SIST EN ISO 16972:2020

SLOVENSKI STANDARD
SIST EN ISO 16972:2020
01-junij-2020
Nadomešča:
SIST EN 132:1999
Oprema za varovanje dihal - Slovar in grafični simboli (ISO 16972:2020)
Respiratory protective devices - Vocabulary and graphical symbols (ISO 16972:2020)
Atemschutzgeräte - Begriffe und graphische Symbole (ISO 16972:2020)
Appareils de protection respiratoire - Vocabulaire et symboles graphiques (ISO
16972:2020)
Ta slovenski standard je istoveten z: EN ISO 16972:2020
ICS:
01.040.13 Okolje. Varovanje zdravja. Environment. Health
Varnost (Slovarji) protection. Safety
(Vocabularies)
13.340.30 Varovalne dihalne naprave Respiratory protective
devices
SIST EN ISO 16972:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16972:2020

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SIST EN ISO 16972:2020


EN ISO 16972
EUROPEAN STANDARD

NORME EUROPÉENNE

March 2020
EUROPÄISCHE NORM
ICS 01.040.13; 13.340.30
English Version

Respiratory protective devices - Vocabulary and graphical
symbols(ISO 16972:2020)
Appareils de protection respiratoire - Vocabulaire et Atemschutzgeräte - Begriffe und graphische Symbole
symboles graphiques (ISO 16972:2020) (ISO 16972:2020)
This European Standard was approved by CEN on 23 February 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16972:2020 E
worldwide for CEN national Members.

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SIST EN ISO 16972:2020
EN ISO 16972:2020 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 16972:2020
EN ISO 16972:2020 (E)
European foreword
This document (EN ISO 16972:2020) has been prepared by Technical Committee ISO/TC 94 "Personal
safety -- Personal protective equipment" in collaboration with Technical Committee CEN/TC 79
“Respiratory protective devices” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2020, and conflicting national standards
shall be withdrawn at the latest by September 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 132:1998.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 16972:2020 has been approved by CEN as EN ISO 16972:2020 without any modification.

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SIST EN ISO 16972:2020

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SIST EN ISO 16972:2020
INTERNATIONAL ISO
STANDARD 16972
Second edition
2020-03
Respiratory protective devices —
Vocabulary and graphical symbols
Appareils de protection respiratoire — Vocabulaire et symboles
graphiques
Reference number
ISO 16972:2020(E)
©
ISO 2020

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SIST EN ISO 16972:2020
ISO 16972:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

