FprEN ISO 15027-1

SLOVENSKI STANDARD
01-julij-2023
Potopne obleke - 1. del: Stalno nošene obleke, zahteve, vključno z varnostjo
(ISO/DIS 15027-1:2023)
Immersion suits - Part 1: Constant wear suits, requirements including safety (ISO/DIS
15027-1:2023)
Schutzkleidung gegen Unterkühlung im Wasser - Teil 1: Kälteschutzanzüge,
Anforderungen einschließlich Sicherheit (ISO/DIS 15027-1:2023)
Combinaisons de protection thermique en cas d'immersion - Partie 1: Combinaisons de
port permanent, exigences, y compris la sécurité (ISO/DIS 15027-1:2023)
Ta slovenski standard je istoveten z: prEN ISO 15027-1
ICS:
13.340.10 Varovalna obleka Protective clothing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 15027-1
ISO/TC 188/SC 1 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2023-05-03 2023-07-26
Immersion suits —
Part 1:
Constant wear suits, requirements including safety
Combinaisons de protection thermique en cas d'immersion —
Partie 1: Combinaisons de port permanent, exigences, y compris la sécurité
ICS: 13.340.10
This document is circulated as received from the committee secretariat.
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ISO/DIS 15027-1:2023(E)
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ISO/DIS 15027-1:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 15027-1
ISO/TC 188/SC 1 Secretariat: AFNOR
Voting begins on: Voting terminates on:

Immersion suits —
Part 1:
Constant wear suits, requirements including safety
Combinaisons de protection thermique en cas d'immersion —
Partie 1: Combinaisons de port permanent, exigences, y compris la sécurité
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
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 15027-1:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements . 4
4.1 General . 4
4.2 Basic health and ergonomic requirements . 5
4.2.1 Innocuousness . 5
4.2.2 Design . 5
4.2.3 Comfort . 5
4.3 Other optional accessories . 5
4.4 Gas or air inflation . . 6
4.5 Buddy lines . 6
4.6 Conspicuity . 6
4.6.1 Colour . 6
4.6.2 Retro-reflective material . 7
4.6.3 Emergency position-indicating-lights . 8
4.7 Foam flotation material . 8
4.8 Flammability . 8
4.9 Temperature cycling . . 8
4.10 Leakage . 8
4.11 Thermal protection in water . 8
4.12 Performance requirements . 9
4.12.1 Donning . 9
4.12.2 Walking . 9
4.12.3 Climbing . 9
4.12.4 Dexterity and mobility . 10
4.12.5 Hand protection . 10
4.12.6 Jump test . 10
4.12.7 Secondary donning . . 10
4.12.8 Swim and boarding . 10
4.12.9 Flotation and righting . 10
4.12.10 Field of vision. 10
4.12.11 Helicopter escape . 11
4.13 Requirements on materials, fabrics and components . 11
4.13.1 Fuel resistance . 11
4.13.2 Resistance to illumination . 11
4.13.3 Tensile strength of seams . 11
4.13.4 Coated fabrics. 11
4.13.5 Other fabrics . 12
4.13.6 Thermal insulation identification .12
4.13.7 Metal components .12
4.14 Strength .12
5 Marking . .12
6 Information supplied by the manufacturer .13
7 Consumer information at point of sale .14
7.1 Data list . 14
7.2 Consumer information label . 14
iii
ISO/DIS 15027-1:2023(E)
Annex A (informative) Guidelines for manufacturers, users, regulators and industrial
inspectors about immersion suits with respect to the application of thermal
protection times relevant to the ISO 15027 series .16
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation 2016/425 aimed to be covered .19
iv
ISO/DIS 15027-1:2023(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 188, Small craft, Subcommittee SC 1,
Personal safety equipment.
This third edition cancels and replaces the second edition (ISO 15027-1:2012) which has been
technically revised.
