ISO 17723-1:2019

INTERNATIONAL ISO
STANDARD 17723-1
First edition
2019-08
PPE ensembles for firefighters
undertaking hazardous materials
response activities —
Part 1:
Gas-tight, vapour-protective
ensembles for emergency response
teams ("type 1")
Équipement de protection personnelle pour pompiers entreprenant
des activités de réponse de produits dangereux —
Partie 1: Ensembles hermétiques au gaz et à la vapeur pour équipes
d'urgence («type 1»)
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Ensemble requirements . 5
4.1 General requirements . 5
4.1.1 Minimum ensemble configuration . 5
4.1.2 Hood visor . 5
4.1.3 Respiratory protective device . 5
4.1.4 Designation of ensemble use . 6
4.1.5 Integration of ensemble . . 6
4.1.6 Attachment of lifeline and other equipment. 6
4.1.7 Optional requirements for integrity for escape from chemical flash fire . 6
4.2 Ensemble requirements pertaining to chemical protective suits . 6
4.2.1 Additional or other PPE . 6
4.2.2 Protective covers for exhaust valves . 6
4.2.3 Suit design . 7
4.2.4 Whole suit performance . 7
4.2.5 Practical performance test . 7
4.3 Ensemble requirements pertaining to gloves . 7
4.3.1 Outer gloves . 7
4.3.2 Removal and replacement of gloves . 7
4.4 Ensemble requirements pertaining to footwear . 7
4.4.1 Bootees . 7
4.4.2 Separate boots . 7
4.4.3 Footwear splash flap. 7
5 Requirements for suit materials . 7
5.1 General requirements . 7
5.1.1 Suit material layers . 7
5.1.2 Materials for testing of permeation resistance . 8
5.1.3 Materials for testing of physical properties . 8
5.2 Permeation resistance . 8
5.3 Suit material physical properties . 9
5.4 Suit material flame resistance . 9
5.4.1 Requirements . 9
5.4.2 Limited-use suits .10
5.4.3 Re-usable suits .10
6 Requirements for suit components and assemblies .10
6.1 Seams .10
6.1.1 Seam strength .10
6.1.2 Seam permeation resistance .10
6.2 Visors .10
6.2.1 Visor materials for testing .10
6.2.2 Visor physical performance.10
6.2.3 Distortion of vision .10
6.2.4 Visor permeation resistance .10
6.2.5 Chemical degradation of visor .11
6.3 Gloves .11
6.3.1 Attached gloves .11
6.3.2 Assembly strength between gloves and suit sleeve .11
6.3.3 Glove material permeation resistance .11
6.3.4 Glove material physical properties .11
6.4 Footwear .13
6.4.1 Requirements for ensembles incorporating bootees and separate boots .13
6.4.2 Requirements for ensembles using attached boots .13
6.4.3 Additional requirements .14
6.4.4 Resistance to flame .14
6.4.5 Permeation resistance .14
6.5 Closures .14
6.5.1 Closure physical performance .14
6.5.2 Closure system permeation resistance .15
7 Optional requirements for protection against chemical terrorism and biological
agents under non-military circumstances .15
7.1 Additional ensemble requirement .15
7.2 Additional ensemble material requirements .15
7.2.1 Chemical terrorism agent permeation resistance.15
7.2.2 Biological agent penetration resistance .15
8 Labelling .15
9 Instructions for use and information supplied by the manufacturer .16
Annex A (normative) Practical performance test .18
Annex B (informative) Guidelines for selection of personal protective equipment for
hazardous materials response .22
Annex C (informative) Adapted test cell for testing closures (zipper) .26
Annex D (normative) Distortion of vision test for visors .27
Annex E (normative) Cumulative chemical permeation test requirements for chemical
terrorism agents .28
Annex F (normative) Permeation preconditioning (flexing and abrasion) .29
Annex G (informative) Illustration of hierarchy of terms related to a chemical protective
ensemble .30
Bibliography .31
iv © ISO 2019 – All rights reserved

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
clothing equipment, Subcommittee SC 14, Firefighter’s personal equipment.
