DGT-W-DS-000-100-A-1 ( P & ID SYMBOL)

39
Public Works Authority Public Works Authority Public Works Authority Public Works Authority DRAINAGE AFFAIRS DRAINAGE AFFAIRS DRAINAGE AFFAIRS DRAINAGE AFFAIRS PROJECT DEPARTMENT P.O. BOX 22188 TEL. 4950000 & 4950999 FAX. 4317015 TEL. 4950000 & 4950999 FAX. 4317015 TEL. 4950000 & 4950999 FAX. 4317015 TEL. 4950000 & 4950999 FAX. 4317015 DOHA WEST SEWAGE TREATMENT WORKS DOHA WEST SEWAGE TREATMENT WORKS DOHA WEST SEWAGE TREATMENT WORKS DOHA WEST SEWAGE TREATMENT WORKS EXTENSION N° 3 EXTENSION N° 3 EXTENSION N° 3 EXTENSION N° 3 CIVIL PROJECT 627 PROJECT CODE DTC 0075 C1 BUDGET REFERENCE 1460010/11320 CONSULTANT CONTRACTOR SUB CONTRACTOR CIVIL DESIGNER IDENTIFICATI0N SYSTEM FOR P & I DRAWINGS ALL RIGHTS RESERVED FOR ALLCOUNTRIES ALL RIGHTS RESERVED FOR ALLCOUNTRIES ALL RIGHTS RESERVED FOR ALLCOUNTRIES ALL RIGHTS RESERVED FOR ALLCOUNTRIES DGT JOB NUMBER SIZE DATE DRAWN UP CHECKED APPROVED A4 13/06/06 TC GV PC EI 05 006 COMPANY FORMAT TYPE ZONE NUMBER REV. VERSION DOCUMENT STATUS COMMENTS STATUS DGT W DS 000 100 A 1 FI

Transcript of DGT-W-DS-000-100-A-1 ( P & ID SYMBOL)

  • P u b l i c W or k s A u t h o r i t yP u b l i c W or k s A u t h o r i t yP u b l i c W or k s A u t h o r i t yP u b l i c W or k s A u t h o r i t y D R A I N A G E AF F A I R SD R A I N A G E AF F A I R SD R A I N A G E AF F A I R SD R A I N A G E AF F A I R S

    P R O J E C T D E P A R T M E N T P.O. BO X 2 21 8 8

    T E L . 4 9 5 0 0 0 0 & 4 9 5 0 9 9 9 F A X . 4 3 1 7 0 1 5T E L . 4 9 5 0 0 0 0 & 4 9 5 0 9 9 9 F A X . 4 3 1 7 0 1 5T E L . 4 9 5 0 0 0 0 & 4 9 5 0 9 9 9 F A X . 4 3 1 7 0 1 5T E L . 4 9 5 0 0 0 0 & 4 9 5 0 9 9 9 F A X . 4 3 1 7 0 1 5

    DOHA WEST SEWAGE TREATMENT WORKSDOHA WEST SEWAGE TREATMENT WORKSDOHA WEST SEWAGE TREATMENT WORKSDOHA WEST SEWAGE TREATMENT WORKS EXTENSION N 3EXTENSION N 3EXTENSION N 3EXTENSION N 3 CIVIL PROJECT 627

    PROJECT CODE DTC 0075 C1 BUDGET REFERENCE 1460010/11320

    CONSULTANT

    CONTRACTOR

    SUB CONTRACTOR

    CIVIL DESIGNER

    IDEN TI FI CAT I 0N SY STE M FO R P & I DR AW INGS

    ALL RIGHTS RESERVED FOR ALL COUNTRIESALL RIGHTS RESERVED FOR ALL COUNTRIESALL RIGHTS RESERVED FOR ALL COUNTRIESALL RIGHTS RESERVED FOR ALL COUNTRIES

    DGT JOB NUMBER

    SIZE DATE DRAWN UP CHECKED APPROVED

    A4 13/06/06 TC GV PC EI 05 006

    COMPANY FORMAT TYPE ZONE NUMBER REV. VERSION DOCUMENT STATUS COMMENTS STATUS

    DGT W DS 000 100 A 1 FI

  • A.1 13/06/06 First Issue for Information T CLOUET G VERITE P CREANCIER

    r.v Date Aim of revision Drawn up by Checked by Approved by

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    SUMMARY

    1 PURPOSE..........................................................................................................................................5

