P & ID

P & I Diagrams * FFC Standards

* SnamProgetti D # 01-GD-A-06020

Tehseen Ahmad

Line Symbols

Tehseen Ahmad

Control Valves Symbols

Tehseen Ahmad

Control Valves Symbols

Tehseen Ahmad

Signal Converter Symbols

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Miscellaneous Symbols

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Miscellaneous Symbols

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Common Abbreviation Abbreviation

P

Full Name

Process

IW

Industrial Water 

MW

Treated Water 

PW

Demineralized

DW

Drinking

CW

Cooling

FW

Fire Water 

BFW KS

Water 

Water 

Water 

Boiler Feed Water  Very High

Pressure Steam Tehseen Ahmad

Common Abbreviation Abbreviation

Full Name

HS

High

Pressure Steam

MS

Medium Pressure Steam

LS

Low Pressure Steam

U A

Utilities Air 

 IA

Instrument Air 

UN

Nitrogen

IN

Instrument Nitrogen

FO

Fuel Oil

FG

Fuel

Gas Tehseen Ahmad

Common Abbreviation Abbreviation

Full Name

LR

Refrigerant Liquid

GR

Refrigerant Vapors

CH

Chemicals

BD

Blow Down

FI

Foaming Liquid

FS

Foaming Solution

SY

Oily Sewers

WY

Non-oily

CY

Sewers

 A Acid Sewers Tehseen Ahmad

Common Abbreviation Abbreviation

Full Name

BL

Battery Limit

KW

Very High

HW

High

LW

Low Pressure Flushing

CD

Closed Drain

CU

Urea Sewers

UW

Utilities Water 

WD

De- A Aerated

PQ

Purge Gas

Pressure Flushing

Pressure Flushing

Water 

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Common Abbreviation Abbreviation

Full Name

SN

Synthesis Gas

RW

Raw Water 

WW

Waste Water 

NY

Neutralized Water 

Tehseen Ahmad

Analyzers Abbreviation Abbreviation

 AR  ARC CR CO2R

Full Name

 Analyzer  Recorder   A Analyzer  Recorder  Controller  Conductivity

Recorder 

CO2 Recorder 

DC

Density Controller 

DR

Density

Recorder 

DRC

Density

Recorder  Controller 

H2R

H2 Recorder 

H2S

H2 S

MR

Humidity

Recorder  Recorder  Tehseen Ahmad

Analyzers Abbreviation Abbreviation

Full Name

O2 R

O2 Recorder 

pHR

pH Recorder 

pHRC pH Recorder  Controller  VR

Viscosity

Recorder 

Tehseen Ahmad

Level Abbreviation Abbreviation

Full Name

LC

Level

Controller 

LG

Level

Glass

LI

Level Indicator 

LIC

Level Indicator  Controller 

LR

Level Recorder 

LRC

Level Recorder  Controller 

hL A

High

Level Alarm

hLS

High

Level

hLSA

High

Level Alarm

lL A

Device

Shut-down Device & Shut-down Device

Low Level Alarm Device Tehseen Ahmad

Level Abbreviation Abbreviation

lLS

Full Name

Low Level

Shut-down Device

lLSA

Low Level Alarm & Shut-down

hlL A

High-Low

Level Alarm Device

hlLS

High-Low

Level

Device

Shut-down Device

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Flow Abbreviation Abbreviation

Full Name

FC

Flow Controller 

FE

Test Orifice Plate

FI

Flow Indicator 

FIC

Flow Indicator controller 

FR

Flow Recorder 

FRC FT

Flow Recorder  Controller  Flow Totalizer 

hF A

High

Flow Alarm Device

hFS

High

Flow

hFSA

High

Flow Alarm & Shut-Down Device

Shut-Down Device Tehseen Ahmad

Flow Abbreviation Abbreviation

Full Name

lF A

Low Flow Alarm

lFS

Low Flow

Shut-Down Device

lFSA

Low Flow Alarm & Shut-Down Device

hlF A

High

Low Flow Alarm

hlFS

High

Low Flow

rFR

Flow Ratio Flow Recorder 

rFRC

Shut-Down Device

Flow Ratio Flow Recorder  Controller 

Tehseen Ahmad

Pressure Abbreviation Abbreviation

Full Name

PC

Pressure Controller 

PI

Pressure Indicator 

PIC

Pressure Indicator  Controller 

PR

Pressure Recorder 

PRC

Pressure Recorder  Controller 

dPI

Differential

Pressure Indicator 

dPIC

Differential

Pressure Indicator  Controller 

dPR

Differential

Pressure Recorder 

dPRC

Differential

Pressure Recorder  Controller 

hP A

High

Pressure Alarm Device Tehseen Ahmad

Pressure Abbreviation Abbreviation

Full Name

hPS

High

Pressure Shut-Down Device

hPSA

High

Pressure Alarm & Shut-Down

lP A

Low Pressure Alarm

lPS

Low Pressure Shut-Down Device

Devi.

lPSA

Low Press. Alarm & Shut-Down Device

hlP A

High

Low Pressure Alarm Device

hlPS

High

Low Press. Shut-Down Device

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Temperature Abbreviation Abbreviation

Full Name

TE

Temp. Sensing Element

Th

Thermometer Indicator 

TI

Temp. Indicator 

TIC

Temp. Indicator  Controller 

TR

Temp. Recorder 

TRC

Temp. Recorder  Controller 

TW

Thermo well

hT A

High

Temp. Alarm

hTS

High

Temp. Shut Down Device

hTSA

High

Temp. Alarm & Shut Down Device Tehseen Ahmad

Temperature Abbreviation Abbreviation

Full Name

lT A

Low Temp. Alarm

lTS

Low Temp. Shut Down Device

lTSA

Low Temp. Alarm

& Shut Down Device

Tehseen Ahmad

Miscellaneous Abbreviation Abbreviation

Full Name

hZS

Limit Switch

³Valve

lZS

Limit Switch

³Valve Closed´

HS

Push Button

SG

Sight Glass

FV

Straightening Vanes

HC

Hand Control

WR

Weight Recorder 

PSD

Rupture

PSV

Pressure Safety Valve

Q A

 A Alarm

Open´

Disc

Point Tehseen Ahmad

Miscellaneous Abbreviation Abbreviation

Full Name

RO

Restricted Orifice

SR

Speed

XX

Generic

SI

Speed

 AmI

Recorder  Instrumentation

Indicator 

 Ammeter 

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Standard

P&I diagram

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Standard

P&I diagram

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