exxon mobil standard pid
DESCRIPTION
Standard P&ID symbolsTRANSCRIPT
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Standard for Piping andInstrumentation Drawings
GP 01-87-01
Version 1
March 2002
Scope
This Global Practice (GP) contains ExxonMobil Pipeline Company's (EMPCo) standard governing Pipingand Instrument Diagrams (P&ID) for layout and other requirements; piping, equipment, and instrumentdesignations (letters, numbers, and symbols); and piping, equipment, and instrumentation information.
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GP 01-87-01 Standard for Piping and Instrumentation Drawings March 2002
All Business Sectors ExxonMobil Pipeline Company Page 2 of 55For ExxonMobil Use Only Version 1
Table of Contents
Table of Figures.......................................................................................................................... 4
Table of Tables............................................................................................................................ 6
1. Required References ....................................................................................................... 7
1.1. Global PracticesExxonMobil Engineering Practices........................................ 71.2. ASMEAmerican Society of Mechanical Engineers .......................................... 71.3. IEEEInstitute of Electrical and Electronics Engineers ..................................... 71.4. ISAInstrumentation, Systems, and Automation Society.................................. 71.5. ABNTAssociao Brasileira De Normas Tcnicas .......................................... 8
2. Additional Requirements ................................................................................................ 8
3. Purpose ............................................................................................................................... 8
4. P&ID Overview................................................................................................................... 9
4.1. Readability................................................................................................................ 94.2. Compliance/New Symbols or Identifications ....................................................... 94.3. General P&ID Requirements ................................................................................. 9
5. Layout Requirements.....................................................................................................10
5.1. General....................................................................................................................105.2. P&ID Separation....................................................................................................105.3. Arrangement...........................................................................................................105.4. Direction..................................................................................................................12
6. Primary Piping..................................................................................................................12
6.1. Piping Description .................................................................................................126.2. Line Number and Piping Description..................................................................13
7. Equipment Designation.................................................................................................26
8. Instrument Symbols and Identification .....................................................................31
8.1. General....................................................................................................................318.2. Functional Identifications ......................................................................................328.3. Balloons and Other Instrument Symbols ...........................................................378.4. Valves......................................................................................................................398.5. General Instruction for Flow Computers ............................................................408.6. Pump Unit Lockout Devices.................................................................................41
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9. Function Designations ..................................................................................................42
10. Loop Identification..........................................................................................................44
10.1. Loop Number..........................................................................................................4410.2. Loop Identity...........................................................................................................44
11. P&ID Examples ................................................................................................................48
Record of Change....................................................................................................................54
Attachment: Purpose Codes Definitions ..........................................................................55
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Table of Figures
Figure 1: Flow Sheet Format................................................................................................11
Figure 2: Line Size and Pressure Rating ..........................................................................12
Figure 3: Line Number Description ....................................................................................15
Figure 4: Instrument Identification.....................................................................................31
Figure 5: Other Information Added to Balloon................................................................32
Figure 6: Instrument Representation.................................................................................37
Figure 7: Instrument Tagging ..............................................................................................37
Figure 8: Additional Valve Information .............................................................................40
Figure 9: Flow Computer ......................................................................................................41
Figure 10: Unnecessary Function Designation ..............................................................42
Figure 11: Identification Letters Ending with "Y"...........................................................42
Figure 12: Protective Devices on Pumping Unit.............................................................42
Figure 13: Loop Identification..............................................................................................44
Figure 14: Single Loop (Closed) .........................................................................................45
Figure 15: Single Loop (Open).............................................................................................45
Figure 16: Instrument Common to Two or More Loops ...............................................46
Figure 17: Instrument Common to Two+ LoopsNo Loop Priority ...........................47
Figure 18: Combination of Two or More Loops..............................................................47
Figure 19: Instrument Performing Two or More Functions .........................................48
Figure 20: Pipeline Pump Station .......................................................................................49
Figure 21: Pipeline Meter Station........................................................................................49
Figure 22: Typical Tank Farm Flow Sheet........................................................................50
Figure 23: Typical Loading Rack Flow Sheet..................................................................51
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Figure 24: Turbine Meter with Digital Control Valve......................................................52
Figure 25: P.D. Meter with Mechanical Preset.................................................................52
Figure 26: Storage Tank........................................................................................................53
Figure 27: O/W Separator......................................................................................................53
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Table of Tables
Table 1: Service and Product Abbreviation .....................................................................14
Table 2: Line Symbols ...........................................................................................................16
Table 3-A: Valves, Fittings, and Equipment Symbols ...................................................17
Table 4: Equipment Designations ......................................................................................26
Table 5: Required Equipment Specifications ..................................................................28
Table 6: Functional Identifications.....................................................................................33
Table 7: Instrument Symbols ...............................................................................................38
Table 8: Pump Unit Lockout Devices and Set Points....................................................41
Table 9: Function Designations Commonly Used by EMPCo ....................................43
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1. Required ReferencesThis Section lists Practices and Standards that are referenced and assumed to be a part of this document.Unless otherwise specified herein, use the latest edition.
