3211 Liquid Flow Computer Rev 3 Date 18.02.08

7/27/2019 3211 Liquid Flow Computer Rev 3 Date 18.02.08

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Design Division Spec # 3211

Engineering Services Rev # 3

11 - High, Mumbai Discipline Instt.

ISO 9000: 2000

Functional Specifications

LIQUID FLOW

COMPUTER Page # 1 of 6

FORMAT No. Ref. PROCEDURE No. ISSUE No. REV. No. REV. DATE:

DD/SOF/004A/B DD/SOP/008 TO 015 02 01 01/08/2006

FUNCTIONAL SPECIFICATION

FOR

LIQUID FLOW COMPUTER

PREPARED /

REVISED BY REVIEWED BY

APPROVED

BY

TOTAL

No. OFPAGES

DATE

REV.

No.

VS SRS GRP 6 18.02.2008 3

AK BK GRP 9 28.03.2007 2

AK BK GRP 9 31.09.2006 1

ET MC AC 9 13.05.2003 0


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LIQUID FLOW



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CONTENTS

Clause No. ITEM Page No.

1.0 Scope of This Document 3

Codes and Standards 32.0

2.1 Reference specifications 3

3.0 Scope of Supply 3

Liquid flow computer 3

4.1 Purpose 3

4.2 General requirements 34.3 Type of liquid flow computer 4

4.4 Functional requirements 5

4.5 Materials 5

4.0

4.6 Accuracy 5

Annexure I Data Sheet Format 6


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1.0 SCOPE OF THIS DOCUMENT:1.1 This functional specification describes the essential design considerations for the

selection of Liquid flow computer for the intended service.

2.0 CODES & STANDARDS:2.1 Reference Documents and Specifications:

a) Instrumentation Design Criteriab) Basic Bid Workc) Project P & IDsd) Process Design Criteria / Instrument Process Data Sheets / Instrument List with

Process Parameters

3.0 SCOPE OF SUPPLY:3.1 The quantity to be supplied and installed shall be as per the requirements indicated

in the Basic Bid Work, Design Criteria and the P & IDs.3.2 The vendor shall be responsible for the selection of the Liquid flow computer

suitable for its intended application, its procurement, tagging, packing, testing &

calibration, preparation for shipment, along with accessories, spares, and assistance

where required for its installation & commissioning at site. This FS shall be read in

conjunction with the Instrument Design Criteria.

4.0 LIQUID FLOW COMPUTER:

4.1 PURPOSE:4.1.1 The purpose of a Liquid Flow Computer is to perform water cut as well as net oil

computation of the liquid at the liquid outlet of the test separator.

4.2GENERAL REQUIREMENTS:4.2.1 The Liquid Flow Computer shall be capable of computing and displaying, as a

minimum, the following: water cut percentage, densities of oil and water.

4.2.2 The Liquid Flow Computer shall be capable of calculating flow in accordancewith the latest edition of AGA and API Standards. The Liquid Flow Computer

shall use latest edition of AGA-3 for orifice flow calculations and latest edition

of AGA-8 for super compressibility calculations. The Liquid Flow Computer

software shall be capable of volume correction as per API standards.

4.2.3 The Wall Mounted Liquid Flow Computer shall be provided with a generalpurpose enclosure suitable for use in safe area.

4.2.4 The Field Mounted Liquid Flow Computer shall be provided with an enclosureintrinsically safe to IP 65. Necessary certifications shall be attached withPurchase Specification.

4.2.5 The Liquid Flow Computer shall be furnished with all the necessary weatherand anti-corrosion protection to prevent damage from saline and corrosive

process atmosphere.

4.2.6 For field mounting, mounting accessories required for Liquid Flow Computershall be 316SS or better. All instrument supports shall be galvanized prior to

installation.


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4.2.7 Power Supply:4.2.7.1 The Liquid Flow Computer shall operate on 24 V DC supply.4.2.7.2 The Liquid Flow Computer shall have sufficient battery back-up to retain data

for a minimum of 15 days. This back-up battery may be permanent type forfield-mounted units and shall be rechargeable type or permanent type for units

mounted in the safe area. In case the back-up battery is rechargeable type, a

battery charger that can operate on 24 V DC supply shall be provided. In case

the back-up battery in permanent type, the battery shall have a life of not less

than 2 years, in continuous service. Also one set of spare batteries shall be

provided for future requirement.

4.2.8 Inputs to the Liquid Flow Computer:4.2.8.1The Liquid Flow Computer shall be capable of accepting the following inputs as

required by the application:

4 20 mA signals Pulse inputs Digital inputs RTD inputs 0 5 V signals

The specific inputs that are to be connected to the Liquid Flow Computer shall

be as per the P & IDs.

4.2.9 Outputs from the Liquid Flow Computer:4.2.9.1The Liquid Flow Computer shall be capable of generating the following outputs:

4 20 mA analog signals for communication with TIC

Digital signals for communication with TIC RS 232 output port for communication with data logger, wherever provided

The specific outputs that are required from the Liquid Flow Computer shall be

as per the P & IDs and the process requirements.

4.2.10 Display Requirements:4.2.10.1 The Liquid Flow Computer shall provide 2 lines of alphanumeric display with

16 characters per line as minimum. The display shall be LCD type.

4.2.10.2 The Liquid Flow Computer unit shall have a user-friendly keypad for selectionof functions and displays. Calling up a function or a display shall not require

more than 3 key presses. The keypad shall suitable for performing simple

programming / customization of the Liquid Flow Computer software. It shall

be possible to configure certain keys on the keypad for launching quickfunctions.

