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PRESENTED BY:NAILA NISAR (07-CH-122)

SANA WAHID (07-CH-149)

AMNA REHMAN(07-CH-155)

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PIPING AND INSTRUMENTATION DIAGRAMS

y P&ID: is one of the important basic engineering documents inthe form of drawing which truly represents the process plant. It

shows pipelines interconnecting all equipment , instruments ,control systems, valves , etc. for the completeness of the processplant .

y Since detailed engineering work for any process plant dependsmore on the P & ID , its correctness and completeness is verymuch essential .Any wrong information provided in the P&ID at

the initial stage may lead to a big disaster or may entail heavyexpenses later .Hence ,great attention is required forthe preparation of error free P&ID .Good quality P& ID may cutthe engineering man hour requirement for the successfulcompletion of a project

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A P&ID IS A P&ID IS NOT

y Language of symbols

y Schematic of processy Communication tool

y Graphic table of contents

y Piping isometric

y Equipment fabricationdiagram

y Scale drawing

y Something to convey processinformation

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y Temperature indicator

y Pressure indicator

y Temperature sensor

y Pressure transmitter

y Combustion sensor

y Combustion switch

TI

TA22C

PIPT22

TE

BE

PT

BSFLAMDETC1

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y Butterfly valve

y Solenoid valve

y Gate valve

y Flow rate orifice

y Momentary flow ratemeasurement

y Control valve

FO

MFM

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y Temperature relays

y Three way valve

y Current to pneumatictransducer

TY

y Valve operators

y Ball valve

y Check valve

II/P

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yAnalyzer indicatortransmitter

y Speed transmitter

AIT

ST

SI

SPEE

y Speed indicator

y Current controller

ICIGNITC1

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y Voltage

y Heat exchanger

y Recuperator

y Stream direction

E

EMICO2

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