1.1. Global PracticesExxonMobil Engineering Practices
GP 01-77-01 Drawing Format and Numbering
1.2. ASMEAmerican Society of Mechanical Engineers
ASME Y32.11 Graphical Symbols for Process Flow Diagrams in the Petroleum andChemical Industries R(1998)
1.3. IEEEInstitute of Electrical and Electronics Engineers
IEEE C37.2 Standard Electrical Power System Device Function Numbers and ContactDesignations (ANSI/IEEE)
1.4. ISAInstrumentation, Systems, and Automation Society
ISA 5.1 Instrumentation Symbols and Identification
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||Start Pipeline Americas South Only
1.5. ABNTAssociao Brasileira De Normas Tcnicas
ABNT NBR 8190 Simbologia de Instrumentacao
ABNT NBR 8896 Simbolos Graficos Para Sistemas e Componentes Hidraulicos ePneumaticos - Simbolos Basicos e Funcionais
End Pipeline Americas South Only||
2. Additional RequirementsVendor shall comply with all local, state, and federal rules and regulations.
||Start Pipeline Americas South OnlyDimensions, nomenclatures, and symbologies may also be expressed in local language and standard units(e.g., Decimal Metric System) and/or other, depending upon local legal or common standards used byindustry.
End Pipeline Americas South Only||
3. PurposePiping and Instrument Diagrams (P&ID) are an Operations Integrity Management System (OIMS)required document of a facility's equipment and operation. As control documents, they are required byOIMS to be kept up to date, accurately reflecting a facility's current equipment and operation. In additionthey serve as the primary design documents for Engineering to:
1) Communicate project design requirements (e.g., scope of work, the concept of control and operation,safety, equipment, piping requirements, instruments, etc.) with outside consultants, vendors,management, operational personnel, etc.
2) Aid in the initial design phase by surfacing concept flaws that could result in needless and costlydesign errors
3) Coordinate the specification and procurement of all materials
4) Precipitate the ideas of all designers and management into a common objective
5) Use as a HAZOP review, start-up, and operating tool, as well as a document of record for in-placefacilities
6) Provide a basis for making equipment take off, equipment tagging, and equipment data lists
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4. P&ID Overview
4.1. ReadabilityThe P&ID should be simple and easy to read. It is intended to provide sufficient information to enableanyone to understand the operating concept without going into all the details of instrumentation.Therefore, the internal component or detailed specification of the instrument should be left out of theP&ID.
4.2. Compliance/New Symbols or Identifications1) The P&ID should be prepared in accordance with this Global Practice. The Engineer must not create
any symbols, identifications, or abbreviations.
2) If new symbols or identifications are needed, the Engineer shall define them in accordance with ISA5.1 and this GP and secure approval from the ExxonMobil Pipeline Standard Steering Committeeprior to the application.
