ISO 14617-1:2005

INTERNATIONAL ISO
STANDARD 14617-1
Second edition
2005-07-15


Graphical symbols for diagrams —
Part 1:
General information and indexes
Symboles graphiques pour schémas —
Partie 1: Informations générales et index





Reference number
ISO 14617-1:2005(E)
©
ISO 2005

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ISO 14617-1:2005(E)
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ISO 14617-1:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Arrangement of ISO 14617.2
5 Registration numbers.3
6 Presentation of graphical symbols.4
7 Application rules and examples.5
8 Use of graphical symbols .5
9 Lettering.5
10 Indexes.6
Annex A (informative) Alphabetical index .7
Annex B (informative) Index of graphical symbol registration numbers .34
Annex C (informative) Cross-reference index .41
Bibliography .55

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ISO 14617-1:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 14617-1 was prepared by Technical Committee ISO/TC 10, Technical product documentation,
Subcommittee SC 10, Process plant documentation and tpd-symbols.
This second edition cancels and replaces the first edition (ISO 14617-1:2002), of which it constitutes a minor
revision.
ISO 14617 consists of the following parts, under the general title Graphical symbols for diagrams:
 Part 1: General information and indexes
 Part 2: Symbols having general application
 Part 3: Connections and related devices
 Part 4: Actuators and related devices
 Part 5: Measurement and control devices
 Part 6: Measurement and control functions
 Part 7: Basic mechanical components
 Part 8: Valves and dampers
 Part 9: Pumps, compressors and fans
 Part 10: Fluid power converters
 Part 11: Devices for heat transfer and heat engines
 Part 12: Devices for separating, purification and mixing
 Part 13: Devices for material processing
 Part 14: Devices for transport and handling of material
 Part 15: Installation diagrams and network maps
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ISO 14617-1:2005(E)
Introduction
The purpose of ISO 14617 in its final form is the creation of a library of harmonized graphical symbols for
diagrams used in technical applications. This work has been, and will be, performed in close cooperation
between ISO and IEC. The ultimate result is intended to be published as a standard common to ISO and IEC,
which their technical committees responsible for specific application fields can use in preparing International
Standards and manuals.

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INTERNATIONAL STANDARD ISO 14617-1:2005(E)