    2 LIST OF PROCESS UNITS/ZONES................................................................................................6

    3 TAGGING STRUCTURE...................................................................................................................8

    3.1 DRIVES MECHANICAL EQUIPMENTS VALVES / INSTRUMENTATION - ETC......................8

    3.2 INSTRUMENT ..............................................................................................................................9

    3.3 PIPING .........................................................................................................................................9

    4 ELECTROMECHANICAL................................................................................................................10

    4.1 AERATORS & DIFFUSERS ........................................................................................................10

    4.2 MIXERS & DOSING....................................................................................................................10

    4.3 PUMPS.......................................................................................................................................11

    4.4 COMPRESSORS & BLOWERS..................................................................................................13

    4.5 CONVEYING & HANDLING ........................................................................................................14

    4.6 FILTERS & SEPARATORS.........................................................................................................16

    4.7 COMPACTING MACHINES ........................................................................................................17

    4.8 DRIVES & MOTORS...................................................................................................................18

    4.9 CHEMICAL REACTORS .............................................................................................................19

    4.10 TANKS, VESSELS......................................................................................................................20

    4.11 CIVIL ENGINEERING .................................................................................................................21

    5 MISCELLANEOUS ..........................................................................................................................21

    5.1 ELECTRICAL..............................................................................................................................21

    5.2 VARIOUS ...................................................................................................................................21

    5.3 SAFETY OR PROTECTION EQUIPMENTS...............................................................................22

    6 VALVES & FITTINGS......................................................................................................................23

    6.1 SHUT-OFF VALVES ...................................................................................................................23

    6.2 CONTROL VALVES....................................................................................................................25

    6.3 CHECK VALVES ........................................................................................................................25

    6.4 VALVES AND FITTINGS WITH SAFETY FUNCTION .................................................................25

    6.5 CONTROL ACTUATOR ..............................................................................................................26

    6.6 OTHER VALVES SYMBOLS ASSOCIATED ...............................................................................28

    6.7 FITTINGS ...................................................................................................................................28

    7 INSTRUMENTATION......................................................................................................................30

    7.1 INSTRUMENTATION CODIFICATION........................................................................................30

    7.2 ANALYSIS TYPE CODIFICATION ..............................................................................................31

    7.3 GENERAL INSTRUMENT or FUNCTION SYMBOLS ..................................................................32

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    7.4 SCALES .....................................................................................................................................32

    7.5 FLOW RATE PRIMARY ELEMENT SYMBOL .............................................................................33

    7.6 PIPING LINES ............................................................................................................................34

    7.7 PIPING LINES GRAPHICAL REPRESENTATION ......................................................................34

    7.8 OTHER GRAPHICAL SYMBOLS ................................................................................................35

    7.9 OTHER PIPING GRAPHICAL SYMBOLS ...................................................................................35

    7.10 MATERIAL CODIFICATION........................................................................................................36

    8 SETS GRAPHS and SKIDS............................................................................................................36

    8.1 SCRAPER BRIDGES AND OTHER METALLIC STRUCTURES..................................................36

    8.2 SKID MOUNTED UNITS ..........................................................................................................36

    8.3 QUANTITY SET..........................................................................................................................37

    9 INDEX...............................................................................................................................................38

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    1 PURPOSE

    The object of this document is to define the codifi cations and/or the symbols used for drawing a Proce ss and Instrumentation Diagram (P&I D).

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    2 LIST OF PROCESS UNITS/ZONES