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SIST EN ISO 16972:2020
ISO 16972:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms related to respiratory protective devices . 1
4 Terms related to human factors .25
5 Graphical symbols for use on respiratory protective devices .31
Bibliography .32
Index .33
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SIST EN ISO 16972:2020
ISO 16972:2020(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 94, Personal safety — Personal protective
equipment, Subcommittee SC 15, Respiratory protective devices, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 79, Respiratory protective devices,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 16972:2010), which has been technically
revised. The main changes compared with the previous edition are as follows:
— the terms used in the field of respiratory protective devices (RPD) have been updated;
— Clause 5, “Units of measurement”, has been deleted;
— Annex A, “Terms and definitions referring to respiratory protective devices in current national
standards, regulations or other national contexts”, has been deleted;
— Annex B, “Abbreviations used”, has been deleted.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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SIST EN ISO 16972:2020
INTERNATIONAL STANDARD ISO 16972:2020(E)
Respiratory protective devices — Vocabulary and
graphical symbols
1 Scope
This document defines terms and specifies units of measurement for respiratory protective devices
(RPDs), excluding diving apparatus. It indicates graphical symbols that can be required on RPDs, parts
of RPD or instruction manuals in order to instruct the person(s) using the RPD as to its operation.
NOTE Terms and definitions for diving apparatus are given in EN 250.
2 Normative references
There are no normative references in this document.
3 Terms related to respiratory protective devices
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
abrasive blasting respiratory protective device
breathing apparatus (3.32) incorporating a protective hood (3.115) or a blouse (3.23) fitted with an
impact resistant (3.119) visor (3.252)
Note 1 to entry: Breathable air (3.28) is supplied to the wearer (3.257) from a source of air not carried by the wearer.
3.2
accessory
item, or items, that are attached to the respiratory protective device (RPD) (3.203) that are not necessary
for the RPD to meet the requirements of the RPD performance standard and do not compromise its
protection
3.3
adequacy assessment
selection method identifying the respiratory protective device (3.203) is able to reduce the wearer's
(3.257) inhalation exposure to acceptable levels
3.4
adequate respiratory protective device
adequate RPD
RPD (3.203) capable of reducing the inhalation exposure to an acceptable level
3.5
aerodynamic diameter
diameter of a unit density sphere having the same settling velocity as the particle (3.170) in question
3.6
aerosol
suspension of solid, liquid, or solid and liquid particles (3.170) in a gaseous medium, having a negligible
falling velocity (generally considered to be less than 0,25 m/s)
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3.7
aerosol penetration
ability of particles (3.170) to pass through a particle-filtering material
3.8
air flow resistance
pressure difference between upstream and downstream locations caused by the flow of air through
the parts and components of a respiratory protective device (3.203) such as an exhalation valve (3.79),
inhalation valve (3.120), filter(s) (3.86), and tube (3.245), etc.
3.9
air supply hose
fresh air supply hose
hose (3.116) for the supply of air at about atmospheric pressure
3.10
ambient air bypass
means to enable the wearer (3.257) to breathe the ambient atmosphere (3.12) before entering and after
leaving a hazardous atmosphere (3.108)
3.11
ambient air system
device used to deliver ambient air at a low pressure (3.134) directly to a breathable gas (3.29) respiratory
protective device (3.203) (manually or power assisted)
3.12
ambient atmosphere
air surrounding the wearer (3.257)
3.13
ambient concentration
concentration of a compound in the air surrounding the wearer (3.257)
3.14
ambient laboratory conditions
atmosphere where the temperature is between 16 °C and 32 °C and the relative humidity is between
20 % and 80 %
3.15
apertometer
extended hemispherical dome for measuring the angular area of the field of vision (3.85) [peripheral
isopter (3.176)] of a respiratory protective device (3.203) when mounted on a respiratory protective
device headform (3.204)
3.16
as received
not preconditioned or modified to carry out a test
3.17
assigned protection factor
APF
anticipated level of respiratory protection that would be provided by a properly functioning respiratory
protective device (RPD) (3.203) or class of RPD within an effective RPD programme (3.207)
3.18
assisted filtering respiratory protective device
assisted filtering RPD
filtering RPD (3.90) where breathable gas (3.29) is actively supplied to the wearer (3.257) by the
RPD (3.203)
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ISO 16972:2020(E)