The main changes are as follows:
— Terms and conditions have been revised;
— In subclause 4.3, requirements for Other optional accessories have been added;
— In table 3, new thermal performance level E, equivalent to SOLAS uninsulated immersion suit has
been added;
— In table 3, minimum immersed CLO values to Suit Performance levels have been added;
— In subclause 4.12, the Performance Requirements have been re-ordered to improve the order of
testing;
— In subclause 4.12.5, missing donning time for hand protection has been added;
— In clause 5, Warnings in Marking have been revised;
— In clause 7, Consumer information has been revised;
— Annex A has been revised;
A list of all parts in the ISO 15027 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
ISO/DIS 15027-1:2023(E)
Introduction
This part of ISO 15027 has been prepared to meet the needs of persons engaged in certain activities on
or near water.
The justification for using a constant wear suit would be to provide protection in the event of accidental
immersion, to prolong life and to aid rescue. An individual's estimated thermal protection time when
wearing this type of equipment will depend upon the water temperature, weather conditions, clothing,
the cold tolerance of the person and the person's behaviour. This part of ISO 15027 specifies the
minimum levels of insulation provided by the different ranges of suit in particular water temperatures.
This part of ISO 15027 allows for thermal protection to be provided by a variety of methods and
materials, some of which may require action when the suit enters the water (e.g. inflation of chambers
by gas from a cylinder). The compliance of a constant wear suit with this part of ISO 15027 does not
imply that it is suitable for all circumstances. This part of ISO 15027 cannot make detailed provision
for all the special uses to which a constant wear suit may be put, such as special working conditions, i.e.
slip resistance or fire resistance or special leisure applications.
This part of ISO 15027 is intended to serve as a minimum performance requirement for manufacturers,
purchasers and users of constant wear suits by ensuring that they provide an effective standard of
performance in use. Designers should encourage the wearing of this equipment by making it comfortable
and functional for continuous wear on or near water.
The primary aims in wearing a constant wear suit are:
a) to reduce the risk of cold shock and to delay the onset of hypothermia;
b) to enable the user to propel himself in the water and extricate himself from the water without it
becoming an encumbrance;
c) to make the user sufficiently conspicuous in the water so as to aid his recovery.
The performance of the suit may be altered by a number of factors, including wave action or the wearing
of additional equipment. Users, owners and employers should ensure that equipment is correctly
maintained according to manufacturer's instructions.
A suit system may comprise one or more pieces provided that in all cases it meets the requirements of
this document as a complete system.
A constant wear suit may often be worn with a lifejacket as it will provide extra flotation and may help
to bring a person to a face-up position.
vi
DRAFT INTERNATIONAL STANDARD ISO/DIS 15027-1:2023(E)
Immersion suits —
Part 1:
Constant wear suits, requirements including safety
1 Scope
This document specifies performance and safety requirements for constant wear immersion suits and
suit systems for professional and leisure activities to protect the user against the effects of cold water
immersion, such as reducing cold shock and delaying the onset of hypothermia.
It is applicable for dry and wet constant wear immersion suits and suit systems.
Abandonment suits are not covered by this document. Requirements for abandonment suits are given
in ISO 15027-2:202x. Test methods for immersion suits are given in ISO 15027-3:202x.
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.
1)
CIE 15:2004, Colorimetry
ISO 13688, Protective clothing - General requirements (ISO 13688:2013)
ISO 105-A02, Textiles — Tests for colour fastness — Part A02: Grey scale for assessing change in colour
ISO 105-B04, Textiles — Tests for colour fastness — Part B04: Colour fastness to artificial weathering:
Xenon arc fading lamp test
ISO 105-E02, Textiles — Tests for colour fastness — Part E02: Colour fastness to sea water
ISO 105-X12, Textiles — Tests for colour fastness — Part X12: Colour fastness to rubbing
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1421, Rubber- or plastics-coated fabrics — Determination of tensile strength and elongation at break
ISO 2411:2017, Rubber- or plastics-coated fabrics — Determination of coating adhesion
ISO 3801:1977, Textiles — Woven fabrics — Determination of mass per unit length and mass per unit area
ISO 4674-1:2016, Rubber- or plastics-coated fabrics — Determination of tear resistance — Part 1: Constant
rate of tear methods
ISO 7854:1995, Rubber- or plastics-coated fabrics — Determination of resistance to damage by flexing
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 12401:2009, Small craft — Deck safety harness and safety line — Safety requirements and test methods
ISO 12402-2:2020, Personal flotation devices — Part 2: Lifejackets, performance level 275 — Safety
requirements
1) Available from https:// www .cie .co .at/ main/ publist .html.