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.
Introduction
The purpose of this document is to provide minimum design and performance requirements for personal
protective equipment, excluding respiratory protective devices (RPD), designed for protection against
chemicals, including gases, vapours, liquids, and particulates during hazardous materials response
by the emergency response teams of the fire services. This specific document addresses the highest
form of protection for hazardous materials responses involving chemical gases, vapours, liquids, and
particulates. Annex B provides a recommendation for selection of personal protective equipment for
hazardous materials response.
Hazardous materials response involves significant potential dangers to the emergency responder.
Accordingly, a risk assessment is undertaken to determine if the personal protective equipment covered
by this standard is suitable for its intended use and the expected exposure. A risk assessment includes
what additional personal protective equipment is necessary.
Emergency responders need to be trained in the selection, use, care and maintenance of the personal
protective equipment covered by this document, including an understanding of its limitations.
vi © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 17723-1:2019(E)
PPE ensembles for firefighters undertaking hazardous
materials response activities —
Part 1:
Gas-tight, vapour-protective ensembles for emergency
response teams ("type 1")
1 Scope
This document establishes minimum design and performance requirements for personal protective
ensembles to be worn during hazardous materials responses involving chemical gas, vapour, liquid, and
particulate hazards. This document provides optional criteria to address protection during terrorism
involving chemical and biological agents. This document provides optional criteria to address the
ability of ensembles to retain their integrity during escape in the event of chemical flash fire. This
document does not establish minimum criteria for protection against radiological hazards, flammable,
or explosive atmospheres. This document does not pertain to clothing providing the high level of heat
and flame protection that is required for fighting fires. This document does not address respiratory
protection.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 4674-1, Rubber- or plastics-coated fabrics — Determination of tear resistance — Part 1: Constant rate
of tear methods
ISO 7854, Rubber- or plastics-coated fabrics — Determination of resistance to damage by flexing
ISO 10874:2009, Resilient, textile and laminate floor coverings — Classification
ISO 12947-1, Textiles — Determination of the abrasion resistance of fabrics by the Martindale method —
Part 1: Martindale abrasion testing apparatus
ISO 12947-2, Textiles — Determination of the abrasion resistance of fabrics by the Martindale method —
Part 2: Determination of specimen breakdown
ISO 13688, Protective clothing — General requirements
ISO 13996, Protective clothing — Mechanical properties — Determination of resistance to puncture
ISO 13997, Protective clothing — Mechanical properties — Determination of resistance to cutting by
sharp objects
ISO 16602:2007/Amd1: 2012, Protective clothing for protection against chemicals — Classification,
labelling and performance requirements
ISO 16604, Clothing for protection against contact with blood and body fluids — Determination of
resistance of protective clothing materials to penetration by blood-borne pathogens — Test method using
Phi-X 174 bacteriophage
ISO 17491-1, Protective clothing — Test methods for clothing providing protection against chemicals —
Part 1: Determination of resistance to outward leakage of gases (internal pressure test)
ISO 17491-2, Protective clothing — Test methods for clothing providing protection against chemicals —
Part 2: Determination of resistance to inward leakage of aerosols and gases (inward leakage test)
ISO 20345:2011, Personal protective equipment — Safety footwear
ISO 23388, Protective gloves against mechanical risks
EN 13274-4, Respiratory protective devices — Methods of test — Part 4: Flame tests
EN 15090:2012, Footwear for firefighters
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
NOTE A graphical hierarchy of terms is provided in Annex G.
3.1
abrasion rub
one revolution of the outer drives of the Martindale abrasion tester
Note 1 to entry: See ISO 12947-1.
[SOURCE: ISO/TR 19591:2018, 3.2, modified — Note 1 to entry added.]
