Piping and Instrumentation Diagrams
Upper case L on a line
Hydraulic Line
Open circle on a line
Internal System Link
Circle with a dot on the line
Mechanical link
A rotameter is an example of a(n) _____ sensing element.
flow
Revisions
shows revisions that were made, where, when, and who.
Additional Inforamtion
Contains a variety of extra information
Second letter C on instrument tag
Controller
Which of the following is represented in a P&ID?
Different types of signals within the process, the process flow, and the major components within the system as well as the interconnection between components. The physical location of devices is not represented, so is the spatial distance between devices, or the size of the devices, and not all components(only major components).
A backslash superposed on a dashed line OR a backslash supper posed on three slashes on a line
Electric Binary
Second letter E on instrument tag
Element(sensor)
Waves on a line
Guided Ultrasonic Waves
Second letter I on instrument tag
Indicator
What lists every document in the process by the tag number and the number of drawings on which it can be found?
Instrument Index
LG tag w/o bars
Level Gauge mounted on tank
LS
Level Switch
LT
Level Transmitter
LG tag w/ 2 bars
Level gauge externally connected
LI
Level indicator with two connections
Vendor Drawing Number
Lists any vendor drawings that relate to the instrument.
Installation Detail Drawing Number
Lists the installation drawing number and the drawing describes how to install the installation
When a P&ID shows a single loop within a process, it is called a(n) _____.
Loop Diagram
A(n) _____ is a diagram that shows the functional relationships in an entire process or section of a process.
P&ID(Piping and Instrumentation Diagram)
What documents typical process system consist?
P&IDs, installation drawings, and instrument specifications.
P&ID
Piping and Instrumentation Diagram. It shows the functional relationships in an entire process or a section of a process.
One back slash superposed onto two slash on a line
Pneumatic Binary (2 operating conditions)
Thin single line
Process connection
Thick single line
Process piping
Second letter R on instrument tag
Recorder
Location/Location Legend
Shows the representations of location letters.
Second letter S on instrument tag
Switch
_____ are hollow tubes in which the temperature element is placed to protect it from the process.
Thermowells
Specification sheet number
This is where the specification sheet number of the instrument is listed to detail the physical characteristics of the instrument.
Second letter T on instrument tag
Transmitter
Waves not on a line
Unguided Ultrasonic Waves
A line with a backslash through it represents a(n) _____ signal.
binary
A location legend is sometimes included at the _____ of an instrument index.
bottom
The basic valve symbol is often referred to as a(n) ____ because of its shape.
bowtie
X on a line
capillary tube
A connection line on a temperature element symbol that has a _____ around it indicates that the element is inside a thermowell.
circle
Service
describes the type of process where the instrument is installed and/or how the instrument functions in terms of measuring the process
On pressure elements, a _____ is used to separate the liquid from the air.
diaphragm
A dashed line or three slashes on a flow diagram represents a(n) _____ line.
electric
Diaphragm(Waves in tight box)
flexible disk with pressure applied to one side
A bubble with the identifiers LG inside it represents a (level) _____, either mounted on a the tank or externally connected.
gauge glass
The most basic valve actuator is the _____ actuator, which requires a person to manually operate the valve.
hand
A _____ is a document that lists every instrument in the process by tag number.
instrument index
Some _____ sensing element symbols indicate the method the devices use to transmit data to the control loop.
level
Notes
lists any additional information about the instrument
P&I Drawing number
lists piping and instrument
signoffs
lists several signoffs on the instrument index to ensure accuracy
drawing numbers
lists several types of drawings for an instrument
Electrical drawing number
lists the drawing number that shows the electrical connections of the instrument.
Piping Drawing number
lists the drawing number that shows the piping line where the instrument is installed
Location and Routing Drawing Number
lists the location of panel drawing number
Loop Sheet Drawing number
lists the loop drawing number
Tag Number/Area Prefix
lists the tag number and area number of every instrument
It is important to know the _____ of an instrument in case you need specifications on it or need to order a new one.
manufacturer
A line with two slashes through it represents a(n) _____ line on a flow diagram.
pneumatic
A(n) ____ is a device that controls the movement of an actuator.
positioner
The most common types of pumps are reciprocating, centrifugal, and _____ pumps.
rotary
The _____ data in an instrument index describes the type of process where the instrument is installed.
service
A(n) _____valve actuator is represented by a symbol that has a square with the letter S inside.
solenoid
The _____ number indicates on which document information about the physical characteristics of the instrument can be found.
specification sheet
Temperature and pressure elements are represented by a _____ symbol(circle) tag.
standard
If the temperature element connection line spreads out to form a T on the process piping, the temperature element is _____.
surface mounted
A square with an X in the center indicates a(n) ____ type flow sensor.
turbine
manufacturer
used to request specifications and order new parts
A square with an arrowhead pointing to the right indicates a(n) _____ flow sensor.
vortex