4.3. General P&ID Requirements1) The P&ID should show all major equipment, piping, instrumentation, brief control and operating
logic, and all safety devices, including installed spares. However, it is common practice to omitcommon instruments, such as relays, switches, alarms, light indications, on and off controls, etc.,unless they provide a key function.
2) The system flow should enter from the left and exit to the right side of a drawing.
3) The scraper trap should be included in the station P&ID.
4) The OCC instrument or equipment should not be shown on the P&ID. Only the telemetered signalsfrom or to OCC should be shown on the P&ID.
5) If a project is to upgrade the existing facility for which no P&ID has been prepared, the Engineermust prepare a new P&ID to reflect both the existing and new facilities. New equipment and/or logicto be added to the existing P&ID should be "bubbled" or "clouded" to highlight what is new. The"bubble" is a series of connected curved lines. A revision number should be placed within the"bubble."
6) Brief specifications for all major pieces of process, electrical, and mechanical equipment should beincluded in the P&ID (see Section 5 for details).
7) Prior to design review and/or HAZOP review, a preliminary P&ID should be essentially completewith all operating logic, equipment specification, design parameters, and safety devices, and it shallbe approved before other drawings (except plot plan) are begun. An "As-Built" P&ID shallincorporate all the changes that have been made during details design or construction.
8) If spare is available, insulation and heat tracing requirements should be indicated for all equipment,instrumentation, and piping. The insulation and tracing data should include the thickness, type, andpurpose for the insulation (e.g., personnel protection, energy conservation, process stability, steamtracing, electric tracing, etc.).
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5. Layout Requirements
5.1. GeneralWhere a piece of equipment contains complex auxiliary systems (e.g., a vapor recovery unit), thesesystems may be drawn on separate P&ID to avoid congestion.
5.2. P&ID Separation1) If enough space is not available to include all necessary information in one drawing, the P&ID may
be separated into several sheets of the drawings as follows:
a) Tank farmb) Pump(s) and related control and piping manifoldc) Loading rack
d) Auxiliary systems i) Vapor recovery/combustion system ii) Off spec product system
2) The number of pieces of equipment per P&ID should be limited to logical groupings per the above. Ifthis results in congestion and/or precludes adequate space for design evolution and/or future revision,subgrouping should be considered.
3) Interconnecting lines from sheet to sheet (i.e., primary piping, instrument lines, etc.) shall be laid outso that they line up from one sheet to the next. Each line should have a connector that referencesassociated lines on the next or previous drawings.
4) To avoid congestion and provide space for design evolution and future revision, utility and auxiliaryservice systems may be shown on separate drawings. Primary piping P&ID tie-ins and take-offs toutility and auxiliary service system P&ID are indicated with a note or abbreviation.
5.3. Arrangement1) Arrangement of equipment, instruments and piping on drawings is to be done in tiers as follows:
a) Tier 1 (Top): Process equipment such as vessels, tanks, provers, heat exchangers, heaters, filters,and instruments such as flow computer
b) Tier 2 (Middle): Primary piping, in-line equipment, and associated instrumentationc) Tier 3 (Bottom): Transfer equipment such as pumps, compressors, etc.
2) See Figure 1 for examples of arrangement.
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Figure 1: Flow Sheet Format
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(Click on figure for horizontal view.)
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5.4. Direction1) Direction of flow shall be shown on all lines.
2) Corners of flow lines should be square. Crossings should be avoided wherever possible. Horizontalprimary flow lines have priority. Therefore, the vertical primary flow lines are shown broken at thecrossings. Vertical flow lines have priority over horizontal instrument signal lines and are not to bebroken at the crossings. Secondary lines, including instrument, shall follow the same convention withrespect to each other, as shall primary flow lines.
3) Primary flow lines inside the P&ID are shown by solid arrows, while the lines entering or leaving theP&ID are shown by hollow arrows with the appropriately referenced P&ID Number or Line Number(see Table 2).
4) Utility and service flows are an exception to the above. These flows should be drawn with a line anddenoted with type of supply as shown in Table 2 (see Section 6.2 for line numbers).