    PROCESS NUMBERS PROCESS DESCRIPTION

    000 STORE EQUIPMENT

    401 INLET WORKS

    406 UPSTREAM MEASUREMENT

    411 SCREEN CHAMBER

    413 GRIT CHAMBER

    414 NEUTRALISATION

    422 GRIT TREATMENT

    424 SEPTIC WASTE TREATMENT

    432 STORM TANK

    439 STORM WATER TREATMENT

    471 ANCILLARY TANKS DISTRIBUTION

    472 AERATION TANK

    481 DEAERATION OF ACTIVATED SLUDGE

    482 CONVENTIONAL SECONDARY SETTLING

    488 ACTIVATED SLUDGE RECIRCULATION

    514 TERTIARY FILTRATION

    523 CHEMICAL DISINFECTION

    581 INTERMEDIATE PUMPING STATION

    589 CHLORINE CONTACT TANK

    592 DISCHARGE PUMPING STATION

    610 STORAGE OF LIQUID SLUDGE

    612 WASTE WASH WATER STORAGE

    623 THICKENING BY DRAINAGE

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    635 AEROBIC DIGESTION

    638 DIGESTED SLUDGE STORAGE

    639 AEROBIC DIGESTION EXISTING

    642 CENTRIFUGATION

    711 ACTIVATED SLUDGE AERATION

    713 AIR SCOUR FOR FILTER BACKWASH

    719 COMPRESSED AIR PRODUCTION

    732 CHEMICAL ODOUR CONTROL

    733 BIOLOGICAL ODOUR CONTROL

    813 POLYELECTROLITE POWDER and EMULSION

    821 FERRIC CHLORIDE

    836 CAUSTIC SODA

    842 HYDROCHLORIQUE ACID

    849 CITRIC ACID

    852 SODIUM HYPOCHLORITE

    854 CHLORINE TANK

    871 SODIUM BISULPHITE

    921 SITE DRAINAGE

    922 INDUSTRIAL WATER SUPPLY

    923 AIR FOR CONTROL

    924 POTABLE WATER NETWORK

    Graphic representation:

    411 SCREENING

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    3 TAGGING STRUCTURE

    Note : This structure enables to locate easily equipment in the plant.

    3.1 DRIVES MECHANICAL EQUIPMENTS VALVES / INSTR UMENTATION - ETC

    Process Equipment / Component

    4 8 2 _ _ Q P 0 0 1 A

    [1] [2] [3] [4] [5] [6] [7] [1] Process number : 3 digits corresponding to the treatment process number following engineering

    Nomenclature. (Refer to previous page)

    [2] Sub-process: 1 digit (A to Z or _) used in the case of 2 or more, similar processes on the P&I D. If there is no sub-process, we will use the digit "_".

    [3] Differentiation: 1 digit, numerical type (1 to 9) used in the case of several lines functioning in

    parallel in the same contract. A line can relate to several successive processes If there is no Differentiation, we will use the digit "_". [4] Equipment Family: 1 digit (A to Z) for materials. 1 or 2 digits (A to Z) for the instruments. [5] Equipment Sub-family 1 digit (A to Z or _), which specifies the equipment type for materials. 1 to 3 digits (A to Z or _) which specify the function of the instrument.

    If there is no sub-family, we will use the digit "_". Example : valve body without actuator V_ .

    [6] Sequence number: 3 numbers (examples: VA001, VH002, VM003; XH004, XB005, XD006; CP007,

    CS008, CV009). An equipment and all its accessories will have the same sequence number.

    [7] Equipment Identifier : 1 digit (A to Z or _) which makes it possible to identify several similar equipments

    working in the same process. In case of only one equipment, we will use the digit _ .

    3.1.1. Example Scraper bridge for secondary clarifier

    482__QP001A

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    3.2 INSTRUMENT

    pH

    AIT

    124A1 002A

    [8] [4 and 5]

    [1, 2 and 3]

    [6 and 7]

    3.2.1 Basic informations (see previous page) [1, 2 and 3] Location of the instrument, process, sub-process and differentiation. [4 and 5] Description of the instrument (1 to 5 digits), [6 and 7] Sequence number (3 numbers) and identifier (1 letter)

    3.2.2 Optional particular information. [8] Analysis type (pH, O2, etc.),

    3.2.3 Examples 124A1AIT002A

    472__LSLL001C

    3.3 PIPING

    3.3.1 Detail

    0 0 4 A _ E B R 0 5 0 0 A C X X 0 0 1 B

    [1, 2 and 3] [8] [9] [10] [6] [7]

    3.3.2 Basic information

    [1, 2 & 3] Pipe location, process, sub-process and Differentiation,

    [8] Fluid Codification (3 letters); [9] Piping nominal diameter in mm (4 numbers), [10] Piping material coding or material class (4 letters),

    [6] Sequence number (3 numbers),

    [7] Identifier (1 letter or _ ).