Graphical symbols for diagrams —
Part 1:
General information and indexes
1 Scope
This part of ISO 14617 serves as an introduction to all the other parts. In particular, it gives information on the
creation and use of registration numbers for identifying graphical symbols used in diagrams, rules for the
presentation and application of these symbols, and examples of their use and application. It includes three
indexes: an alphabetical index and an index of registration numbers — both concerned uniquely with
ISO 14617 — and an index of cross-references to related items found in other International Standards.
For the fundamental rules of creation and application of graphical symbols in diagrams, see ISO 81714-1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 81714-1:1999, Design of graphical symbols for use in the technical documentation of products — Part 1:
Basic rules
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE The list has been restricted to terms whose meaning is not obvious and which have not been defined
elsewhere in an International Standard, or which have been defined in various ways in different standards. In preparing
these definitions, ISO and IEC standards on terminology have been consulted; see the references in parentheses.
However, most of the definitions in those standards were prepared by different technical committees within a restricted
scope. This means that many terms so defined have to be given more general or neutral definitions when applied in the
context of graphical symbols.
3.1
function
activity proper to anything, mode of action by which it fulfils its purpose
EXAMPLE To measure, to control, to indicate.
3.2
product
thing produced by natural process or manufacture; result
EXAMPLE An element, a component or a device.
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ISO 14617-1:2005(E)
3.3
component
constituent part of equipment that cannot be physically divided into smaller parts without losing its character
[IEC 60050-131]
3.4
device
assembly of components to perform a required function
EXAMPLE An actuating device, a centrifuge.
[IEC 60050-151]
3.5
element
part of a component
EXAMPLE A filter element in a filter, a contact in an electromechanical relay.
3.6
graphical symbol
visually perceptible figure used to transmit information independently of language
[ISO 81714-1]
3.7
terminal line
line of a graphical symbol ending at a connect node
NOTE A connect node is a location on a graphical symbol intended for connection (ISO 81714-1).
[ISO 81714-1]
3.8
connecting line
graphical symbol representing a functional connection, a mechanical link, a pipeline, a duct, or an electric
connection
[IEC 61082-1]
4 Arrangement of ISO 14617
4.1 Domains of application
The complete ISO 14617 is to consist of a number of other parts in addition to those listed in the Foreword.
Among the parts under preparation are ISO 14617-13, concerned with graphical symbols for material
processing, and ISO 14617-14, concerned with the symbols representing devices for transport and handling of
material.
This part of ISO 14617 is an introduction to all the other parts. ISO 14617-2 to ISO 14617-6 cover graphical
symbols for use in most technical fields. ISO 14617-7 to ISO 14617-12 cover those for use in all fields except
the electrotechnical. ISO 14617-15 comprises graphical symbols for use in installation diagrams and on
network maps for pipelines, ducts and electric connections.
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ISO 14617-1:2005(E)
4.2 Subdivision of parts
Each part of ISO 14617 is divided into clauses that each deal with graphical symbols for a particular group of
generic products or functions. When appropriate, clauses are given subclauses, as follows using the example
of Clause 7 from ISO 14617-2:
Clause 7 Directions
Subclause 7.1 Symbols of basic nature
Subclause 7.2 Application rules for the symbols in 7.1
Subclause 7.3 Symbols giving supplementary information
Subclause 7.4 Application rules for the symbols in 7.3
Subclause 7.5 Application examples
Where certain subclauses are further subdivided, this has been done along the following lines. Take, for
example, 4.3 in ISO 14617-2:
Subclause 4.3 Symbols giving supplementary information
Subclause 4.3.1 Input and output labels
Subclause 4.3.2 General functions
Subclause 4.3.3 Mathematical operations
Subclause 4.3.4 Change of discrete state at specified values of a characteristic quantity
Subclause 4.3.5 Logic negation, logic inversion, inputs and outputs for auxiliary power supply
When a cross-reference is made to a particular graphical symbol or application rule or application example, its
location is given within parentheses after the registration number of the symbol, rule or example.
EXAMPLE 1 “See R101 (4.2.1)” directs the reader to application rule R101, located in subclause 4.2.1.
When cross-referencing to another part, the part number is also included.
EXAMPLE 2 A cross-reference to symbol 142 in ISO 14617-2 is given as “See 142 (2-4.3.2.28)”.
5 Registration numbers
IMPORTANT — A direct relationship does not necessarily exist between graphical symbols,
