oSIST prEN ISO 17491-4:2023
(Main)Protective clothing - Test methods for clothing providing protection against chemicals - Part 4: Determination of resistance to penetration by a spray of liquid (spray test) (ISO/DIS 17491-4:2023)
Protective clothing - Test methods for clothing providing protection against chemicals - Part 4: Determination of resistance to penetration by a spray of liquid (spray test) (ISO/DIS 17491-4:2023)
Schutzkleidung - Prüfverfahren für Chemikalienschutzkleidung - Teil 4: Bestimmung der Beständigkeit gegen das Durchdringen von Flüssigkeitsspray (Spray-Test) (ISO/DIS 17491-4:2023)
Habillement de protection - Méthodes d’essai pour les vêtements fournissant une protection contre les produits chimiques - Partie 4: Détermination de la résistance à la pénétration par pulvérisation de liquide (essai au brouillard) (ISO/DIS 17491-4:2023)
Varovalna obleka - Preskusne metode za obleke, ki varujejo pred kemikalijami - 4. del: Ugotavljanje odpornosti materialov proti penetraciji z razprševanjem (spray test) (ISO/DIS 17491-4:2023)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 17491-4:2023
01-julij-2023
Varovalna obleka - Preskusne metode za obleke, ki varujejo pred kemikalijami - 4.
del: Ugotavljanje odpornosti materialov proti penetraciji z razprševanjem (spray
test) (ISO/DIS 17491-4:2023)
Protective clothing - Test methods for clothing providing protection against chemicals -
Part 4: Determination of resistance to penetration by a spray of liquid (spray test)
(ISO/DIS 17491-4:2023)
Schutzkleidung - Prüfverfahren für Chemikalienschutzkleidung - Teil 4: Bestimmung der
Beständigkeit gegen das Durchdringen von Flüssigkeitsspray (Spray-Test) (ISO/DIS
17491-4:2023)
Habillement de protection - Méthodes d’essai pour les vêtements fournissant une
protection contre les produits chimiques - Partie 4: Détermination de la résistance à la
pénétration par pulvérisation de liquide (essai au brouillard) (ISO/DIS 17491-4:2023)
Ta slovenski standard je istoveten z: prEN ISO 17491-4
ICS:
13.340.10 Varovalna obleka Protective clothing
oSIST prEN ISO 17491-4:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 17491-4:2023
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oSIST prEN ISO 17491-4:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17491-4
ISO/TC 94/SC 13 Secretariat: SNV
Voting begins on: Voting terminates on:
2023-06-01 2023-08-24
Protective clothing — Test methods for clothing providing
protection against chemicals —
Part 4:
Determination of resistance to penetration by a spray of
liquid (spray test)
Vêtements de protection — Méthodes d'essai pour les vêtements fournissant une protection contre les
produits chimiques —
Partie 4: Détermination de la résistance à la pénétration par vaporisation de liquide (essai au brouillard)
ICS: 13.340.10
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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THEREFORE SUBJECT TO CHANGE AND MAY
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STANDARD UNTIL PUBLISHED AS SUCH.
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NATIONAL REGULATIONS.
ISO/DIS 17491-4:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
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oSIST prEN ISO 17491-4:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 17491-4
ISO/TC 94/SC 13 Secretariat: SNV
Voting begins on: Voting terminates on:
Protective clothing — Test methods for clothing providing
protection against chemicals —
Part 4:
Determination of resistance to penetration by a spray of
liquid (spray test)
Vêtements de protection — Méthodes d'essai pour les vêtements fournissant une protection contre les
produits chimiques —
Partie 4: Détermination de la résistance à la pénétration par vaporisation de liquide (essai au brouillard)
ICS: 13.340.10
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
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© ISO 2023
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 17491-4:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
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ii
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PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
Contents Page
Foreword .iv
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle of test method .2
5 Test liquid . 2
6 Apparatus and test subjects . 3
6.1 Absorbent overall . 3
6.2 Calibrated stain . . 3
6.3 Turntable. 3
6.4 Test liquid container . 3
6.5 Hydraulic pump . 3
6.6 Stopwatch . 3
6.7 Spray booth . 3
6.8 Spray boom . 4
6.9 Hydraulic nozzles . 4
6.10 Test Subjects and test subject dimensions . 5
7 Preparation of the test subjects for the spray test . 5
8 Preparation of the spray application system . 5
8.1 Test liquid . 5
8.2 Nozzle output . 5
8.3 Distribution of the spray liquid and alignment of spray nozzles . 6
9 Procedure .7
9.1 Spray procedure . 7
9.2 Procedure for penetration and stains . 8
10 Test report . 9
Annex A (informative) The non-absorbent fabric and absorbent overall.10
Annex B (informative) Body Measurements and Selection Sizing of the Test Garment .11
Annex C (Normative) Donning and doffing of test garment and marking of stain .13
Annex D (informative) Inter-laboratory Study (ILS) observations for ISO 17491-4 Method
A and B .15