3.19
averaged interactive flow rate
interactive flow rate (3.126) averaged over 10 consecutive breathing cycles (3.34) of the breathing
machine (3.38)
3.20
averaged maximum interactive flow rate
average of the highest flow rate (3.92) within each breathing cycle (3.34) of 10 consecutive breathing
cycles of the breathing machine (3.38)
3.21
averaged minimum interactive flow rate
average of the lowest flow rate (3.92) within each breathing cycle (3.34) of 10 consecutive breathing
cycles of the breathing machine (3.38)
3.22
averaged peak interactive flow rate
average of the maximum peak flow rate (3.92) within each breathing cycle (3.34) of 10 consecutive
breathing cycles of the breathing machine (3.38)
3.23
blouse
garment, used as a facepiece (3.83), that covers the head and upper part of the body to the waist and
wrists and to which air is supplied
3.24
body harness
means to enable certain components of a respiratory protective device (3.203) to be worn on the body
3.25
body temperature pressure saturated
BTPS
standard condition for the expression of ventilation (4.20) parameters
Note 1 to entry: Body temperature (37 °C), atmospheric pressure 101,3 kPa and water vapour pressure (6,27 kPa)
in saturated air.
3.26
breakthrough concentration
concentration of test gas (3.97) in effluent air at which a gas filter (3.98) undergoing a gas capacity
(3.44) test is deemed exhausted
3.27
breakthrough time
t
br
time taken from the start of the test until the test gas (3.97) and specified reaction products are
detected at the specified breakthrough concentration (3.26) at the downstream side of the filter (3.86)
under test
3.28
breathable air
air of a quality that makes it suitable for safe respiration
Note 1 to entry: For compressed air for breathing apparatus (3.32), see EN 12021:2014.
3.29
breathable gas
mixture of gases (3.97) that is suitable for respiration without adverse effects to health
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3.30
breathable gas cylinder
integral part of the respiratory protective device (3.203) that contains the breathable gas (3.29) supply
3.31
breathable gas quality
composition of a breathable gas (3.29) as defined in relevant standards
3.32
breathing apparatus
device that enables the wearer (3.257) to breathe independently of the ambient atmosphere (3.12)
3.33
breathing bag
component of a respiratory protective device (3.203) that compensates for variations in the breathable
gas (3.29) supply or demand and provides for peak inhalation flow requirements
3.34
breathing cycle
respiratory period comprising an inhalation and an exhalation phase
3.35
breathing frequency
number of breathing cycles (3.34) taken in a minute
Note 1 to entry: It is expressed in breaths per minute.
3.36
breathing gas regeneration
process whereby a respiratory protective device (3.203) absorbs carbon dioxide from exhaled gas (3.97),
delivers oxygen, and controls the water vapour and temperature of gas to be rebreathed
3.37
breathing hose
flexible hose (3.116) connected to the facepiece (3.83) through which breathable gas
(3.29) enters at atmospheric pressure or at a pressure slightly above or below
3.38
breathing machine
ventilation machine that simulates respiratory ventilation (4.20) using waveforms, which can be
sinusoidal or representative of the breathing cycle (3.34)
Note 1 to entry: See also metabolic simulator (3.149).
3.39
breathing machine assembly
breathing machine (3.38) plus all the connecting tubes (3.245), control valves and other necessary
hardware leading to the trachea tube assembly (3.244)
3.40
breathing peak resistance
maximum differential pressure of a respiratory protective device (3.203) during inhalation (inhalation
peak resistance) or exhalation (exhalation peak resistance)
3.41
breathing resistance
pressure differential between the upstream and downstream location caused by a respiratory
protective device (3.203) to the flow of breathable gas (3.29) during inhalation (inhalation resistance) or
exhalation (exhalation resistance)
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3.42
breath-responsive
actively or passively responsive following the wearer's (3.257) demand for air
3.43
bypass valve
component part of a respiratory protective device (3.203) that is furnished as an emergency manual
valve to supply necessary breathable gas (3.29) when the ordinary supply path is out of order
3.44
capacity
volume of available breathable gas (3.29) of a respiratory protective device (3.203)
3.45
carbon dioxide concentration limits
CO concentration limits
2
maximum allowed concentration of carbon dioxide within inhaled breathable gas (3.121)
3.46
char length
length of brittle residue found when a fabric or material is exposed to thermal energy