application rules and application examples using registration numbers that share the same numerals.
For example, while graphical symbol 101 correlates to both application rule R101 and application
example X101, it correlates as well to application examples X102 to X114; whereas symbol 114, to take
just one other example, is unrelated to R114 and X114.
5.1 Graphical symbol
Each graphical symbol is assigned a unique registration number. In principle, this number is arbitrarily chosen.
No information can be derived from it. The registration number will remain unchanged throughout the lifetime
of the corresponding graphical symbol, including in future revisions of this publication. If a graphical symbol is
changed in the future, the registration number shall be supplemented with one or more characters. If the
graphical symbol is substantially changed, it shall instead be given a new registration number.
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ISO 14617-1:2005(E)
5.2 Application rule
Each application rule has a registration number in the same way as the graphical symbols, except that the
registration number starts with the letter R (e.g. R101).
5.3 Application example
Each application example has a registration number in the same way as the graphical symbols, except that
the registration number starts with the letter X (e.g. X101).
6 Presentation of graphical symbols
6.1 General
ISO 14617 establishes graphical symbols to be used in diagrams such as overview diagrams, flow diagrams
and circuit diagrams.
6.2 Graphical symbols of same shape but different meaning
Graphical symbols having the same shape but different meanings have different registration numbers. This
implies that it is possible to distinguish between same-shape graphical symbols in a CAD (computer-aided
design) system, provided that each symbol has been recalled from a CAD library using the appropriate
registration number.
For a person reading a diagram, the intended meaning can normally be recognized by the context of the
diagram. When this is not possible, graphical symbols having the same shape shall be provided with
supplementary information. For examples, see the symbols for connections in ISO 14617-3 and the rules for
adding symbols giving supplementary information such as application rule R402 in the same part.
6.3 Different forms of graphical symbols
In some cases, different forms of a graphical symbol can occur. These different forms are given separate
registration numbers. The primary reason for having two or more forms for the same symbolization is that they
convey differing amounts of information.
Symbols having different forms and differing amounts of information (e.g. those for use in overview diagrams
and those for use in circuit diagrams) are marked Form 1, Form 2, etc. This marking is also used in some
cases where the different forms contain the same amount of information, but where more than one form is
justified because of different application methods in the rules for preparing diagrams.
6.4 Dimensions of graphical symbols
The graphical symbols in ISO 14617 have been designed in accordance with the rules given in ISO 81714-1.
The module size M = 2,5 mm has been used. For small graphical symbols, the symbol is shown double its
normal size, applying the same module and the same line width. Such symbols are marked “200 %”.
For the auxiliary grid system defined in ISO 81714-1, the module 0,25 M has been used.
6.5 Descriptions
In those cases where ISO and IEC have the same term for different items, the term has been provided with
ISO IEC
ISO and IEC superscripts, for example, line and line .
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ISO 14617-1:2005(E)
7 Application rules and examples
The application rules give information on how to design composite symbols and how to apply the graphical
symbols in a diagram. The application examples are to be regarded as guidelines.
In order to facilitate their use, the application examples are accompanied by information on which graphical
symbols have been used to compose the examples shown.
EXAMPLE “101, 123” in 2-4.5.8 signifies that the example X108 is built up from graphical symbols 101 and 123.
8 Use of graphical symbols
8.1 Choice of graphical symbols
Rules for the choice of graphical symbols are given in the standards for the preparation of diagrams.
8.2 Dimensions of graphical symbols
Symbols may be increased in size, for example, in order to allow all terminals to be represented. They may
also be reduced in size. In both cases, the original line width shall be maintained.
Further rules for the use of graphical symbol sizes and line widths are given in the standards dealing with the
preparation of diagrams.
8.3 Auxiliary lines
In some cases, the symbol has been shown together with auxiliary lines in order to indicate its correct location
in relation to other symbols or the recommended location of connecting lines. Such auxiliary lines are not part
of the symbol and are shown dotted (very short dashes).
EXAMPLE 1 Symbol 181 — logic negation — shown at an outline of a symbol indicated by a dotted rectangle.