5) To facilitate reading the P&ID, the primary flow lines should be identified using a heavy weight line.Noticeably lighter weight lines should be used for all other lines and symbols (see Table 2).
6. Primary Piping
6.1. Piping DescriptionAll primary piping should be described with the following information when applicable:
1) Line size and pressure ratingchanges in pressure rating (spec break) should be shown by a dottedline perpendicular to the pipe at the spec break, with each side of the line labeled with the appropriatepressure rating (see Figure 2 for an example)
Figure 2: Line Size and Pressure Rating
ANSI 300 ANSI 6006"
2) Line number, if necessary, at the entry and exit of P&ID (see Section 6.2)
3) Flow rates and pressures of process media at the entry and exit of P&ID
4) Material specification for special piping, such as low temperature piping, etc.
5) Reference drawing number if appropriate
6) Operating data of utilities, such as instrument air, steam, flare connection, etc.
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6.2. Line Number and Piping Description
6.2.1. Line Number
1) Since most projects are simple and require one or two sheets of P&ID, the system flow can be easilyunderstood without the piping number. It may be needed for a major project that requires three ormore sheets of P&ID.
2) A complete line number consists of the information described in Figure 3.
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Table 1: Service and Product Abbreviation
Service Service
AS Air supply PB Pumpback
FL Fill line RK Loading pump to rack
DO Diesel off loading RD Rack drainage
DR Diesel refueling SD Storm drain
EA Exxon additive supply SL Slop line
EO Exxon additive off loading ST Suction tank to loading pump
?A Other additive supply SW Swing line
?O Other additive off loading TM Transmix (interface)
OS Offspec Product VL Vapor Line
OX Oxygenate VR VRU Return line
CW Cooling Water VS VRU Supply line
D Drain or Sump WS Water Supply
F Flare FW Fire Water
GS Gas Supply IS Instrument Air
HS Hydraulic Fluid Supply NS Nitrogen Supply
SC Steam Condensate SS Steam Supply
Product Product
B Brine C Crude Oil
UP Unleaded Premium KERO Kerosene
UI Unleaded Intermediate AVGAS Avgas
UR Unleaded Regular TFA Jet A
LR Leaded Regular #6 #6 Oil
D1 Diesel #1 OX Oxygenate
D2 Diesel #2 MTBE MTBE
HO1 #1 Heating Oil ETH Ethanol
HO2 #2 Heating Oil IPA Isopropyl Alcohol
FG Fuel Gas LPG LPG
LUO Lube Oil N Inert Gas
Note: (?) Question mark shall be replaced with prefix letter representing the name of other companiesat a given terminal.
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Figure 3: Line Number Description
10"-C-407-600-F
-PIPE SIZE
-SERVICE/PRODUCT (TABLE 1)
-LINE NO. IN SEQUENCE
-PRESSURE RATING
-END CONNECTION(FLANGED OR SCREWED END)
6.2.2. Piping DescriptionThe following piping designations are to be included on the P&ID:
1) Line number (per Table 1 and Section 6.2.1.) should go from:a) equipment to equipmentb) equipment to another line
c) line to line, such as bypassd) line size change to equipment, another line, or another line size change
2) Line symbols per Table 2
3) Piping, valves, fittings, and equipment symbols per Table 3
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Table 2: Line Symbols
PROCESS LINEABOVEGROUND
SECONDARY/UTILITYABOVEGROUND
INSULATED LINE(2 IN. THICK)
FLOW ARROWPRIMARY/PROCESS
PROCESS DATA FLOW,PRESSURE, TEMPERATURE,ETC.
ELECTRICAL LINE
HYDRAULIC LINE
CAPILLARY LINE
2"
PROCESS LINEUNDERGROUND
SECONDARY/UTILITYUNDERGROUND
INSULATED LINEWITH HEAT TRACE
FLOW ARROWSECONDARY/INSTRUMENTS
PAGE CONNECTORCONTINUATION OF PROCESS,SIGNALS AND UTILITY LINESDRAWING REFERENCE NUMBER
PACKAGED SKID SYSTEM
PNEUMATIC LINE
SOFTWARE OR DATALINK
P&ID SHEET NO.