3.2
biological agents
biological materials capable of causing an acute disease or long term damage to the human body
[SOURCE: ISO/TR 19591:2018, 3.20]
3.3
bootee
sock-like extension of the chemical protective suit (3.7)
[SOURCE: ISO/TR 19591:2018, 3.24, modified — Note 1 to entry deleted.]
3.4
chemical flash fire
ignition of a flammable vapour or gas that produces an outward expanding flame front, as those
vapours or gases burn
Note 1 to entry: This burning and expanding flame front (fire ball) will release both thermal and kinetic energy
to the environment.
[SOURCE: ISO/TR 19591:2018, 3.35]
3.5
chemical protection layer
layer or layers included in the composite that provide resistance to ingress by chemicals and to provide
gas-tight integrity for the purpose of providing protection from chemical hazards
[SOURCE: ISO/TR 19591:2018, 3.36, modified — The phrase "penetration resistance against" was
replaced by "resistance to ingress by".]
2 © ISO 2019 – All rights reserved

3.6
chemical protective clothing
combined assembly of garments worn to provide protection to the skin against exposure to or contact
with chemicals
[SOURCE: ISO/TR 19591:2018, 3.37]
3.7
chemical protective suit
clothing worn to protect against chemicals that covers the whole, or greater part of the body
Note 1 to entry: A chemical protective suit can comprise of garments combined together to provide protection
to the body. A suit can also have various types of additional protection such as hood or helmet, boots and gloves
(3.16), joined with it.
[SOURCE: ISO/TR 19591:2018, 3.39]
3.8
chemical terrorism agents
liquid, solid, gaseous and vapour chemicals capable of inflicting lethal or incapacitating injuries,
generally on a civilian population as a result of a terrorist attack
[SOURCE: ISO/TR 19591:2018, 3.41, modified — The word "casualties" was replaced by "injuries".]
3.9
closure
device to open and close openings for doffing and donning of protective clothing
3.10
closure system
method of fastening openings in the garment including combinations of more than one method of
achieving a secure closure (3.9)
EXAMPLE A slide fastener covered by an over flap fastened down with a touch and close fastener.
Note 1 to entry: This term does not cover seams (3.21).
[SOURCE: ISO/TR 19591:2018, 3.49]
3.11
component
part or sub-assembly of a protective item
[SOURCE: ISO/TR 19591:2018, 3.61, modified — Deleted "necessary for it to meet its respective
requirements".]
3.12
emergency response team
firefighters and other first responders that are trained and equipped to respond to incidents involving
the release of hazardous materials
[SOURCE: ISO/TR 19591:2018, 3.93, modified — The phrase "accidental release" was replace by
"release".]
3.13
exhaust valve
component (3.11) of a chemical protective suit (3.7) that prevents over pressurization of the suit
[SOURCE: ISO/TR 19591:2018, 3.97]
3.14
footwear
component (3.11) of the protective ensemble designed to provide protection to the foot, ankle, and
possibly the lower leg
[SOURCE: ISO/TR 19591:2018, 3.119, modified — The word "possibly" was added.]
3.15
gas-tight, vapour-protective ensemble
multiple items of clothing and equipment which when used together provide a high degree of protection
for emergency responders from the adverse exposures to the inherent risks of hazardous materials and
that demonstrate gas-tight integrity
Note 1 to entry: The elements of the gas-tight, vapour-protective ensemble include the chemical protective suit
(3.7), gloves (3.16), and footwear (3.14).
Note 2 to entry: The gas-tight, vapour-protective ensemble can either be of limited use or re-usable construction,
see 3.18 and 3.20.
Note 3 to entry: When referring to an “ensemble”, in the latter part of this document, gas-tight, vapour-protective
ensemble is meant.
[SOURCE: ISO/TR 19591:2018, 3.131, modified — The notes 2 and 3 to entry were added.]
3.15.1
type 1a ensemble
gas-tight ensemble with a breathable gas supply that is independent of the ambient atmosphere
EXAMPLE An ensemble with RPD, type SCBA (self-contained breathing apparatus) worn inside.