Bibliography .19
iii
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(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 — Protective
clothing and equipment, Subcommittee SC 13, Protective clothing, in collaboration with the European
Committee for Standardization, (CEN) Technical Committee CEN/TC 162, Protective clothing including
hand and arm protection and lifejackets, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 17491-4:2008), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— specifications for test liquid have been revised/added;
— clause 6 Apparatus and test subjects has been revised to provide more specificity. Specification
have been changed and/or revised for absorbent overall, calibrated stain, turntable, spray booth,
spray boom, hydraulic nozzles in Clause 6 and other applicable clauses;
— details for the selection of the right overall size have been added in sub-clause 6.10 as well as in
Annex B;
— sub-clause 8.3 has been revised and heading changed to “Distribution of the spray liquid and
alignment of spray nozzles.”;
— figure and additional information have been added in sub-clause 9.1 to provide more specificity;
— inclusion of Annex A on absorbent fabric for the detector suit and non-absorbent fabric for the
calibration pattern;
— inclusion of Annex B on test subject size measurement and right overall size fitting;
— inclusion of Annex C on right donning and doffing, as well as stain area measurement;
— inclusion of Annex D with the ILT results.
iv
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
A list of all parts in the ISO 17491 series can be found on the ISO website.
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.
v
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
Introduction
This part of ISO 17491 describes a test method for determining the spray penetration resistance of
chemical protective clothing Type 4 (with spray-tight connections between different parts of the
clothing and, if applicable, between the clothing and other items of personal protective equipment) and
Type 6 (limited performance protective clothing).
Such clothing comprises one or more items covering the full surface of the body and is intended to
be worn under conditions where there is a risk of exposure to a spray of a liquid chemical. Other
requirements with regard to this type of clothing and its constituent materials can be found in the
[1]
respective product standards .
Interlaboratory testing has shown that this test method is a repeatable pass/fail method.
[2]
A document on the selection, use and maintenance of chemical protective clothing is available .
vi
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oSIST prEN ISO 17491-4:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 17491-4:2023(E)
Protective clothing — Test methods for clothing providing
protection against chemicals —
Part 4:
Determination of resistance to penetration by a spray of
liquid (spray test)
CAUTION — Some of the procedures specified in this part of ISO 17491 involve the use of
processes which could lead to hazardous situations and hence appropriate precautions should
be taken.
1 Scope
This part of ISO 17491 specifies methods for determining the resistance of chemical protective clothing
to penetration by sprays of liquid chemicals at two different levels of intensity:
a) Method A: low-level spray test. This is applicable to clothing that covers the full body surface and
is intended to be worn when there is a potential risk of exposure to small quantities of spray or
accidental low-volume splashes of a liquid chemical.
b) Method B: high-level spray test. This is applicable to clothing with spray-tight connections between
different parts of the clothing and, if applicable, between the clothing and other items of personal
protective equipment, which covers the full body surface and which is intended to be worn when
there is a risk of exposure to sprayed liquid chemical.
This part of ISO 17491 does not address chemical permeation resistance of the materials from which
the chemical protective clothing is made.
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 11610, Protective clothing — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11610 and the following apply.
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 https:// www .electropedia .org/
3.1
absorbent overall
overall made from an absorbent material, worn under the test suit and intended for collecting liquid
penetration during spray and jet testing of chemical protective clothing.
1
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
3.2
calibrated stain
visible stain, with a defined minimum area, generated by dropping a specified quantity of test liquid on
to an absorbent overall
Note 1 to entry: The calibrated stain is used to measure liquid penetration during spray and jet testing of
chemical protective clothing.
3.3
connection
assemblage or joint
4 Principle of test method
An aqueous spray, containing a visible dye tracer, is directed under controlled conditions at the chemical
protective clothing worn by a human test subject. Inspection of the inside surface of the clothing and
the outside surface of the absorbent overall worn under the test garment allows any points of inward
leakage to be identified.