2"
LINE SYMBOLS
PNEUMATIC BINARYSIGNAL
ELECTRIC BINARYSIGNAL
MECHANIAL LINKELECTROMAGNATIC ORSONIC SIGNAL (GUIDED)
ELECTROMAGNATIC ORSONIC SIGNAL (NOTGUIDED)
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Table 3-A: Valves, Fittings, and Equipment Symbols
VALVES
PLAIN END(SOCKETWELD ORTHREADED)
FLANGED END
NOTES:1. ALL VALVE SYMBOLS SHOWN BELOW CAN BE PLAIN END OR FLANGED END PER
EXAMPLES SHOWN ABOVE.
2. VALVES SHOWN ARE ACTUAL SIZE FOR PRIMARY PIPING. VALVES FOR SECONDARYPIPING AND INSTRUMENTS SHALL BE SHOWN AT 75% THE SIZE OF VALVES SHOWNHERE.
NC
GATE VALVE
GLOBE VALVE
PLUG VALVE
DOUBLE BLOCK &BLEED VALVE
THREE-WAYVALVE
CHECK VALVE
WAFERVALVE
BALL VALVE
MULTIPORTVALVE
ANGLE CHECKVALVE
ANGLE VALVE
FOUR-WAY VALVE ORMETER PROVERVIVERTER VALVE (MPDV)
METERING OR HANDTHROTTLE VALVE
ORBIT VALVESEAL END
PRESSURE VACUUMBREATHER VALVE
PSV108
000 000
PRESS. VAC.
PRESSURE SAFETY ORRELIEF VALVE
PSV109
000
PSV110
000 VACUUM SAFETY VALVE
PSV111
000SPRING LOADEDPRESSURE RELIEF VALVE(FLOW THROUGH PATTERN)
PSV112
000 RUPTURE DISC(PRESSURE)
PI118
EXCESS FLOW VALVE
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Table 3-B
VALVE ACTUATOR SYMBOLS
EH
DOUBLE ACTING PISTONACTUATED VALVE(HYDRAULIC SIGNALSHOWN)
SPRING-OPPOSEDSINGLE-ACTINGPISTON ACTUATEDVALVE
PRESSURE REDUCINGREGULATOR SELF-CONTAINED
PRESSURE REDUCINGREGULATOR WITHEXTERNAL PRESSURETAP (UPSTREAM TAP -BACK PRESSUREVALVE)
BACK PRESSUREREGULATOR SELF-CONTAINED
BACK PRESSUREREGULATOR WITHEXTERNAL PRESSURETAP
CONTROL VALVE WITHVALVE POSITIONER
CONTROL VALVE WITHHAND ACTUATOR
ELECTRO-HYDRAULICACTUATOR (SELFCONTAINED)
ELECTRIC LINEARACTUATOR
M
M ELECTRIC MOTOROPERATOR VALVE ACPOWER
MD.C.
ELECTRIC MOTOROPERATOR VALVE DCPOWER
DIAPHRAM ACTUATEDVALVE(PNEUMATIC SIGNALSHOWN)
S
SOLENOID VALVE
S
THREE-WAYSOLENOID VALVE
1 2
3
FLEX-FLO VALVE(SURGE RELIEF ORPRESSURE RELIEF)OR
HAND THROTTLEVALVE
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Table 3-C
FLOW ELEMENT SYMBOLS
ROTAMETER TYPEFLOW INDICATOR
ORIFICE PLATE WITHFLANGE TAPS
P.D. METER STACKWITH ATGTEMPERATURECOMPENSATOR, ANDPULSE TRANSMITTER,ON METER
VENTURI TUBE ORFLOW NOZZLE
FI101
FT102
FE102
FT103
TZ103
FE103
FE104
OR
FT104
FE104
FT105
FE105
TURBINE METER
FLOW STRAIGHTENINGPLATE
STRAIGHTENINGVANES
STATIC MIXER
FX106
FLOW SIGHT GLASSFG107
CORIOLIS METER
SONIC METER
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Table 3-D
PUMPS, COMPRESSORS, AND DRIVERS
HORIZONTALCENTRIFUGAL PUMPWITH ELECTRICALMOTOR DRIVE WITHFLEXIBLE COUPLING
ROTARY PUMP
ENGINE
TURBINE
VERTICAL INLINE
ROTARYCOMPRESSOR
BELT DRIVER
GEAR DRIVER
FLUID DRIVER (VARIABLESPEED) (I.E. AMERICANGYROL)