3.47
checking device
means to enable the wearer (3.257) to verify, before use or periodically during use, that the
manufacturer’s minimum design conditions (3.137) are met
3.48
class Sxxxx respiratory protective device
class Sxxxx RPD
supplied breathable gas RPD (3.236), where Sxxxx equals the amount of breathable gas (3.29) available
for respiration in litres
3.49
cleaning/disinfection resistance
ability of the device to withstand the cleaning and disinfection processes defined by the manufacturer
3.50
combined filter
filter (3.86) intended to remove dispersed solid and/or liquid particles (3.170) and specified gases (3.97)
and vapours (3.251) from the flow of air passing through it
3.51
combined respiratory protective device
combined RPD
RPD (3.203) that is capable of operating in either a filtering or breathable gas (3.29) supply mode
3.52
compatibility
ability of a respiratory protective device (3.203) to be used in conjunction with another item of personal
protective equipment (PPE)
3.53
competent fit-test operator
person with suitable and sufficient experience and with practical and theoretical knowledge of fit-test
methods who conducts the fit-testing procedures
3.54
competent person
person with suitable and sufficient experience and with practical and theoretical knowledge of the
elements of a respiratory protective device programme (3.207) for which (s)he is responsible
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3.55
compressed air filter
filter (3.86) intended to remove dispersed solid and/or liquid particles (3.170) and specified gases (3.97)
and vapours (3.251) from compressed air passing through it
3.56
compressed air line breathing apparatus
device that is not self-contained and in which the facepiece (3.83) is supplied with breathable air (3.28)
from a source of compressed air
3.57
compressed air supply tube
tube (3.245) that delivers breathable air (3.28) at a maximum pressure of 10 bar from a source of
compressed air
3.58
confined space
area with limited access, as described in national regulations, which requires special considerations
for entry
3.59
contaminant
undesirable solid, liquid or gaseous substance in the air
3.60
continuous control flow valve
control valve that provides the wearer (3.257) of a supplied breathable gas respiratory protective device
(3.236) with breathable gas (3.29) and allows the wearer to regulate a continuous air flow within
prescribed limits
3.61
count median diameter
CMD
particle size of a particle distribution for which one-half the total number of particles (3.170) are larger
and one-half are smaller
3.62
dead space
space in which exhaled gas (3.97) has not been purged and is subject to being rebreathed
3.63
dead space
conducting regions of the pulmonary airways that do not contain alveoli (4.7) and,
therefore, where no gas (3.97) exchange occurs
Note 1 to entry: These areas include the nose, mouth, trachea, large bronchia and the lower branching airways.
This volume is typically 150 ml in a male of average size.
3.64
dead space
sum of all anatomical dead space (3.63) as well as under-perfused (reduced blood flow)
alveoli (4.7) that are not participating in gas (3.97) exchange
Note 1 to entry: The volume of the physiological dead space can vary with the degree of ventilation (4.20). Thus,
the physiological dead space is the fraction of the tidal volume (3.240) that does not participate in gas exchange
in the lungs.
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3.65
demand type with positive pressure
type of respiratory protective device (3.203) that is fitted with a demand valve (3.67), is governed by
the breathing action of the lungs, and that actuates at a positive pressure (3.179) in the facepiece (3.83)
under conditions defined in relevant standards
3.66
demand type without positive pressure
type of respiratory protective device (3.203) that is fitted with a demand valve (3.67), is governed by the
breathing action of the lungs, and that actuates at a negative pressure (3.161) during inhalation in the
facepiece (3.83)
3.67
demand valve
valve that is governed by the breathing action of lungs and that supplies breathable gas (3.29) on demand
3.68
desorption
process in which one substance (the filter medium) releases an absorbed or adsorbed substance
3.69
dew point
temperature of air at a specified pressure below which condensation will occur
3.70
doffing
process of removing or taking off the respiratory protective device (3.203)
3.71
donning
process of putting on the respiratory protective device (3.203)
3.72
downstream valve
valve that opens with the pressure of the air and is normally kept shut by means of a spring
3.73
drip
to run or fall in drops or blobs
3.74
