ISO 15886-4:2019
(Main)Irrigation equipment — Irrigation sprinklers — Part 4: Test methods for durability
Irrigation equipment — Irrigation sprinklers — Part 4: Test methods for durability
This document specifies the conditions and methods for testing the durability of rotating sprinklers for irrigation. The term sprinkler is used here in a broad generic sense and is meant to cover a wide variety of products as classified in ISO 15886-1, which applies to all irrigation sprinkler classifications having both static parts and moving parts during operation, as defined by the manufacturer. For any given sprinkler, a wide range of nozzle configurations, operating conditions, and adjustments generates at least a theoretical need for a correspondingly large number of tests. Testing agencies and manufacturers can use interpolation techniques to reduce the number of actual test runs, provided accuracy standards are still being met.
Matériel d’irrigation — Sprinklers d’irrigation — Partie 4: Méthodes d’essai concernant la durabilité
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 15886-4
First edition
2019-06
Irrigation equipment — Irrigation
sprinklers —
Part 4:
Test methods for durability
Matériel d’irrigation — Sprinklers d’irrigation —
Partie 4: Méthodes d’essai concernant la durabilité
Reference number
ISO 15886-4:2019(E)
©
ISO 2019
---------------------- Page: 1 ----------------------
ISO 15886-4:2019(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
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 15886-4:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Installation of sprinklers under test. 3
5 Measurements . 3
5.1 Accuracy of measurements . 3
5.2 Pressure measurement . 4
6 Test conditions . 4
7 Tests to be performed before durability test . 4
7.1 Resistance to hydrostatic pressure at ambient temperature . 4
7.1.1 General. 4
7.1.2 Metal sprinklers . . 4
7.1.3 Plastic sprinklers . 5
7.1.4 Requirements . 5
7.2 Water tightness . 5
7.3 Flow rate as a function of inlet pressure . 5
7.3.1 General. 5
7.3.2 Test method . 5
7.3.3 Non-regulated sprinklers . 5
7.3.4 Regulated sprinklers . 6
7.4 Trajectory height . 6
7.5 Radius of throw and water distribution curve . 6
7.6 Uniformity of rotation (for rotating sprinklers intended to rotate in a uniform manner) . 8
8 Operating time of durability test . 8
9 Examination of sprinkler after durability test . 8
9.1 General . 8
9.2 Construction of sprinkler and its parts . 8
9.3 Resistance to hydrostatic pressure at ambient temperature . 8
9.4 Flow rate as a function of inlet pressure . 8
9.5 Trajectory height . 9
9.6 Radius of throw water and distribution curve . 9
9.7 Uniformity of rotation . 9
9.8 Distribution characteristics . 9
Bibliography .10
© ISO 2019 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 15886-4:2019(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 23, Tractors and machinery for agriculture
and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.
A list of all parts in the ISO 15886 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.
iv © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 15886-4:2019(E)
Irrigation equipment — Irrigation sprinklers —
Part 4:
Test methods for durability
1 Scope
This document specifies the conditions and methods for testing the durability of rotating sprinklers for
irrigation.
The term sprinkler is used here in a broad generic sense and is meant to cover a wide variety of products
as classified in ISO 15886-1, which applies to all irrigation sprinkler classifications having both static
parts and moving parts during operation, as defined by the manufacturer.
For any given sprinkler, a wide range of nozzle configurations, operating conditions, and adjustments
generates at least a theoretical need for a correspondingly large number of tests. Testing agencies and
manufacturers can use interpolation techniques to reduce the number of actual test runs, provided
accuracy standards are still being met.
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 15886-3:2012, Agricultural irrigation equipment — Sprinklers — Part 3: Characterization of
distribution and test methods
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 https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
ambient temperature
temperature of the air surrounding a sprinkler
3.2
area of coverage
area within the wetted boundary from a sprinkler operated within the range of effective application
rates specified in the manufacturer’s literature
3.3
clean water
water processed, if necessary, so as to contain suspended particles no larger than 74 microns (200 mesh)
equivalent and to contain no dissolved chemicals known to have short-term effects on sprinklers
materials
© ISO 2019 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 15886-4:2019(E)
3.4
distribution curve
graphical plot of water application depth as a function of distance from a sprinkler along a specified radius
3.5
distribution uniformity
DU
coefficient using the lowest 25 % of water application depths to characterize the uniformity of field-
measured or simulated water application from a grid of sprinklers
3.6
flow rate
volume of water passing through a device per unit of time
3.7
full grid collector arrays
collectors located at the intersections of a two-dimensional geometric grid pattern sufficient in number
to give a desired statistical basis for determining water distribution uniformity (3.5)
3.8
inlet connection size
nominal pipe size designation for commercial purposes or for manufacturer’s declaration defined by
reference to a recognized standard
3.9
maximum working pressure
P
max
highest water pressure at the inlet to a sprinkler recommended by the manufacturer to ensure proper
operation
3.10
minimum working pressure
P
min
lowest pressure at the inlet to a sprinkler recommended by the manufacturer to ensure proper
operation
3.11
nozzle
aperture of a sprinkler through which the water is discharged
3.12
nozzle pressure
pressure measured immediately upstream from a nozzle (3.11) or as inferred by a Pitot tube
measurement at the nozzle orifice
3.13
nozzle size
numerical size designation used for commercial purposes with no specific relationship to the actual
dimensions of a nozzle
3.14
part-circle sprinkler
sprinkler with an adjustable feature that enables it to irrigate a sector of a circular area, either with or
without an attachment which enables it to be adjusted to irrigate another sector or the entire circular area
3.15
regulated sprinkler
sprinkler that maintains a relatively constant flow rate at varying water pressures at the sprinkler inlet
within the limits specified by the manufacturer
2 © ISO 2019 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 15886-4:2019(E)
3.16
radius of throw
distance measured from a centreline of a continuously operating sprinkler to the most remote point at
which the sprinkler deposits water at the minimum effective application rate, measured at any arc of
coverage except near the arc extremes for part-circle sprinklers (3.14), also called wetted radius
3.1
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.