An interlab was performed and the results and conclusion can be found in Annex D.
5 Test liquid
To prepare the test chemical add methyl blue dye and dye stabilizer prior to adding the surfactant to
water. The temperature of the test liquid shall be between 20 and 30 °C.
For methods A and B, the concentration of the methyl blue dye (CAS number 28983-56-4) shall be
(0,2 ± 0,02) g/L. The dye stabilizer shall be analytical grade citric acid (CAS number 77-92-9) with a
concentration of (2,45 ± 0,05) g/L.
The surfactant is then added to achieve the required surface tension. Mixtures such as dish washing
detergent that include other ingredients are not considered surfactants and shall not be used.
−3
a) For method A: a surface tension of (52,0 ± 7,5) × 10 N/m;
−3
b) For method B: a surface tension of (30,0 ± 5,0) × 10 N/m.
NOTE 1 Surfactants: Genapol LRO liquid (sodium lauryl ether sulfate (CAS number [009004-82-4])) that can
be used to achieve the required surface tension at the concentration of 0,03 ml/L for method A and 0,5 ml/L for
method B. This information is given for the convenience of users of this part of ISO 17491 and does not constitute
an endorsement by ISO of the products named. Equivalent products may be used if they can be shown to lead to
the same results.
NOTE 2 To measure the surface tension within the stated tolerance, any suitable method may be used, e.g., a
Wright torsion balance using a standard 12 mm diameter platinum ring.
It shall be ensured that the surface tension and temperature of the test liquid are stable throughout the
test, i.e., the surface tension of the liquid leaving the nozzle as well as the tension of the liquid in the
tank shall meet the requirements. This shall be verified before and after each day of test and shall meet
all the above requirement in this clause according to either Method A or Method B.
The necessary measures shall be taken to protect the test subject and to avoid contamination of the
surface water drainage system.
2
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
6 Apparatus and test subjects
6.1 Absorbent overall
The overall shall be a one-piece garment with a hood made with absorbent white or off-white fabric.
The garment shall not include elastic waistband/gathers at the waist as it affects contact between the
test garment and the absorbent overall. The absorbent overall shall be sufficiently homogeneous to
produce absorption spots which vary less than 10 % in surface area from the mean value for a given
volume of liquid, when sampled at any place on the garment. It shall be made from a water-absorbent
material. See Annex A for absorbent overall requirements.
6.2 Calibrated stain
Calibrated stains shall be used as a reference for the pass/fail evaluation of the tested suit. Pass/fail
[1]
criteria shall be defined in the relevant product standard .
A calibration stain shall be produced only after a test where a leakage has been detected on the
absorbent overall.
Select an area of the absorbent overall where no leakage has been detected right after the doffing of
the garment. Put under it a piece of undergarment and ensure that both layers are in contact. Put the
assembly under a dispenser, with the lower tip of the dispenser at a vertical distance of (5,0 ± 0,5) cm
above the assembly. Dispense a volume of (25 ± 5) µl of the test liquid to produce a clearly visible stain
on the surface of the overall. After 5 minutes (±15 seconds), define the outline of the stain before it is
measured. Several methods can be used to measure the calibration stain, such as a planimeter. The
2
minimum area of the stain shall be 1 cm after 5 minutes (±15 seconds).
6.3 Turntable
A waterproof platform capable of supporting a test subject and rotating at (1,0 ± 0,1) full circle per
minute.
The diameter of the turntable shall be 60 cm or more.
6.4 Test liquid container
The test liquid shall be prepared and stored in a container.
6.5 Hydraulic pump
A self-priming, recirculating-type pump shall be used. The pump shall be equipped with a pressure
gauge and adjustment, a variable output control filter and hoses to convey the test liquid from the test
liquid container to the spray boom. A four-way distribution tube shall be connected to the pump outlet,
with each of the four outlets connected directly to a nozzle.
The pump shall be capable of supplying a minimum pressure of 400 kPa.
Provisions shall be taken to avoid the test starting before the pressure is completely built up.
6.6 Stopwatch
A stopwatch accurate to 1 second shall be used.
6.7 Spray booth
The size of the spray booth shall be at least 2,14 m (H) x 1,2 m (W) x 2 m (D), but shall not exceed 3 m
(H) x 3 m (W) x 3,5 m (D).