ISO/DIS 15027-1:2023(E)
ISO 12402-3:2020, Personal flotation devices — Part 3: Lifejackets, performance level 150 — Safety
requirements
ISO 12402-4:2020, Personal flotation devices — Part 4: Lifejackets, performance level 100 — Safety
requirements
ISO 12402-5:2020, Personal flotation devices — Part 5: Buoyancy aids (level 50) — Safety requirements
ISO 12402-6:2020, Personal flotation devices — Part 6: Special purpose lifejackets and buoyancy aids —
Safety requirements and additional test methods
ISO 12402-7:2020, Personal flotation devices — Part 7: Materials and components — Safety requirements
and test methods
ISO 12402-8:2020, Personal flotation devices — Part 8: Accessories — Safety requirements and test
methods
ISO 12402-9:2020, Personal flotation devices — Part 9: Evaluation
ISO 13688:2013, Protective clothing — General requirements
ISO 13934-1, Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force and
elongation at maximum force using the strip method
ISO 13935-2, Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 2:
Determination of maximum force to seam rupture using the grab method
ISO 13937-4, Textiles — Tear properties of fabrics — Part 4: Determination of tear force of tongue-shaped
test specimens (Double tear test)
ISO 15027-3:20xx, Immersion suits — Part 3: Test methods
2) 3)
Resolution A. 658(16) adopted by the IMO Assembly to amend the International Convention for the
Safety of Life at Sea (SOLAS), 1974, Use and fitting of retro-reflective materials on life-saving appliances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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
immersion suit
suit designed to protect the user's body from the cooling effects of immersion in water
Note 1 to entry: Cooling effects include cold shock (3.21) and hypothermia (3.14).
3.2
constant wear suit
immersion suit, designed to be routinely worn for activities on or near water in anticipation of
immersion in water, but permitting physical activity to such an extent that actions can be undertaken
without undue encumbrance and thus, head, hands and feet need not be covered
2) Accessible at https:// www .imo .org/ KnowledgeCentre/ Ho wAndWhereT oFindIMOIn formation/ In
dexofIMORe solutions/ Pages/ Assembly -(A) .aspx.
3) IMO is the abbreviation for International Maritime Organization, based in London, UK. IMO issues regulations
which are then published as laws by the member states.
ISO/DIS 15027-1:2023(E)
3.3
abandonment suit
immersion suit including head, hand and feet protection designed to permit rapid donning in the event
of an imminent immersion in water
3.4
dry suit
immersion suit which covers all or particular regions of the body and which is designed to prevent the
ingress of water upon immersion
3.5
wet suit
immersion suit which covers all or particular regions of the body and which is designed to limit the
flow of water in and out of the suit
3.6
secondary suit closure
additional closure which can be operated by the user to enhance the fit of the suit
3.7
exterior fabric
outer fabric of a suit, either in the form of a single or composite fabric
3.8
retro‑reflective material
material that reflects light beams back to their point of origin
3.9
buddy line
length of cord which can be tied or otherwise fixed to another person, or to that person’s personal
flotation device or other objects, so as to keep a user in the vicinity of that person or object with a view
to making location and thus rescue easier
3.10
clo value
unit to express the relative thermal insulation values of various clothing assemblies
2 –1
Note 1 to entry: One clo is equal to 0,155 Km W .