FLEXIBLE COUPLINGDRIVER
VERTICAL SUMPPUMP
VERTICAL CAN PUMP
1500 H.P.
RECIPROCATINGPUMP
CENTRIFUGALCOMPRESSOR
ELECTRIC MOTOR(THREE-PHASE)
GEAR DRIVENCENTRIFUGAL PUMPWITH ELECTRICMOTOR
P-2200 H.P.
500 H.P.
P-3
P-1100 H.P.
BELT DRIVENRECIPROCATINGPUMP WITH ENGINE
VERTICAL PUMPWITH VERTICALELECTRIC MOTORWITH FLEXIBLECOUPLING
BLOWER OR FAN
RECIPROCATINGCOMPRESSOR
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Table 3-E
TANKS
HORIZONTALSTORAGE TANK(BULLET TANK)
CONE ROOFTANK
DOUBLE DECKFLOATING ROOFTANK(EXTERNALFLOATING)
FLOATINGSUCTION
SPHERE TANK
VAPOR DOMETANK
FLOATING ROOFTANK WITHGEODESICDOME
T-3264
T-3262
T-3263
T-3265
T-3266
T-1
T-3267
SUMP TANK(NO EPCREGISTERNUMBER)
CONE ROOFTANK WITHINTERNAL PAN
PONTOONFLOATING ROOFTANK
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Table 3-F
MISCELLANEOUS FITTINGS
FLAME ARRESTOR
SPECTACLE BLINDOPEN
FLANGE
LINE CAP
REDUCER LINE BREAK
UNION
BLIND FLANGE
ADAPTOR WITH CAP
SPECTABLE BLINDCLOSED
OPEN DRAIN
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Table 3-G
LOADING ARMS AND OTHER MISCELLANEOUS EQUIPMENT
FLEXIBLE HOSE
HOSE WITHADAPTORFOR AVIATIONREFUELER
LOADING ARMASSEMBLYTORSION LOADERTYPE WITH DRYBREAK COUPLER
VAPOR HOSEWITH COUPLER
AIRPORTREFUELINGTRUCK
DISPENSER
"X" = D2 : DIESEL
"X" TRENCH (STRIP)DRAIN
TRANSPORT TRUCK
FIRE MONITOR
LOADING ARMASSEMBLYCOUNTERWEIGHT TYPE WITHDRY BREAKCOUPLER
AIRPORTFUELING HYDRANT
HOSEWITH COUPLER
LOADING ARMASSEMBLYTORSION TOPLOADING TYPE
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Table 3-H
FILTERS, STRAINERS, AND SEPARATORS
OIL/WATERSEPARATOR
VERTICAL BASKETSTRAINER
OWS 1
WATER PRODUCT
STR-1
STR-2
DIRTY
PRODUCT
FIL-1
CLEAN
FIL-2
FIL-3
FIL-2
HORIZONTALSCRAPER TRAP/STRAINER WITHQUICK CLOSURE
CYCLONESEPARATOR
Y-STRAINER WITHVALVE
HORIZONTAL FILTERWITH QUICKCLOSURE
VERTICAL FILTERWITH QUICKCLOSURE
HEAT EXCHANGERS, DRYERS, AND HEATERS
SHELL AND TUBEEX-1
FORCED AIR COOLED
EX-2
DESICCANT DRYERD-1
H-1
FUEL
FURNACE(FIRED OR BATHHEAT)
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Table 3-I
VRU, ABSORBERS, AND OTHER VESSELS
VRU
ABSORBERS
CARBONABSORBER
VERTICALDRUMSHORIZONTAL
DRUMS
SURGE RELIEFSUPPRESSOR
NOTES: Indicate approximate position ofinlet and outlet. If it is necessary to showthe internal parts, keep it simple.
