Piping and Instrumentation Diagrams

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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


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