3.11
hypothermia
condition where body core temperature is below 35 °C
3.12
helicopter transit suit
constant wear suit worn by helicopter occupants
3.13
offshore installation
structure or vessel that is permanently or temporarily sited at sea or away from the shore in a fresh
water lake or river and which is not covered by other international regulations
3.14
suit system
immersion suit including its components and accessories, and any auxiliary buoyancy, or personal
flotation device (PFD)
Note 1 to entry: The storage bag is not part of the suit system.
ISO/DIS 15027-1:2023(E)
3.15
underclothing
clothes worn under the suit system
Note 1 to entry: The underclothing to be worn with the suit system shall be specified by the manufacturer. If not
specified by the manufacturer, it shall be according to ISO 15027-3:20xx, 3.8.1.3.
3.16
heat strain
increase of body temperature induced by sustained heat stress which cannot be fully compensated by
temperature regulation, or activation of thermoeffective activities in response to heat stress which
cause sustained changes in the state of other, nonthermal, regulatory systems
3.17
cold shock
short transitory phase lasting about 2 min to 3 min upon sudden immersion in cold water and
characterized by an uncontrollable hyperventilation accompanied by other cardio-respiratory distress
4 Requirements
4.1 General
4.1.1 A constant wear suit system (dry or wet suit) shall meet the requirements of this document.
The suit shall not be damaged or fail in its determined function when tested in accordance with
ISO 15027-3:20xx, Clause 3.
When a PFD or auxiliary buoyancy is part of the suit system, it shall be tested and included as part of
the suit system.
4.1.2 The suit system shall be designed so as not to impede the user during normal use when tested
in accordance with ISO 15027-3, 3.15.
4.1.3 All suit samples shall undergo temperature cycling in accordance with ISO 15027-3:20xx 3.3,
followed by the rotating shock bin test in accordance with ISO 15027-3:2020 3.4, and cleaning shall
be done according to the specification of the manufacturer in accordance with ISO 15027-3:20xx 3.11,.
prior to all remaining tests.
4.1.4 The manufacturer shall specify the components of the suit system including underclothing and
additional items. The constant wear suit may incorporate additional items compliant with ISO 12402-8,
none of which shall impair its performance with respect to the requirements of this part of ISO 15027,
either by their presence or their use. If a safety harness forms an integral part of the suit designed to
comply with this part of ISO 15027, then the complete assembly shall comply both with ISO 12401 and
with this part of ISO 15027.
4.1.5 The risk of heat stress and discomfort shall be taken into account in the design and use of
the suit system with underclothing. This should be accompanied in the information supplied by the
manufacturer by specific advice or warnings according to Clause 6.
NOTE In general, the higher the protection against cold shock and hypothermia, the higher the possibility of
heat strain is. The user of a constant wear suit needs to balance those two effects when choosing a device.
4.1.6 The rotating shock bin test according to ISO 15027-3:20xx, 3.4 shall be performed on each
sample. There shall be no visible migration of insulation material and no visible wear-and-tear damage
after the rotating shock bin test.
ISO/DIS 15027-1:2023(E)
4.1.7 Unless the suit system has been designed to be used without a PFD, the suit system shall not
prevent the donning of a PFD in accordance with ISO 12402-2 or ISO 12402-3 and the manufacturer of
the suit system shall specify the type of PFD (inflatable and/or inherent) to be used.
4.1.8 The suit system shall be designed in such a way as to minimize the risk of snagging. Test in
accordance with ISO 15027-3:202x, 3.10.
4.2 Basic health and ergonomic requirements
4.2.1 Innocuousness
The suit system shall not adversely affect the health or hygiene of the user. The materials shall not, in
the foreseeable conditions of normal use, release substances generally known to be toxic, carcinogenic,
mutagenic, allergenic, toxic to reproduction or otherwise harmful.
NOTE More information can be found in ISO 13688.Materials should be selected to minimize the
environmental impact of the production and disposal of protective clothing (see ISO 13688:—, Annex F).
