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Reaction Outside Certification
PE_RXN-010_Reaction Area Utilities
Piping &
Instrumentation
Diagram (P&ID)
Main Menu
Learning Objectives
Introduction
Piping & Instrumentation
Diagram (P&ID)
Piping &
Instrumentation
Diagram (P&ID)
Learning Objective
 After completion of this training you will be
able to describe the main purpose of P&ID.
 You will be able to explain why it is important
for you to get this training.
 The training will enable you to understand how
to read & understand P&ID. Also it will enable
you to perform your task safely & effectively.
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
Main Menu
Learning Objectives
Introduction
Piping & Instrumentation
Diagram (P&ID)
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
Introduction
We have learnt about Process Flow Diagrams that it simplify the
process for easy understanding. It contains major equipments &
the flow pattern of the process.
But if we want to go in more detail then Piping & Instrumentation
Diagram (P&ID) helps us.
What is P&ID?
 It shows all equipments with their size & material of piping.
 It shows Vents, Drains, Blinds & Safety valves. Also indicate
the set pressure of safety valves.
 Shows type of Insulation.
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
Introduction
 Shows Critical Logics and Emergency Shutdown (ESD).
 Provides Nozzle size and number of Vessel and Tanks.
 Indicates all instruments with their tag ID.
 Differentiates Field mounted and Remote Instruments.
 Indicates valves positions like during normal operation valve
will be NO (normal open) or NC (normal close).
 Shows type of control signals like pneumatic, electric or
Software Logic.
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
Main Menu
Learning Objectives
Introduction
Piping & Instrumentation
Diagram (P&ID)
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID
P&ID is very important when learning about the particular area.
During commissioning of the area it is widely used to do certain
tasks like punch listing.
New trainee use it for line tracing in order to understand the
process. Also as a Operation personnel it is must to know where
each equipment or instrument is located.
It is important to read and understand the P&ID to obtain all the
required knowledge. To read P&ID the person should recognize
the symbols used in P&ID.
It is not easy to put all the information related to the particular
area in one page so instead of providing complete descriptions
symbols are used. These are standard symbols so everyone
who know about the symbols can read P&ID.
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
Sight Glass
In Vessel
Exchanger
In line
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
Flexible Hoses
Angle
Relief Valve
Rupture Disk
(Vacuum)
Pressure/Vacuum Valve
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
Heat Exchangers
Four Way Valve
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
NC
NO
Gate Valve
Ball Valve
Globe Valve
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
NC
NO
Needle Valve
Butterfly Valve
Plug Valve
Sampling Point
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SP
P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
10”HS-03A101-1G56A
Line Size ( in Inches)
Piping Specification
Type of Content
Numerical Identification for Line
Project Part Number
P & I diagram Letter Designation
Line Number Identification
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
P&ID Symbols
Line Size: It is Diameter of Pipe in Inches
Prefix Symbol: It shows Contents in Pipe
Project Number: It shows area wise Project number, say
DM, Boiler, Air
P & I D number: This is from title box.
Numerical Identification: This is serial number of
Pipeline in a specific drawing
Pipe Specifications: This tells Material & rating of pipeline
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
Flash Card
P&ID contains only major equipment.
True
False
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
Flash Card
Piping and Instrument Diagram shows ___________________.
only the equipments
only the Critical Logics
only the instruments
All of above
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P&ID
Piping &
Instrumentation
Diagram (P&ID)
Summary
 Main purpose of P&ID is to provide details to
process personnel about their unit.
 After this training, now you understand how
we can read & understand P&ID.
 By learning about P&ID & how to read, you can
learn your new area fast and effectively.
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P&ID