4.2.11 Self Diagnostics:4.2.11.1 The Liquid Flow Computer shall be capable of performing self-diagnostics of

the electronics and of the software. It shall also provide relevant error display.

4.3TYPES OF LIQUID FLOW COMPUTERS:4.3.1 The Liquid Flow Computer may be either Wall-MountedorField-Mounted.


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4.3.2 The Wall Mounted Liquid Flow Computershall be mounted in the TIC room,i.e. safe area.

4.3.3 TheField Mounted Liquid Flow Computershall generally be mounted as perthe approved area classification on the platform. The Field Mounted LiquidFlow Computer may be of the following types:

With integral solar cells: This type of Field Mounted Liquid Flow Computershall be provided where power availability is a constraint.

Without integral solar cells: This type of Field Mounted Liquid FlowComputer shall be provided where power is available from the existing / new

power supply system.

4.3.4 In case the Field Mounted Liquid Flow Computer has to cater to only one setof flow parameters (i.e. 1 Differential Pressure value, 1 Upstream Pressure Value

and 1 Temperature value for compensation), then aLiquid Flow Computer with

integral multi-variable sensor may be used. In this case, the temperature

transmitter shall not be in the scope of supply of the Liquid Flow Computervendor. The maximum DP range of the Multi Variable Sensor shall be 150-inch

water column. The static pressure range shall be 500-psi maximum. The process

connection shall be 1/2 NPTF vertical plane bottom connection.

4.4FUNCTIONAL REQUIREMENTS:4.4.1 The Liquid Flow Computer shall be capable of archiving data for a minimum of

15 (fifteen) days for a minimum of 15 (fifteen) points.

4.4.2 The time interval of data capturing / frequency of data logging shall be user-programmable with standard 1 hour, 10 minutes and 1 minute intervals.

4.4.3 The Liquid Flow Computer shall be capable of providing data of trends displaysover user selectable time base.

4.4.4 The Liquid Flow Computer shall have facility for changing the range selection,multiplication factor, etc.

4.5MATERIAL:4.5.1 The material requirements for Liquid Flow Computer shall in general be

according to clause 3.6.4.5 of Instrumentation Design Criteria.

4.5.2 The enclosure material of the Liquid Flow Computer shall be Manufacturerstandard. However, it shall be certified for use in classified area if the Liquid

Flow Computer used in field-mounted type.

4.5.3 Wherever a multi-variable sensor type Liquid Flow Computer is used, thematerial of the sensor shall be compatible with the process fluid and shall be SS

316 minimum. Wherever the process demands NACE compliance, the same

shall be provided. The process flanges for the multivariable sensor shall be CS

minimum.

4.6ACCURACY:4.6.1 The accuracy of the Liquid Flow Computer shall be 0.1% or better.


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ANNEXURE I : DATA SHEET FOR LIQUID FLOW COMPUTER

LIQUID FLOW COMPUTER

UNITS: Flow Liquid M3/HR. Gas NM3/HR. Pressure Kg/cm2 Temperature oC Level/Length - M

1 Tag Number

Display Capability:

a) Instantaneous Flow Data Yes / No

b) Compensated Flow Data Yes / No

c) Cumulative Flow Data Yes / No

d) Compensation Parameters Yes / No

GENERAL

2

e) Others (Specify)

3 Wall Mounted Yes / No

Field Mounted Yes / No

a) With Integral Solar Cell Array Yes / No

b) Without Integral Solar Cell Array Yes / No

TYPE OF LIQUID

FLOW COMPUTER

4

c) With Integral Multi Variable Sensor Yes / No

Display:

a) No. of lines of display

b) No. of characters per line

5

c) Alphanumeric display Yes / No6 Programmable Keypad Yes / No

LIQUID FLOW

COMPUTERCHARACTERISTICS

7 Self Diagnostics Yes / No

8 Power Supply

9 Battery Back-Up TypeRechargeable /

Permanent

10 If Permanent Battery, life of battery

11 One set of spare battery provided Yes / No

POWER SUPPLY &

BATTERY BACK-UP

12If Rechargeable Battery, Battery Charger

providedYes / No

13 4 20 mA signal (mention quantity of such I/O)

14 Pulse inputs (mention no. of such I/O)

15 Digital inputs (mention no. of such I/O)

16 RTD inputs (mention no. of such I/O)

17 0 5 V signal (mention no. of such I/O)

INPUT TO LIQUID

FLOW COMPUTER

18 Others, if any, with no. of such I/O

19 4 20 mA signal (mention no. of such I/O)

20 Digital inputs (mention no. of such I/O)

21 Communication Port (i.e. RS-232, etc.)

OUTPUT FROMLIQUID FLOW

COMPUTER22 Others, if any, with no. of such I/O

23 No. of days for which data can be storedDATA ARCHIVING

24 Frequency of data logging permissible

25 EnclosureMATERIAL

26 Multi Variable Sensor, if provided

ENCLOSURE 27 Rating

ACCURACY 28 Liquid Flow Computer Accuracy

29 Fluid State

30 Flow Min. Maximum

31 Flow Normal

32 Inlet Pressure Operating Maximum

33 Temperature Operating Maximum

34 Sp. Gr. At Oper. Temp.

35 Molecular Weight

36 Operating Viscosity (CP)37 Allowable pressure drop

SERVICECONDITIONS

38 Corrosive Content

39 IS Certification

40 Manufacturer

41 Model NumberITEM DETAILS

42 Remarks

NOTE ;-VENDOR SEAL AND SIGNATURE

3211 Liquid Flow Computer Rev 3 Date 18.02.08

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Transcript of 3211 Liquid Flow Computer Rev 3 Date 18.02.08