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7. Equipment Designation1) All equipment should be designated with a combination of letters and numbers, as specified in Table
4. This letter designation should be placed next to the equipment symbol.
Table 4: Equipment Designations
Abbreviation Description Example
AB Absorber AB-1, AB-2
AD Adsorber (Carbon Bed) AD-1, AD-2
AI Additive Injector AI-1
B Booster Pump B-1 or B-101
BL Blower, Fan BL-1
C Compressor C-1, C-2
D Dryer D-1, D-2
EX Heat Exchanger, Condenser EX-1
FIL Filter FIL-1, FIL-2
OWS Oil/Water Separator OWS-1, OWS-2
P Pump P-1, P-101
PA Pump, Additive PA-1, PA-2
PB Pump Back/Offloading PB-1, PB-2
PS Pump, Sump PS-1, PS-2
PP Pump, Product to Rack PP-1, PP-2
STR Strainer STR-1, STR-2
SEP Separator Filter/Separator SEP-1, SEP-2
T Storage Tank T-101, T-102
Sump Tank
Slop Tank
V Process Vessel, Knockout drum V-1, V-101
VCU Vapor Combustion Unit VCU-1
VRU Vapor Recovery Unit VRU-1
2) The equipment symbols shall be in accordance with Table 3.a) Types of equipment, such as pumps, exchangers and drums, are to be numbered consecutively
with their respective equipment abbreviation letter prefix.
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b) If two or more pieces of similar equipment are in the same service, each is designated with asequence letter (A, B, C, etc.) following the equipment sequence number.
c) If identical equipment is shown on more than one P&ID, assign each piece of equipment its ownnumber. The first number is for the sheet number; the subsequent number is for the number ofthe equipment on that sheet. In multiple P&ID, three digit numbers are preferred, such as T-101(first tank in sheet 1) or T-201 (first tank in sheet 2).
3) Specifications for major equipment should be included in the top of the P&ID. As a minimum, theinformation listed in Table 5 should be included in the specification.
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Table 5: Required Equipment Specifications
Item Information Required Example
Pump Units Pump
Size (Inlet x Outlet x Impeller Size or Stroke Length),ANSI Pressure Rating, End Connection, Manufacturer,Model No., Number of stages, Type of Pump,Differential Pressure @ Rated Capacity (BPD)
Motor
HP, Manufacturer, Voltage, RPM, Frame No., Type ofDriver, Model Number
VFD or Speed Indicating Controller (SIC) (if installed)
Manufacturer, Voltage, HP rating
Register Numbers for Pump, Motor and VFD
10"x12"x15", ANSI 900RFFE, Bingham, MSD, 2 stg.,Centrifugal pump, 420 psi @120k BPD.
1250 HP, Westinghouse, 2300Volt, 3600 RPM, Frame6808H
Pump Register No. 39340
Motor Register No. 42901
Tanks 1. Size (Diameter x Height), Nominal Capacity,Manufacturer, Service, Roof Type (Floating Roof, ConeRoof, etc.), Critical Exposure Temperature (CET): XXF
2. Tank Number
105' dia. x 35' height, 45kbbls., Matrix, Unlead RegularGasoline, Floating Roof Tank,100 F. Max.
Tank No. 2345
Compressorand Driver
Compressor
Size (Inlet x Outlet), Pressure Rating, End Connection,Manufacturer, Model No., Type of Compressor, PowerRating, Capacity at Inlet condition, Max. DifferentialPressure and Temperature, Critical ExposureTemperature (CET): XX F, Anti surge device
Motor
HP, Manufacturer, Voltage, RPM, Frame No., Type ofdriver.