3.15.2
type 1b ensemble
gas-tight ensemble with a breathable gas supply worn outside
EXAMPLE An ensemble with RPD, type SCBA (self-contained breathing apparatus) worn outside.
3.16
glove
personal protective equipment (PPE) which protects the hand or part of the hand against hazards
Note 1 to entry: It can additionally cover part of the forearm and arm.
[SOURCE: ISO/TR 19591:2018, 3.133]
3.17
lifeline
attached rope the purpose of which is to help to retrieve and pull someone back to safety
Note 1 to entry: This item should not be considered to be a fall-protection device.
3.18
limited-use chemical protective suit
chemical protective suit (3.7) for limited duration of use, i.e., to be worn until hygienic cleaning becomes
necessary or chemical contamination has occurred and disposal is required
Note 1 to entry: This includes protective suits for single use and for limited re-use according to the information
provided by the manufacturer.
[SOURCE: ISO/TR 19591:2018, 3.179, modified — The word "clothing" was replaced by "suit" in both the
term and the definition.]
4 © ISO 2019 – All rights reserved

3.19
permeation
process by which a chemical moves through a material on a molecular level
Note 1 to entry: Permeation involves:
— sorption of the molecules of the chemical into the contacted (outside) surface of a material;
— diffusion of the sorbed molecules in the material, and;
— desorption of the molecules from the opposite (inner) side of the material.
[SOURCE: ISO/TR 19591:2018, 3.230]
3.20
re-usable chemical protective suit
chemical protective suit (3.7) that is constructed from materials allowing the clothing to be cleaned
after repeated chemical exposures such that it remains suitable for continued use
[SOURCE: ISO/TR 19591:2018, 3.261, modified — The word "clothing" was replaced by "suit" in both
the term and the definition.]
3.21
seam
permanent junction between two or more pieces of material created by sewing, welding or other method
Note 1 to entry: Seams include the permanent joining of suit material to suit material and suit material to other
materials of construction such as integral visor (3.22) materials (visor seams), bootees (3.4) if they are different
from the suit material and also permanently attached gloves (3.16) and boots.
[SOURCE: ISO/TR 19591:2018, 3.267, modified — Note 1 to entry was added.]
3.22
visor
portion of the chemical protective suit (3.7) that permits the user to see out of the ensemble
[SOURCE: ISO/TR 19591:2018, 3.327]
4 Ensemble requirements
4.1 General requirements
4.1.1 Minimum ensemble configuration
The gas-tight, vapour-protective ensemble shall consist of a chemical protective suit incorporating
hood, gloves, footwear and RPD (respiratory protective device).
4.1.2 Hood visor
For type 1a ensembles, the suit hood shall be provided with a visor that is designed to allow the wearer
to see out of the ensemble.
4.1.3 Respiratory protective device
For type 1b ensemble, any part of the respiratory protective device that forms the primary barrier
between the outside environment and the wearer, for example the RPD respiratory interface materials
and hoseline and the seams and/or joins associated with, are considered part of the ensemble and shall
be subjected to testing as applicable for chemical protection.
NOTE RPD ISO standards are under development to provide the adequate chemical testing. This document
will be updated, amended or revised to reflect or refer to this information.
4.1.4 Designation of ensemble use
The manufacturer shall designate the ensemble as single use, limited use or re-usable.
4.1.5 Integration of ensemble
Other than outer gloves and separate boots, ensembles shall be designed so that all separate components
are securely attached and provided as a single and integrated unit. The use of additional covers or
outer garments, layers or components shall not be allowed to fulfil the mandatory requirements of this
document.
4.1.6 Attachment of lifeline and other equipment
Pass-throughs providing breathing air into chemical protective suits shall withstand a pull force of at
least 1 000 N. The force shall be at least 1 000 N for life-lines, 250 N for equipment attachment points,
150 N for exhalation valves and 100 N for boots and gloves.
Testing shall be in accordance with ISO 16602:2007/Amd1: 2012, Annex B.