The examination, in combination with the following requirements in 4.2, shall determine whether
the claim that the materials are suitable for use in the protective clothing or protective equipment is
justified. Particular attention has to be paid to the presence of plasticizers, unreacted components,
heavy metals, impurities and the chemical identity of pigments and dyes.
4.2.2 Design
The design of the suit system shall facilitate its correct positioning on the user and shall ensure that it
remains in place for the foreseeable period of use, taking into account ambient factors, together with
the movements and postures that the wearer could adopt during the course of work or other activity.
For this purpose, appropriate means, such as adequate adjustment systems or adequate size ranges
shall be provided to enable the suit system to be adapted to the morphology of the user.
4.2.3 Comfort
4.2.3.1 The suit system shall provide users with a level of comfort consistent with the level of
protection against hazards for which it is intended, the ambient conditions, the level of the user’s
activity, and the anticipated duration of use of the protective clothing.
The suit system shall not
— have rough, sharp or hard surfaces that irritate or injure the user;
— be so tight, loose and/or heavy that it restricts normal movement.
4.2.3.2 If applicable, the suit shall be made of materials with low water-vapour resistance and/or high
air permeability and/or shall be sufficiently ventilated to minimize discomfort and thermal stress.
4.2.3.3 A suit system that imposes significant ergonomic burdens such as heat stress, or is inherently
uncomfortable because of the need to provide adequate protection, should be accompanied by specific
advice or warnings in the information supplied by the manufacturer. Specific advice on the appropriate
duration for continuous use of the clothing in the intended application(s) should be given.
4.3 Other optional accessories
Suit systems may be equipped with further accessories. Where applicable such accessories shall comply
with ISO 12402-8:2020, and shall be tested as a part of the suit system. No accessory shall impair the
suit system’s performance.
ISO/DIS 15027-1:2023(E)
4.4 Gas or air inflation
If any part of the suit relies upon air or gas inflation in order to achieve the performance levels set
out within this part of ISO 15027 then each part of the assembly — namely: oral inflation tubes,
inflation system and the gas cylinder — shall be tested in accordance to and comply with the relevant
requirements of ISO12402 -7: 2020.
The inflatable buoyancy chamber material shall meet the relevant requirement of ISO 12402-7:2020,
4.9.
4.5 Buddy lines
A buddy line, if provided, shall be made from synthetic cord or webbing and shall be at least 1 500 mm
in length. The line shall be attached securely to the suit and have a free end with a releasable means for
attachment to another person or object, such as a loop, a snap hook, or a wooden or plastic toggle. The
buddy line, if provided, shall be readily accessible to at least one of the user's hands as confirmed during
device testing. The attachment means and line shall be stowed in such a way that they do not create a
hazard or affect the normal operation of the immersion suit. If hardware is provided as an attachment
means, it shall not have sharp edges. The assembly shall float in fresh water. Hardware on the buddy line
shall either not be broken, or if broken, not expose sharp edges after pull testing. Weathering testing is
not required when the buddy line is normally stowed inside a pocket.
If provided, a buddy line shall be tested in accordance with ISO 12402-9:2020, 5.5.6 and withstand a
+1
(750 ± 50) N load for at least 3 min without any damage. The force required to separate the buddy
line from the suit shall be greater than 750 N and less than 1 500 N. The separation of the buddy line
from the immersion suit shall not adversely affect the integrity of the immersion suit. This shall be
verified by visual inspection.
The buddy line, if provided, shall be in accordance with ISO 12402-8:2020, 5.4.
4.6 Conspicuity
4.6.1 Colour
A constant wear immersion suit may be any colour.
4.6.1.1 Where colour is required for search and rescue,
— the colour of the exposed portions (excluding components such as webbing, zips and other fittings)
of the suit when deployed in the face-up floating position shall be in the colour range from yellow to
red,
— the chromaticity coordinates for non-fluorescent colours shall lie within one of the areas defined in
Table 1, and
— the luminance factor shall exceed the corresponding value in Table 1.