Register Numbers for Pump and Motor
Vessels 1. Size (Overall Dimensions), Nominal Capacity,Connection Size and Pressure Rating, DesignTemperature and Pressure, Service, Critical ExposureTemperature (CET): XX F
2. Register Numbers (large vessel only)
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Item Information Required Example
ControlValves
Valve
Body Size, ANSI Pressure Rating, End Connection,Manufacturer, Model No., Port size, Type of Trim,Services
Actuator
Manufacturer, Model No., Type of Actuator (Pneumatic,Hydraulic, etc), Signal Range, Type and Model No. ofTransducer and Valve Positioner if installed.
PressureRelief Valves
Body Size, Pressure Rating, End Connection,Manufacturer, Model No., Capacity at Set Pressure,Orifice size.
Prover Prover
Size (I.D. of barrel x calibration length x overall length),ANSI Class, Displacement Volume, Manufacturer, Typeof Prover (small volume, sphere, piston, etc),Manufacturer and Model Number for Proximity Switch.
4-Way Valve
Body Size, ANSI Pressure Rating, End Connection,Manufacturer, Model No., Type of Operator, OperatorManufacturer and Model No., and Actuation Time.
Register Number
Meter (otherthan Orifice)
Meter
Size, ANSI Class, End Connection, Manufacturer, ModelNo., Type of Meter, Construction Material, Maximumand Minimum Flow Rates, K-factor, Number of Pick-upsRange Mesh Size and Type
Register Number
OrificeMeter
Size, ANSI Class, End Connection, Manufacturer, ModelNo., Maximum and Minimum Flow Rates. PressureDrop in Inches of Water, Bore Size and Plate Material.
Computer Manufacturer, Model Number, Type
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Item Information Required Example
MotorOperatedValve
Valve Size, ANSI Pressure Rating, End Connection,Manufacturer, Model No., Type of Valve, Type ofOperator (AC, DC, Hydraulic, etc.), OperatorManufacturer and Model No., and Actuation Time.
Strainers Size, ANSI Class, End Connection, Manufacturer, ModelNo., Type of Strainer, Construction Material, Mesh Sizeand Type
Filter/Separator andFilters
Size, ANSI Class, End Connection, Manufacturer, ModelNo., Maximum Working Pressure and Temperature,Quantity and Size and Type of Element, ConstructionMaterial.
AirEliminators
Size, ANSI Class, End Connection, Manufacturer, ModelNo., Maximum Working Pressure
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8. Instrument Symbols and Identification
8.1. General1) The term "Instrument" applies to any device used directly or indirectly to measure a process variable
or to control a variable.
2) Each instrument should be identified by a system of letters (functional identification) and a system ofnumbers (loop identification), and each identification should be shown in a 1/2 inch circular balloon,as shown in Figure 4.
Figure 4: Instrument Identification
PCV214
1/2 IN. DIAMETER FOR INSTRUMENTSYMBOL OR TAG
FUNCTIONAL IDENTIFICATIONLOOP IDENTIFICATION
INSTRUMENTIDENTIFICATION
PCV-214 INDICATES THAT THE INSTRUMENT IS A PRESSURE CONTROLVALVE AND IT IS SHOWN ON SHEET 2, LOOP NO. 14 OF THE P&ID.
3) The letter designation for any instrument not shown in the list should be defined per Section 4.2. ofthis Global Practice.
4) Other pertinent information, such as instrument range, function designation or set point, may beadded to the circular balloon as shown in Figure 5.
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Figure 5: Other Information Added to Balloon
USE IT WHEN ABSOLUTELY NEEDED TO SHOWTHE INSTRUMENT RANGE.
LOCATE THE SYMBOL ANYWHERE NEAR THEBALLOON.
PT215
0-2000
RANGE BOX - APPROX. 1/4" X 5/8"
SHOULD BE LOCATED AT THE UPPERRIGHTHAND CORNER OF THEBALLOON.
PY216