4.1.7 Optional requirements for integrity for escape from chemical flash fire
As an option, the ensemble may be tested for integrity for escape from chemical flash fire. The ensemble
shall fulfil the following requirements when tested, according to NFPA 1991:2016, Clause 8.25, ensemble
flash test.
The ensemble shall not exhibit any afterflame times longer than 2 s.
After the flash fire exposure the ensemble shall be tested in accordance with ISO 17491-1, Method 1, the
ensemble shall not have a pressure drop of more than 40 %. Remove any other items of PPE which are
not required to meet the basic requirements of this document before the leak tightness test. The visor
shall pass the requirement of 6.2.3.
NOTE Ensembles meeting these requirements are intended to offer the wearer limited protection for escape
only in situations that can result in chemical flash fires. This requirement does not imply any protection for any
fire-fighting activities but offers minimum protection from the thermal effects of a chemical flash fire with no
loss of suit gastight integrity.
4.2 Ensemble requirements pertaining to chemical protective suits
4.2.1 Additional or other PPE
The ensemble itself shall meet all mandatory chemical and physical requirements of this document,
with the exception of gloves 4.3.1, and footwear 4.4.2. Any other optionally wearable covers shall not
be allowed to provide or negatively impact the mandatory chemical and physical requirements of this
document, but may provide additional protection based on other optional requirements.
4.2.2 Protective covers for exhaust valves
Protective covers shall be provided to protect the exhaust valves from direct chemical splashes to
the diaphragm and interior of the exhaust valve(s). These protective covers shall be made of either
the chemical protective suit material or another material meeting the minimum chemical permeation
resistance requirements of this document. The covers shall allow access to the valves for removal and
inspection.
6 © ISO 2019 – All rights reserved

4.2.3 Suit design
Type 1a ensembles shall allow wearing of a compressed breathable gas RPD inside the suit. Type 1a
ensembles shall allow the wearing of head protection if required inside the suit.
4.2.4 Whole suit performance
Chemical protective suits used in ensembles shall fulfil the whole suit performance requirements for
the appropriate "type 1" gas-tight chemical protective suits specified in ISO 16602/Amd1: 2012.
4.2.5 Practical performance test
The practical performance test specified in Annex A shall be carried out and the ensemble shall permit
the test subjects to carry out all tasks without damage to the suit material or to the integrity of the
ensemble. It shall also pass the requirements of the assessment described in A.6.
4.3 Ensemble requirements pertaining to gloves
4.3.1 Outer gloves
It shall be permitted to use an outer glove designed to be worn over the ensemble gloves where
additional gloves are needed to meet the glove mechanical requirements in this document.
4.3.2 Removal and replacement of gloves
When designed for removal and replacement, gloves attached to the chemical protective suit shall be
exchangeable within 30 min per pair.
This shall be evaluated as part of the practical performance using the manufacturer's instructions.
4.4 Ensemble requirements pertaining to footwear
4.4.1 Bootees
The ensemble shall be permitted to be configured with bootees.
4.4.2 Separate boots
The footwear portion of the ensemble shall be permitted to be constructed using a separate boot
designed to be worn over the ensemble footwear or chemical protective suit bootees where additional
footwear is needed to meet the footwear mechanical requirements in this document.
4.4.3 Footwear splash flap
When designed to be worn with separate boots, the chemical protective suit shall be equipped with a
flap that prevent liquids running off the suit into the boot.
5 Requirements for suit materials
5.1 General requirements
5.1.1 Suit material layers
Any optionally wearable layers, such as other PPE as described in 4.2.1, shall not be allowed to provide
or contribute to the mandatory chemical and physical properties when testing to this document.
5.1.2 Materials for testing of permeation resistance
The chemical protection layer(s) shall be tested for permeation resistance. Any additional layers that
may complicate or interfere with the permeation test shall be allowed to be removed.