The chromaticity coordinates and the luminance factor for fluorescent colours shall comply with
Table 2.
The face-up floating position is defined during in-water test according to ISO 15027-3:202x, 3.10.6.
Where colour does not aid search and rescue, other means of detection shall be provided.
4.6.1.2 The colour of the material samples shall be measured with the procedures defined in
CIE 15:2004 with polychromatic illumination D65 and 45/0 geometry and 2° standard observer.
The specimen shall have a black underlay with reflectance of less than 0,04. The specimens shall be
conditioned for at least 24 h at (20 ± 2) °C and (65 ± 5) % relative humidity. If the test is carried out
ISO/DIS 15027-1:2023(E)
in other conditions, the test shall be conducted within 5 min after withdrawal from the conditioning
atmosphere.
4.6.1.3 The colour fastness (dry and wet) of immersion suit material when determined in accordance
with ISO 105-A02 shall be resistant to rubbing (wet and dry), when tested in accordance with ISO 105-
X12 to at least step 4, and to salt water when tested in accordance with ISO 105-E02 to at least step 4.
Table 1 — Chromaticity coordinates x and y and luminance factor β for yellow, orange and red
non‑fluorescent colours of suit material
Chromaticity coordinates Luminance factor
Colour
x y β
0,389 0,610
0,320 0,490
Yellow > 0,35
0,405 0,400
0,500 0,500
0,500 0,500
0,405 0,400
Orange > 0,25
0,470 0,330
0,600 0,400
0,610 0,400
0,470 0,330
Red > 0,15
0,525 0,270
0,700 0,300
Table 2 — Chromaticity coordinates x and y and luminance factor β for yellow, yellow-orange,
orange, orange‑red and red fluorescent colours of suit material
Chromaticity coordinates Luminance factor
Colour
x y β
0,380 0,610
0,320 0,490
Fluorescent yellow > 0,60
0,370 0,440
0,440 0,550
0,440 0,550
0,370 0,440
Fluorescent yellow-orange > 0,50
0,420 0,390
0,505 0,490
0,505 0,490
0,420 0,390
Fluorescent orange > 0,40
0,460 0,350
0,575 0,425
0,575 0,425
0,460 0,350
Fluorescent orange-red > 0,30
0,488 0,320
0,630 0,360
0,630 0,360
0,488 0,320
Fluorescent red > 0,20
0,525 0,280
0,695 0,300
4.6.2 Retro‑reflective material
A passive light system of retro-reflective material shall be provided. This shall conform to the
specification detailed in IMO Resolution A.658(16), Annex 2. If it is the only light system, then a total
2 2
area of not less than 400 cm shall be provided. At least 100 cm shall be affixed to the hood, if a hood
is provided, and in addition at least 250 cm shall be clear of the water and visible in the suit's normal
ISO/DIS 15027-1:2023(E)
in-water position as tested in ISO 15027-3:2020, 3.10.6.4.1. At least one piece of 50 cm shall be affixed
to the back of the suit.
The performance of the retro-reflective material shall not be degraded by the method used to apply it
to the suit. Test in accordance with ISO 15027-3:20xx, 3.10.6.4.2.
4.6.3 Emergency position-indicating-lights
An active light system may also be provided. This shall conform to the requirements for emergency
lights according to ISO 12402-8:2020.
Alternative systems to provide Conspicuity to assist search and rescue operations, such as combinations
of active light systems (emergency lights) and passive light systems (retro-reflective material) will be
acceptable if they meet the specifications for both emergency lights and retro-reflective material as
defined above.
4.7 Foam flotation material
Foam flotation material used to assist the buoyancy performance of the suit system shall comply
with ISO 12402-7:2020, 4.8. The buoyancy of the suit system shall be tested in accordance with
ISO 15027-3:20xx, 3.7. The buoyancy measurement after 24 h shall not exceed 5 % buoyancy loss of the
original buoyancy.
