ISO 14084-2:2015

INTERNATIONAL ISO
STANDARD 14084-2
First edition
2015-04-01
Process diagrams for power plants —
Part 2:
Graphical symbols
Schémas de procédés pour centrales électriques —
Partie 2: Symboles graphiques
Reference number
ISO 14084-2:2015(E)
©
ISO 2015

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ISO 14084-2:2015(E)

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© ISO 2015
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ISO 14084-2:2015(E)

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Graphical symbols . 1
4.1 General . 1
4.2 Size of graphical symbols . 1
4.3 Creation of new symbol examples . 2
4.4 Symbols for large/complex objects . 2
5 Structuring and representation . 2
5.1 Overall structure . 2
5.2 Registration numbers . 2
5.3 Representation of graphical symbols in the standard . 3
5.4 Legend to table representation . . 3
6 Connections and related devices . 4
6.1 Fluid connections . 4
6.1.1 Functional connections . 4
6.1.2 Connections with indication of process media . 4
6.1.3 Simplified representation . 5
6.1.4 Symbols for direction, branching, crossing, etc. 5
6.1.5 Pipeline joints, couplings, etc. 6
6.1.6 Accessories for connections . 6
6.1.7 Pipeline components . 7
6.1.8 Pipeline insulation, tracing, etc. . 8
6.2 Mechanical connections . 9
7 Fluid flow control . 9
7.1 Valves . 9
7.1.1 On-off valves . 9
7.1.2 Non-return valves .10
7.1.3 Control valves .11
7.1.4 Safety and relief valves .12
7.1.5 Special valves .13
7.1.6 Supplementary valve symbols .13
7.1.7 Specific valve features .14
7.2 Dampers .14
7.2.1 On-off dampers .14
7.2.2 Non-return dampers.15
7.2.3 Control dampers .15
7.2.4 Safety dampers .16
7.3 Safety devices other than valves .16
8 Actuators .16
8.1 Manual actuators . .16
8.2 Mechanical actuators .16
8.3 Automatic actuators .17
8.4 Supplementary symbols .17
9 Fluid transport .18
9.1 Pumps .18
9.2 Fans, ventilators, blowers, compressors, etc. .19
9.3 Vacuum pumps, etc. .20
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ISO 14084-2:2015(E)

10 Fluid energy transfer .21
10.1 Heat exchangers .21
10.2 Energy transfer by mixing .23
10.3 Cooling towers .23
11 Fluid processing .24
11.1 Separation .24
11.1.1 Separation, general .24
11.1.2 Separation of suspended substances in liquids .25
11.1.3 Separation of suspended substances in gasses .27
11.2 Processing of fluids by adsorption, catalysis, conversion, thermic, etc. .28
11.2.1 Liquids .28
11.2.2 Gasses .29
11.3 Mixing .30
11.3.1 General.30
11.3.2 Devices for mixing .30
12 Storage .31
12.1 Permanent storage .31
12.2 Storage devices, surface indications, etc. .32
12.3 Mobile storage devices .33
12.4 Energy storage, expansion devices .33
13 Material transport .34
13.1 Conveyors, elevators, unloaders, etc. .34
13.2 Material flow control .36
13.3 Feeders .37
13.4 Handling equipment .38
13.5 Mobile transport equipment .39
14 Material processing .40
14.1 Separation .40
14.2 Processing, size reduction .42
14.2.1 Size reduction .42
14.2.2 Coarse size reduction, crushers .42
14.2.3 Fine size reduction, mills .42
14.2.4 Biomass processing .43
14.3 Humidifieing .43
15 Thermal energy generators .44
15.1 Conventional energy generators.44
15.2 Boiler combustion / heating systems .45
15.3 Boiler devices .45
15.4 Non-conventional energy generators .46
15.5 Thermal energy consumers .47
16 Machines, engines .47
16.1 Steam turbines, steam engines .47
16.2 Combustion engines, gas turbines .47
16.3 Electrical engines, motors, generators, converters .48
17 Mechanical transmission, shafts, bearings, couplings, etc. .48
17.1 Shafts .48
17.2 Bearings .48
17.3 Gears .49
17.4 Couplings .49
17.5 Brakes .50
17.6 Transmissions devices.50
18 Instrumentation, measurement and control .50
18.1 Process control information (PCI) .50
18.2 Measurement devices, sensors, etc. .51
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ISO 14084-2:2015(E)

