dgt-w-ds-000-100-a-1 ( p & id symbol)
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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
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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
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