5.1.3 Materials for testing of physical properties
The chemical protection layer shall be the sole component for testing purposes for puncture resistance,
abrasion resistance, flex cracking resistance, and resistance to flame testing as long as the requirement
of 5.1.1 is fulfilled.
The intention of 5.1.1 and 5.1.3 is that cover garments or outer layers shall not be used to fulfil the
requirements of this document if they are detachable and optionally wearable.
5.2 Permeation resistance
Chemical protective suit materials shall be tested for permeation resistance as specified in
ISO 16602:2007/Amd1: 2012, 6.5, after preconditioning as specified in Annex F for each chemical listed
in Table 1.
The selection of the chemicals from Table 1 shall be made by the manufacturer or applicant for the
respective requirements described below.
All materials of construction of the whole ensemble shall be tested against the same set of at least 14
selected chemicals from Table 1 and shall achieve a result of Class 3 or higher.
For the remaining maximum 2 selected chemicals from Table 1, all materials of construction of the
whole ensemble shall achieve Class 1 or higher. If Class 1 is not achieved for either of these two chemicals
from Table 1 and for any material or component part tested from the whole ensemble, the instructions
for use shall identify that this gas-tight chemical protective suit is not suitable for use for this chemical
under continuous exposure.
Table 1 — Chemicals for permeation tests
Name CAS number Physical state
Acetone (2-propanone) 67-64-1 liquid
Acetonitrile (cyanomethane, methyl cyanide) 75-05-8 liquid
Ammonia, anhydrous (99,99 %) 7664-41-7 gas
Carbon disulphide 75-15-0 liquid
Chlorine (99,5 %) 7782-50-5 gas
Dichloromethane (methylene chloride) 75-09-2 liquid
Diethylamine 109-89-7 liquid
Ethyl acetate 141-78-6 liquid
n-Hexane 110-54-3 liquid
Hydrogen chloride (99,0 %) (hydrochloric acid) 7647-01-0 gas
Methanol (methyl alcohol, carbinol) 67-56-1 liquid
Sodium hydroxide (30 % by mass), ρ = 1,33 kg/l 1310-73-2 liquid
Sulphuric acid (96 % by mass), ρ = 1,83 kg/l to 1,84 kg/l 7664-93-9 liquid
Sulphuric acid (18 % by mass) liquid
Tetrahydrofuran (THF, 1,4-epoxybutane) 109-99-9 liquid
Toluene (toluol) 108-88-3 liquid
8 © ISO 2019 – All rights reserved

5.3 Suit material physical properties
Chemical protective suit materials shall meet the physical property requirements as specified in Table 2
for testing conducted in accordance with ISO 16602:2007/Amd1: 2012, 6.10 to 6.15.
Table 2 — Minimum physical property classes for limited use and re-usable chemical
protective suits
Limited use chemical Re-usable chemical
Suit material physical property
protective suits protective suits
Tensile strength, ISO 16602:2007/Amd1: 2012, 6.10 Class 4 Class 6
Tear resistance, ISO 16602:2007/Amd1: 2012, 6.11 Class 3 Class 3
Puncture resistance, ISO 16602:2007/Amd1: 2012, 6.12 Class 2 Class 3
Abrasion resistance ISO 16602:2007/Amd1: 2012, 6.14 Class 4 Class 6
Flex cracking resistance, ISO 16602:2007/Amd1: 2012,
Class 1 Class 4
6.15 using ISO 7854, Method B
Flex cracking at low temperatures (−30 °C),
ISO 16602:2007/Amd1: 2012, 6.15 using ISO 7854, Class 2 Class 2
Method B.
5.4 Suit material flame resistance
5.4.1 Requirements
The test for resistance to ignition specified in 5.4 is intended to evaluate only that a material is not of
a highly flammable nature. A material which passes this ignition evaluation may not offer sufficient
protection against heat and flame.