18.2.1 Sensors general, etc. .51
18.2.2 Temperature .51
18.2.3 Level .52
18.2.4 Weight .52
18.2.5 Flow . .52
18.2.6 Speed, vibrations, etc. .53
18.2.7 Length, position displacement, etc. .54
18.3 Signals .54
18.4 Miscellaneous .54
18.5 Control processing elements .55
Annex A (informative) Creation of new symbol examples .57
Annex B (informative) Examples of large and complex symbols .59
Bibliography .60
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ISO 14084-2:2015(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword — Supplementary information.
The committee responsible for this document is ISO/TC 10, Technical product documentation,
Subcommittee SC 10, Process plant documentation.
ISO 14084 consists of the following parts, under the general title Process diagrams for power plants:
— Part 1: Specification for diagrams
— Part 2: Graphical symbols
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ISO 14084-2:2015(E)

Introduction
General
This part of ISO 14084 deals with preparation of process diagrams for power plants.
ISO/TC 10/SC 10 prepares standards for diagrams including graphical symbols which together with
standards prepared by other ISO committees and IEC constitute the basis for preparation of diagrams
for process industry.
The interrelations between these standards are illustrated in Figure 1. Standards in bold are
ISO/TC 10/SC 10 standards
NOTE Standards marked * are collective application standards.
Figure 1 — Interrelations between ISO and IEC standards for diagrams for power plants
Collective application standard
ISO/TC 10/SC 10 standards:
— ISO 15519-series: Specifications for diagrams for process industry;
— ISO 14617-series: Graphical symbols for diagrams;
are basic standards, which are general and apply to all fields of applications. Technical committees
working in a specific application field are allowed to make extracts and publish them as collective
application standards of ISO 15519-series, ISO 14617-series or both.
Application fields
This International Standard applies to the power plant field, which include conventional fossil and
biomass fired power plants, hydro power plants, sea wave power plants, wind power plants, nuclear
power plants, geothermal power plants, solar power plants, osmosis power plants, incineration plants,
and industrial power plants.
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INTERNATIONAL STANDARD ISO 14084-2:2015(E)
Process diagrams for power plants —
Part 2:
Graphical symbols
1 Scope
This part of ISO 14084 specifies graphical symbols for process diagrams for power plants and guidelines
for creation of new graphical symbol examples.
This part of ISO 14084 is a collective application standard of the ISO 14617-series.
Graphical symbols for fluid power diagrams can be found in ISO 1219-1.
Graphical symbols for electrotechnical diagrams can be found in IEC 60617.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 10209, Technical product documentation — Vocabulary — Terms relating to technical drawings,
product definition and related documentation
ISO 14617 (all parts), Graphical symbols for diagrams
3 Terms and definitions
For the purposes of this document, the terms and definitions given in the ISO 15519-series and ISO 10209
and the following apply.
3.1
symbol example
graphical symbol created of basic and supplementary graphical symbols
4 Graphical symbols
4.1 General
Graphical symbols shall comply with ISO 14617-series.
General rules for graphical symbols are given in ISO 81714-1. Rules for CAx application of graphical
symbols are given in IEC 81714-2.
Specific rules and guidelines for graphical symbols for use in diagrams are given in ISO 15519-1.
4.2 Size of graphical symbols
Graphical symbols in this part of ISO 14084 are shown in a grid system with module M = 2,5 mm.
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ISO 14084-2:2015(E)

4.3 Creation of new symbol examples
This International Standard includes the most common used graphical symbols for diagrams for power
plants. In case a needed symbol cannot be found in this International Standard or in ISO 14617-series
then, the needed graphical symbol example should be created on basis of basic and supplementary
graphical symbols in ISO 14617 as illustrated in Annex A.
In case the needed graphical symbol neither exists in ISO 14617 nor can be created on basis of basic
and supplementary symbols in ISO 14617 then, a new graphical symbol shall be requested according to
ISO/IEC Directives, Part 1, Consolidated ISO Supplement, 2014, Annex SH.
4.4 Symbols for large/complex objects
Graphical symbols for large and complex objects like boilers, turbines, flue gas treatment plants, boiler
feed pumps, etc. a
...