    3.3.3 Examples 004A_EBR0500ACXX001B

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    4 ELECTROMECHANICAL 4.1 AERATORS & DIFFUSERS

    Aerator

    AA

    Spraying nozzle

    AA

    4.2 MIXERS & DOSING

    Flat-blade paddle agitator (Paddle flocculator)

    AM

    Agitator

    AG

    Propeller agitator

    AG

    Dosing screw

    QF

    Static mixer

    QG

    Chlorinator

    QC

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    Pressure reducer unit Cl2

    QC

    4.3 PUMPS

    Pump

    PO

    Centrifugal pump

    PO Dynamic Pump

    Submersible pump

    MO

    PO

    Simple peristaltic pump

    PO Peristaltic pump

    Double peristaltic pump

    PO

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    Positive-displacement pump

    PO

    Reciprocating pump

    PO

    Diaphragm pump

    PO

    Displacement Pump

    Helical rotor pump

    PO

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    4.4 COMPRESSORS & BLOWERS

    Compressor

    CP

    Reciprocating compressor

    CP

    Blower

    CS

    Turbo compressor

    CP

    Silencer

    XQ

    Positive-displacement compressor

    CP

    Sound trap

    XQ

    Roller vane compressor

    CP

    Fan

    CV

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    4.5 CONVEYING & HANDLING

    Conveyor

    TD

    Belt conveyor

    TD

    Mobile belt conveyor

    TD

    Box truck

    TD

    Screw conveyor

    TD

    Industrial truck

    TD

    Truck 1

    See Cell STD_15

    Excavator cart

    Hoist

    TL

    Surface skimmer

    Overhead-travelling crane

    TL

    Lifting davit

    TL

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    Mural lifting unit

    TL

    Davit Base

    TL

    Monorail

    TL

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    4.6 FILTERS & SEPARATORS

    Gas filter / air filter

    FM

    Rotating mechanical screen device

    SD

    Mechanical screen device

    SD

    Grit washer / classifier

    SD

    Manual bar screen

    SD

    Gravity Belt Thickener

    SE

    Step screen

    SD

    Cartridge filter

    FA

    Tilting Bucket

    SD

    Filter

    FA

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    4.7 COMPACTING AND CENTRIFUGE MACHINES

    Screw type waste compactor

    SP

    Centrifuge

    SE

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    4.8 DRIVES & MOTORS

    Electric motor

    MO

    Combustion engine

    MO

    Motor reducer

    MO

    Reducer

    MO

    Motoreducer with variable speed motor

    MO

    Motor with variable speed reducer

    MO

    Variable speed motor (driven by frequency variator)

    sc

    MO

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    4.9 CHEMICAL REACTORS

    Column

    BA

    Deodorising column, top exit

    BA

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    4.10 TANKS, VESSELS

    Closed tank

    RF

    Dished-heads closed tank

    RF

    Dished-heads closed tank

    RF

    Conical-head closed tank

    RF

    Spherical closed tank

    RF

    Basin / tank

    Skip

    RB

    Drum

    Bag

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    4.11 CIVIL ENGINEERING

    Example of civil works

    DG

    5 MISCELLANEOUS

    5.1 ELECTRICAL

    Electrical cabinet

    IA

    Heating element

    EW

    5.2 VARIOUS

    Sampler of sample

    AP

    Manhole

    ZZ

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    5.3 SAFETY OR PROTECTION EQUIPMENTS