4.8 Flammability
When tested in accordance with ISO 15027-3:20xx, 3.10, the suit material shall neither be consumed
nor sustain burning nor continue melting 6 s after being removed from the flames.
4.9 Temperature cycling
The suit system, excluding a separate PFD, where applicable, shall be resistant to damage caused by
changes in ambient temperature.
After temperature cycling in accordance with ISO 15027-3:20xx, 3.3, the suit system shall show no
visible damage to the external and internal construction components, such as shrinking, cracking,
swelling, dissolution or change of mechanical qualities.
Additionally, after temperature cycling, dry suits shall be subjected to the leak test in accordance with
ISO 15027-3:20xx, 3.13.
4.10 Leakage
The leakage of a dry suit system during jumping shall be measured in accordance with ISO 15027-3:20xx,
3.13.1 and the mass of measured water shall not exceed 500 g.
The leakage of a dry suit system during swimming shall be measured in accordance with
ISO 15027-3:20xx, 3.13.2 and the mass of measured water shall not exceed 200 g.
4.11 Thermal protection in water
The suit system with the underclothing specified by the manufacturer or with standard underclothing
according to ISO 15027-3:20xx, 3.14.1.2 shall provide the user with thermal protection in a hydrostatical
compressed state as defined by its flotation position. This part of ISO 15027 recognizes the need for
different levels of thermal protection depending upon the water temperature in which the suit will be
used. The conditions of thermal protection are shown in Table 3. Testing shall be in accordance with
ISO 15027-3:20xx, 3.14. None of the six human test subjects' core temperatures shall fall more than
2 °C. Each human test subject's skin temperature shall not be lower than 10 °C for a time period of more
ISO/DIS 15027-1:2023(E)
than 15 min. If either of these two requirements is not fulfilled, the suit system shall be deemed to have
failed.
NOTE See Annex A for more information on thermal protection time.
Table 3 — Thermal performance levels
a
Suit performance level
b c
A B C D E
Duration (h) 6 4 2 2 1
Water temperature (°C) 2 2 5 10 5
Immersed CLO (minimum) 0,75 0,60 0,33 0,25 0,16
a
Tests are performed in calm water. Rough conditions (e.g. wind, waves) will decrease the stated period of immersion.
b
Equivalent to SOLAS insulated immersion suit, when tested at a water temperature of maximum 2 °C.
c
Equivalent to SOLAS uninsulated immersion suit.
There are two options for measuring the thermal protection provided if the results are equivalent:
a) using a thermal manikin, in accordance with ISO 15027-3:20xx, 3.8.1;
b) using human test subjects, in accordance with ISO 15027-3:20xx, 3.8.2.
When tested with a thermal manikin in accordance with ISO 15027-3 X.XX, the Clo-value shall not be
less than the values indicated in Table 3.
When using human subjects for testing none of the six human test subjects' core temperatures shall
fall more than 2 °C. Each human test subject's skin temperature shall not be lower than 10 °C for a time
period of more than 15 min. If either of these two requirements is not fulfilled, the suit system shall be
deemed to have failed.
4.12 Performance requirements
4.12.1 Donning
When tested in accordance with ISO 15027-3:20xx, 3.15.2.1 b), it shall be possible to don the suit system,
and secure all primary closures, within 5 min.
Where the suit system includes an inflatable element integrated into the suit, the 5 min donning time
shall include inflation of the inflatable element.
Where the suit system includes a separate PFD, the 5 min donning time shall include donning of the
uninflated PFD and subsequent inflation.
There shall be no damage to the suit system after donning.
4.12.2 Walking
A user wearing the suit system correctly donned shall be able to walk easily as tested in accordance
with ISO 15027-3:20xx, 3.15.3.1.
4.12.3 Climbing
A user wearing the suit system correctly donned shall be able to climb freely as tested in accordance
with ISO 15027-3:20xx, 3.15.4.1.
ISO/DIS 15027-1:2023(E)
4.12.4 Dexterity and mobility
Whe
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