NOTE Conformity with this clause in no way implies that the ensemble is suitable for in fire situations or
in close proximity to naked flames. The test method called up in this section is only sufficient to show that the
ensemble does not, in itself, present a fire hazard in the event of unforeseen accidental exposure to an ignition
source. Many type 1A ensembles are manufactured from combustible materials and will burn in a fire.
If resistance to heat and flame is required the chemical protective clothing should be tested and marked
according to the appropriate International Standard (e.g. ISO 14116 or ISO 11612).
The chemical protective clothing material shall not form droplets and shall prove to be “self-
extinguishing”, i.e. it shall not be of a highly flammable nature and when tested shall not continue to
burn for more than 5 s after removal from the flame.
To determine the pass/fail criteria performance after exposure to flame in either 5.4.2 or 5.4.3, the leak
tightness of each of the test specimens of a material sample shall be determined before and after flame
exposure.
For each test specimen, the test area of the specimen prior and after to flame exposure shall be
clamped in the rectangular test pot apparatus, designed according to the specifications given in
ISO 16602:2007/Amd1: 2012 Annex G, with the rectangular dimensions appropriate to hold the test
specimen and the pressure in the test pot shall then be reduced by 1 kPa (10 mbar). The increase of
pressure after 1 min shall be measured and recorded.
The difference in the change of pressure in 1 min between a specimen prior to flame exposure and
the same specimen after flame exposure shall be calculated. The maximum resultant value of the
difference in the change of pressure in 1 min between new and exposed shall be determined for the set
of specimens.
5.4.2 Limited-use suits
Limited-use chemical protective suit materials shall be tested in accordance with EN 13274-4, Method
3 modified as follows. Three specimens having the minimum dimensions 50 mm by 105 mm shall be
tested. The specimens shall be passed through the flame as described in EN 13274-4, Method 3 with
the outer side of the clothing material exposed to the flame. The test specimen shall be mounted in such
a way, so that the 105 mm edge is perpendicular to the direction of travel of the specimen above the
flame and the path length of the specimen above the flame is 50 mm.
5.4.3 Re-usable suits
Re-usable chemical protective suit materials shall be tested in accordance with EN 13274-4, Method 3
modified as follows. Three specimens having the minimum dimensions 50 mm by 105 mm shall be tested.
The specimens shall not be passed through the flame but stopped and held still in the flame for 5 s.
6 Requirements for suit components and assemblies
6.1 Seams
6.1.1 Seam strength
Seams used in the construction of chemical protective suits shall meet the Class 5 requirement for seam
strength as specified in ISO 16602:2007/Amd1: 2012, 7.5.2.
6.1.2 Seam permeation resistance
Chemical protective suit seams shall meet the permeation requirements of 5.2.
6.2 Visors
6.2.1 Visor materials for testing
Any part of the respiratory protective device that forms the primary barrier between the outside
environment and the wearer shall be tested. Therefore either the suit visor (type 1a) and seams or the
visor of the RPD respiratory interface (type 1b), are considered part of the chemical protective suit and
are therefore subject to testing according to the requirements specified in 6.2.2 to 6.2.4 and 6.2.5 if
required by 6.2.4.
6.2.2 Visor physical performance
Visor materials shall meet the requirements for field of vision, impact resistance, and resistance to
ignition as specified in ISO 16602:2007/Amd1: 2012, 7.6.3, 7.6.4 and 7.6.5.
6.2.3 Distortion of vision
The loss of sight shall not exceed two tenths on an optometric chart when reading letters on the chart at
a distance of 5 m. Test according to Annex D.
6.2.4 Visor permeation resistance
Visor materials shall meet Class 3 requirements for permeation resistance as specified in
ISO 16602:2007/Amd1: 2012, 7.6.2, for each chemical listed in Table 1.
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6.2.5 Chemical degradation of visor
This test shall only be carried out with those test chemicals for which the test according to 6.2.4 has led
to any indication of harm to the optical properties. When tested as specified below the visor shall pass
for each chemical tested.
A test piece of visor material with the dimension
...