    Shower with eye-bath

    UD

    Shower

    UD

    Eye-bath

    UD

    Acoustic hood

    UB

    Automatic gate

    UD

    Sound alarm

    ZZ

    Visual alarm

    ZZ

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    6 VALVES & FITTINGS

    6.1 SHUT-OFF VALVES

    2 ways 2 ways

    Direct Angle 3 ways 4 ways

    Damper

    Valves

    V_

    V_

    V_

    V_

    V_

    Gate or knife gate valve

    V_

    Globe Valve

    V_

    V_

    Needle valve

    V_

    Operated with linear movement

    Diaphragm valve

    V_

    Ball or plug valve

    V_

    V_

    V_

    Rotary Stop Valve

    Butterfly valve

    V_

    Other Operation Pinch Valve

    V_

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    Telescopic valve

    V_

    Penstock

    VH

    VM

    VZ

    Stoplog

    VH

    Stoplog frame

    V_

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    6.2 CONTROL VALVES

    Control valve, continuously operated

    VH

    6.3 CHECK VALVES

    Check valve

    XC

    Swing Check Valve

    XC

    Ball-plunger check valve

    XC

    Nozzle check valve

    XC

    Note : the rotating point is always positioned upstream

    6.4 VALVES AND FITTINGS WITH SAFETY FUNCTION

    Safety valve

    XB

    Angle safety valve

    XB

    Disconnecteur

    Note: The heavy line indicates the outlet side

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    Rupture disk

    XE

    Breather valve

    XR

    6.5 CONTROL ACTUATOR

    NORM ISA S 5.1 Valve with automatic actuator ON-OFF: VA Valve with hand wheel: VH Valve with motor ON-OFF: VM Pilot valve: VY Self-contained valves VQ Regulator valve VZ Note: If the actuator is attached to a control valve, the codification comes from the instrumentation one.

    (See INSTRUMENTATION).

    VA VZ

    Diaphragm type

    Diaphragm type double-acting

    Cylinder type, single action

    Valve with automatic operation

    ON-OFF

    Cylinder type, double acting

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    VM VZ

    Motorized valve

    Electric motor type

    VH

    Valve with hand actuator

    Hand actuator

    VY

    Pilot valve Solenoid type

    VQ

    Float regulator

    Back pressure regulator, self-contained

    Counterweight type

    Regulator with external pressure

    Self-contained valves

    Spring type

    Differential pressure reducing regulator

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    6.6 OTHER VALVES SYMBOLS ASSOCIATED

    NORM ISA S 5.1

    Thermal insulation / laging

    Valve with jacket

    6.7 FITTINGS

    Sight glass

    XX

    Injection pipe

    XX

    Orifice Plate

    XO

    To drain

    XP

    Hydroejector

    XC

    Open air outlet for steam / gas /air

    XP

    Air / water Trap

    XP

    Air screen

    YE

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    Filters / Strainer

    XH

    Calibration pot

    Vessel

    XA

    Compensator

    Flanges

    Cap

    Quick coupling

    Flexible

    Concentric reducer, or general

    Eccentric reducer

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    7 INSTRUMENTATION

    Norm ISA-S5.1-1984 (R 1992).

    INSTRUMENTATION See Instrumentation library for details and examples of flowmeters and others instruments representation (Available on the Team Room)

    7.1 INSTRUMENTATION CODIFICATION

    FIRST LETTER SUCCEEDING LETTERS

    Measured or initiating variable

    Modifier Readout or passive function

    Output Function

    Modifier

    A Analysis Alarm

    B Burner, combustion Users choice Users choice Users choice C Conductivity (*) Control

    D Sp. Gravity (*) - turbidity concentration (**) density (*)

    Differential Fault (**)

    E Voltage Sensor (primary element)

    F Flow rate Ratio (fraction) G Users choice Glass, viewing device

    H Hand (manually initiated)

    High

    I Current (electrical) Indicate

    J Power Scan K Time, time schedule Time delay, time

    rate of change Control station

    Auto-man selection

    L Level Light Low M Moisture (*) Momentary Middle,

    Intermediate N Viscosity (*) Alimentation sensor User's choice User's choice

    O Users choice Orifice, restriction

    P Pressure, vacuum Point (test), connection Q Quantity Integrate, totalize

    R Radiation Record S Speed, frequency Safety Switch

    T Temperature Transmit U Multivariable Multifunction Multifunction Multifunction

    V Vibration, mechanical analysis

    Valve, damper, Louver

    W Weight, force Well

    X Unclassified X axis Galvanic insulation Unclassified Unclassified Y Event, state

    or presence Y axis Relay, compute, convert

    Z Position, dimension (Length)

    Z axis Driver, actuator, unclassified final control element

    Notes: (*) ISA = "User's choice" or " Unclassified ". (**) Degrmont's choice.

