SIST EN ISO 21853:2020

SLOVENSKI STANDARD
kSIST FprEN ISO 21853:2019
01-april-2019
=PDMDUVWYRQDYRGLVQHJX9DUQRVWQLVLVWHP]DVSXãþDQMH]PDMD9DUQRVWQH
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Kite boarding - Release system - Safety requirements and test methods (ISO/FDIS
21853:2019)
Kite-Boarding - Sicherheitssystem zum Auslösen des Kite - Sicherheitstechnische
Anforderungen und Prüfverfahren (ISO/FDIS 21853:2019)
Kite boarding - Système de largage pour cerf volant - Éxigences de sécurité et méthodes
d'essai (ISO/FDIS 21853:2019)
Ta slovenski standard je istoveten z: FprEN ISO 21853
ICS:
97.220.40 Oprema za športe na Outdoor and water sports
prostem in vodne športe equipment
kSIST FprEN ISO 21853:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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kSIST FprEN ISO 21853:2019

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kSIST FprEN ISO 21853:2019
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21853
ISO/TC 83
Kite boarding — Release system —
Secretariat: DIN
Safety requirements and test methods
Voting begins on:
2019­ 02­ 20
Kite boarding — Système de largage pour cerf volant - Éxigences de
sécurité et méthodes d'essai
Voting terminates on:
2019­ 04­ 17
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 21853:2019(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2019

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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
CH1214 V­ ernier, 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 2019 – All rights reserved

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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Safety requirements . 2
4.1 General . 2
4.2 Strength . 2
4.3 Design . 2
4.4 Handling. 3
4.4.1 General. 3
4.4.2 Triggering force . 3
4.4.3 Release force . 3
4.4.4 Duration of release . 3
4.4.5 Reachability . 3
4.5 Behaviour during release . 4
4.6 Additional requirements for cold and wet conditions . 4
4.7 Information supplied by the manufacturer . 4
4.7.1 User's manual . 4
4.7.2 Marking on the product . 5
5 Test methods . 5
5.1 Test apparatus . 5
5.2 Test environment . 6
5.2.1 Dry and clean conditions . 6
5.2.2 Sand . 6
5.3 Test conditions . 6
5.3.1 Dry and clean conditions . 6
5.3.2 Dry sand . 6
5.3.3 Water with sand . 7
5.3.4 Cold and wet conditions . 7
5.4 Sampling . 8
5.5 Preparation . 8
5.5.1 General function . 8
5.5.2 Releasing without generated load . 8
5.5.3 Prestr­ ess . . . 8
5.6 Procedure . 8
5.6.1 General. 8
5.6.2 Strength test .11
5.6.3 Dry and clean conditions .11
5.6.4 Dry sand .12
5.6.5 Water with sand .12
5.6.6 Cold and wet conditions .12
5.7 Sharp edges .12
5.8 Durability of marking .12
6 Test report .12
Annex A (informative) Test overview .13
© ISO 2019 – All rights reserved iii

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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(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 83, Sports and other recreational facilities
and 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.
iv © ISO 2019 – All rights reserved

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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

Introduction
In the last two decades, the sport of kite boarding/kite surfing has transformed from a marginal
sport to a popular sport performed by people of varying age groups and physiological condition levels.
However, it cannot be neglected that kite boarding still is considered an "extreme sport" due to risks
associated with speed, water and nature and unforeseeable situations related to these. If a situation
arising cannot be controlled by the user, the release system will be the component which would most
likely prevent emergencies, incidents,further injuries, or death.
This document has been developed in connection with the Global Kitesports Association (GKA) and
other stakeholders, such as trainers/instructors, test houses, universities and other manufacturers.
The aim of this document is to lower the risks associated with the sport for users and others.
When developing this document, requirements and test methods have been considered that resemble
as closely as possible situations occurring and conditions present while performing the sport. One of
the aspects was related to salt water. Tests conducted for validating the test methods have shown that
using salt water or non­ salted water has no effect on the test results. In order to keep the test method
as simple as possible, it was seen more practical for the test to use non­ salted water. In contrast to salt
water, sand has shown to have prominent effect on the function of the components and consequently
the test results.
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kSIST FprEN ISO 21853:2019

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kSIST FprEN ISO 21853:2019
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21853:2019(E)
Kite boarding — Release system — Safety requirements
and test methods
1 Scope
This document specifies the minimum safety requirement and test methods for a release system that
reduces the pulling force of the kite and disconnects the user from the kite.
This document is applicable for release systems which are operated intentionally by the user or another
person, and are used for the sport of kite boarding.
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 679, Cement — Test methods — Determination of strength
EN 12275, Mountaineering equipment — Connectors — Safety requirements and test methods
3 Terms a nd definiti ons
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 https:/ /www .iso. org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
kite
wing which generates an aerodynamic force and propels the user
EXAMPLE A wing that uses wind.
3.2
kite boarding
sum of the disciplines that can be performed with a kite (3.1) attached to the user with any kind of
board in any kind of environment
EXAMPLE Kite surfing, landboarding.
3.3
connection point
equipment on the harness or similar means affixed to the user where the main release system (3.4) is
attached
3.4
connecting link
part which allows the rider to stay connected to the kite via the disconnecting release system after
triggering the main release system
EXAMPLE A leash.
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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

