Process and Instrumentation Drawing Symbols and Their Usage
Process and Instrumentation Diagrams use special shapes to represent different types of equipments, valves, instruments and pipelines.
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A process and
instrumentation drawing is more complex than process flow diagram. Edraw includes more than 500 vector P&ID
symbols used to depict mechanical equipment, piping, piping components,
valves, equipment drivers and instrumentation and controls.
Process and Instrumentation Symbols - Equipment
Pumps and tanks come in a variety of designs and shapes. Learn the basic knowlegde about piping and instrumentation diagram.
Pump is a mechanical device using suction or
pressure to raise or move liquids, compress gases, or force air into inflatable
objects such as tires. The symbols for pumps may closely resemble those for
Centrifugal pump is rotodynamic pump that uses a
revolving impeller to add to the force and pressure of fluids.
Gear pump provides continuous, non-pulsing flow
making it ideal in chemical installations.
Sump pump is widely used to remove accumulated water
from a sump pit or other location.
Vacuum pump is applied to improve the efficiency of
steam heating systems in many ways. The most important consideration is the
rapid and efficient removal.
Screw pump is the Archimedes screw pump that is
still used in irrigation and agricultural applications.
Tank is for storing process fluids of various
types, under different process conditions.
Onion tank refers to an open top collapsible bladder
designed for use as a mobile storage solution when recovering contaminants.
Compressor is a mechanical device that takes in a
medium and compresses it to a smaller volume. A mechanical or electrical drive
is typically connected to a pump that is used to compress the medium.
Axial compressor is widely used in gas turbines,
such as jet engines, high speed ship engines and small scale power stations.
Reciprocation compressor is typically used where
high compression ratios are required per stage without high flow rates, and the
process fluid is relatively dry.
Rotary compressor is a type of gas compressor which
uses a rotary type positive displacement mechanism.
Mixing is a device that combine or put
some materials together to form one substance or mass.
Mixing vessel is a container that is used to blend
several components together.
Heat exchanger is a device used to transfer heat
energy between two process flows. Heat exchangers transfer heat energy through
conductive and convective heat transfer.
Cooling towers transfer heat energy to the outside
air through the principle of evaporation.
Cooler is a device, container or room that cools air
through the evaporation of water or keeps air cool.
Turbine driver is used to drive pumps and fans at
Furnace is a device for heating a continuous current
of air by means of a fire contained within the apparatus and without mingling
the fresh air with the products of combustion.
Boiler is a closed vessel in which water or other
fluid is heated.
Oil burner is engineered from the ground up
exclusively to burn waste oils.
Automatic stoker is applied to supply hot water to
central heating systems.
Plate tower is used extensively in many processes and
Packed tower is a type of packed bed used to perform
Elevator is used to control the position of the nose
of the aircraft and the angle of attack of the wing.
Mixing reactor is widely used in the chemical
industry to promote mixing.
Process and Instrumentation Symbols - Valves
Gate valve is a device used to control the flow of
liquids and gases.
Check valve, also known as one-way valve, is to
prevent the line of medium back.
Globe valve is a mechanism used to control or stop
the flow of liquid or gas through a pipe.
Ball valve is a valve with a spherical disc, the
part of the valve which controls the flow through it.
Butterfly valve is installed between two flanges
using a separate set of bolts for each flange.
Angle valve is oriented at an angle of 90 deg of gate
Process and Instrumentation Symbols - Piping Lines
Process flow diagrams use special piping lines to represent
how signals are transmitted between equipments. These symbols are used to
identify how the instruments in the process connect to each other. And what type
of signal is being used. (electrical, pneumatic, data, etc)
All lines to be fine in relation to process piping lines.
Major pipeline is used to connect the equipment in
Major straight line is sued to connect the equipment
in the same horizontal or vertical position.
Process connection help to create the process flow
between equipments. Double click process connection to edit description.
Process and Instrumentation Symbols - Instruments
Process Flow Diagram use symbols and circles to represent
each instrument and how they are inter-connected in the process.
These instrumentation symbols can easily change in types by
clicking the quick action button while designing.
With large pre-drawn examples and more than 5000 symbols, drawing couldn't be easier!
Process Flow Diagram Symbols
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