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    7.2 ANALYSIS TYPE CODIFICATION DO Dissolved oxygen

    CH4 Methane

    Cl Chlorides

    Cl2 Total chlorine

    CO Monoxyde de carbonne

    Redox Oxidation-reduction potential

    pH Hydrogen potential

    Tu Turbidity

    S.S. Suspended solids

    TOC Total organic carbon

    NH4 Ammonium

    NO3 Nitrate

    BOD Biochemical oxygen demand

    COD Chemical oxygen demand

    Cond Conductivity

    H2S Hydrogen sulphide

    02 Oxygen

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    7.3 GENERAL INSTRUMENT OR FUNCTION SYMBOLS

    7.3.1 General instrument or function symbols

    13 14 6TE

    2584-23011

    15 *

    Instrument with Long tag number

    Instruments sharing common housing

    16 17

    Pilot light Diaphragm Seal

    * It is not mandatory to show a common housing.

    7.4 SCALES

    Scale

    Weighing platform

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    7.5 FLOW RATE PRIMARY ELEMENT SYMBOL

    FlumeParshall

    Venturi tube

    Orifice plate in quick change fitting

    Averaging pitot tube

    Single port pitot tube

    Weir

    Turbine primary element

    Magnetic flowmeter

    Variable area flow indicator

    Thermal mass flowmeter

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    7.6 PIPING LINES 7.6.1 Products & Fluids Codification

    Please refer to Piping Classes Reference : DGT- W ST 000 100 7.7 PIPING LINES GRAPHICAL REPRESENTATION

    Main line

    Secondary line

    Utility

    Compressed air

    Electrical liaison

    Assembly limit

    Out of scope line

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    7.8 OTHER GRAPHICAL SYMBOLS

    Water surface

    Inlet / outlet arrow

    Fluid direction

    Lead flow label

    Limits of supply Change of material

    7.9 OTHER PIPING GRAPHICAL SYMBOLS Piping with jacket

    Piping insulated (thermal insulation / laging)

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    7.10 MATERIAL CODIFICATION

    Please refer to Piping Classes Reference : DGT ST 000 - 100

    8 SETS GRAPHS AND SKIDS

    8.1 SCRAPER BRIDGES AND OTHER METALLIC STRUCTURES

    Example of scraper bridge

    QP

    8.2 SKID MOUNTED UNITS

    SKID MOUNTED UNITS

    KI

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    8.3 QUANTITY SET

    QUANTITY SET

    see chapter TAGGING STRUCTURE )

    pp_ident-# Specifies components with a different ident. mark pp_sub_zone-# Specifies components with a different sub-zone. mark pp_diff-# Specifies components with a different diff. mark Ex: The illustration in the table shows that the following components are to be installed : Pumps: 001__PO001A 001__PO001B Motors: 001__MO001A 001__MO001B

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    9 INDEX A

    Acoustic hood............................... 22 Aerator .......................................... 10 Agitator ......................................... 10 Air / water Trap ........................... 28 Air screen...................................... 28 Angle safety valve........................ 25 Automatic gate ............................. 22 Averaging pitot tube..................... 33

    B

    Back pressure regulator , self-contained....................................... 27 Bag ................................................20 Ball or plug valve ......................... 23 Ball-plunger check valve ............. 25 Basin / tank ................................... 20 Belt conveyor................................ 14 Blower........................................... 13 Box truck ...................................... 14 Breather valve............................... 26 Butterfly valve.............................. 23

    C

    Calibration pot.............................. 29 Cap ................................................29 Cartridge filter .............................. 16 Centrifugal pump ......................... 11 Centrifuge ..................................... 17 Check valve .................................. 25 Chlorinator.................................... 10 Closed tank ................................... 20 Column with fixed bed ................ 19 Combustion engine ...................... 18 Compensator................................. 29 Compressor................................... 13 Concentric reducer, or general .... 29 Conical-head closed tank............. 20 Control valve, continuously operated......................................... 25 Conveyor....................................... 14 Counterweight type ...................... 27 Cylinder type, double acting........ 26 Cylinder type, single action......... 26

    D

    Davit Base..................................... 15 Deodorising column, top exit ...... 19 Diaphragm pump.......................... 12 Diaphragm type ............................ 26 Diaphragm type bouble-acting .... 26 Diaphragm valve .......................... 23 Differential pressure reducing regulator........................................ 27 Disconnecteur............................... 25