3.5
release system
set of elements dedicated to reduce the risk of the user and of third parties, providing the functions of
the main release system and/or disconnecting release system
3.5.1
main release system
system that, when triggered via the trigger element, reduces or cancels the pulling force generated by
the kite
3.5.2
disconnecting release system
system that, when triggered via the trigger element, disconnects the user from the kite completely
3.6
control system
sum of the components held in the user's hand that enable the kite to turn and the traction force to
be altered
EXAMPLE A bar.
3.7
act of triggering
act of movement from first intended movement of any triggering element and releasing element until
the system releases
3.8
space of activation
space required for the movement of all the involved triggering elements and releasing elements to
function properly
4 Safety requirements
4.1 General
After each use, the release system shall not show signs of permanent deformation or of having been
affected by the triggering in any way that could provoke malfunction.
Test in accordance with 5.6.
4.2 Strength
If used, the main release system, the disconnecting release system and the connecting link shall
withstand a load of three times the maximum user weight as intended by the manufacturer or 3 600 N,
whichever is greater, without any breakage and shall still function as intended by the manufacturer.
Test in accordance with 5.6.2.
4.3 Design
The design of the release system shall indicate how to trigger it. The direction of triggering shall be
permanently identifiable.
Test in accordance with 5.8.
EXAMPLE 1 An example for this is a 3D structure (such as an embossed or elevated arrow) on the surface, or
a colour.
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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

The part of the release system which is used for triggering, i.e. the triggering element, shall have a
contrasting colour to the other parts of the release system, predominantly (>50 %) in red on its visible
surface. The other parts of the release system shall not be in contrasting colours to each other.
The release system should be free from finger entrapments, squeeze and shear points.
Edges that could come into contact with the user's hands during use or handling and maintenance
should not be sharp, e.g. deburred, broken, rolled or processed with comparable techniques.
Test in accordance with 5.7.
The space of activation shall not be restricted at any time by any part of the control system and by any
part/component of the release system.
NOTE This also relates to soft parts/components of the release system which could, while being gripped and
used for triggering, deform and/or tilt and consequently obstruct the actual movement of triggering.
While being triggered, no part/component of the release system should impact the user's hands.
4.4 Handling
4.4.1 General
It shall be possible to trigger the main release system by a first single action.
It shall be possible to trigger the disconnecting release system it by a second single action.
The action for triggering shall be ergonomically and kinematically suitable for the physiological
movements of the user.
It should be possible to trigger the main release system/disconnecting release system with garments,
e.g. gloves.
4.4.2 Triggering force
The force to perform the act of triggering shall be ≥20 N and ≤100 N.
Test in accordance with 5.6.1 in relation to certain conditions (see 5.6.3.1, 5.6.3.2, 5.6.4, 5.6.5 and, if
appropriate, 5.6.6).
The release system shall not show signs of plastic deformation or of having been affected by the tests in
any way that could provoke malfunction.
4.4.3 Release force
It shall be possible to trigger the main release system and/or disconnecting release system with one
hand only, without any load simulating the pulling force of the kite.
Test in accordance with 5.5.2.
4.4.4 Duration of release
The main release system and/or disconnecting release system shall be triggered in ≤2 s.
Test in accordance with 5.6.1.
4.4.5 Reachability
It shall be possible to trigger the main release system and/or disconnecting release system with eitherof
the user's hands as described in the user's manual. The connection points should not be on the back of
the user.
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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

4.5 Behaviour during release
All parts of the main release system and/or disconnecting release system designed to disengage as
intended by the manufacturer, by the act of triggering, shall disengage (force generated by kite reduced
or cancelled).
The disconnecting release system shall further disconnect the user from the kite.
Test in accordance with 5.6.
4.6 Additional requirements for cold and wet conditions
If the release system is designed to be used in cold and wet conditions, it shall be able to trigger the
main release system and/or disconnecting release system in extremely cold and humid conditions, as
defined in the test conditions.
NOTE Cold and wet conditions are related to snow kiting or other icy condition in which the user is likely to
wear gloves or other garments.
Test in accordance with 5.6.6.
4.7 Information supplied by the manufacturer
4.7.1 User's manual
The manufacturer shall provide information for use in written form at the point of sale with at least the
following:
a) reference to this document, i.e. ISO 21853:2019;
b) name and address of the manufacturer;
c) a recommendation to become familiar with the correct use of the release system;
d) warning to check the function of the release system before and after each use;
e) maintenance and cleaning instructions, including detail on wear, tear and replacement;
f) operating instructions outlining the main function(s) of the main release system for which it is
designed and tested, each accompanied with illustrations:
1) position of the connection points on the harness or similar means;
2) how to attach the main release system and/or disconnecting release system onto the
connection points of the harness or similar means to the user;
3) how to trigger the main release system and/or disconnecting release system;
4) how to reset the main release system and/or disconnecting release system;
g) warning that safety procedures cannot be learnt during an emergency situation and thus the use of
the release system requires training, e.g. by a recognized instructor or in a kite school;
h) maximum user weight, recommended to also have minimum user weight;
i) if the test in accordance with 5.6.6 has not been performed or passed, an indication that the release
system is impaired when used in icy conditions, e.g. for snow kiting;
j) information on compatibility with other systems, e.g. intended for hook, for ring, for rope and/or
different means as connection point;
k) note on potential risks if the release system is not used as intended by the manufacturer.
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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