3
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
6.8 Spray boom
A vertical rod or frame to which four nozzles can be attached (45,0 ± 0,5) cm apart from each other
starting from the top of the turntable (see Figure 1). In Figure 1, the turntable surface is at the same
level as the floor. For cabins with turntable above the floor, the lowest nozzle shall be (60,0 ± 0,5) cm
from the surface of the turntable and not from the cabin floor.
Dimensions in centimetre
Key
1 turntable
2 top of turn table (cabin floor may be even with or lower than turn table)
Figure 1 — Apparatus for determining the resistance to spray
6.9 Hydraulic nozzles
Hydraulic nozzles shall be of the hollow cone type, each nozzle supplying liquid at a rate of:
— (0,47 ± 0,05) l/min at a 300 kPa pressure for method A.
— (1,14 ± 0,10) l/min at a 300 kPa pressure for method B.
Each nozzle shall be equipped with an individual pressure gauge and pressure control valve in order to
obtain the same pressure at each nozzle.
NOTE 1 Typical spray nozzles may be obtained from Lurmark (Hypro EU Ltd, Longstanton, Cambridge CB4
5DS, UK), Agrotop (Agrotop GmbH, Obertraubling 93083, Germany), Albuz (Solcera, Evreux 27000, France) and
Teejet (Spraying Systems Co, Glendale Heights, IL 60139-3408, USA):
4
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
— for the method A: disc DC-03, core CR-23with a spraying angle of (70 ± 10)° 300 kPa pressure
— for the method B: disc DC-04, core CR-25 with a spraying angle of (70 ± 10)° 300 kPa pressure
This information is given for the convenience of users of this part of ISO 17491 and does not constitute
an endorsement by ISO of the product named. Equivalent products (same nozzle spraying type, flow and
spraying angle at the indicated pressure) may be used if they can be shown to lead to the same results.
NOTE 2 Nozzles are subject to deterioration with use. A flowrate verification procedure is recommended
to check if they are still fit for use. For easy exchange of nozzles, it is recommended to mount the nozzles on a
bayonet-nut since the nozzles typically use plastic screw rings, which may be come loose over time.
6.10 Test Subjects and test subject dimensions
The body dimensions of the test subject, in particular the chest measurements, shall be measured
including all the garment underneath the test garment (e. g underwear, undergarments, any garment
worn to protect the test subject, absorbent overall). The test garment size shall be based on the range
indicated on the size label of the suit to be tested using the above measurements.
NOTE 1 Garment fit: Although the test subjects should be selected as close as possible to the upper limit of
the size range, the garment should not be too tight before the practical performance test as this may stretch
the seams. If garments are too big, leakages may not be detected because there is no contact between the test
garment and the absorbent overall. Overall a garment that is too tight is worse, than slightly too loose. Contact
between the absorbent overall and the inside of the test garment are important for this test procedure, care
should be taken to ensure that garment size selection for both the absorbent overall and the test garment can
achieve contact given the human subject’s body dimension. (See Annex B)
Some of the procedures specified in this part of ISO 17491 involve the use of processes that could lead to
a hazardous situation for a human test subject. Attention is drawn to the hazards for the test subject's
eyes, ears, nose and mouth, deriving from the application of a liquid spray.
NOTE 2 This part of ISO 17491 does not claim to indicate all hazards which might occur during its application.
For the protection of the test subject, national laws and requirements apply.
7 Preparation of the test subjects for the spray test
The test subject shall be dressed in the absorbent overall (see sub-clause 6.1), and subsequently with
the test garment (see sub-clause 6.10), in accordance with the manufacturer's instructions, as well as
any other items of protection (see Annex C.1 for donning).
If the manufacturer's instructions do not require or indicate the suit to be taped to any part of the body
of the wearer (such as at wrists and ankles) or to any additional item worn by the test subject (e.g.,
gloves or boots), then it shall not be taped.
NOTE The practical performance test described for the product standard ISO 16602, EN 13034 or EN 14605,
are to be carried out repeating each of the 7 movements three times prior to moving to the next movement.
8 Preparation of the spray application system
8.1 Test liquid
Confirm that the surface tension and the temperature are the same as the content written in clause 5.
8.2 Nozzle output
Before each test, calibration of the nozzles shall be performed. The flow of test liquid to the spray nozzles
and the pressure at the pump and at every nozzle shall be adjusted to obtain a flow rate according
to sub-clauses 6.8 and 6.9 and depending whether Method A or Method B are to be used. It may be
5
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oSIST prEN ISO 17491-4:2023
ISO/DIS 17491-4:2023(E)
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