dynamic breathing resistance
differential pressure caused by a respiratory protective device (3.203) when the breathable gas (3.29)
is delivered by a breathing machine (3.38) adjusted to a specified breathing minute volume (3.153) and
waveform
3.75
dynamic flame test
test where the specimen is moving over the flame for the exposure
3.76
elastance
E
pressure change resulting from a volume change
Note 1 to entry: It is expressed in kPa/l.
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3.77
end-of-service-life indicator
ESLI
system that warns the wearer (3.257) of the gas filtering respiratory protective device (3.102) of the
approach of the end of respiratory protection
3.78
escape respiratory protective device
escape RPD
RPD (3.203) designed to be used only during an escape from hazardous atmospheres (3.108)
3.79
exhalation valve
non-return valve that allows the release of exhaled and excess breathable gas (3.29) from the respiratory
protective device (3.203)
3.80
exhaled air
air breathed out by the wearer (3.257)
3.81
exposed part
part that can be touched in an as-worn state by the exposed surface identification probe specified in
ISO 16900-5
3.82
face blank
main body of a facepiece (3.83) to which the functional components are attached
3.83
facepiece
part of a respiratory protective device (3.203) that connects the wearer's (3.257) respiratory tract to the
other parts of the device and isolates the respiratory tract from ambient atmosphere (3.12)
Note 1 to entry: Facepieces may be full face masks (3.96), half masks (3.104), quarter masks (3.192), mouthpiece
assemblies (3.157) or filtering facepieces (3.89).
Note 2 to entry: Helmets (3.113), hoods (3.115), blouses (3.23) and suits may serve the same purpose.
3.84
face-seal leakage
leakage between the wearer's (3.257) face and the respiratory interface (3.202)
3.85
field of vision
area of fixed sight while wearing a respiratory protective device (3.203)
3.86
filter
device intended to remove specific contaminants (3.59) from the ambient air passing through it
3.87
filter holder
filter housing
component that is attached to either a respiratory interface (3.202) or another part of the respiratory
protective device (3.203) and into which a filter (3.86), either encapsulated or un-encapsulated, is
inserted
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3.88
filter self rescuer
respiratory protective device (3.203) exclusively intended for escape, incorporating a filter (3.86) against
carbon monoxide through which the ambient air is drawn to a facepiece (3.83)
3.89
filtering facepiece
respiratory protective device (3.203) entirely or substantially constructed of filtering material
Note 1 to entry: Marked "FF" for filtering facepiece.
3.90
filtering respiratory protective device
filtering RPD
assisted or unassisted RPD (3.203) in which air passes through a gas filter(s) (3.98), particle filter(s)
(3.171) or combined filter(s) (3.50) before being inhaled
3.91
fit test
use of a challenge agent and specific protocol to qualitatively or quantitatively determine the
effectiveness of the seal between the wearer's (3.257) face and respiratory interface (3.202) with a
specific make, model and size of a respiratory protective device (3.203)
3.92
flow rate
V
fl
volume (mass) of breathable gas (3.29) passing through the device in a given time
3.93
fogging
reduction of the field of vision (3.85) and/or visual acuity caused by the condensation of humidity on the
visor (3.252)
3.94
force-fitting
practice of repeating a failed fit test (3.91) with the same respiratory protective device (RPD) (3.203)
more than three times, re-donning, or otherwise adjusting the RPD (e.g. over-tightening the straps),
until a passing fit test is finally achieved
3.95
fresh air hose breathing apparatus
respiratory protective device (3.203) in which breathable air (3.28) is obtained through an air supply
hose (3.9) either assisted or unassisted
3.96
full face mask
tight-fitting respiratory interface (3.241) covering the mouth, nose, eyes and chin
3.97
gas
fluid that is in a gaseous state at a standard temperature and pressure that expands to occupy the space
or enclosure in which it is confined
3.98
gas filter
filter (3.86) intended to remove specific gases (3.97) and vapours (3.251) from the atmosphere passing
through it
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3.99
gas filter capacity
mass or volume of a specific test agent that is removed or retained by a gas filter (3.98) or combined
filter (3.50) under specified conditions of temperature, humidity, challenge test gas concentration and
flow rate (3.92) at breakthrough concentration (3.26)
Note 1 to entry: The mass or volume is determined by measuring the breakthrough tim
...