If applicable, illustrations of secondary functions of the release system should be included.
4.7.2 Marking on the product
The release system shall be visibly and permanently marked at least with the following information:
a) reference to this document, i.e. ISO 21853:2019;
b) maximum user weight;
c) identification of the direction of the triggering operation;
d) name of the brand:
1) on the main release system, and
2) on the disconnecting release system.
The user's minimum weight may be marked.
Test in accordance with 5.8.
5 Test methods
5.1 Test apparatus
The following equipment shall be used:
a) a dynamometric measuring device;
b) a time measuring device;
c) a tensile test bench with a metal oval connector class X in accordance with EN 12275 with an inner
diameter of (30 ± 5) mm and a thickness of (10 ± 2) mm (see key detail Y in Figure 2) connected to
the release system; if the release system is intended to be used with specific connection points, this
shall be identified in the user's manual and provided by the manufacturer;
d) a trigger line with a diameter of (2 ± 1) mm, an elasticity of ≤1 % at 200 N and a breaking strength
of ≥400 N to be connected to the trigger element;
e) peak load measuring device, sample rate ≥1 000 Hz and accuracy ≥0,2 % within the range of ≥0 kg
and ≤20 kg;
f) a round tub with an inner diameter of (450 ± 50) mm (see Figure 2);
g) a device to measure the surface temperature, e.g. optical measurement or thermocouple.
The following additional equipment may be used:
h) a digital video equipment in order to time the operations, visualize the load losses and identify any
complication in the activation of the systems;
i) a digital photo equipment in order to be able to save pictures of potential flaws in the safety
systems.
If not specified otherwise, the following tolerances apply:
+5%
j) Force for the load application, in Newton:
−0
k) dimensions, in millimetre: ±1;
l) angle, in Degree: ±1;
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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

m) temperature, in Degree Celsius: ±2;
n) time, in second: ±5 %.
5.2 Test environment
5.2.1 Dry and clean conditions
The ambient temperature shall be ≤23 °C.
5.2.2 Sand
The sand shall be in accordance with ISO 679.
5.3 Test conditions
5.3.1 Dry and clean conditions
No conditioning shall be done.
5.3.2 Dry sand
The release system shall be cleaned without water to remove possible sand from a previous test
sequence or test cycle and to keep it dry.
The main release system and/or disconnecting release system shall be moved clockwise in five full
circles horizontally in accordance with Figure 1 in sand in accordance with 5.2.2 within (8 ± 2) s while
touching the inner bottom surface and inner side wall of the tub in accordance with 5.1 f). The safety
system shall be fully immerged in sand throughout that time.
NOTE The release system is usually moved around manually without touching the trigger element.
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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

Key
1 inner side wall of the round tub
Figure 1 — Movement of release system in sand for conditioning
The release system shall not be triggered.
After each conditioning, the sand shall be redistributed evenly in the tub.
This conditioning shall be done before each test in 5.6.4.
5.3.3 Water with sand
The release system shall be rinsed in non-salted water in order to remove possible sand from a previous
test sequence or test cycle.
The conditioning shall be done in accordance with 5.3.2 but with non­ salted water. The water­ to­
sand-ratio shall be 1:1 by volume. This mixture shall cover the release system entirely throughout the
conditioning.
This conditioning shall be done before each test in 5.6.5.
5.3.4 Cold and wet conditions
The assembled ("ready for use") main release system and/or disconnecting release system is fully spray
covered by 20 ml of distillated water with a temperature of ≤10 °C. Without being dried and shaken,
the main release system and/or disconnecting release system is exposed for 2 h to a temperature
of (−18 ± 1) °C. For this, the main release system and/or disconnecting release system is suspended
vertically in a use-like manner.
This conditioning shall be done before each test in 5.6.6.
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kSIST FprEN ISO 21853:2019
ISO/FDIS 21853:2019(E)

5.4 Sampling
One sample of a release system ready for te
...