    Dished-heads closed tank ............ 20 Dosing screw ................................ 10 Double peristaltic pump............... 11 Drum............................................. 20

    E

    Eccentric reducer.......................... 29 Electric motor............................... 18 Electric motor type....................... 27 Electrical cabinet .......................... 21 Example of civil works ................ 21 Example of scraper bridge ........... 36 Excavator cart ............................... 14 Eye-bath ........................................ 22

    F

    Fan................................................. 13 Filter.............................................. 16 Filters / Strainer............................ 29 Flanges .......................................... 29 Flat-blade paddle agitator (Paddle flocculator).................................... 10 Flexible ......................................... 29 Float regulator .............................. 27 Fluid direction .............................. 35 FlumeParshall............................... 33

    G

    Gas filter / air filter....................... 16 Gate or knife gate valve ............... 23 GDD / GDE .................................. 16 GENERAL INSTRUMENT or FUNCTION SYMBOLS ............. 32 Globe Valve.................................. 23 Grit washer / classifier ................. 16

    H

    Hand actuator................................ 27 Heating element............................ 21 Helical rotor pump....................... 12 Hoist..............................................14 Hydroejector................................. 28

    I

    Industrial truck ............................. 14 Injection pipe ................................ 28 Inlet / outlet arrow........................ 35

    L

    Lead flow label ............................. 35 Lifting davit .................................. 14 Limits of supply Change of material ......................................... 35

    M

    Magnetic flowmeter ..................... 33

    Manhole ........................................ 21 Manual bar screen ........................ 16 Mechanical screen........................ 16 Mobile belt conveyor ................... 14 Monorail........................................ 15 Motor reducer ............................... 18 Motor with variable speed reducer....................................................... 18 Motoreducer with variable speed motor............................................. 18 Motorized valve (VM) ................. 27 Mural lifting unit .......................... 15

    N

    Needle valve ................................. 23 Nozzle check valve....................... 25

    O

    Open air outlet for steam / gas /air....................................................... 28 Orifice Plate.................................. 28 Orifice plate in quick change fitting....................................................... 33 Overhead-travelling crane............ 14

    P

    Penstock ........................................ 24 Pilot valve ..................................... 27 Pinch Valve................................... 23 Positive-displacement compressor....................................................... 13 Positive-displacement pump........ 12 Pressure reducer unit Cl2..... 11 Propeller agitator.......................... 10 Pump ............................................. 11

    Q

    Quick coupling ............................. 29

    R

    Reciprocating compressor............ 13 Reciprocating pump ..................... 12 Reducer ......................................... 18 Regulator with external pressure.27 Roller vane compressor................ 13 Rotating mechanical screen device....................................................... 16 Rupture disk.................................. 26

    S

    Safety valve .................................. 25 Sampler of sample ........................ 21 Scale ..............................................32 Screw conveyor ............................ 14 Screw type waste compactor ....... 17 Scum trough.................................. 16

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    Self-contained valves ................... 27 Shower .......................................... 22 Shower with eye-bath .................. 22 Sight glass..................................... 28 Silencer ......................................... 13 Simple peristaltic pump ............... 11 Single port pitot tube.................... 33 Skip ...............................................20 Solenoid type ................................ 27 Sound alarm.................................. 22 Sound trap..................................... 13 Spherical closed tank ................... 20 Spraying nozzle ............................ 10 Spring type.................................... 27 Static mixer................................... 10 Step screen.................................... 16

    Stoplog.......................................... 24 Stoplog frame ............................... 24 Submersible pump........................ 11 Surface skimmer........................... 14 Swing Check Valve...................... 25

    T

    Telescopic valve........................... 24 Thermal insulation / laging.......... 28 Thermal mass................................ 33 To drain......................................... 28 Truck 1 .......................................... 14 Turbine primary element ............. 33 Turbo compressor......................... 13

    V

    Valve with automatic operation... 26 Valve with hand actuator ............. 27 Valve with jacket .......................... 28 Valves ........................................... 23 Variable area flow indicator ........ 33 Variable speed motor ................... 18 Venturi tube .................................. 33 Vessel ............................................ 29 Visual alarm.................................. 22

    W

    Water surface ................................ 35 Weighing platform ....................... 32 Weir...............................................33