EXAMPLE 2 An auxiliary line indicating the correct location of the symbol for a connection to a two-way valve,
symbol 2101.

8.4 Variants of graphical symbols
The rules for diagram layout give the possibility of arranging circuits horizontally or vertically, and of arranging
circuits for feedback and similar signals in a direction opposite to the normal one. For that purpose, different
variants of the graphical symbols exist. The rules for the creation of the different variants are given in
ISO 81714-1.
9 Lettering
For lettering, see ISO 81714-1.
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ISO 14617-1:2005(E)
10 Indexes
The alphabetic index given in Annex A can be used to find a graphical symbol for a certain component, device
or function wherever the meaning (description) is known. This index also covers the application examples.
The registration number index given in Annex B can be used to locate a graphical symbol whose registration
number is already known.
The cross-reference index given in Annex C is intended as a link between the registration numbers and the
corresponding descriptions in other, existing ISO and IEC standards.

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ISO 14617-1:2005(E)
Annex A
(informative)

Alphabetical index
This alphabetical index can be used to find a graphical symbol for a certain component, device, or function if
its meaning (description) is already known. The index also covers the application examples.
Regis- Location Regis- Location
Description tration (Part- Description tration (Part-
number subclause) number subclause)

Above ground hydrant . 3122 15-7.2 – Manual ~ in the form of removable
Access chamber handle.686 4-5.1.6
– Manual ~ in the form of treadle.690 4-5.1.10
– Circular-shaped ~, inspection well. 3087 15-5.1.7
Acoustic signalling device . 866 5-10.1.4 – Manual ~ operated by pulling .683 4-5.1.3
– Manual ~ operated by pushing.682 4-5.1.2
Active area
– Double-acting hydraulic actuator – Manual ~ operated by pushing and
with different ∼s.721 4-6.1.11 pulling.684 4-5.1.4
– Manual ~ operated by turning.685 4-5.1.5
– Double-acting pneumatic actuator
with different ~s. 722 4-6.1.12 – Manual ~ with special shape for safety
Actuating device. 741 4-7.1.1 purpose.691 4-5.1.11
– operating when actual temperature
– of double-acting diaphragm actuator
is less than set value .X717 4-6.5.5
type.X743 4-7.5.3
– of electric motor type . X2131 8-4.5.4.1 – Single-acting diaphragm ~.725 4-6.1.15
 X2136 8-4.5.4.6
– of pneumatic motor type . X742 4-7.5.2
– of single-acting fluid cylinder type. X741 4-7.5.1  X2138 8-4.5.4.8
 X2152 8-5.5.2
– operated by pneumatic power stored
inside actuator . X747 4-7.5.7 – Single-acting hydraulic ~ .717 4-6.1.7
– operating with touch effect. X744 4-7.5.4 – Single-acting pneumatic ~.718 4-6.1.8
– Spring-operated ~ with manual spring Actuators
charging.X745 4-7.5.5 – Automatic ~.– 4-6
– Spring-operated ~ with spring charging
See also Hydraulic actuators, Pneumatic
by electric motor . X746 4-7.5.6
actuators, Manually operated actuators
– Spring-loaded ~.X2005 7-4.5.5 Additional simplifications.– 3-9
Actuating devices. – 4-7
Adjustability.201 2-5.1.1
Actuator  8-4.3.1.3
– Cam-operated ~.714 4-6.1.4
  8-5.3.3
– Device for restricted access to ~. 692 4-5.1.12  9-4.3.1
– Double-acting diaphragm ~ . 726 4-6.1.16
  10-4.3.1
– Double-acting ~ of fluid cylinder type. X2107 8-4.5.1.7  10-5.3.1
– Double-acting hydraulic ~. 719 4-6.1.9
  14-4.3.1
– Double-acting, hydraulic ~ with – Non-linear ~.202 2-5.1.2
different active areas . 721 4-6.1.11
– Pre-set ~.203 2-5.1.3
– Double-acting, pneumatic ~. 720 4-6.1.10
  8-4.3.1.4
– Double-acting pneumatic ~ with
  8-5.3.4
different active areas . 722 4-6.1.12
  10-4.3.2
– Flow-target-operated ~.716 4-6.1.6
– Resistor with continuous ~.X203 2-5.5.3
  7-4.1.5
– Resistor with electric-motor-operated ~.X205 2-5.5.5
– Fluid-level-operated ~.715 4-6.1.5
– Resistor with manual ~ .X204 2-5.5.4
  7-4.1.4
– Resistor with pre-set ~.X201 2-5.5.1
– in the form of a double-acting fluid
– Resistor with ~ in five steps.X202 2-5.5.2
cylinder.724 4-6.1.14
See also Variability
 X713 4-6.5.3
Adjustable capacity
 X2107 8-4.5.1.7
– Hydraulic pump with ~ .X2401 10-4.5.1
– in the form of a hydraulic motor with
 X2402 10-4.5.2
alternative directions of flow . 2407 4-6.1.17
– Liquid pump with ~.X2301 9-4.5.1
– in the form of a pneumatic motor . X712 4-6.5.2
 X2302 9-4.5.2
– in the form of a pneumatic motor with
– Over-centre hydraulic pump with ~.X2407 10-4.5.7
alternative directions of flow . 2408 4-6.1.18
Adjustable gain
– in the form of a single-acting fluid
– Amplifier with ~ .X207 2-5.5.7
cylinder.723 4-6.1.13
Adjustable hydraulic rotary torque
– Manual ~.681 4-5.1.1
converter.X2431 10-5.5.1
– Manual ~ in the form of key . 687 4-5.1.7
Adjustable restrictor (valve) .X2211 8-6.5.3.1
– Manual ~ in the form of lever . 688 4-5.1.8
 X2212 8-6.5.3.2
– Manual ~ in the form of pedal . 689 4-5.1.9
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ISO 14617-1:2005(E)
Regis- Location Regis- Location
Description tration (Part- Description tration (Part-
number subclause) number subclause)

