT shall be provided as part of thedetailed design documentation of the sales gas metering package. The QC SIT procedureshall be agreed between Metering Vendor and Control System Vendor to ensure all interfaceswill be QC tested and fully operational when the SIT has been completed and QC test reportssigned off by the metering vendor, the ICSS vendor and the company or its representative.

9.3 QC Site Acceptance Test (SAT)

As minimum the QC SAT shall include the following: A complete audit of all equipment to verify that it has been received and does not have

any mechanical damage, loose parts, etc.

Verify that agreed minor outstanding items noted during QC FAT and QC SIT have beencorrected and tested.

Verification that the installation meets the Company specifications.

Verification that all equipment is fully functional tested.


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Verification that all communication links and interfaces operate correctly and havesuccessfully passed the QC SAT and the QC SIT on site.

Complete system power-up and testing of all network equipment, including the test of allinterfaces with SCADA system of Gas Grid Operation Company.

Finally Metering Run test with product as part of the final SAT. The SAT shall be completedonly with full operational test when gas plant brought into production with all relevant partiesand authorities present to sign off the final QC Site Acceptance Test Procedure aftercompletion of the final performance test.

9.4 Ultrasonic Meter Inspection

As a minimum all ultrasonic shall be inspected by a 3rd party during FAT to ensure compliancewith all approved calculations, documentation and material certifications.

The Meter Tubes shall be subject to a full hydrostatic pressure test in accordance with ASME B31.3.


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10 Vendor Data Requirements

The Vendor data requirements shall be as specified on the Vendor Data Requirements Form(VDRF) attached to the Material Requisition. The required number of reproducible and copiesshall be as specified.

An installation, operating and maintenance manual (IOM) and manufacturers record book(MRB) shall be provided as detailed in the material requisition..

10.1 Functional and Detail Design Specification (