– with adjustable flow in one direction – with the gain compensated for
and restricted flow in the other .X2213 8-6.5.3.3 frequency variations .X110 2-4.5.10
Adjustable speed Amplifying equipment
– Hydraulic motor with ~.X2415 10-4.5.15 – Enclosure with ~.X3081 15-5.5.1
– Hydraulic pump driven by shaft with ~.X2404 10-4.5.4 Analogue signal .234 2-6.1.14
– Liquid pump driven by shaft with ~.X2303 9-4.5.3  6-4.3.5
Adsorption pump.2335 9-5.1.5 Analogue signal processing
 2336 9-5.1.6 – Devices for ~ .– 5-12
Affected area .2177 8-6.3.7 Anchor point.3004 15-4.1.4
Agglomeration AND-elements
– Size enlarging by sintering,~ – Component consisting of two
coagulation, or flocculation.2809 13-4.3.9 identical ~ .X346 2-11.5.3
Air conditioner.X3152 15-9.5.2  X347 2-11.5.4
– for pneumatic systems.2691 12-7.1.1 AND-function (Logic ~) .142 2-4.3.2.28
Air conditioning .3151 15-9.3.2  6-7.3.3.12
Air fin cooler with induced draft.X2505 11-4.5.5 Angle
Air lubricator.X2674 12-6.5.4 – Measuring transducer for ~ .X769 5-4.5.19
Alarm.3066 15-4.3.16 Angled globe type spring-loaded vacuum
valve operating when pressure is
– High pressure ~.X1062 6-7.5.22
lower than set value .X2125 8-4.5.3.5
– Indicating and transmitting of level,
registering, and ~.X1065 6-7.5.25 Angled two-way valve.2102 8-4.1.2
Annealing
– Light ~.3067 15-4.3.17
Air conditioner for pneumatic systems.2691 12-7.1.1 – Heat treatment, for example, ~ or
tempering.2807 13-4.3.7
Air fin cooler with induced draft.X2505 11-4.5.5
Anti-clockwise rotation.X250 2-7.5.5
Air lubricator.X2674 12-6.5.4
 X251 2-7.5.6
Alarm
 X2416 10-4.5.16
– High pressure ~.X1062 6-7.5.22
 X2417 10-4.5.17
– Indicating and transmitting of level,
 X2419 10-4.5.19
registering, and ~.X1065 6-7.5.25
Alarming.1051 6-7.3.1.1  X2422 10-4.5.22
 X2423 10-4.5.23
All-or-nothing relay
– Electromechanical ~ with some Anti-siphon trap.2038 7-5.1.12
contacts delayed.X653 4-4.5.3  15-10.3.5
– Electromechanical ~, the whole relay Approximately constant force, motion, or
delayed when coil is energized.X654 4-4.5.4 flow.223 2-6.1.3
Alternative directions Area
– Direction of propagation, energy, or – Affected ~.2177 8-6.3.7
signal flow, ~ (half-duplex).250 2-7.1.8 Areas
  6-4.3.3
– Double-acting hydraulic actuator
– Gas pump, compressor, fan with ~ of with different active ~.721 4-6.1.11
flow.2304 9-4.1.4 – Double-acting pneumatic actuator
– Hydraulic pump/motor with ~ of flow .2413 10-4.1.13 with different active ~.
...